Datex-Ohmeda Aespire 7900 User manual

Aespire 7900

User’s Reference Manual—Part 1

System Controls, Operation, Checkout

User Responsibility

This Product will perform in conformity with the description thereof contained
in this User’s Reference manual and accompanying labels and/or inserts,
when assembled, operated, maintained, and repaired in accordance with the
instructions provided. This Product must be checked periodically. A defective
Product should not be used. Parts that are broken, missing, plainly worn,
distorted, or contaminated should be replaced immediately. Should repair
or replacement become necessary, Datex-Ohmeda recommends that a
telephonic or written request for service advice be made to the nearest
Datex-Ohmeda Customer Service Center. This Product or any of its parts
should not be repaired other than in accordance with written instructions
provided by Datex-Ohmeda and by Datex-Ohmeda trained personnel.
The Product must not be altered without the prior written approval of
Datex-Ohmeda. The user of this Product shall have the sole responsibility
for any malfunction which results from improper use, faulty maintenance,
improper repair, damage, or alteration by anyone other than Datex-Ohmeda.

w CAUTION U.S. Federal law restricts this device to sale by or on the order of

a licensed medical practitioner. Outside the U.S.A., check local
laws for any restriction that may apply.

Datex-Ohmeda products have unit serial numbers with coded logic which
indicates a product group code, the year of manufacture, and a sequential
unit number for identification.

AAA F 12345

This alpha character indicates the year of product
manufacture and when the serial number was
assigned; “D” = 2000, “E” = 2001, “F” = 2002, etc.
“I” and “O” are not used.

S/5 Aespire, Link-25, Disposable Multi Absorber, Reusable Multi
Absorber, SmartVent, Tec 6 Plus, and Tec 7 are registered trademarks of

Datex-Ohmeda Inc.

Other brand names or product names used in this manual are trademarks or
registered trademarks of their respective holders.

Table of Contents

1 Introduction

What is an Aespire 7900? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Symbols used in the manual or on the equipment . . . . . . . . . . . . . . . . . . . . 1-3

2 System Controls and Menus

Anesthesia system controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Breathing system components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

ACGO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

3 Operation and Tutorial

Scavenging the ACGO sample flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Scavenging from the external manual breathing circuit . . . . . . . . . . .2-10

Vaporizer controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-10

Ventilator controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-12

Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-12

Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

How to set controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-14

How to use the menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-15

Menu map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-16

More about menu functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-17

How to change menu settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

Optional auxiliary O

Pre-use check list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Turn On the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Set the alarm loudness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

flowmeter and suction regulators . . . . . . . . . . . . . . .2-19

2

1009-0632-000

Show or hide alarm limits and units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Turn the volume alarms on or off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Set alarm limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Set an audible alarm for circuit leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Set Cardiac Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11

i

S/5 Aespire

Start mechanical ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Stop mechanical ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15

Alarm Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Alarm Silence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15

Alarm Suspend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Set the ventilation mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Set ventilator controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Optional features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Ventilator controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Volume Control mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19

Pressure Control mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20

SIMV mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20

PSVPro mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20

4 Preoperative Tests

Set inspiratory pause (volume modes) . . . . . . . . . . . . . . . . . . . . . . . . 3-22

Set SIMV and PSVPro controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-24

Silence alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-26

Reading the pressure waveform (Paw) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27

Scales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-27

Measure circuit compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-30

Show the service settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-31

Measure circuit compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-33

Aespire 7900 Preoperative tests schedules . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Test Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Test devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Inspect the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Power failure alarm test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Minimize alarms (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Pipeline and cylinder tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Flow control tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Vaporizer installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Vaporizer back pressure test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

Low-pressure leak test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11

Negative low-pressure

leak test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

ii

1009-0632-000

Index

Warranty

ISO 5358 or BSI standard positive low-pressure

leak test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

Alarm tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14

Breathing system tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

Monitor and ventilator tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-18

1009-0632-000

iii

S/5 Aespire

iv

1009-0632-000

1 Introduction

In this section

What is an Aespire 7900? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Symbols used in the manual or on the equipment . . . . . . . . . . . . . . . . . . . . 1-3

1009-0632-000

1-1

Aespire 7900

What is an Aespire 7900?

The Aespire 7900 is a compact, integrated and intuitive anesthesia delivery
system. The ventilator portion provides mechanical ventilation for patients
during surgery as well as monitoring and displaying various patient
parameters.

The system uses a microprocessor-controlled ventilator with internal
monitors, electronic PEEP, Volume Mode, and other optional features. A serial
interface permits communication to cardiovascular and respiratory gas
monitoring.

Illustrations in this manual may not cover all types of options available. Other
equipment may be attached to the system on the top shelf or on the side
dovetail rails. Consult with your Datex-Ohmeda representative for details
about systems available in your location.

The Aespire 7900 is not suitable for use in an MRI environment.

1-2

Figure 1-1 • Aespire 7900 example

1009-0632-000

Symbols used in the manual or on the equipment

1 Introduction

w WARNINGS and w

can occur if you do not follow all instructions in this manual. Read and follow
all warnings and cautions.

WARNINGS tell about a condition that can cause injury to the operator or the

patient.

CAUTIONS tell about a condition that can cause damage to the equipment.

A Note provides additional information to clarify a statement in text.

An Important statement is similar to a Note, but provides a comment of
greater emphasis.

Other symbols replace words on the equipment or in Datex-Ohmeda manuals.
No one device or manual uses all of the symbols. These symbols include:

On (power)

øø

øø

Off (power)

O

Standby

o

Standby or preparatory state for part of the

q

equipment

CAUTIONS tell you about dangerous conditions that

Not autoclavable

ÍÍ

ÍÍ

Type B equipment

mm

mm

Type BF equipment

µµ

µµ

Type CF equipment

HH

HH

p

œ

†

∏
x

y

å

t

T

“ON” only for part of the equipment

“OFF” only for part of the equipment

Direct current This way is up.

Alternating current

Protective earth ground

Earth ground Output

Frame or chassis ground

r

Alarm silence button

Equipotential

Y

wwwwWW

Caution, ISO 7000-0434

ww

ww

Attention, refer to product

WW

instructions, IEC 601-1.

N

N

Dangerous Voltage

ππ

ππ

Input

≈≈

≈≈

REF Stock Number

NN

SSSSNN

Serial Number

Bag position/ manual ventilation

R

Variability Read top of float

Variability in steps Vacuum inlet

1009-0632-000

1-3

Aespire 7900

++

++

Plus, positive polarity Suction bottle outlet

--

--

P

N

ˆ

z

Z

44

CC

1111333344

°CC

u

Minus, negative polarity

Lamp, lighting, illumination Cylinder

Movement in one direction Isolation transformer

Movement in two directions Low pressure leak test

Lock

OO

OO

O

Flush button

2

++

++

22

22

Mechanical ventilation

r

Unlock

Close drain

U

Autoclavable

Expiratory flow

Q

Open drain (remove liquid) Alarm silence touch key

q

t

XXXX

Inspiratory flow Menu touch key

O2 sensor connection Alarm silence touch key

(Tec 6)

Volume alarms On/Off touch key End case touch key

Systems with this mark agree with the
European Council Directive (93/42/EEC) for
Medical Devices when they are used as
specified in their Operation and Maintenance
Manuals. The xxxx is the certification number
of the Notified Body used by Datex-Ohmeda’s
Quality Systems.

European Union Representative

1-4

1009-0632-000

2 System Controls and Menus

In this section

Anesthesia system controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Breathing system components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Vaporizer controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-10

Ventilator controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-12

Optional auxiliary O

flowmeter and suction regulators . . . . . . . . . . . . . . .2-19

2

1009-0632-000

2-1

Aespire 7900

Anesthesia system controls

ww

ww

WARNING Explosion Hazard. Do not use S/5 Aespire systems with

ww

ww

WARNING Do not use antistatic breathing tubes or masks. They can cause

flammable anesthetic agents.

burns if you use them near high frequency surgical equipment.

3

2

1

10

9

1. Breathing system

2. Flow controls

3. Ventilator / monitoring display

4. Dovetail rails

5. Vaporizer

6. System switch

7. Pipeline pressure gauge(s) (upper row)

8. Cylinder pressure gauge(s) (lower row)

9. Brake

10. O

flush button

2

4

5

6

7, 8

2-2

Figure 2-1 • Aespire (front view)

1009-0632-000

2 System Controls and Menus

Figure 2-1 shows these controls on the front of the S/5 Aespire.

Item Description

2 Flow controls Turn the control counterclockwise to increase the flow

and clockwise to decrease. The system switch must
be On for gas to flow.

7System switch Set the switch to the on ( ||

||

) position to permit gas flow

and to turn on the system.

9Brake Push down to lock. Lift to release.

10 O

flush button Push the O

2

flush button to supply high flows of O

2

the breathing system.

to

2

1009-0632-000

2-3

Aespire 7900

1

2

7

6

5

4

3

1. Circuit Breaker for Electrical Outlet

2. Electrical Outlet (optional)

3. Equipotential Stud

4. Mains Inlet

5. System Circuit Breaker

6. Cylinder(s) (optional)

7. Pipeline Connection(s)

2-4

Figure 2-2 • Aespire rear view

1009-0632-000

Breathing system components

19

17

16

15

14

13

12

11

10

2 System Controls and Menus

1

2

18

9

8

1. Auxiliary common gas outlet (ACGO) switch

2. ACGO

3. Inspiratory check valve (unidirectional valve)

4. Inspiratory flow sensor / patient connection (circuit connections)

5. Canister (carbon dioxide absorbent)

6. Canister release

7. Expiratory flow sensor / patient connection (circuit connections)

8. Leak test plug

9. Expiratory check valve (unidirectional valve)

10. Breathing system release

11. Manual bag port

12. APL (adjustable pressure-limiting) valve

13. Bag/mechanical ventilation switch

14. Bellows assembly (mechanical ventilation)

15. Pressure gauge (airway)

16. Sample gas return port

17. Serial port

18. Manual Bag (optional; no bag arm)

19. Bag arm (optional)

76 5

4

3

1009-0632-000

Figure 2-3 • Breathing system parts

2-5

Aespire 7900

Figure 2-3 shows these controls on the front of the S/5 Aespire.

Item Description

1Auxiliary Common

Gas Outlet switch
(ACGO)

Sends fresh gas to the ACGO when the switch is
activated. The ACGO may be used to provide fresh
gas to an external manual breathing circuit.
Mechanical ventilation is not available when the
auxiliary outlet is selected and a medium priority
alarm will sound and a message “Aux Gas Outlet On”
is displayed. Pressure and volume monitoring are
not available when the ACGO is selected. Fresh gas
oxygen monitoring is available when the ACGO is
selected.
The ACGO should not be used to drive external
ventilators or for jet ventilation.
Breathing system selected:

Auxiliary outlet selected:

2-6

4 & 7 Flow sensor Flow sensors provide volume measurements for

some monitoring functions. All systems have flow
sensors in both positions of the flow sensor module.

1009-0632-000

O:

2 System Controls and Menus

Item Description

6 Canister release Push to remove the canister. This allows the

breathing system to vent to the room. Be sure to hold
the canister by the handle before releasing the
canister.
Note: Always do a leak test after operating the
canister release.

12 APL valve Adjusts breathing system pressure limit during

manual ventilation. The scale shows approximate
pressures. Above 30 cm H

O, you will feel clicks as

2

the knob turns. Turn clockwise to increase. The
following example setting is at about 20 cm H

70

M

I

N

30

20

2

1009-0632-000

2-7

Aespire 7900

Item Description

13 Bag / Mechanical

Ventilation switch

17 Bag arm (optional) Squeeze at (1) to raise or lower the arm. The Bag arm

Selects between manual ventilation (bag) or
mechanical ventilation (ventilator).
Mechanical ventilation Off (gas to bag):

Mechanical ventilation On (gas to bellows):

rotates at (2).

2-8

ACGO

1

2

When you operate a breathing apparatus with fresh gas from the ACGO:

• Mechanical ventilation is not available.

• The pressure gauge, Bag/Vent switch, APL valve, and bag arm are not
part of the external circuit.

• Volume and pressure monitoring are not available.

•O

monitoring of fresh gas is available automatically when the ACGO is

2

selected if the system has the O

monitoring option.

2

1009-0632-000

2 System Controls and Menus

• Fresh gas oxygen concentration is displayed on the ventilation screen.
Set alarm limits appropriately. Note that fresh gas oxygen concentration
may not reflect FiO
Use an external O

•A sample of the fresh gas is diverted to the O
system.

• The sample flow to the O
external circuit. The sample flow reduces the fresh gas flowrate to the
external breathing circuit as shown in the graph.

• Do not use an external ventilator on the ACGO.

• Do not use the ACGO to drive external ventilators or for jet ventilation.

Estimate the mean pressure required for ventilation and determine a mean
sample flow rate from the graph:

3

in rebreathing circuits such as the Mapleson series.

2

monitor if using a rebreathing circuit on ACGO.

2

cell in the breathing

2

sensor is dependent on the pressure in the

2

Scavenging the ACGO

sample flow

2

/min

1

10

20

30 40

cm H20

Figure 2-4 • Back pressure (cm H

If the external manual breathing circuit is to be used with N
anesthetics, the sample flow should be scavenged.

1. Occlude the patient circuit of the breathing system by using the leak test
plug located to the rear of the expiratory port.

2. Check for clinically correct settings. Set the Bag to Vent switch to the
ventilator mode. Alternatively set the Bag to Vent switch to the bag mode
and set the APL to MIN and attach a bag.

0) vs. flow to O

2

50 60 70 80

sensor (L/min)

2

O or volatile

2

1009-0632-000

3. The bellows, or bag, will fill slowly with the fresh gas sample flow and then
spill to the AGSS.

2-9

Aespire 7900

Scavenging from the

external manual

breathing circuit

Vaporizer controls

If the external manual breathing circuit is to be used with N
anesthetics, the exhaust should be scavenged.

An auxiliary inlet is available for active AGSS units. It provides a 30 mm male
connection into the auxiliary port under the breathing system.

• The auxiliary inlet is a convenience inlet to the air brake of active AGSS
units. There is a reservoir to capture exhaust flows higher than the extract
flow.

For all AGSS, a separate exhaust hose is necessary from the external manual
circuit to the disposal point.

Refer to the description in this section and the vaporizer operation and
maintenance manual for more detailed information on the vaporizer.

Figure 2-5 shows the vaporizer controls.

1

2

3

4

O or volatile

2

1. Lock Lever

2. Concentration Control and Release

3. Tec 6 Plus

4. Tec 7

Figure 2-5 • Vaporizer controls

Item Description

1 Lock lever Turn the lever fully clockwise to lock the vaporizer in

position.

2-10

1009-0632-000

Item Description

2 System Controls and Menus

2 Concentration

control and release

Push the release and turn the concentration control
to set the agent concentration. The Tec 6 Plus
concentration control does not turn as long as the
warm-up indicator is on.

Åben

1009-0632-000

2-11

Aespire 7900

Ventilator controls

Optional Features

Control panel

13

The Aespire 7900 can be equipped with several optional ventilation functions.
References made in this manual to SIMV and PSVPro modes, are only applica­ble to systems equipped with these functions.

Ventilator controls include:

• Touch keys

•Menu screens

•A control knob

12

3

AB.90.025

4

5

11

10

9

78

12

1.Alarm silence (key)

2.Alarm message (display)

3.Volume alarms On/Off (key)

4.Menu key

5.Breathing circuit module (display)

6.Control knob

7.Control setting

8.Selection key

9.Ventilation mode (display)

10.Ventilator status (On or Off)

11.Mains indicator

12.End Case (key)

13.Measured values

Figure 2-6 • SmartVent controls and monitored data

All but two of the controls for the ventilator are located on the Ventilation/
Monitoring display. The two controls are:

6

2-12

1009-0632-000

2 System Controls and Menus

• The system switch, which powers the ventilator.

• The Bag/Vent switch, which starts and stops mechanical ventilation.

Item Description

Menu key Shows the main menu.

AB.90.036

Alarm silence key

Silences most alarms for 120 seconds.

and indicator

Pushing the key when no alarm is active pre-silences low
and medium priority alarms, except Minimum Monitoring,
for 90 seconds.

The "No O

Pressure" alarm cannot be silenced.

2

Remaining

silence time

Volume alarm key

Tur ns volume alarms on and off.

and status

Vol Alarms Off

End Case key End Case helps to prevent false alarms when no patient is

connected. It:

• Puts the apnea and volume alarms into Standby.

• Returns user selections to the most common
settings: Cardiac bypass off; Alarm limits shown.

• Sets the PEEP to 0 cmH

O (default value).

2

• Sets Plimit to one of two values: facility default or
40 cmH

O.

2

• Forces the circuit Leak Audio to On.

Mechanical ventilation must be off (set the Bag/Vent switch
to Bag or select the auxiliary common gas outlet).

AB.29.004

1009-0632-000

AB.29.006

2-13

Aespire 7900

How to set controls

Step 1

Push the selection key below
the setting.

Step 2

Turn the knob to change the
setting.

The bottom of the screen shows control settings.

Notes:

• The ventilator will not allow the setting of values it cannot supply. A reject
tone will sound or a message will appear on the screen.

• If the incorrect key is pushed, wait ten seconds or push the correct key.

• If the new setting is not saved, the ventilator continues to use the old
setting.

AB.29.010

AB.29.002

Step 3

Push the knob or the key to
save the change.

AB.29.011

2-14

1009-0632-000

2 System Controls and Menus

How to use the menu

Step 1

Push the Menu key to see
the main menu.

Step 2

Turn the knob to select an
option (highlight).

Screens go back to the normal display 25 seconds after the last action.

During a calibration or other procedure, the screen shows the instructions.

AB29.013

AB.90.036

Step 3

Push the knob to show the
next screen.

1009-0632-000

AB90.037

AB.90.045

2-15

Aespire 7900

AB.90.036

Menu map

Figure 2-6 shows the menu map. The table tells you about some of the
options.

SE

AB.90.041

AB.90.054

V

Note: If the Alarm Settings page shows

E

Auto Limits On during mechanical

ventilation, the system automatically calculates alarm limits.

Figure 2-7 • Menu map

AB.90.045

AB.90.063

2-16

1009-0632-000

More about menu

functions

Menu Option Function

2 System Controls and Menus

Main Cardiac Bypass

(In Progress/No)

Alarm Settings Circuit Leak

(Audio On/Off)

Setup/

SIMV/PSVPro Setup Shows additional ventilation settings for SIMV and PSVPro modes.

Calibration

O

Sensor Cal Shows menu for O

2

Inspiratory Pause Adds an inspiratory pause time to volume control breaths.

Heliox mode
(On/Off)

About Ventilator... Shows service level settings: software version; if facility defaults or the control

Screen and
Audio

Alarm Limits
(Show/Hide)

Tur ns off volume and apnea alarms when these are not appropriate (e.g., during
heart lung bypass).

Tur ns off the alarm tone for circuit leaks. You must set the low ◊

E

alarm first.
Select ‘Audio off’ if the circuit has a known leak (e.g., an uncuffed endotracheal
tube).

sensor calibration.

2

Tells the ventilator if heliox is in use.

settings from the previous case are used when the system is first turned on;
altitude; and drive gas (O

or Air).

2

’Show’ displays alarm limits next to the data on the screen.

Show Limits Hide Limits

Units of Measure
(Show/Hide)

’Show’ displays units under the data on the screen.

Show Units

Hide Units

1009-0632-000

2-17

Aespire 7900

How to change menu

settings

Step 1

Select the desired menu.

This example changes alarm limits.

The screen goes back to the normal display 25 seconds after the last action.

AB.90.038AB.90.054AB.90.055

Step 2

Tur n, then push the knob to
select an option.

Step 3

Turn the knob to change the
setting.

Step 4

Push the knob to save the
change.

75

82

82

82

2-18

1009-0632-000

2 System Controls and Menus

Optional auxiliary O

flowmeter and suction regulators

2

These options are available:

•Auxiliary O

flowmeter

2

•A continuous suction regulator or a venturi suction regulator

1

1. Auxiliary O

2. Auxiliary O

3. Auxiliary O

Figure 2-8 • Optional Auxiliary O

Flowmeter outlet

2

Flowmeter

2

flow control

2

Flowmeter and control

2

2

3

1. External vacuum (non-venturi)

2. Collection bottle connection

3. Filter

4. Overflow safety trap

Figure 2-9 • Optional Suction Regulator

1

2
3

4

1009-0632-000

2-19

Aespire 7900

Suction regulator

controls

Mode switch:
MAX: for maximum suction, set the switch to MMMMAAAAXXXX.
On (|): for adjustable suction, set the switch to on (|) or

|.

Off (O): to turn off suction, set the switch to O.
With the mode switch set to “|”, turn the control
clockwise to increase suction and counterclockwise to
decrease it.

Auxiliary flowmeter

control

The auxiliary flowmeter is not pressure compensated.

Turn the control counterclockwise to increase the O2 flow
and clockwise to decrease.

2-20

1009-0632-000

3 Operation and Tutorial

ww

ww

WARNING In addition to volume apnea and low airway pressure alarms,

other ventilator alarms are included to indicate potential hazard
conditions. All alarms that occur should be investigated to help
ensure adequate patient safety.

w Desiccated (dehydrated) absorbent material may produce

dangerous reactions when exposed to inhalation anesthetics.

w For systems with dual absorbent canisters, the carbon dioxide

absorbent material in both canisters shall be changed at least
weekly
systems the absorbent material shall be changed every day
preferably at the start of the day.

w Carbon dioxide absorbent material shall be changed whenever

users cannot assure the degree of hydration of the absorbent.
Such conditions may include finding a machine with fresh gas
that has been flowing for an unknown period of time, or using a
machine that is used infrequently.

w All fresh gas flows shall be terminated when the machine is NOT in

use. (User manuals describe how to achieve null flows).

w Users are advised to consider the use of low-flow techniques

when the machine is in use
maintain hydration of the absorbent material.

, preferably every Monday morning. For single canister

and whenever clinically appropriate to

,

1009-0632-000

3-1

Aespire 7900

In this section

This section describes specific tasks. Use it as a step-by-step guide or a
training tool.

Turn on the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Set the alarm loudness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Show or hide alarm limits and units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Turn the Volume Alarms on or off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Set alarm limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Set an audible alarm for circuit leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Set Cardiac Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11

Start mechanical ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Stop mechanical ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15

Set the ventilation mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Set ventilator controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Set SIMV and PSVPro controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-24

Silence alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-26

Reading the pressure waveform (Paw) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27

Measure circuit compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-30

Show the service settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-31

Measure circuit compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-33

3-2

1009-0632-000

3 Operation and Tutorial

Pre-use check list

Connect the power cord to a wall outlet.

Prior to each case check all the ventilator settings to ensure they are
appropriate for the patient.

1. Check that the mains electrical indicator is lighted.

2. Turn on the anesthesia system power switch. (If system power is already
ON, cycle the power switch OFF, then back ON to allow the system power­up self test to run.)

3. Unplug the system power cord from mains power.

4. Ensure the ventilator functions and indicates the use of battery backup
power.

5. Reconnect the system power cord to the system mains power.

6. Select the desired mode of ventilation.

7. Select the desired breathing circuit and ensure it is displayed to the right
of the selected ventilation mode above the pressure wave form.

8. Set the fresh gas flow.

9. Set V

, to the appropriate tidal volume value or Pinspired to the

T

appropriate level.

10. Set the breathing Rate.

11. Set I:E Ratio.

12. Set Plimit (Airway pressure limit).

13. Set PEEP.

14. Check and adjust alarm settings to ensure they are appropriate for the
ventilator settings and the case at hand.

15. Run the 21% Oxygen Sensor Calibration Check.

1009-0632-000

3-3

Aespire 7900

Turn On the system

Step 1

Connect the power cord to a wall outlet. The
mains indicator comes on when AC Power is
connected.

Step 2

Set the system switch to On (|).

AB.29.007

On

AA.96.104

Step 3

The display shows the power-up screen,
and the system does a series of self tests.

Step 4

When the self tests pass, the display shows
the normal screen.
If a test fails, the screen shows an alarm.
Refer to the troubleshooting section.

AB.90.021

3-4

1009-0632-000

Set the alarm loudness

Step 1

Select the Screen and Audio Setup menu.

• Push the menu key.

• Turn, then push the knob to select
Screen and Audio.

3 Operation and Tutorial

AB.29.013

AB.90.036

Step 2

Tur n, then push the knob to select alarm
loudness.

AB.90.039

AB.90.063

AB.90.043

1009-0632-000

3-5

Aespire 7900

Step 3

Tur n, then push the knob to adjust the
volume.

• The volume range is 1 to 5
(loudest).

• As the volume is changed, the
system sounds test tones.

• Push the knob to save the change.

2

Then

3-6

1009-0632-000

Show or hide alarm limits and units

To simplify the displays, hide alarm limits and units of measurement. If the
alarm limits are hidden, the screen automatically shows the limits when:

• An alarm occurs.

• Volume alarms are off or the auxiliary common gas outlet is selected
(monitoring off).

• An individual alarm limit is set to Off.

When the system is set to Standby, alarm limits go back to Show.

3 Operation and Tutorial

Step 1

Select the Screen and Audio Setup menu.

• Push the menu key.

• Turn, then push the knob to select
Screen and Audio Setup.

Show All

AB90.036

Hide Units Hide Alarm Limits

AB.90.033

1009-0632-000

AB90.039

3-7

Aespire 7900

Step 2

Tur n, then push the knob to select Alarm
Limits or Units of
Measure.

AB90.063

AB90.044

Step 3

Tur n, then push the knob to select Show or
Hide. Push the knob to save the change.

Show

Hide

Turn the volume alarms on or off

ww

WARNING Do not turn volume alarms off with a spontaneously breathing

ww

patient, the system will not alarm for low volume.

The volume alarm key (
alarms are off, a large X covers the limits.

Use this control to prevent false alarms if you switch to manual ventilation at
lower tidal volumes.

Then

E

TE

◊

/V

) turns volume alarms on and off. When the

3-8

AB.29.014

Use the End Case key (on control panel) to prevent apnea alarms between
patients.

1009-0632-000

Set alarm limits

AB

90

036

AB

90

038

AB

90

055

Step 1

Select the Alarm Settings menu.

• Push the menu key.

• Turn, then push the knob to select
Alarm Settings.

3 Operation and Tutorial

E

Note: If the Alarm Settings page shows
ventilation, the system is set to automatically calculate ◊

AB.29.013

.
.

◊

Auto Limits during mechanical

E

limits.

Step 2

Tur n, then push the knob to select a limit.

Step 3

Tur n, then push the knob to change the limit.

• Push the knob to save the change.

• The screen returns to the normal
display 25 seconds after the last
change.

.
.

AB.90.054

.
.

75

Then

1009-0632-000

3-9

Aespire 7900

Set an audible alarm for circuit leaks

The patient circuit leak alarm is activated if less than half of the inspired
volume returns through the expiratory flow sensor during mechanical
ventilation. To prevent nuisance alarms from a known leak (e.g., an un-cuffed
endotracheal tube), set the audio to Off. Normal volume and apnea
monitoring does not change.

Note: This alarm is the first stage in detecting a circuit disconnect. The audible
leak alarm cannot be turned off unless volume alarms are on, and the low
limit is set to a value other than off.

AB.29.013

◊◊

E

◊◊

Step 1

Select the Alarm Settings menu.

• Push the menu key.

• Turn, then push the knob to select
Alarm Settings.

AB.90.036

AB.90.038

3-10

1009-0632-000

3 Operation and Tutorial

Step 2

Tur n, then push the knob to select circuit
leak audio.

Step 3

Tur n, then push the knob to change the
setting. You must push the knob to save the
change.

Set Cardiac Bypass

AB.90.054AB.90.056

Audio On

Audio Off

Then

Set Cardiac Bypass to In Progress to prevent volume and apnea alarms when
the patient is on cardio-pulmonary bypass.

1009-0632-000

When Cardiac Bypass In Progress is selected, the display shows:

• Cardiac Bypass

• Apnea Alarm Off

• Vol Alarms Off

::

NNNNooootttteeee::

The mechanical ventilation must be off. When the mechanical
ventilation is turned back on, Cardiac Bypass returns to the No Bypass setting
and alarms become active.

3-11

Aespire 7900

Step 1

Select the Cardiac Bypass menu item:

• Push the menu key.

• Turn, then push the knob to select
Cardiac Bypass In Progress.

AB.90.036

AB.90.040

AB.29.013

Step 2

Push the knob again to return to No.

AB.90.068AB.90.040

3-12

1009-0632-000

Start mechanical ventilation

ww

ww

WARNING Make sure the patient circuit is correctly assembled and the

control settings are correct before you start ventilation.

This example assumes the system is on and in manual ventilation (bag) mode.

Step 1

Make sure the control settings are clinically appropriate.

Step 2

Set the ACGO switch to the circle system
position.

3 Operation and Tutorial

Step 3

Set the Bag/Vent switch to the Vent
position.

• This selects mechanical ventilation
(Vent).

• If mechanical ventilation is not
available, a message tells you
what to do. For example:

“To start mech vent set the Bag/
Vent switch to Bag and back to
Vent.”

Step 4

If necessary, inflate the bellows using the
O

flush button.

2

1009-0632-000

3-13

Aespire 7900

Stop mechanical ventilation

Step 1

Make sure a manual circuit is set up and
the APL valve setting is OK before stopping
mechanical ventilation.

70

M

I

N

This valve adjusts the breathing system
pressure limit during manual ventilation.
The scale shows approximate pressures.
Above 30 cm H

O, you will feel clicks as the

2

knob turns.

Step 2

Set the Bag/Vent switch to Bag position.

• This selects manual ventilation
(bag) and stops the mechanical
ventilation (ventilator).

Or:

30

20

(Setting is at about 20 cm H2O)

Select the ACGO and mechanical
ventilation will stop.

3-14

1009-0632-000

Alarms

3 Operation and Tutorial

Alarms appear at the top of the screen. The highest priority alarm is shown in
Area 1, the next highest priority alarm in area 2. If all areas are used, the
lowest priority alarms cycle in area 4.

Alarm Tones

Alarm Silence

Alarm Suspend

Alarm tones tell you about the alarm priority:

• High Priority: 2 bursts of 5 tones, every 10 seconds, (repeat)...

• Medium Priority: 3 tones every 25 seconds, (repeat)....

• Informational: single tone.

• The screen shows the time remaining in the silence period.

• If you push the alarm silence key while an alarm is silenced, countdown
time resets to 120 seconds:

120

• High priority alarms always cause an audible tone and must be silenced
individually.

Pressing and holding the alarm silence key for one second, when no alarms
are active, suspends audio tones for medium and low priority alarms for 90
seconds.

1009-0632-000

Refer to Part 2 of this manual for more information about alarms and
messages.

3-15

Aespire 7900

Set the ventilation mode

Text below the waveform shows the ventilation mode:

• Pressure controlled modes supply a set pressure during inspiration.

• Volume controlled modes supply a set tidal volume.

AB.90.092

Step 1

Select the Ventilation Mode.

• Push the menu key.

• Push the knob to select VVVVeeeennnnttttiiiillllaaaattttiiiioooonnnn
Mode.

Step 2

Tur n, then push the knob to change the
mode. Push the knob to save the change.

AB.29.013

AB.90.036

Volume Control

Pressure Cntrl

SIMV Mode

Then

PSVPro Mode

Note PSVPro is pressure supported ventilation with apnea backup.

3-16

1009-0632-000

Step 3

Set the highlighted control parameter. Each
mode has one parameter that must be set

for Volume and SIMV, Pinspired for

(VT
Pressure, and Psupport for PSVPro).

• Turn, then push the knob to set the
value.

• Until a value is set, the ventilator
shows “---”. If any other key is
pressed at this time, a tone will
sound.

AB.90.074

AB.90.075

3 Operation and Tutorial

Then

1009-0632-000 3-17

Aespire 7900

Set ventilator controls

Optional features The Aestiva 7900 can be equipped with several optional ventilation functions.

Step 1

Push the selection key.

References made in this manual to SIMV and PSVPro modes, are only
applicable to systems equipped with these functions.

The ventilator controls present are based on the ventilation mode.

Messages appear on the screen if:

• You try to set a value the system cannot supply.

• You change a setting but do not save it: "Push knob to confirm change
Turn knob to change setting".

AB.90.076

Step 2

A tone sounds and a box flashes around
the setting.

Step 3

Turn the knob to set the value.

Step 4

Push the knob to save the setting.

•A tone sounds.

• The flashing stops.

Ventilator controls

AB.90.077

AB.90.078

AB.90.079

Flow Trigger Level This parameter sets the minimum flow detected by the ventilator which

triggers the ventilator to deliver a mechanical breath to a spontaneously
breathing patient. Only active in SIMV and PSVPro modes.

3-18 1009-0632-000

3 Operation and Tutorial

I:E This control sets the inspiratory to expiratory ratio of mechanical breaths

supplied to the patient.

Insp. Termination Level This parameter sets the percentage of the peak inspiratory flow where the

ventilator stops a pressure supported breath. Only active in SIMV and PSVPro
modes.

PEEP This control sets the positive end expiratory pressure. This is only available

during mechanical ventilation, but the control can be set at any time.

ww

ww

WARNING Do not use a separate mechanical PEEP valve; incorrect operation

and patient injury can result.

Pinspired

This control sets the amount of pressure delivered to the patient in each
pressure controlled breath.

Plimit This control sets the maximum (and sustained) airway pressures tolerated in

the patient’s breathing system.

• If the high airway pressure limit is reached, inspiration stops and
exhalation starts.

• The limit is an absolute value. There is no offset for PEEP pressure.

Note: Pmax is the peak sensed airway pressure; Plimit is the airway pressure
limit set with front panel controls.

Psupport This control sets the delivered pressure during pressure support ventilation.

Only active in SIMV and PSVPro modes.

Rate This control permits you to set the frequency of mechanical breaths delivered

to the patient. It also establishes the apnea delay time in the PSVPro mode.

Tinspired This control sets the time in seconds for each timed inspiration. Only active in

SIMV and PSVPro modes.

Trigger Window This control sets the range as a percent of the exhalation phase within which

the patient may trigger the next mechanical breath. Only active in SIMV and
PSVPro modes.

VT This control sets the tidal volume delivered to the patient in the Volume

Control and SIMV modes.

Volume Control mode The figure and table below show Volume Control settings.

1009-0632-000 3-19

Aespire 7900

Settings VT Rate I:E Plimit PEEP

Range 20 - 1500 4 - 100 2:1 - 1:8 12 - 100 Off, 4 - 30

Increments varies

Increments of 1mL from 20 to 50, 5 mL from 50 to 100, 10 mL from 100 to 300,

*

25 mL from 300 to 1000, 50 mL from 1000 to 1500

1 bpm 0.5 1 cmH2O 1 cmH2O

*

Pressure Control mode The figure and table below show Pressure Control settings.

Settings Pinspired Rate I:E Plimit PEEP

Range 5 - 60 4 -1 00 2:1 - 1:8 12 - 100 Off, 4 - 30

Increments 1 cmH2O 1 bpm 0.5 1 cmH2O 1 cmH2O

SIMV mode The figure and table below show SIMV settings.

Settings VT Rate Tinspired Psupport PEEP

Range 20 -1500 2 - 60 0.2 - 5.0 Off, 2-40 Off, 4 - 30

Increments varies

Increments of 1mL from 20 to 50, 5 mL from 50 to 100, 10 mL from 100 to 300, 25

*

mL from 300 to 1000, 50 mL from 1000 to 1500

1 bpm 0.1 s 1 cmH2O 1 cmH2O

*

PSVPro mode PSVPro is pressure supported ventilation with apnea backup.

The figure below shows PSVPro settings. In this mode the Pinspired, Rate, and
Tinspired parameters are not active, but they may be changed.

3-20 1009-0632-000

3 Operation and Tutorial

During backup ventilation, the ventilator will ventilate the patient using the
SIMV-PC + PSV mode. All parameters shown are active in this mode.

Settings Pinspired Rate Tinspired Psupport PEEP

Range 5 - 60 2 - 60 0.2 - 5.0 Off, 2-40 Off, 4 - 30

Increments 1 cmH2O 1 bpm 0.1 s 1 cmH2O 1 cmH2O

1009-0632-000 3-21

Aespire 7900

Set inspiratory pause

(volume modes)

You can only use inspiratory pause in Volume Control or SIMV modes. In
pressure modes, Inspiratory Pause displays a message “No Pause w”.

When Pause is on, the inspiratory volume stays in the patient’s lungs for the
set pause time at the end of inspiration.

Pause can be set from Off to 60 percent of inspiratory time in increments of
five percent. Minimum pause time is 400 ms.

Pause

AB.90.092

Exp.Insp.

Step 1

Select the Setup/Calibration menu.

• Push the menu key.

• Turn, then push the knob to select
the Setup/Calibration menu.

AB.29.013AB.90.036

AB.90.037

3-22 1009-0632-000

Step 2

Tur n, then push the knob to select
Inspiratory Pause.

Step 3

Tur n, then push the knob to change the
setting. You must push the knob to save the
change.

AB.90.083

20% of TI

3 Operation and Tutorial

Then

1009-0632-000 3-23

Aespire 7900

Set SIMV and PSVPro controls

The SIMV and PSVPro modes allow the user to set additional ventilator
controls. The Pinspired, Rate, Tinspired, Psupport and PEEP controls can be
set using the selection keys. The Plimit, Trigger Window, Flow Trigger Level,
and Inspiratory Termination Level may be set through the Setup/Calibration
menu.

AB.29.013AB.90.036

Step 1

Select the SIMV/PSVPro Setup menu.

• Push the menu key.

• Turn, then push the knob to select
Setup/Calibration.

Step 2

Push the knob to select SIMV/PSVPro
Setup.

wWARNING Most anesthetic agents will cause patients to have reduced ventilatory

responses to carbon dioxide and to hypoxemia. Therefore, triggered modes of
ventilation may not produce adequate ventilation.

wWARNING The use of neuromuscular blocking agents will reduce the patient’s breathing

response, which will interfere with triggering.

AB.90.037

AB.90.045

3-24 1009-0632-000

Step 3

Tur n, then push the knob to select a setting.

Step 4

Tur n, then push the knob to change the
setting. You must push the knob to save the
change.

3 Operation and Tutorial

AB.90.073

40

Then

1009-0632-000 3-25

Aespire 7900

Silence alarms

The alarm silence key silences current alarms for 120 seconds. When no
alarm is active, holding down the alarm silence key for one second pre­silences low or medium priority alarms for 90 seconds. Minimum monitoring
cannot be pre-silenced.

• The screen shows the time remaining in the silence period.

• Pushing the alarm silence key while an alarm is silenced will reset the
countdown time to 120 seconds.

• High priority alarms always cause an audible tone and must be silenced
individually.

AB.29.004

Alarm tones identify the alarm priority:

• High Priority: 10 tones, 10 seconds pause, (repeat)....

• Medium Priority: 3 tones, 25 seconds pause, (repeat)....

• Low Priority: single tone.

Alarms appear at the top of the screen. The highest priority alarm will be
shown in Area 1, the next highest priority alarm in area 2. If all areas are used,
the lowest priority alarms cycle in area 4.

AB.90.072

Note: Error mode messages may appear. Refer to ’Alarms and
Troubleshooting’ in Part 2 of the Operation Manual for more information.

• Minimum Monitoring: Monitoring data is available but a failure prevents
mechanical ventilation.

• Minimum System Shutdown: Monitoring and ventilation are not possible.

3-26 1009-0632-000

Reading the pressure waveform (Paw)

Different points on the waveform are instantaneous values for measured
pressures. The horizontal axis indicates the time scale for the rate, I:E ratio,
and inspiratory pause (volume control setting). The vertical axis indicates the
pressure.

AB.90.060

3 Operation and Tutorial

Volume Control Mode

Pmean

Pmax

PEEP

Pressure Control Mode

Pinsp

Pmax

AB.90.057

PEEP

Scales The display automatically adjusts time and pressure scales to fit the control

settings.

The time scale changes with the set Rate:

• 25 or less breaths per minute - time scale is 0 to 16 seconds

• 26 to 75 breaths per minutes - time scale is 0 to 8 seconds

• 76 or more breaths per minutes - time scale is 0 to 4 seconds

• On a change, existing pressure data is erased and new waveform data
starts at time = 0.

The pressure scale changes with the Plimit setting:

• 12 to 40 Plimit, y-axis range is -5 to 40

• 41 to 60 Plimit, y-axis range is -5 to 60

• 61 to 100 Plimit, y-axis range is -5 to 100

•When the pressure scale changes, existing pressure data is erased and
new waveform data starts at time = 0.

1009-0632-000 3-27

Aespire 7900

Example Volume Control • PEEP: Off

• Maximum sensed inspiratory pressure (Pmax): 25

• Mean positive airway pressure (Pmean): 11

AB.90.004

Figure 3-1 • Paw waveform in Volume Control mode

Example Pressure Control •Pmax: 34

• Upper pressure limit (Plimit): 40

• PEEP: 10

Figure 3-2 • Paw waveform in Pressure Control mode

AB.90.002

3-28 1009-0632-000

Example SIMV • Plateau pressure (Ppl): 15

• Inspiratory time (Tinspired): 1.5

• Inspiratory Pause: 60

Figure 3-3 • Paw waveform in SIMV mode.

3 Operation and Tutorial

AB.90.028AB.90.087

Example PSVPro • PEEP: 5

• Pressure support: 10

• Mean positive airway pressure (Pmean): 7

Figure 3-4 • Paw waveform in PSVPro mode.

1009-0632-000 3-29

Aespire 7900

Measure circuit compliance

To measure compressible volume in patient tubes:

1. Set the ventilator to volume control mode.

2. Set a tidal volume (V

) of 500 mL

T

3. Set a rate of 10 breaths/min.

4. Set an I:E ratio of 1: 1

5. Set the Plimit control to 30 cmH

O.

2

6. Occlude the patient connection of the Y piece. Do not contaminate a
clean patient connection.

7. Turn on mechanical ventilation.

8. Monitor the exhaled tidal volume V

and P

TE

(measured peak airway

max

pressure).

measures the gas needed to fill the patient circuit at the measured

The V

TE

pressure.

The example shows how tubing compliance factor can be calculated.

/(P

V

TE

–2.51 cmH2O) = Compliance factor in mL per cmH2O

max

Example:

= 21 cmH2O

P

max

= 24 mL

V

TE

24/(21–2.5) = 1.3 mL/cmH

O

2

This factor can be used to calculate the approximate gas compression in
patient tubes.

For example, if the patient is requiring 30 cmH

O to ventilate,

2

30 X 1.3 = 39 mL of gas is compressed in the tubes each breath. This gas
(39 mL) is part of the set tidal volume but it does not reach the patient.

1

Force of the Bellows.

3-30 1009-0632-000

Show the service settings

The About Ventilator screen shows ventilator settings that can only be
changed by an approved service representative.

3 Operation and Tutorial

Item Use

Software Version If you call for service, a representative may ask for this.

Step 1

Select the Setup/Calibration menu.

• Push the menu key.

• Turn, then push the knob to
select Setup/Calibration.

Facility defaults or last
settings

Altitude Used for gas calculations. If the altitude is not correct,

Drive gas (O2 or Air) Tells you which gas the ventilator uses to drive the

AB.29.013

AB.90.036

Tells you if the system saves the current settings when
you turn it off or goes back to facility defaults.

O2 calibration can fail.

bellows. This gas comes from the same supply (pipeline
or cylinder) that the anesthesia machine uses. If this gas
comes from a cylinder, the cylinder empties faster than
you would expect from the flowmeter settings.

AB.90.037

1009-0632-000 3-31

Aespire 7900

Step 2

Tur n, then push the knob to select
About Ventilator.

AB.90.045

AB.90.047

AB.90.051

3-32 1009-0632-000

Measure circuit compliance

To measure compressible volume in patient tubes:

1. Set the ventilator in volume control mode.

3 Operation and Tutorial

2. Set a tidal volume (V

) of approximately 500 mL

T

3. Set a rate of 10 breaths/min.

4. Set an I:E ratio of 1:1.

5. Set the P

control to 20 cm H2O.

limit

6. Occlude the patient connection of the wye piece. Do not contaminate a
clean patient connection.

7. Turn on mechanical ventilation.

8. Monitor the exhaled tidal volume V

and P

TE

(measured peak airway

max

pressure).

The V

measures the gas needed to fill the patient circuit at the measured

TE

pressure.

The example shows how tubing compliance factor can be calculated.

11

V

/(P

TE

max

11

–2.5

cm H2O) = Compliance factor in mL per cm H2O

Example:

= 20 cm H2O

P

max

= 24 mL

V

TE

24/(20–2.5) = 1.4 mL/cm H

O

2

This factor can be used to calculate the approximate gas compression in
patient tubes. For example, if the patient is requiring 30 cm H2O to ventilate,
30 X 1.4 = 42 mL of gas is compressed in the tubes each breath. This gas (42
mL) is part of the displayed tidal volume but it does not reach the patient.

11

11

Force of the bellows.

1009-0632-000 3-33

Aespire 7900

3-34 1009-0632-000

4 Preoperative Tests

In this section

Aespire 7900 Preoperative tests schedules . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Inspect the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Power failure alarm test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Minimize alarms (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Pipeline and cylinder tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Flow control tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Vaporizer installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Vaporizer back pressure test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

Low-pressure leak test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11

Alarm tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14

Breathing system tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

Monitor and ventilator tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-18

1009-0632-000

4-1

Aespire 7900

Aespire 7900 Preoperative tests schedules

Test Intervals

Test intervals

Test the system:

Do the Preoperative tests listed below at these events:

1. Every day before the first patient.

2. Before each patient.

3. When required after a maintenance or service procedure.

The following table indicates when a test must be done and gives a page
number location where the test can be found.

Every day
before the
first patient

Inspect the system: 4-4

Power failure alarm test: 4-5

Minimize alarms (optional): 4-5

Pipeline and cylinder tests: 4-6

Flow control tests: 4-7

Vaporizer installation: 4-11

Vaporizer back pressure test: 4-12

Before
every
patient

Low-pressure leak test:

Negative low-pressure leak test: 4-13 4-13

ISO 5358 or BSI standard positive low-pressure leak test: 4-15 4-15

Alarm tests: 4-16

Breathing system tests: 4-18 4-18

Monitor and ventilator tests: 4-20 4-20

4-2

1009-0632-000

4 Preoperative Tests

ww

ww

WARNING Do not use this system unless you have read each component’s

operation and maintenance manual and understand:

• All system connections

• All of the warnings and cautions

• How to use each system component

• How to test each system component

Before you use this system:

• Complete all of the tests in this section

• Test all other system components

Test devices

If a test failure occurs, do not use the equipment. Have an
approved service representative repair the equipment.

The following test tools are needed for some of the tests.

Datex-Ohmeda

Item

Positive pressure leak test device (BSI, 25 kPa) 1001-8975-000

Positive pressure leak test device (ISO 5358, 4 kPa) 1001-8976-000

Positive pressure leak test adapter 1009-3119-000

Negative pressure leak test device 0309-1319-800

Test lung 0219-7210-300

Stopper, test plug, red silicone, nominal 17 mm and 22 mm 2900-0001-000

Ref.

1009-0632-000

4-3

Aespire 7900

Inspect the System

ww

ww

WARNING Make sure that the breathing circuit is correctly connected and not

ww

ww

WARNING The upper shelf weight limit is 34 kg (75 lb).

damaged.

Make sure that:

ww

ww

WARNING Do not leave gas cylinder valves open if the pipeline supply is in

1. The equipment is not damaged.

2. All components are correctly attached.

3. The breathing circuit is correctly connected, not damaged, and the
breathing system contains sufficient absorbent.

4. The vaporizers are locked in position and contain sufficient agent.

5. Pipeline gas supplies are connected and the pressures are correct.

6. Cylinder valves are closed on models with cylinder supplies.

use. Cylinder supplies could be depleted, leaving an insufficient
reserve supply in case of pipeline failure.

7. Models with cylinder supplies have a cylinder wrench attached to the
system.

8. The necessary emergency equipment is available and in good condition.

9. Equipment for airway maintenance, tracheal intubation, and IV
administration is available and in good condition.

4-4

10. Applicable anesthetic and emergency drugs are available.

11. If the optional O
present, the system O
connected and the system switch in the standby position:

• The O

• The suction regulator provides adequate suction.

12. Make sure the casters are not loose and the brake(s) is set and prevents
movement.

flowmeter and suction regulator are

2

and vacuum source must be

2

flowmeter provides adequate flow.

2

1009-0632-000

Power failure alarm test

4 Preoperative Tests

13. Connect the power cord to a wall outlet. The mains indicator comes on
when AC Power is connected.

• If the indicator is not on, the system does not have mains (electrical)

power. Use a different outlet. Close the circuit breaker or replace or
connect the power cable. Refer to Figure 2-2.

1. Set the system switch to On.

2. Unplug the power cord with the system turned on.

3. Make sure that the power failure alarm (audio tone and “On Battery -

4. Connect the power cord again.

5. Make sure the alarm cancels.

6. Set the system switch to Standby.

Minimize alarms (optional)

Set the ventilator controls to decrease the number of alarms:

1. Set the system switch to On.

2. Control Keys:

Power OK?” message on the display) comes on.

• Volume alarms: Off.

1009-0632-000

3. Alarm menu:

• Low O

• High O

4. Bag/Vent switch:

• Bag

: 21%

2

: Off.

2

4-5

Aespire 7900

5. Set the system switch to Standby.

Pipeline and cylinder tests

ww

ww

CAUTION To prevent damage:

• Open the cylinder valves slowly.

• Do not force the flow controls.

If your system does not use cylinder supplies, do not do steps 2 through 12.

1. Disconnect the pipeline supplies and close all cylinder valves.

2. Make sure that the cylinders are full:

If the pipeline and the cylinder pressure gauges are not at zero:

• Connect an O

supply.

2

• Set the system switch to On, if it is not already

set.

• Set the flow controls to mid range.

•Make sure that all gauges but O

• Disconnect the O

•Make sure that the O

alarms for low O

supply.

2

gauge goes to zero. As pressure decreases,

2

supply pressure should occur.

2

go to zero.

2

• Open each cylinder valve.

•Make sure that each cylinder has sufficient pressure. If not, close the

applicable cylinder valve and install a full cylinder.

4-6

3. Test one cylinder at a time for high pressure leaks.

4. Set the system switch to Standby, which stops the O

5. Turn OFF the auxiliary O

flowmeter.

2

flow.

2

6. Turn off the suction.

7. Open the cylinder.

8. Record the cylinder pressure.

9. Close the cylinder valve.

10. Record the cylinder pressure after one minute. If the pressure decreases
more than 690 kPa (100 psig) there is a leak.

1009-0632-000

4 Preoperative Tests

• If there is a leak, install a new cylinder gasket and tighten the tee

handle as shown in “How to install gas cylinders (high pressure leak
test)” of the section ‘1 Setup and Connections’ in Part 2 of this
manual.

• Do this step again. If the leak continues, do not use the system.

11. Repeat steps 7 through 10 for all cylinders.

12. Close cylinder valves.

ww

ww

CAUTION Do not leave gas cylinder valves open if the pipeline supply is in

use. Cylinder supplies could be depleted, leaving an insufficient
reserve supply in case of pipeline failure.

13. Connect the pipeline supplies.

14. Set the system switch to On.

Flow control tests

ww

ww

WARNING The Link system cannot replace an O

15. Use this chart to check pipeline pressure:

ANSI (USA and Intl.), Australian, Canadian, French, Japanese 345 kPa (50 psig)
ISO, Italian, South African, Spanish, Swiss 414 kPa (60 psig)
Austrian, German 500 kPa (75 psig)

16. Set the system switch to Standby.

monitor. Sufficient O

2

in the

2

fresh gas may not prevent hypoxic mixtures in the breathing
circuit.

• Nitrous oxide (N

O), if available, flows through the system

2

during this test. Use a safe and approved procedure to collect
and remove it.

1009-0632-000

• Incorrect gas mixtures can cause patient injury. If the Link
system does not supply O

and N

2

O in the correct proportions,

2

do not use the system.

4-7

Aespire 7900

Important Test the O

To do the flow control tests:

1. Connect the pipeline supplies or slowly open the cylinder valves.

2. Turn all flow controls fully clockwise (minimum flow).

3. Set the system switch to On.

4. Do not use the system if low battery or other
ventilator failure alarms occur.

monitor as described in Alarm tests, step 8, before continuing.

2

ww

ww

WARNING

5. Make sure the O

flowtube shows approximately

2

.025 to .075 L/min. (0.200 L/min. for single-tube variants). The other
flowtubes must show no gas flow.

• Steps 6 and 7 are only for systems with

N

O.

2

Keep the Link system engaged during steps 6 and 7:

• Adjust only the test control (N

O in step 6 and O

2

2

in

step 7).

• Test the flows in sequence (N

• The O

sensor used in steps 6 and 7 must be correctly

2

O then O

2

).

2

calibrated.

6. Test the Link 25 system with flow increasing:

• Turn the N

O and O

2

• Slowly turn the N

•Make sure that the O

concentration must be

flow controls fully clockwise (minimum flow).

2

O flow control counterclockwise.

2

flow increases. The measured O

2

2

≥ 21% through the full range.

4-8

7. Test the Link 25 system with flow decreasing:

• Set the N

• Set the O

• Slowly turn the O

•Make sure that the N

concentration must be

O flow to 9.0 L/min.

2

flow to 3 L/min or higher.

2

flow control clockwise.

2

O flow decreases. The measured O

2

≥ 21% through the full range.

2

8. Adjust the flow of all gases through their full range and make sure that the
flowtube floats move smoothly.

9. Disconnect the O

pipeline supply or close the O

2

cylinder valve.

2

10. Make sure that:

• The low O

O, and O

•N

2

supply alarm occurs.

2

flows stop. The O

2

flow stops last.

2

• Air flow continues.

1009-0632-000

4 Preoperative Tests

Vaporizer installation

ww

ww

WARNING Use only the Selectatec series vaporizers Tec 4 or greater.

• Gas supply alarms occur on the ventilator if the ventilator uses O

the drive gas.

11. Turn all the flow controls fully clockwise (minimum flow).

12. Reconnect the O

13. Set the system switch to Standby.

pipeline supplies or open the O

2

cylinder valve.

2

2

Do not use a vaporizer that lifts off the manifold when the lock
lever is in the locked position.

Do not use this anesthesia system if you can turn ON more than
one vaporizer at the same time.

as

Tec 6 Plus Vaporizers will not align correctly unless the power
cable goes through the channel on the bottom of the vaporizer. Do
not put the power cable on top of the manifold or between
vaporizers.

1. If the top of a vaporizer is not horizontal, remove the vaporizer and
reinstall it.

2. Set each vaporizer lock lever to the locked position.

3. Try to lift each vaporizer straight up off the manifold rather than pulling
forward. Do not rotate the vaporizer on the manifold.

4. If a vaporizer lifts off the manifold, install it again and complete steps 1,
2, and 3. If the vaporizer lifts off a second time, do not use the system.

5. With a Tec 6 Plus Vaporizer:

•Make sure that the vaporizer is connected to an electrical outlet.

• Hold down the alarm silence switch for a minimum of four seconds.

•Make sure all indicators turn on and the alarm speaker starts.

• Release the alarm silence switch.

• Do not continue until the operational indicator turns on. The

concentration control will not turn if the operational indicator is OFF.

1009-0632-000

6. Try to turn on more than one vaporizer at the same time:

4-9

Aespire 7900

• Test each possible combination.

• If more than one vaporizer turns on at the same time, remove the

Vaporizer back pressure test

ww

ww

WARNING Anesthetic agent comes out of the common gas outlet during this

test. Use a safe, approved procedure to remove and collect the
agent.

ww

ww

CAUTION To prevent damage, turn the flow controls fully clockwise

(minimum flow or OFF) before you turn On the system.

vaporizers, install them again, and complete steps 1 through 6.

1. Set the system switch to on. Alarms can occur.

2. Set the O

3. Make sure that the O

flow to 6 L/min.

2

flow stays constant and

2

the float moves freely.

4. Adjust the vaporizer concentration from 0 to 1% one click at a time. The
O

flow must not decrease more than 1 L/min through the full range. If

2

the O

flow decreases more than 1 L/min:

2

• If O

flow decreases more than 1 L/min, then install a different

2

vaporizer and try this step again.

• If the O

flow decreases less than 1 L/min with a different vaporizer,

2

the malfunction is in the first vaporizer.

• If the O

flow also decreases more than 1 L/min with a different

2

vaporizer, the malfunction is in the anesthesia system. Do not use
the system until it is serviced.

5. Complete steps 3 and 4 for each vaporizer.

6. Set the system switch to Standby.

4-10

1009-0632-000

Low-pressure leak test

wwwwWARNING Do not use a system with a low-pressure leak. Anesthetic gas will

4 Preoperative Tests

go into the atmosphere, not into the breathing circuit.

Perform either the Negative low-pressure leak test or the ISO 5358 or BSI
standard positive low-pressure leak test. It is not necessary to perform both
types of tests.

Negative low-pressure

leak test

1. Set the System switch to Standby.

2. Turn on the auxiliary common gas
outlet (switch in the ACGO
position).

3. Test the negative pressure leak test device. (Ref.
0309-1319-800):

• Remove all air from the bulb.

• Put your hand on the inlet of the leak test device. Push hard for a

good seal.

• If the bulb inflates in less than 60 seconds,

replace the leak test device.

1009-0632-000

4. Turn off all vaporizers.

5. Test the anesthesia machine for low-pressure leaks:

• Turn the flow controls one and a half turns counterclockwise.

• Connect the test device to the auxiliary gas outlet.

• Compress and release the bulb until it is empty.

• The vacuum causes the floats to move. This is usual. If the bulb

inflates in 30 seconds or less, there is a leak in the low-pressure

4-11

Aespire 7900

circuit. Refer to the “Pneumatic problems” table in “Alarms and
Troubleshooting” of Part 2 of this manual).

• Disconnect the test device.

6. Test each vaporizer for low-pressure leaks:

• Set the vaporizer to 1%.

• Repeat step 5. If there is a low pressure leak, refer to Part 2 of this

manual.

7. Keep the test device with the system.

8. Turn all flow controls fully clockwise (minimum flow). Do not over tighten.

wwwwWARNING Agent mixtures from the low-pressure leak test stay in the system.

Always flush the system with O

after the low-pressure leak test (1

2

L/min for one minute).

wwwwWARNING Turn off all vaporizers at the end of the low-pressure leak test.

9. Flush the system with O2:

• Set the system switch to on.

• Set the O2 flow to 1 L/min.

• Continue the O2 flow for one

minute.

• Turn the O2 flow control fully clockwise (minimum flow).

• Set the system switch to Standby.

4-12 1009-0632-000

ISO 5358 or BSI

standard positive

low-pressure

leak test

wwwwCAUTION Do a positive pressure leak test at the ACGO port only.

1. Connect the leak test device to the
ACGO port with the positive pressure
leak test adapter.
the ACGO port throughout the test to get
a good seal.

• Test device ref:

1001-8976-000 (4 kPa);
1001-8975-000 (25 kPa);
1009-3119-000 (Adapter).

Push the adapter into

4 Preoperative Tests

2. Turn on the auxiliary common gas outlet (switch in the ACGO position).

3. Turn all controls fully clockwise (minimum flow).

4. Fully open the needle valve on the test device.

• Keep the test device flow tube vertical for accurate results.

wwwwCAUTION If the needle valve is not fully open, this test can damage the

pressure gauge on the test device.

5. Open the O2 flow control and set a total flow of 0.4 L/min through the
flowmeter on the test device.

6. Make sure that the pressure gauge on the test device reads zero and that
all other flow controls are fully closed.

7. Close the needle valve on the test device until the test gauge reads:

• BSI: 20 kPa (2.9 psi)

• ISO 5358: 3 kPa (0.4 psi)

8. If the flow through the test device is less than 0.35 L/min (ISO) or 0.3 L/
min (BSI), there is a low pressure leak in the anesthesia machine. Refer to
Part 2 of this manual.

1009-0632-000 4-13

Aespire 7900

9. Repeat this low-pressure leak test for each vaporizer:

• Set the applicable vaporizer to 1% and do steps 2 through 8.

• Fully open the needle valve on the test device to decrease the back

pressure.

• Turn the vaporizer off.

wwwwWARNING Agent mixtures from the low-pressure leak test stay in the system.

Always flush the system with O

after the low-pressure leak test (1

2

L/min for one minute).

Turn all vaporizers off at the end of the low-pressure leak test.

10. Remove the adapter and leak test device.

11. Flush the system with O2:

• Set the O2 flow to 1 L/min and continue flow for one minute.

• Turn the O2 flow control fully clockwise (minimum flow).

• Set the system switch to Standby.

Alarm tests

1. Connect a test lung to the patient connection.
Test device ref. 0219-7210-300.

2. Set the Bag/Vent switch to Vent.

3. Set the system to On.

4. Set the controls:

Ventilation Mode: Volume control (Select from main menu)
Ventilator: Tidal Vol: 400 ml

Rate: 12
I:E Ratio: 1:2

P

: 40 cm H2O

limit

PEEP: Off

Anesthesia Machine: O2 flow: minimum flow (25-75 mL/min) (about 200 mL

for single-tube variant)
All other gases: OFF
Push flush to fill the bellows.

4-14 1009-0632-000

4 Preoperative Tests

5. Turn the Bag/Vent switch to Bag and back. Make sure that:

•Mechanical ventilation starts.

•A subatmospheric pressure alarm does not occur.

• The ventilator displays the correct data.

• The bellows inflate and deflate during mechanical ventilation.

6. Set the O2 flow control to 5 L/min.

7. Make sure that:

• The end expiratory pressure is approximately 0 cm H2O.

• The ventilator displays the correct data.

• The bellows inflate and deflate during mechanical ventilation.

8. Test the O

monitor and alarms:

2

• Remove the O2 sensor and make sure the sensor measures

approximately 21% O

in room air.

2

• Set the low O2 alarm to 50% and make sure a low O2 alarm occurs.

• Set the low O2 alarm back to 21% and make sure that alarm cancels.

• Put the O2 sensor back in the circuit.

• Set the High O2 alarm to 50%.

• Push the flush button to fill the breathing system.

•Make sure the high O2 alarm comes on.

• Set the high O2 alarm back to 100% and make sure that alarm

cancels.

• After 2 minutes in pure O2, make sure that the sensor measures

approximately 100% O

.

2

9. Test the low minute volume alarm:

• Go to the alarms menu.

• Set the alarm limit for low minute volume to 6.0 L/min.

•Make sure that a low minute volume alarm occurs.

• Go to the alarms menu.

• Set the low minute volume alarm to Off.

10. Test the high airway pressure alarm:

• Set P

to less than the peak airway pressure.

limit

•Make sure that the high airway pressure alarm occurs.

• Set P

back to 40.

limit

11. Test the apnea and low airway pressure alarms:

• Remove the test lung from the patient connection.

• Other alarms such as low minute volume can occur.

•Make sure that the low airway pressure and apnea alarms occur. The

apnea alarm occurs after 30 seconds.

12. Test the sustained airway pressure alarm:

1009-0632-000 4-15

Aespire 7900

Breathing system tests

• Set the controls:

APL Valve: 70

Bag/Vent switch: Bag

•Mechanical ventilation stops when the Bag/Vent switch is set to

Bag.

• Close the patient connection and push the O2 Flush button.

•Make sure that the sustained pressure alarm occurs after

approximately 15 seconds at the sustained pressure limit (6-30 cm
H

O varies with pressure limit).

2

13. Set the system to Standby.

Refer to the applicable operation manuals. At a minimum:

1. Make sure that the auxiliary equipment (humidifier, etc.) operates
correctly.

2. Make sure that the check valves on the breathing circuit module work
correctly:

• The Expiratory check valve (1) rises during expiration and falls at the

start of inspiration.

• The Inspiratory check valve (2) rises during inspiration and falls at the

start of expiration.

1

2

4-16 1009-0632-000

4 Preoperative Tests

wwwwWARNING Objects in the breathing system can stop gas flow to the patient.

This can cause injury or death:

Do not use a test plug that is small enough to fall into the
breathing system.

3. Ventilator bellows test:

• Set the system switch to Standby.

• Set the Bag/Vent switch to Ventilator.

• Set all flow controls to minimum.

• Close the breathing circuit at the patient connection. Use your hand

or the test plug.

• Push the O2 flush button to fill the bellows.

• The pressure must not increase to more than 15 cm H2O on the

pressure gauge.

• If the bellows falls lower than the

top of the indicator, it has a leak.
a single-tube variant, the bellows
should not fall at all. Refer to the
troubleshooting procedure in the
Part 2 of this manual.

On

4. Test the Bag circuit for leaks:

• Set the system switch to On.

• Set the Bag/Ventilator switch to

Bag.

• Plug the Bag port; use your hand or the approved test plug.

• Close the APL valve (70 cm H2O).

• Set the O2 flow to 250 mL/min.

• Close the patient connection using a hand or test plug on the

breathing system and pressurize the bag with the O
approximately 30 cm H

O.

2

flush button to

2

• Release the flush button. The pressure must not decrease. A

pressure decrease large enough to see on the gauge indicates a
leak. Look for and repair the breathing circuit leak.

5. Test the APL valve:

• Fully close the APL valve (70 cm H2O).

• Set the total fresh gas flow to approximately 3 L/min and make sure

that the value on the inspiratory pressure gauge does not exceed 85
cm H

O. Some pressure fluctuation is normal.

2

• Fully open the APL valve (to the MIN position).

• Set O2 flow to 3 L/min. Turn any other gases off.

1009-0632-000 4-17

Aespire 7900

•Make sure that the value on the inspiratory pressure gauge is less

• Push the O2 flush button. Make sure that the value on the inspiratory

• Set the O2 flow to minimum and make sure that the value on the

6. Remove your hand or the test plug from the patient connection.

7. Set the System switch to Standby.

wwwwWARNING Make sure that there are no test plugs or other objects caught in

the breathing system.

Monitor and ventilator tests

1. Connect a test lung to the patient connection.

2. Set the Bag/Ventilator switch to Bag.

than approximately 5 cm H

O.

2

pressure gauge stays near zero.

inspiratory pressure gauge does not decrease below 0 cm H

O.

2

3. Set the System switch to On.

4. Set the controls:

Ventilation Mode: Volume control (Select from main menu)
Ventilator: Tidal Vol: 400 ml

Rate: 12
I:E Ratio: 1:2

P

: 40 cm H2O

limit

PEEP: Off

Anesthesia Machine: O2 flow: minimum flow)

All other gases: OFF

5. Set the Bag/Vent switch to Ventilator.

6. Push the O2 flush button to fill the bellows.

7. Make sure that:

•Mechanical ventilation starts.

•A subatmospheric pressure alarm does not occur.

Note: With active gas scavenging, too much scavenging flow can
cause subatmospheric alarms.

• The ventilator displays the correct data.

• The bellows inflate and deflate during mechanical ventilation.

8. Set the O2 flow control to 5 L/min.

9. Make sure that:

• The end expiratory pressure is approximately 0 cm H2O.

Note: Positive end expiratory pressure when PEEP is off may indicate
that the scavenging system is not removing enough gas.

4-18 1009-0632-000

4 Preoperative Tests

• The ventilator displays the correct data.

• The bellows inflate and deflate during mechanical ventilation.

10. Set the ventilator controls and alarm limits to clinically appropriate levels.

11. If the system will not be used immediately, set the System switch to
Standby and close all cylinder valves.

12. Make sure that you have:

Equipment for: Airway maintenance

Manual ventilation
Tracheal intubation
IV administration

Applicable anesthetic and emergency drugs

13. Prepare the system:

• Turn all vaporizers off.

• Open the APL valve.

• Set the Bag/Ventilator switch to Bag.

• Set all flow controls to minimum.

• Set sufficient patient suction.

•Make sure that the breathing system is correctly connected and not

damaged.

wwwwWARNING Make sure that the breathing circuit is correctly connected and not

damaged.

wwwwWARNING Before you connect a patient, flush the anesthesia machine with 5

L/min of O

for at least one minute. This removes unwanted

2

mixtures and by-products from the system.

---- EEEEnnnndddd ooooffff PPPPaaaarrrrtttt 1111 ooooffff tttthhhheeee UUUUsssseeeerrrr’’’’ssss RRRReeeeffffeeeerrrreeeennnncccceeee MMMMaaaannnnuuuuaaaallll.... --

--

1009-0632-000 4-19

Aespire 7900

4-20 1009-0632-000

Index

A

ACGO 2-8
AGSS 2-10
antistatic breathing tubes or masks 2-2
APL valve 2-7
Auxiliary Common Gas Outlet switch 2-6
adequate ventilation 3-25
alarm priority 3-16

B

backup ventilation 3-22
Bag / Mechanical Ventilation switch 2-8

C

compressible volume 3-31, 3-34

E

Expiratory check valve 4-16

G

O

optional ventilation functions 2-12, 3-19

P

pipeline pressure 4-7
Pressure Control mode 3-21
Pressure controlled modes 3-17
PSVPro mode 3-21

S

SIMV mode 3-21

T

tubing compliance factor 3-31

V

Volume controlled modes 3-17

gas compression in patient tubes 3-34

I

Inspiratory check valve 4-16

L

leak test device 4-11
Link system 4-7

M

Mapleson series 2-9
menu functions 2-17
menu map 2-16
MRI environment 1-2

N

neuromuscular blocking agents 3-25
nuisance alarms 3-11

1009-0632-000

I-1

Aespire 7900

I-2

1009-0632-000

Warranty

This Product is sold by Datex-Ohmeda under the warranties set forth in the
following paragraphs. Such warranties are extended only with respect to the
purchase of this Product directly from Datex-Ohmeda or Datex-Ohmeda’s
Authorized Dealers as new merchandise and are extended to the Buyer
thereof, other than for the purpose of resale.

For a period of twelve (12) months from the date of original delivery to Buyer or
to Buyer’s order, but in no event for a period of more than two years from the
date of original delivery by Datex-Ohmeda to a Datex-Ohmeda Authorized
Dealer, this Product, other than its expendable parts, is warranted against
functional defects in materials and workmanship and to conform to the
description of the Product contained in this User’s Reference manual and
accompanying labels and/or inserts, provided that the same is properly
operated under the conditions of normal use, that regular periodic
maintenance and service is performed and that replacements and repairs are
made in accordance with the instructions provided. This same warranty is
made for a period of thirty (30) days with respect to expendable parts. The
foregoing warranties shall not apply if the Product has been repaired other
than by Datex-Ohmeda or in accordance with written instructions provided by
Datex-Ohmeda, or altered by anyone other than Datex-Ohmeda, or if the
Product has been subject to abuse, misuse, negligence, or accident.

Datex-Ohmeda’s sole and exclusive obligation and Buyer’s sole and exclusive
remedy under the above warranties is limited to repairing or replacing, free of
charge, at Datex-Ohmeda’s option, a Product, which is telephonically
reported to the nearest Datex-Ohmeda Customer Service Center and which, if
so advised by Datex-Ohmeda, is thereafter returned with a statement of the
observed deficiency, not later than seven (7) days after the expiration date of
the applicable warranty, to the Datex-Ohmeda Customer Service and
Distribution Center during normal business hours, transportation charges
prepaid, and which, upon Datex-Ohmeda’s examination, is found not to
conform with above warranties. Datex-Ohmeda

for any damages including but not limited to incidental damages,
consequential damages, or special damages.

shall not be otherwise liable

CONFIDENTIAL - NOT FOR RELEASE

There are no express or implied warranties which extend beyond the
warranties hereinabove set forth. Datex-Ohmeda makes no warranty of
merchantability or fitness for a particular purpose with respect to the product
or parts thereof.

Aespire 7900
User’s Reference Manual, English Part 1
1009 0632 000
10 04 A 01 21 03
Printed in USA
©Datex-Ohmeda, Inc. All rights reserved