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

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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

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

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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

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iii

S/5 Aespire

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

Off (power)

Standby

Standby or preparatory state for part of the

equipment

CAUTIONS tell you about dangerous conditions that

Not autoclavable

ÍÍ

Type B equipment

Type BF equipment

µµ

Type CF equipment

†

∏ x

“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

Alarm silence button

Equipotential

wwwwWW

Caution, ISO 7000-0434

Attention, refer to product

instructions, IEC 601-1.

Dangerous Voltage

ππ

Input

≈≈

REF Stock Number

SSSSNN

Serial Number

Bag position/ manual ventilation

Variability Read top of float

Variability in steps Vacuum inlet

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1-3

Aespire 7900

Plus, positive polarity Suction bottle outlet

1111333344

°CC

Minus, negative polarity

Lamp, lighting, illumination Cylinder

Movement in one direction Isolation transformer

Movement in two directions Low pressure leak test

Lock

Flush button

Mechanical ventilation

Unlock

Close drain

Autoclavable

Expiratory flow

Open drain (remove liquid) Alarm silence touch key

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

1009-0632-000

2-1

Aespire 7900

Anesthesia system controls

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

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.

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

7, 8

2-2

Figure 2-1 • Aespire (front view)

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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

flush button to supply high flows of O

the breathing system.

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2-3

Aespire 7900

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

2 System Controls and Menus

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

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.

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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

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

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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

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

selected if the system has the O

monitoring option.

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:

in rebreathing circuits such as the Mapleson series.

monitor if using a rebreathing circuit on ACGO.

cell in the breathing

sensor is dependent on the pressure in the

Scavenging the ACGO

sample flow

/min

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

50 60 70 80

sensor (L/min)

O or volatile

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.

O or volatile

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

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

AB.90.025

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:

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.

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).

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

• 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

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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

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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.

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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.

AB.90.041

AB.90.054

Note: If the Alarm Settings page shows

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

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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

Sensor Cal Shows menu for O

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 ◊

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

sensor calibration.

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).

’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

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Datex-Ohmeda Aespire 7900 User manual

Specifications and Main Features

Frequently Asked Questions

User Manual