Smiths Cadd-Legacy 1 PCA Plus 6500 User manual

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CADD-Legacy™ 1 Pump

CADD-Legacy™ PCA Pump

CADD-Legacy™ PLUS Pump

Deltec

44

For detailed instructions, specifications, warnings, warranties, and additional information on operating CADD® pumps, please refer to the Operator’s Manual supplied with the product. If you have additional comments or questions concerning the operation of CADD® 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® Administration Sets ...................	7
	Remote Dose Cord .........................................	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™ PCA, CADD-Legacy™ 1, and CADD-Legacy™ PLUS Computerized Ambulatory Drug Delivery pumps to persons familiar with these devices. The CADD-Legacy™ PCA, CADD-Legacy™ 1, and CADD-Legacy™ 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™ PCA, CADD-Legacy™ 1, and CADD-Legacy™ 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™ PCA, CADD-Legacy™ 1, and CADD-Legacy™ 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™ PUMPS

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™ PCA, CADD-Legacy™ 1, and CADD-Legacy™ PLUS pumps can be found in the product literature supplied with the product when originally purchased, which is incorporated herein by reference. DELTEC SPECIFI-

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 care-

fully 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™ pump is indicated for intravenous, 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.

Clinician Bolus	Continuous Rate
(used here as a loading dose)

Demand Doses

Dosage

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	Dose	Dose
Dose	Starts
Volume	in
		Duration	Duration
		Time
		Intermittent Delivery

Figure 3. Intermittent mode delivery profile.

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.

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.

2

Display	Threaded	Power Jack
	Mounting	symbol
Power Jack	Hole
Accessory		Accessory
Jack		Jack Symbol
AC Indicator
Light
		Battery
		Compartment
Air Detector
	®
	Cassette Lock
Keypad	Cassette
Dose Key on	CADD-Legacy™ PCA
	Cassette Lock
CADD-Legacy™ PCA

Front View Rear 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.

3

PCA Delivery Mode Scroll Ranges

Units	Starting	Increment		Maximum
ML	0.10	All values:	0.10	50.00
	10% of	Values between 0.01 and 0.5:	0.01	Concentration
MG	Concentration	Values between 0.50 and 100.0:	0.10	x 50
		Values between 100.0 and 1000.0:	1.00
		Values greater than 1000.0:	10.0
MCG	10% of	Values between 0.1 and 100:	0.10	Concentration
	Concentration	Values between 100 and 1000:	1.00	x 50
		Values greater than 1000:	10.00

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

			Milligrams										Micrograms
Concentration		Demand Dose		Clinician Bolus						Concentration		Demand Dose		Clinician Bolus
mg/ml	increment		max.	increment	max.					mcg/ml	increment max.			increment	max.
0.1	0.01		0.99	0.01	2				1		0.05		9.9	0.05	20
0.2	0.02		1.98	0.02	4				2		0.10		19.8	0.10	40
0.3	0.03		2.97	0.03	6				3		0.15		29.7	0.15	60
0.4	0.04		3.96	0.04	8				4		0.20		39.6	0.20	80
0.5	0.05		4.95	0.05	10				5		0.25		49.5	0.25	100
1	0.05		9.9	0.05	20				10		0.50		99.0	0.50	200
2	0.10		19.8	0.10	40				15		0.75		148.5	0.75	300
3	0.15		29.7	0.15	60				20		1.00		198.0	1.00	400
4	0.20		39.6	0.20	80				25		1.25		247.5	1.25	500
5	0.25		49.5	0.25	100				30		1.50		297.0	1.50	600
10	0.50		99.0	0.50	200				35		1.75		346.5	1.75	700
									40		2.00		396.0	2.00	800
15	0.75		148.5	0.75	300
20	1.00		198.0	1.00	400				45		2.25		445.5	2.25	900
25	1.25		247.5	1.25	500				50		2.50		495.0	2.50	1000
30	1.50		297.0	1.50	600				55		2.75		544.5	2.75	1100
35	1.75		346.5	1.75	700				60		3.00		594.0	3.00	1200
40	2.00		396.0	2.00	800				65		3.25		643.5	3.25	1300
45	2.25		445.5	2.25	900				70		3.50		693.0	3.50	1400
50	2.50		495.0	2.50	1000				75		3.75		742.5	3.75	1500
55	2.75		544.5	2.75	1100				80		4.00		792.0	4.00	1600
60	3.00		594.0	3.00	1200				85		4.25		841.5	4.25	1700
65	3.25		643.5	3.25	1300				90		4.50		891.0	4.50	1800
70	3.50		693.0	3.50	1400				95		4.75		940.5	4.75	1900
75	3.75		742.5	3.75	1500				100		5.00		990.0	5.00	2000
80	4.00		792.0	4.00	1600				200		10.00		1980.0	10.00	4000
85	4.25		841.5	4.25	1700				300		15.00		2970.0	15.00	6000
90	4.50		891.0	4.50	1800				400		20.00		3960.0	20.00	8000
95	4.75		940.5	4.75	1900				500		25.00		4950.0	25.00	10000
100	5.00		990.0	5.00	2000
									Table 3. Demand dose, clinician bolus scroll ranges,
Table 2. Demand dose, clinician bolus scroll ranges,									micrograms
milligrams
													Milliliters
										Demand Dose				Clinician Bolus
										increment		max.		increment	max.
									0.05		9.9			0.05	20

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

Specifications (Nominal)

General Pump Specifications

Resolution

Medication Cassette™ Reservoir or CADD® 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 DURACELL® 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)

High Pressure Alarm

26 (±14) psi, 1.79 (± 0.97) bar

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	5
integral anti-siphon valve, or an attached CADD® Administration Set with integral or add-on anti-siphon valve.

Doses Given

0 to 999

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

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

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

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

Air Detector Status:

Off

Onlow

Onhigh

Default: On-high

Upstream Occlusion Status:

Off

On

Default: On

Delivery Mode (CADD-Legacy™ PLUS only):

Continuous

Intermittent Default: Intermittent

6

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™ PCA pump which is an extension of the Íkey. The push button is a Single Pole Double Throw (SPDT) switch which operates in the same manner as the Í key. When the Remote Dose Cord is attached to the pump, the patient may press either the Remote Dose button or the Íkey to receive a Demand Dose. The clinician may also use either the Remote Dose button or the Íkey 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™ PCA pump. If the Remote Dose Cord is removed, the display shows a message “Remote Dose Removed”. The pump sounds an audible alarm until the „key is pressed to acknowledge the alarm.

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-metal- hydride, 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® alkaline batteries in CADD-Legacy™ 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
(ml/hr)	90
	75
	60
Rate
	45
	30
	15
	0	20	30	40	50	60	70	80	90	100
	10
					Hours

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

	18
	16
	14
(ml/hr)	12
	10
	8
Rate
	6
	4
	2
	0			200
	50	100	150		250	300	350
				Hours

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
(ml/hr)	90
	75
	60
Rate
	45
	30
	15
	0	40	60	80	100	120	140	160	180	200
	20
					Hours

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

	18
	16
	14
(ml/hr)	12
	10
	8
Rate
	6
	4
	2
	0	100	150	200	250	300	350	400
	50								450
					Hours

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

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™ pumps the Medication Cassette™ Reservoir or the administration set is 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 Íkey.

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.

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