Smiths Cadd-Legacy 1 PCA Plus 6500 User manual

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44

CADD-Legacy™ 1 Pump

CADD-Legacy

CADD-Legacy

™

PCA Pump

™

PLUS Pump

Deltec

For detailed instructions, specifications, warnings, warranties, and additional information on operat­ing CADD
additional comments or questions concerning the operation of CADD

®

pumps, please refer to the Operator’s Manual supplied with the product. If you have

®

pumps, please call this num­ber: 800-426-2448. Our staff is available to help you twenty-four hours a day with the programming
and operation of CADD® pump infusion systems.

The issue date of this Technical Manual is included on the back cover for the user’s information. In
the event one year has elapsed between the issue date and product use, the user should contact
SIMS Deltec, Inc. to see if a later revision of this manual is available.

Issue Date: January 2000

41

Table of Contents

1. Introduction ............................................. 1

Limited Warranty .......................................... 1

Exposing CADD® Pumps to Radiation, Ultra­sound, or MRI or use near ECG equipment ... 1

2. CADD-Legacy™ Pump

Delivery Modes .............................................. 2

Specifications (Nominal) ................................ 5

Compatible Medication Cassette™ Reservoirs
and CADD

Remote Dose Cord ......................................... 7

®

Administration Sets ................... 7

3. Batteries ................................................... 8

Battery Compatibility ..................................... 8

DURACELL® Alkaline Battery Life............... 8

4. Construction .......................................... 11

5. Theory of Operation .............................. 12

Keyboard Circuitry ...................................... 12

Data Memory in Real Time Clock RAM ...... 12

EEPROM .................................................... 12

Battery Backed RAM ................................... 12

Time Base Circuitry ..................................... 12

LCD Circuitry .............................................. 12

LED Indicator ............................................. 13

Flash PROM Technology ............................. 13

Audible Alarm Circuitry ............................... 13

Watchdog Timer Circuit .............................. 13

Motor Drive/Motor Watchdog Circuit ......... 13

Power Circuitry ............................................ 14

Voltage Reference Circuit ............................. 14

Pumping Mechanism .................................... 14

Pumping Characteristics ............................... 15

Air Detector ................................................. 15

Downstream Occlusion Sensor .................... 16

Upstream Occlusion Sensor ......................... 16

Cassette Attachment Detection..................... 16

6. Safety Features and Fault Detection ....... 17

Hardware Safety Features ............................ 17

Software Safety Features .............................. 19

7. Hardware and Software Fault Detection 20

Overview ..................................................... 20

Order of Error Code Events ......................... 20

8. Cleaning and Inspection Procedures ....... 21

Inspection Recommendation ........................ 21

Cleaning ....................................................... 21

Battery Contact Cleaning ............................. 21

Visual Inspection .......................................... 22

Mechanical Inspection .................................. 22

9. Testing Procedures ................................. 23

Testing Recommendation ............................. 23

Changing to Lock Level 0 (LL0) .................. 23

CADD-Legacy™ PCA pump ................... 23

Air Detector Test ...................................... 25

Upstream Occlusion Sensor Test ............... 25

Occlusion Pressure Range Tests ................ 25

Accuracy Testing ....................................... 27

CADD-Legacy™ 1 pump ........................ 29

Air Detector Test ...................................... 30

Upstream Occlusion Sensor Test ............... 30

Occlusion Pressure Range Tests ................ 31

Accuracy Testing ....................................... 32

CADD-Legacy™ PLUS pump .................. 34

Air Detector Test ...................................... 35

Upstream Occlusion Sensor Test ............... 36

Occlusion Pressure Range Tests ................ 36

Accuracy Testing ....................................... 37

Cleaning and Functional Testing

Checklist ................................................ 40

42

1 Introduction

This Technical Manual is intended to provide
an understanding of the mechanical and electri­cal operation of the CADD-Legacy

™

CADD-Legacy

1, and CADD-Legacy™ PLUS
Computerized Ambulatory Drug Delivery
pumps to persons familiar with these devices.
The CADD-Legacy
and CADD-Legacy

™

PCA, CADD-Legacy™ 1,

™

PLUS pump Operator’s

Manuals should be used in conjunction with
this publication for complete information.

This manual also outlines cleaning and func­tional testing procedures that can be performed
on the CADD-Legacy
and CADD-Legacy

™

PCA, CADD-Legacy™ 1,

™

PLUS pumps.

WARNING:

This Technical Manual must be used by Bio­medical Technicians only. Do not permit patients
to have access to this manual. Do not disclose to
the patient the pump’s security codes or any other
infomation that would allow the patient complete
access to all programming and operating
functions. Improper programming could result in
death or serious injury to the patient.

IMPORTANT NOTICE:

CADD-Legacy
CADD-Legacy

™

PCA, CADD-Legacy™ 1, and

™

PLUS pump operations and
safety features are based on a microcomputer
design. Inadequate servicing or tampering with
the safety features of the pumps may seriously
affect performance and safety.

For that reason, ALL SERVICING AND

REPAIR OF THE CADD-Legacy
MUST BE PERFORMED BY DELTEC OR ITS
AUTHORIZED AGENTS.

The manufacturer’s warranty agreement shall
become null and void if the pump is not used in
accordance with the Operator’s Manual and
Instructions for Use for the pump accessories;
or, the pump is serviced by persons other than
Deltec or those authorized by Deltec.

Limited Warranty

The limited warranty associated with the
CADD-Legacy
CADD-Legacy
the product literature supplied with the product
when originally purchased, which is incorpo­rated herein by reference. DELTEC SPECIFI-

™

PCA, CADD-Legacy™ 1, and

™

PLUS pumps can be found in

™

™

PUMPS

PCA,

CALLY DISCLAIMS ANY OTHER WAR­RANTY, WHETHER EXPRESS, IMPLIED OR
STATUTORY, INCLUDING, WITHOUT
LIMITATION, ANY IMPLIED WARRANTY
OF MERCHANTABILITY OR FITNESS FOR
USE. Deltec further disclaims responsibility for
the suitability of the system for a particular
medical treatment or for any medical complica­tions resulting from the use of the system. The
manufacturer shall not be responsible for any
incidental damages or consequential damages to
property, loss of profits, or loss of use caused by
any defect or malfunction of the system.

If you wish to receive additional information
about the extent of the warranty on these prod­ucts, please contact your Deltec representative or
call Customer Service at 1-800-426-2448.

All recommendations, information, and litera­ture supplied by Deltec with respect to the
CADD

®

product line are believed to be accurate
and reliable, but do not constitute warranties.
No agent, representative, or employee of Deltec
has authority to bind Deltec to any representa­tion or warranty, expressed or implied.

Exposure to Radiation, Ultrasound or
Magnetic Resonance Imaging (MRI),
or use near ECG equipment

CAUTION:

• Do not expose the pump to therapeutic levels of

ionizing radiation as permanent damage to the
pump’s electronic circuitry may occur. The best
procedure to follow is to remove the pump
from the patient during therapeutic radiation
sessions. If the pump must remain in the vicinity
during a therapy session, it should be shielded,
and its ability to function properly should be
confirmed following treatment.

• Do not expose the pump directly to ultrasound,

as permanent damage to the pump’s electronic
circuitry may occur.

• Do not use the pump in the vicinity of magnetic

resonance imaging (MRI) equipment as mag­netic fields may adversely affect the operation
of the pump. Remove the pump from the pa­tient during MRI procedures and keep it at a
safe distance from magnetic energy.

• Do not use the pump near ECG equipment as

the pump may interfere with the operation of
the equipment. Monitor ECG equipment care­fully when using this pump.

1

2 CADD-Legacy™ Pump

Delivery Modes

The CADD-Legacy™ ambulatory drug delivery
pump provides measured drug therapy to
patients in hospital or outpatient settings. The
CADD-Legacy
nous, intra-arterial, subcutaneous, intraperi­toneal, epidural space, or subarachnoid space
infusion.

Epidural administration is limited to use with
indwelling catheters for short term delivery of
anesthetics and short or long term delivery of
analgesics. Subarachnoid administration is
limited to use with indwelling catheters for
short-term delivery of analgesics.

(used here as a loading dose)

Dosage

™

pump is indicated for intrave-

Clinician Bolus

Demand Doses

Continuous Rate

The CADD-Legacy

™

PCA pump may be
programmed to deliver medication in one of
three ways: 1) continuous rate only, 2) patient­activated dose only and 3) continuous rate and
patient-activated dose. (See figure 1.)

The CADD-Legacy

™

PLUS pump may be
programmed to deliver in one of two modes:
(1) Continuous, (2) Intermittent . (See figures 2
and 3.)

The CADD-Legacy

™

1 pump operates in
continuous mode. (See figure 2.)

Figure 4 shows a diagram of the CADD­Legacy

™

pump.

PCA Delivery Profile

The PCA (patient-controlled analgesia) delivery
mode is used for therapies that require a
continuous rate of infusion, patient-controlled
demand doses, or both, such as patient­controlled analgesia.

Time

Figure 1. PCA mode delivery profile.

Delivery

Rate

CADD-Legacy™ PLUS

(ML/HR)

or

CADD-Legacy™ 1

(ML/24 HR)

Time

Continuous Delivery

Figure 2. Continuous mode delivery profile.

Dose Cycle

Dose

Volume

Dose

Starts

in

Dose

Duration

Time

Intermittent Delivery

Dose

Duration

Continuous Mode Delivery Profile

The Continuous delivery mode allows the
infusion of drug at a constant, programmed
rate.

Intermittent Mode Delivery Profile

The Intermittent delivery mode allows the
infusion of a specific volume of drug at regular
programmed intervals.

Figure 3. Intermittent mode delivery profile.

2

Power Jack

Display

Threaded
Mounting
Hole

Power Jack
symbol

Accessory

Jack

AC Indicator

Light

Air Detector

®

Cassette Lock

Keypad

Dose Key on
CADD-Legacy™ PCA

Front View

Figure 4. Front and Rear views of the CADD-Legacy™ Pump. Features are identical on all CADD-Legacy™ pumps except as
illustrated for the CADD-Legacy™ PCA pump.

Cassette

CADD-Legacy™ PCA

Cassette Lock

Rear View

Accessory
Jack Symbol

Battery
Compartment

3

PCA Delivery Mode Scroll Ranges

Units

ML

MG

MCG

Starting

0.10

10% of
Concentration

10% of
Concentration

Increment

All values:

Values between 0.01 and 0.5:
Values between 0.50 and 100.0:
Values between 100.0 and 1000.0:
Values greater than 1000.0:

Values between 0.1 and 100:
Values between 100 and 1000:
Values greater than 1000:

Table 1. PCA delivery mode: continuous rate scroll ranges.

Milligrams

Concentration Demand Dose Clinician Bolus

mg/ml increment max. increment max.

0.1 0.01 0.99 0.01 2

0.2 0.02 1.98 0.02 4

0.3 0.03 2.97 0.03 6

0.4 0.04 3.96 0.04 8

0.5 0.05 4.95 0.05 10
1 0.05 9.9 0.05 20
2 0.10 19.8 0.10 40
3 0.15 29.7 0.15 60
4 0.20 39.6 0.20 80

5 0.25 49.5 0.25 100
10 0.50 99.0 0.50 200
15 0.75 148.5 0.75 300
20 1.00 198.0 1.00 400
25 1.25 247.5 1.25 500
30 1.50 297.0 1.50 600
35 1.75 346.5 1.75 700
40 2.00 396.0 2.00 800
45 2.25 445.5 2.25 900
50 2.50 495.0 2.50 1000
55 2.75 544.5 2.75 1100
60 3.00 594.0 3.00 1200
65 3.25 643.5 3.25 1300
70 3.50 693.0 3.50 1400
75 3.75 742.5 3.75 1500
80 4.00 792.0 4.00 1600
85 4.25 841.5 4.25 1700
90 4.50 891.0 4.50 1800
95 4.75 940.5 4.75 1900

100 5.00 990.0 5.00 2000

Table 2. Demand dose, clinician bolus scroll ranges,
milligrams

4

Maximum

0.10

0.01

0.10

1.00

10.0

0.10

1.00

10.00

50.00

Concentration
x 50

Concentration
x 50

Micrograms

Concentration Demand Dose Clinician Bolus

mcg/ml increment max. increment max.

1 0.05 9.9 0.05 20
2 0.10 19.8 0.10 40
3 0.15 29.7 0.15 60
4 0.20 39.6 0.20 80

5 0.25 49.5 0.25 100
10 0.50 99.0 0.50 200
15 0.75 148.5 0.75 300
20 1.00 198.0 1.00 400
25 1.25 247.5 1.25 500
30 1.50 297.0 1.50 600
35 1.75 346.5 1.75 700
40 2.00 396.0 2.00 800
45 2.25 445.5 2.25 900
50 2.50 495.0 2.50 1000
55 2.75 544.5 2.75 1100
60 3.00 594.0 3.00 1200
65 3.25 643.5 3.25 1300
70 3.50 693.0 3.50 1400
75 3.75 742.5 3.75 1500
80 4.00 792.0 4.00 1600
85 4.25 841.5 4.25 1700
90 4.50 891.0 4.50 1800
95 4.75 940.5 4.75 1900

100 5.00 990.0 5.00 2000
200 10.00 1980.0 10.00 4000
300 15.00 2970.0 15.00 6000
400 20.00 3960.0 20.00 8000
500 25.00 4950.0 25.00 10000

Table 3. Demand dose, clinician bolus scroll ranges,
micrograms

Milliliters

Demand Dose Clinician Bolus

increment max. increment max.

0.05 9.9 0.05 20

Table 4. Demand dose, clinician bolus scroll ranges,
milliliters

Specifications (Nominal)

High Pressure Alarm

26 (±14) psi, 1.79 (± 0.97) bar

General Pump Specifications

Resolution

Medication Cassette
Administration Set, 0.050 ml/pump stroke
nominal

Size

4.1 cm x 9.5 cm x 11.2 cm (1.6 in. x

3.8 in. x 4.4 in.) excluding cassette or other
accessories

Weight

391 g (13.8 oz.) including 2 AA batteries,
empty 100-ml Medication Cassette
Reservoir, and air detector, excluding other
accessories

Pump Alarms

Low battery power; depleted battery
power; battery dislodged; pump stopped;
pump fault; low reservoir volume; high
delivery pressure; air in line; disposable not
attached when run attempted; motor
locked; upstream occlusion; reservoir
volume empty; program incomplete;
remote dose cord removed; key stuck;
disposable detached, power removed, value
not saved.

Bolus Volume at Occlusion Alarm Pressure

0.050 ml resolution sets/reservoirs:
< 0.15 ml

Power Sources

Two AA alkaline batteries such as DURA-

®

CELL

or EVEREADY Energizer®; AC

adapter.
An internal battery powers the clock.

When it is depleted, it cannot reliably
maintain the clock time. This battery must
be replaced by SIMS Deltec, Inc. The
internal battery has an expected life of 5
years.

System Operating Temperature*

+2°C to 40°C (35°F to 104°F)

System Storage Temperature*

-20°C to 60°C (-4°F to 140°F)

System Delivery Accuracy*

± 6% (nominal)

™

Reservoir or CADD

™

Air Detector Alarm

Single bubble

®

Low sensitivity = greater than 0.250 ml
High sensitivity = greater than 0.100 ml

Multi-bubble = 1.0 ml nominal

Delivery Mode Specifications

CADD-Legacy™ PCA pump

Reservoir Volume

1 to 9999 or Not In Use; programmable in
1 ml increments, displayed in 0.1 ml
increments
Default: 1 ml

Units

Milliliters (ml), milligrams (mg), micro­grams (mcg)
Default: milligrams

Concentration

Mg/ml: 0.1, 0.2, 0.3, 0.4, 0.5, 1, 2, 3, 4, 5,
10, 15, ... 95, 100 (Default: 100 mg/ml)
Mcg/ml: 1, 2, 3, 4, 5, 10, 15, ...95, 100,
200, 300, 400, 500 (Default: 500 mcg/ml)

Continuous Rate

0 to 50 ml/hr (or the mg or mcg equivalent)
(See Table 1 for scroll ranges)

Demand Dose

0 to 9.9 ml in 0.05 ml increments (or the
mg or mcg equivalent)
(See Tables 2 and 3 for scroll ranges)
Delivery rate (Continuous Rate + Demand
Dose): 125 ml/hr nominal

Dose Lockout

5 minutes to 24 hours in the following
increments:
1 minute for values between 5 and 20
minutes
5 minutes between 20 minutes and 24
hours
Default: 24 hours

Doses Per Hour

1 to 12 doses in 1 dose increments (will
also be limited by the Demand Dose
Lockout value)

Default: 1 dose/hr

*System is defined as a CADD-Legacy™ pump with an attached Medication Cassette™ Reservoir and CADD® Extension Set with
integral anti-siphon valve, or an attached CADD® Administration Set with integral or add-on anti-siphon valve.

5

Doses Given

0 to 999

5 minutes from 00:10 to 24:00
Default: 30 minutes

Doses Attempted

0 to 999

Given

0 to 99999.95 in 0.05 unit increments or
0 to 99999.99 in 0.01 unit increments

(increments converted to current units
based on concentration)

Clinician Bolus

0.05 ml to 20.00 ml (or mg or mcg equiva­lent) (See Tables 1, 2 and 3 for scroll
ranges)
Delivery rate (Continuous Rate + Clinician
Bolus): 125 ml/hr nominal

™

CADD-Legacy

1 pump

Continuous Delivery Mode Specifications

Reservoir Volume

1 to 9999 or Not In Use; programmable in
1 ml increments, displayed in 0.1 ml
increments
Default: 1 ml

Continuous Rate

1 to 3000 ml/24 hr in increments of
1 ml/24hr
Default: 0 ml/24hr

Given

0 to 99999.95 in 0.05 ml increments

Dose Cycle

10 minutes to 96 hours in 5 minute incre­ments

Default: 4 hours

KVO Rate

0 to 125.0 ml/hr in increments of 0.1 ml/hr
Default: 0 ml/hr

Dose Starts in

Immediate or 1 minute to 96 hours in the
following increments:

00:01 from 00:00 to 00:10
00:05 from 00:10 to 96:00
Default: Immediate

Continuous Delivery Mode Specifications

Reservoir Volume

1 to 9999 or Not In Use; programmable in
1 ml increments, displayed in 0.1 ml
increments
Default: 1 ml

Continuous Rate

0.1 ml/hr to 125.0 ml/hr in increments of

0.1 ml/hr
Default: 0.0 ml/hr

Given

0 to 99999.95 in 0.05 ml increments

Biomed Functions Specifications

CADD-Legacy

™

PLUS pump

Intermittent Delivery Mode Specifications

Reservoir Volume

1 to 9999 or Not In Use; programmable in
1 ml increments, displayed in 0.1 ml
increments
Default: 1 ml

Dose Volume

0.1 to 1000.0 ml in increments of 0.1
Default: 0.0 ml

Dose Duration

1 minute to 24 hours in the following
increments:

1 minute from 00:01 to 00:10

6

Air Detector Status:

Off
On- low

On- high
Default: On-high

Upstream Occlusion Status:

Off
On
Default: On

Delivery Mode (CADD-Legacy

Continuous
Intermittent
Default: Intermittent

™

PLUS only):

Compatible Medication Cassette

™

Reservoirs and CADD® Administration
Sets

• 50-ml or 100-ml Medication Cassette
Reservoir, used with the CADD® Extension
Set with Anti-siphon Valve.

• CADD

®

Administration Set with integral
anti-siphon valve, with or without bag spike
(allows use of flexible plastic bag or sterile
vial with injector)

• CADD

®

Administration Set with add-on
anti-siphon valve and bag spike (allows for
gravity priming before attaching the add on
anti-siphon valve)

™

Remote Dose Cord

Deltec provides a Remote Dose Cord for the
CADD-Legacy
sion of the
Single Pole Double Throw (SPDT) switch
which operates in the same manner as the
key. When the Remote Dose Cord is attached
to the pump, the patient may press either the
Remote Dose button or the
a Demand Dose. The clinician may also use
either the Remote Dose button or the
to deliver a clinician-activated bolus. For easy
access, the Remote Dose Cord may be fastened
to the patient’s clothing or bedsheet with the
attached clip.

There is an alarm/function present in the
CADD-Legacy
Dose Cord is removed, the display shows a
message “Remote Dose Removed”. The pump
sounds an audible alarm until the
pressed to acknowledge the alarm.

™

PCA pump which is an exten-

Í key. The push button is a

Í key to receive

Í key

™

PCA pump. If the Remote

„ key is

Í

NOTE:

To detach the Remote Dose Cord from the
pump, grasp the Remote Dose Cord
connector and pull back using a straight,
steady motion.

7

3 Batteries

Battery Compatibility

Recommended Batteries

Two AA alkaline batteries are recommended
for use in the CADD-Legacy

™

pumps. Carbon­zinc, mercury, nickel-cadmium, nickel-metal­hydride, or zinc-air AA batteries should not be
used.

Battery Life

The CADD-Legacy

™

pumps have been de­signed to provide optimal battery life. The
expected battery life in the CADD-Legacy

™

pumps depends on the following factors:

• Programmed delivery rate

• Operating temperatures

• Battery type and brand

• Battery age

DURACELL® Alkaline Battery Life

Recommended storage conditions are 10°C to
25°C (50°F to 77°F) with no more than 65%
relative humidity noncondensing.

The following table may be used to predict
typical alkaline battery life at different delivery
rates when alkaline batteries are used in the

™

CADD-Legacy

pump. As expected, battery
life decreases as the delivery rate increases.
This table is based on laboratory tests using
fresh DURACELL
CADD-Legacy

®

alkaline batteries in

™

pumps while the pumps were
operating at room temperature.

Actual battery life may be significantly shorter
depending on the operating temperature and
the storage conditions of the battery.

Battery life is shortened significantly at very
low operating temperatures. For example, at
0°C (32°F), an alkaline battery will yield
approximately 30% of its normal capacity.

Alkaline batteries do not need to be stored in a
refrigerator. After four years of storage at 21°C
(70°F), an alkaline battery retains approxi­mately 86% of its original capacity. Battery life
will be shorter if the battery is stored above
room temperature. An alkaline battery stored
at 43°C (110°F) will be down to approximately
80% of its capacity within one year.

Continuous Delivery Battery Life with Alkaline Batteries

Rate Life Volume

0.4 ml/hr 338 hrs 135 ml
4 ml/hr 178 hrs 712 ml

10 ml/hr 112 hrs 1120 ml
15 ml/hr 96 hrs 1440 ml
30 ml/hr 53 hrs 1590 ml
75 ml/hr 18 hrs 1350 ml

125 ml/hr 15 hrs 1875 ml

Table 5. Two AA Alkaline-type batteries used with the CADD-Legacy™ pumps.

8

Intermittent Delivery Battery Life with Alkaline Batteries

Dose Volume Duration Dose Cycle KVO Life Volume

23.5 ml 1:00 hr 5:00 hr 0.2 ml/hr 193 hr 915 ml
61 ml 1:00 hr 6:00 hr 0.2 ml/hr 120 hr 1224 ml

125 ml 1:00 hr 6:00 hr 0.2 ml/hr 65 hr 1356 ml

Table 6. Two AA Alkaline-type batteries used with the CADD-Legacy™ pumps.

135

120

105

90
75

60

45

Rate (ml/hr)

30

15

0

10

20 30

40 50

Hours

Figure 5. Operating time to low battery alarm using alkaline batteries.

18

16

14

12

10

8

6

Rate (ml/hr)

4
2

0

50

100

150

200

Hours

60

250

70

80

300

90

100

350

Figure 6. Operating time to low battery alarm using alkaline batteries.

9

Continuous Delivery Battery Life with Lithium Batteries

Rate Life Volume

0.4 ml/hr 413 hrs 165 ml
4 ml/hr 307 hrs 1228 ml

10 ml/hr 190 hrs 1900 ml
15 ml/hr 163 hrs 2445 ml
30 ml/hr 90 hrs 2700 ml
75 ml/hr 33 hrs 2475 ml

125 ml/hr 22 hrs 2750 ml

Table 7. Two AA Lithium-type batteries used with the CADD-Legacy™ pumps.

Intermittent Delivery Battery Life with Lithium Batteries

Dose Volume Duration Dose Cycle KVO Life Volume

23.5 ml 1:00 hr 5:00 hr 0.2 ml/hr 300 hrs 1458 ml
61 ml 1:00 hr 6:00 hr 0.2 ml/hr 185 hrs 1911 ml

125 ml 1:00 hr 6:00 hr 0.2 ml/hr 125 hrs 2625 ml

Table 8. Two AA Lithium-type batteries used with the CADD-Legacy™ pumps.

135

120

105

90

75

60

45

Rate (ml/hr)

30

15

0

Figure 7. Dual-stroke operating time on lithium batteries.

18

16

14

12

10

8

6

Rate (ml/hr)

4
2

0

50

Figure 8. Single-stroke operating time on lithium batteries.

20

100

40 60

150

80 100

200

Hours

250

Hours

120

300

140

350

160

400

180

200

450

10

4 Construction

The pump’s housing is made of a special high
impact plastic. It is composed of two sections:
the rear and front housing. The pump housing
is sealed to ensure that the pump is water
resistant. The battery compartment is not
water resistant.

NOTE:

The CADD-Legacy

™

ambulatory infusion
pump is water resistant, but not waterproof.
The pump is “Splashproof” and is
characterized by the IEC code of IPX4.

The battery compartment is accessed through a
removable door on the rear housing. Within
the battery compartment is space for the
batteries and the four battery contacts.

On CADD-Legacy
Cassette

™

Reservoir or the administration set is

™

pumps the Medication

attached to the bottom of the pump by inserting
the two hooks on the cassette into the mating
hinge pins on the pump. The pump and the
reservoir or the administration set are then
placed in an upright position on a firm, flat
surface. The reservoir or the administration set
must be secured in place by inserting a coin (or
key if using the CADD-Legacy

™

PCA pump) in
the slot on the pump’s locking button, pushing
the button in and turning the button one­quarter turn counter-clockwise.

NOTE:

The Medication Cassette

™

Reservoir and the
administration set are intended for single
use only.

The keyboard, located on the front housing, is
composed of eight membrane switches (nine
membrane switches on the CADD-Legacy

™

PCA pump) and is sealed against moisture. All
of the keys contain domes to provide a tactile
feel when the key is pressed. The keyboard
keys are sensed by the pump’s microprocessor.

The Liquid Crystal Display (LCD), also located
on the front housing, shows the pump status
and programmed settings. The dot matrix
display consists of 16 character columns with 2
rows of characters, and is selected by the
pump’s microprocessor according to status
conditions and keyboard entries.

The microprocessor and other circuitry which
control the pump are located on a printed
circuit board. The board contains the Central
Processing Unit (CPU), motor driver circuitry,
and other circuitry. The circuitry is designed to
reduce susceptibility to interference from
electromagnetic fields and to dissipate electro­static discharge.

The LCD controller is mounted on the LCD
using chip on glass technology.

The pumping mechanism subassembly contains
the motor, gear train, camshaft, valves, expul­sor, sensing disk, infrared light source, infrared
detector, occlusion sensors, disposable sensor,
and cassette locking button. Via the motor
driver circuitry, the pump’s microprocessor
controls motor rotation.

Two external port connectors are utilized for
remote dose and external power input. The
accessory jack is used for attachment of the
Remote Dose Cord (CADD-Legacy

™

PCA
pump only) and interface cable. The Remote
Dose Cord enables the patient to use either of
two options to begin a Demand Dose when
using the PCA delivery mode: (1) the Remote
Dose button; or (2) the

Í key.

The second port allows connection to an AC
adapter.

The keyboard is connected to the printed
circuit board via a flex circuit tail. Discrete
wires connect the pumping mechanism, motor,
and sensors to the printed circuit board.

The accessory jack in conjunction with the
interface cable allows download of events
using the CADD-DIPLOMAT

™

software.

11