Graseby 3300 Technical Service Manual rev.7 Aug 2004

Smiths Medical International Ltd.

Copyright and address

Published by Smiths Medical International Limited. All possible care has been taken in the preparation of this publication, but Smiths Medical International Limited accepts no liability for any inaccuracies that may be found. Smiths Medical reserves the right to make changes without notice both to this publication and to the product which it describes. Copyright © Smiths Medical International Limited 2004 No part of this publication may be reproduced, transmitted, transcribed, or stored in a retrieval system or translated into any human or computer language in any form by any means without the prior permission of Smiths Medical International Limited.

SMITHS MEDICAL INTERNATIONAL LIMITED, Colonial Way, Watford, Hertfordshire, United Kingdom, WD24 4LG TEL: (+44) (0)1923 246434 FAX: (+44) (0)1923 231595 www.smiths-medical.com Registered in England. Company number 362847.

Trademarks and acknowledgements: Graseby and Smiths are registered trademarks of Smiths Group plc. All other trademarks are acknowledged as the property of their respective owners.

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Issue record

Smiths Medical International Ltd.

ISSUE RECORD Issue No.

Reason for change

Pages affected

Date

Initial issues

All

91 to 93

4

Reissue

All

Dec 99

5

Reissue

All

July 00

5.1

Amendment to two pages

ii and 5-8

August 00

6

Reissue

A ll

Feb 03

7

Reissue

All

August 04

1 to 3

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Contents

Smiths International Medical Ltd.

LIST OF CONTENTS CHAPTER 1

Page

INTRODUCTION, FEATURES and SPECIFICATION ... 1-1 Introduction ... 1-1 Features ... 1-3 Specification ... 1-4 Brief history of Graseby bedside syringe pumps ... 1-6

CHAPTER 2 CONFIGURATION and DIAGNOSTICS MODE, and THRUST ADJUSTMENTS Configuration mode ... 2-1 Calling up the Configuration mode ... 2-1 Selecting an option ... 2-1 Parameters and options ... 2-2 Setting the clock ... 2-4 Disassembly and assembly of casing ... 2-5 Taking the casing apart ... 2-5 Assembly ... 2-5 AC voltage and fuse adjustment ... 2-6 AC voltage adjustment ... 2-6 Fuse adjustment ... 2-6 Diagnostic mode ... 2-6 Keying in the diagnostic mode ... 2-6 Occlusion measurements ... 2-7 Thrust measurements ... 2-7 Syringe stiction ... 2-7 Thrust checks ... 2-8 Thrust adjustments ... 2-9

CHAPTER 3 FUNCTIONAL DESCRIPTIONS Introduction ... 3-1 Drive system ... 3-1 DC motor and leadscrew ... 3-1 Toggle mechanism ... 3-1 Plunger clamp ... 3-1 Occlusion sensing system ... 3-2 Clutch assembly and opto sensor ... 3-2 Occlusion detection ... 3-2 (contd)

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Contents

Smiths Medical International Ltd. CHAPTER 3 (contd)

Page

Electro/mech control system ... 3-2 Patient control system ... 3-3 Monitor interfaces ... 3-3 Sensing (alarm) systems ... 3-3 Introduction ... 3-3 Syringe nearly empty ... 3-3 End of infusion/occlusion ... 3-3 AC power failure ... 3-3 Battery power low and OFF/RECHARGE ... 3-3 Self tests, pump malfunction ... 3-3 Drive disengaged, or syringe not fitted ... 3-3 Syringe size system ... 3-4 Cover not closed ... 3-4 Software ... 3-4

CHAPTER 4 CIRCUIT DESCRIPTIONS Introduction ... 4-1 Main board ... 4-1 Processor core ... 4-1 Motor interface ... 4-2 Power control ... 4-2 Sensors interface ... 4-3 Communications processor ... 4-3 RS232 serial interface ... 4-4 Internal serial cable ... 4-4 Printer dip switch settings ... 4-4 Regulator board ... 4-5

CHAPTER 5 FAULT CODES, CLEANING AND REPAIR PROCEDURES Fault codes ... 5-1 Cleaning ... 5-2 Repair procedures ... 5-2 Introduction ... 5-2 Fuse renewal ... 5-3 Main board renewal ... 5-3 Regulator board renewal ... 5-3 Status sensors board renewal ... 5-4 Syringe size sensors board renewal ... 5-4 AC power transformer renewal ... 5-4 Plunger clamp and super nut assembly renewal ... 5-4 Pole clamp assembly renewal ... 5-5 Leadscrew assembly renewal ... 5-5 Motor and gearbox assembly renewal ... 5-6 Occlusion clutch and disc assembly renewal ... 5-6 Membrane switch panel renewal ... 5-7 Super nut renewal ... 5-7 Plunger clamp repair ... 5-8 Batteries. Checks and replacement ... 5-8 Replacement of transparent cover assembly ... 5-8 Replacement of lock housing ... 5-9 Front and/or rear case repair ... 5-9 PCA handset repair ... 5-11

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Contents

CHAPTER 6

Page

FUNCTIONAL TESTS AND MANUFACTURING SETTINGS Functional tests ... 6-1 Linear accuracy ... 6-4 Test procedures ... 6-4 Plunger clamp alignment ... 6-4 Test procedures ... 6-4 Manufacturing settings ... 6-5

CHAPTER 7 ILLUSTRATED PARTS LIST General assembly ... 7-1 Plunger clamp assembly ... 7-7 Pole clamp assembly, locking and non-locking ... 7-8 Leadscrew assembly ... 7-10 3300 PCA handset assembly ... 7-11 Graseby 3300 Main board assembly ... 7-12 Regulator board assembly ... 7-14

CHAPTER 8 BRAUN PERFUSOR CONVERSION Syringe conversion procedures ... 8-1 Introduction ... 8-1 Nearly empty flag conversion ... 8-1 Spacer tube fitment ... 8-1 Plunger clamp plate fitment ... 8-1 Braun Perfusor selection ... 8-1 ‘P’ label fitment ... 8-1 Reselecting ‘various’ syringe brands ... 8-2 Mechanical procedures ... 8-2 Programming procedures ... 8-2

APPENDIX FITTING a MODIFIED SIZE SENSOR FLAG

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Figures and Tables LIST of FIGURES

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Smiths Medical International Ltd.

Figure

Page

1.1 1.2

Front view of pump ... 1-2 Rear view of pump ... 1-2

2.1 2.2

Case fixing screw tightening order ... 2-5 Thrust measuring set up ... 2-8

4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.11 4.12 4.13

Overall block diagram for the 3300 system ... 4-7 Main board block diagram ... 4-9 Processor core circuit diagram ... 4-11 Motor interface circuit diagram ... 4-13 Power control circuit diagram ... 4-15 Sensors interface circuit diagram ... 4-17 Communications processor circuit diagram ... 4-19 RS232 serial interface circuit diagram ... 4-21 Regulator board circuit diagram ... 4-23 Syringe size sensors board circuit ... 4-25 Opto sensors board circuit ... 4-25 Internal serial cable and ‘D’ connector connections ... 4-26 Membrane switch panel ... 4-26

5.1 5.2

Half nut (obsolete)/ Super nut ... 5-7 Strengthened front and rear case mouldings ... 5-9

6.1 6.2

Linear accuracy gauge ... 6-4 Taper gauge ... 6-4

7.1 7.2 7.3 7.4 7.5 7.6 7.7

General assembly ... 7-3 Plunger clamp assembly ... 7-7 Pole clamp assembly ... 7-9 Leadscrew assembly ... 7-10 PCA handset assembly ... 7-11 Graseby 3300 Main board assembly ... 7-12 Regulator board assembly ... 7-14

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Warnings and cautions

Smiths Medical International Ltd.

8.1

Braun Perfusor conversion: parts required ... 8-2

A.1 A.2 A.3

New modified syringe size sensor flag ... A-1 Order of tightening the case screws ... A-3 Size sensor flag: general details ... A-3

LIST of TABLES Table Description

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Page

2.1

Configuration parameters and options ... 2-2

4.1 4.2 4.3 4.4

PL2 connections ... 4.4 Seiko DPU-411 printer dip switch settings ... 4.4 PL11 Outputs ... 4.5 Temperature/voltage range for setting of RV1 ... 4-6

5.1 5.2 5.3 5.4 5.5

Main processor fault codes ... 5-1 Slave processor fault codes ... 5-2 Front case spares kit ... 5-10 Size Sensor Flag spares kit ... 5-10 Rear case spares kit ... 5-11

6.1 6.2 6.3

Functional tests ... 6-1 Manufacturing settings: Configuration mode ... 6-5 Manufacturing settings: Setup mode ... 6-5

A.1

3300 Syringe Size Sensor gauges (black) ... A-5

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Introductions and Warnings Introduction

Smiths Medical International Ltd.

This Technical Service Manual together with the accompanying Instruction Manual, contains all the information needed to maintain, repair and operate the Smiths Medical 3300 PCA pump. The contents of this Manual are intended to be read and used by suitably qualified personnel.

AC input power The AC input power socket that connects to the rear of the pump has three connections (live, neutral and earth) provided by a 3-way power cable. As the casing is doubly insulated, the connecting AC input connector situated on the pump only utilises two connections (live and neutral), there is no third earth pin. This method of AC input enables similar AC input sockets (if required) to that supplied by Smiths Medical to be used.

Warnings

Warnings tell you about dangerous conditions that could lead to death or serious injury to the user or patient that can occur if you do not obey all of the instructions in this manual. 1. WARNING: To avoid over- or under- infusion, always verify that the brand and size of the loaded syringe are the same as the brand and size displayed on the screen before starting an infusion. Failure to do so may result in an inaccurate delivery of medication, resulting in patient injury or death. 2. WARNING: To avoid incorrect or inappropriate configuration of the pump, the Configuration menu must only be selected by qualified persons or authorised personnel. Incorrect pump configuration could lead to inappropriate infusion resulting in patient injury or death. 3. WARNING: This equipment is not suitable for use in the presence of flammable anaesthetics, oxygen-enriched or explosive atmospheres. The use of the device in such atmospheres may lead to explosion or fire. 4. WARNING: To avoid possible malfunction of the pump, do not expose the pump to X- rays, gamma rays or ionizing radiation, or to the RF interference or strong electric/magnetic fields emitted (for example) by diathermy equipment or mobile telephones. If the pump is used in the presence of, or in combination with Magnetic Resonance Imaging (MRI) machines it must be protected from the magnetic field emitted by such equipment. Malfunction of the pump can cause incorrect infusion or loss of infusion resulting in patient injury or death. 5. WARNING: Operation of the pump outside the temperature limits defined in the specification may result in erroneous operation. Ensure that the temperature is within the specified limits. Failure to do so may result in patient injury or user injury. 6. WARNING: In order to ensure that the intended infusion is performed, data must be entered correctly. Likewise before confirming any displayed data the user should ensure that it is correct. Failure to do so may result in compromised function of the product, patient injury or user injury. 7. WARNING: Failure to respond promptly to an alarm may result in patient injury or death. 8. WARNING: Failure to follow the Service Manual’s maintenance schedule recommendations may result in compromised function of the product and lead to patient injury or death. 9. WARNING: It is essential that clinical staff remain within visual and audible range of the pump so that critical alarms can be seen or heard and responded to. 10. WARNING: The user should ensure that the performance offered by the pump is fit for the intended purpose. Failure to do so may result in compromised function of the product, patient injury or user injury. 11. WARNING: When the pump is carrying out an infusion, to ensure that electrical safety is maintained only items of equipment that conform to EN60950 are to be connected to the RS232 connector situated at the base of the pump, otherwise patient safety may be compromised. 12. WARNING: Correct management of battery charging is essential to ensure that the pump can operate on batteries for the time specified. Failure to do so may lead to impaired functioning of the pump, resulting in patient injury or death. 13. WARNING: Do not use a faulty pump. If the pump develops a fault then an alarm will sound; the display will indicate a FAULT condition and the pump will fail to infuse. Incorrect performance of the pump can cause complications resulting in patient injury or death. If the pump develops a fault then it must be referred to a suitably qualified engineer or returned to Smiths Medical in order to have the fault rectified.

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Warnings

Smiths Medical International Ltd.

14. WARNING: Failure to use the mains lead clamp means that the pump may be accidentally or erroneously disconnected from the mains. Although there is battery backup in case this happens, the battery may not be sufficiently charged. Consequently there is a risk of the pump not functioning, which could lead to patient injury or death. 15. WARNING: If an occlusion alarm occurs, immediately clamp the line to eliminate the possibility of a bolus being delivered to the patient. Then inspect the fluid pathway for kinks, clogged catheter, etc. in order to remove the occlusion prior to restarting the infusion. An unintentional bolus of medication can result in patient injury or death. 16. WARNING: Use only the syringes and administration sets listed in the Specification at the end of this manual. Failure to do so may result in an inaccurate delivery. Smiths Medical does not guarantee performance of the pump if syringes other than those listed are used. Incorrect function or performance of the pump can cause complications resulting in patient injury or death. 17. WARNING: The volume of fluid contained in the connecting tubing is a residual amount and will not be infused. Hence this extra volume of fluid must be allowed for when initially filling the syringe and purging the system. Under-delivery of medication can cause complications resulting in patient injury or death. 18. WARNING: To avoid patient embolism, ensure that the patient tubing is purged of all air bubbles before administering any medication. The pump provides a purge facility to assist with this process. The presence of air within the medication can result in complications leading to patient injury or death. 19. WARNING: To avoid syphoning of the syringe contents (free flow), ensure that the syringe is correctly loaded into the pump, that the syringe plunger is properly engaged by the pump’s actuator and that the pump is placed not more than 80cm above the infusion site. Syphoning can result in over-infusion leading to patient injury or death. 20. WARNING: To avoid over-infusion, do not purge the infusion line when the administration set is connected to the patient. Over-infusion of medication can result in patient injury or death. 21. WARNING: To avoid the pump becoming detached from an IV pole always make sure that the pump is securely fixed to the pole. Always check the security and stability of the assembly with the pump mounted. If no IV pole is used make sure that the pump is completely stable on a horizontal surface. Failure to observe this warning may cause damage to the 3300 PCA pump and harm the operator or the patient. As a result, the operator or patient may suffer direct injury, or the 3300 PCA pump may fail to operate correctly, leading to patient injury or death. 22. WARNING: Following a significant liquid spill onto the pump, it should be wiped dry and inspected by service personnel before being returned to service. Failure to do so may result in compromised functioning of the pump, leading to patient or user injury or death. 23. WARNING: When using a syringe smaller than 50/60 ml the occlusion pressure will increase as the diameter of the syringe decreases, i.e. the smaller the syringe the higher the pressure 24. WARNING: The patient history is lost when the clock is reset.

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Cautions Cautions

Cautions tell you about dangerous conditions that can occur and cause damage to the pump if you do not obey all of the instructions in this manual. 1. CAUTION: Refer all service, repair and calibrations only to qualified technical personnel. Unauthorised modifications to the pump must not be carried out. 2. CAUTION: If, when turning the pump on, screens similar to those illustrated are not displayed, do not use the pump. Send the pump to a suitably qualified engineer or return it to Smiths Medical in order to have the fault rectified. 3. CAUTION: Do not use cleaning and disinfecting agents other than the approved ones specified here. 4. CAUTION: The pump must not be immersed in any liquids or exposed to strong organic solvents. Wipe off spills immediately, and do not allow fluid or residues to remain on the pump. Additionally, the pump is not designed to be autoclaved, steam-sterilised, ETOsterilised or subjected to temperatures in excess of 45° C (113° F). Failure to observe this caution may cause serious damage to the pump. 5. CAUTION: If the pump is used in close proximity to a fluid bag(s), it should where possible, not be mounted directly underneath the fluid bag(s). This is to minimise the possible risk of damage to the pump from fluid ingress should the bag rupture or leak during use.

U.S.A. and Canada

Federal law in the USA and Canada restricts this device to sale by or on the order of a licensed Medical Practitioner.

FOR THE ATTENTION OF USA USERS

Application Information required by FDA. for Epidural Applications please note: 1. The device can be used for analgesic infusion. 2. Infusion may be short-term (up to 96 hrs.), or long-term in accordance with the catheter and drug labelling. 3. Use only catheters indicated for epidural administration. 4. Infusion sets with Y-connection sites should not be used for epidural applications. 5. The device must be used to administer only those analgesics which are approved for epidural administration as indicated by the drug labelling.

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Abbreviations used

Smiths Medical International Ltd.

Abbreviations The following list shows the abbreviations that have been used at various places throughout used this Chapter.

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Abbreviation

Full name

A to D AC C C COP cm cNm csk DC deg. dia. Fig. g Hg

Analogue to digital Alternating current Capacitor Centigrade Computer operating properly Centimetre Centinewton metre Countersunk Direct current Degrees Diameter Figure Gramme Mercury symbol

HPa Hz IC Kg Khz LCD LED mA mg ml mm µg No. PCA PCB Pl R RAM ROM Stat V VFD

Hectopascal Hertz (cycles per second) Integrated circuit Kilogram Kilo Hertz (1,000 c/s) Liquid crystal display Light emitting diode Milliampere Milligramme Millilitre Millimetre Microgramme Number Patient controlled analgesia Printed circuit board Plug Resistor Random access memory Read only memory Maximum infusion rate for syringe being used Volts Vacuum fluorescent display

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CHAPTER 1 INTRODUCTION, FEATURES and SPECIFICATION

Graseby 3300 PCA Syringe Pump

Smiths Medical International Ltd.

Introduction

CHAPTER 1 INTRODUCTION, FEATURES AND SPECIFICATION Introduction

The Graseby 3300 pump (see Figures 1.1 and 1.2) is a microcomputer controlled bedside syringe infusion pump. The pump can be set to give a continuous infusion, with an additional bolus if required, both programmed by the physician. The patient is also able to initiate separately the delivery of a Patient Controlled Analgesia (PCA, a fixed bolus of drug) by pressing a button on a handset. A lockout period follows this delivery, during which time any further requests are denied. Both the PCA bolus size and the lockout period are programmed by the physician. Access to the syringe is gained by inserting a special key into the pole clamp lock which is attached to the rear of the pump, this lock prevents tampering with the syringe. All the controls are clear and easy to use. The pump incorporates a back-lit dot matrix Liquid Crystal Display (LCD) that provides the user with a constant indication of its operation. The pump can be programmed by the user to work with any one of a range of brands of syringe and automatically senses the syringe size which can be 20, 30 or 50/60 ml. The pump can also display the total mass and volume of drug infused since the totalisers were last reset; the number of PCA demands; and the number of good (successful) PCA demands. Safety features have been built into the pump and its software. The pump carries out self test routines every time it is switched on. The users are warned of incidents such as ‘occlusion’ or ‘power failure’ by both visible and audible alarms. The pump can be run from AC power or from internal rechargeable batteries which give more than eight hours of use. A battery recharging circuit is contained within the pump and the batteries will become fully charged when connected to the AC power for up to 14 hours, even though the pump itself may be switched off. The battery recharging time when a pump is connected to the mains and running can be much longer. The pump makes use of a sophisticated micro-controller which combines microprocessor facilities with on-board non-volatile memory; Random Access Memory (RAM); an analogue to digital converter; communications circuitry and an internal watch-dog COP (Computer Operating Properly) monitor. These facilities normally require up to six separate silicon chips. The use of the single micro-controller greatly increases the reliability of the pump. The pump's motor is under the direct control of the micro-controller and for added security, the micro-controller’s action is monitored by a separate slave processor.

Security cover

3300 Service Manual

The lockable security cover protects the syringe from tampering only; it provides no other security. It does not lockout the keypad or give audible or visual alarms when opened.

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Figures

Smiths Medical International Ltd.

Figure 1.1 Front view of pump

Figure 1.2 Rear view of pump

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Smiths Medical International Ltd. Features

3300 Service Manual

Features

The main features of the 3300 are: •

administration of a clinician controlled continuous infusion,

•

administration of a clinician controlled bolus,

•

administration of patient controlled bolus (PCA, handset),

•

administration of a clinician override bolus,

•

ergonomic styling, simple to use and to service,

•

locked syringe cover to prevent tampering,

•

AC or battery powered,

•

caters for different brands of syringe, automatically sensed,

•

a history of events may be displayed or printed out. An RS232 connector allows the pump to be interfaced with a suitable printer,

•

fully programmable by the physician using optional program menu stages,

•

comprehensive range of audible alarms and display warnings,

•

drip proof from external moisture and no electrical connections to the patient,

•

advanced safety features incorporating state-of-the-art electronics, and

•

all materials used in this product are latex free.

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Specification Specification

Smiths Medical International Ltd.

Graseby pumps are subject to continual development and may, differ in detail from the following specification. Dimensions:

335 mm x 195 mm x 130 mm (with pole clamp fitted and plunger clamp closed).

Weight:

Not exceeding 3.5 kg including batteries and pole clamp.

Concentration :

1 µg/ml to 99.5 mg/ml.

Loading dose :

0 µg to 99.5 mg.

PCA (bolus) dose :

1 µg to 99.5 mg.

Dose duration :

STAT or 1 to 15 minutes. STAT rates ...

200 ml/hr for 50 ml syringe. 100 ml/hr for 30-35 ml syringe. 60 ml/hr for 20 ml syringe.

Lockout period :

Zero to 360 minutes.

Total dose limit time :

1 to 8 hours.

Infusion rates:

Continuous, using a 50/60 ml syringe and no bolus, 0 to 99.9 ml/hour. Continuous with PCA bolus, 0 to 20 ml/hour in 0.1 ml/h steps. Maximum PCA bolus using 50/60 ml syringe, 1 to 200 ml/hour.

Supply voltage:

220-240 V or 110-120 V at 50/60 Hz, 15 VA.

Battery type:

Sealed lead acid, rechargeable (Cyclon, 3 off). Smiths Medical recommend that the batteries are checked at least annually (see page 5-8).

Battery life:

More than 8 hours of normal pump operation when the batteries are fully charged. With the AC supply connected, up to 14 hours will be required to fully recharge low voltage batteries. This time extends if the pump is connected to the mains and running.

Syringe brands:

BD Plastipak ... Terumo ... Braun Omnifix ... Monoject ... *IMS PumpJet ... Injectomat ... DBL Rapi-ject ... Braun Perfusor ...

20, 30 and 50/60 ml. 20, 30/35 and 50/60 ml. 20, 30 and 50/60 ml. 20, 30/35 and 50/60 ml. 30 ml pre-filled syringe. 50 ml. 50 ml pre-filled. 50 ml (conversion kit available, see Chap. 8).

*The IMS syringe is accessed using the special key sequence: ALARM, PURGE and OFF when the Monoject syringe brand is displayed in the Configuration mode. Temperature range:

Operating conditions ... +5° to +40° C, 30 to 75% Rh, 700 to 1060 hPa Storage conditions ... -40° to +70° C, 30 to 90% Rh, 700 to 1060 hPa

Drive accuracy:

± 2% (contd.)

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Specification

Occlusion pressure:

The occlusion pressure is factory set between 4.5 and 5.5 kg (i.e. between 608 and 740 mmHg).

Electrical safety

Class II; type CF and Drip-proof.

Design standards:

BS5724 Part 1. IEC601 Part 1. VFG1046/1984.

Language versions:

Danish, Dutch, English, Finnish, French, German, Italian, Norwegian, Portuguese, Spanish and Swedish.

3300 Service Manual

Data retention:

All programmed values are retained following power off or AC failure.

History of events:

A facility exists that allows the operator to view or print out a history of the patient's past events.

RS232 connector:

The printer/monitor port utilises a D-type 9-way connector, and the Baud rate can be set via the Configuration mode to 9600, 4800, 2400 or 1200.

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Development of 3000 series

Smiths Medical International Ltd.

Brief history of Graseby bedside syringe pumps

MS2000 The first Graseby bedside syringe pump was the MS2000. This was a basic syringe pump capable of infusions within the range of 0.1 ml/hr to 99.9 ml/hr. It had a totaliser, a limited infusion capability, a built in pole clamp and was designed for vertical operation. The MS2000 was powered by an AC supply or its internal DC batteries. This pump is no longer manufactured by Smiths Medical. PCAS The PCAS pump was developed from the MS2000 to satisfy the growing interest in Patient Controlled Analgesia (PCA). The PCAS was very similar to the MS2000 in both appearance and mechanical design, but utilised a different microprocessor with the capability of running the extra features required for PCA and was eventually replaced by the 3300 pump. A printer port was also incorporated. This pump is no longer manufactured by Smiths Medical. 3000 The first pump in the 3000 Series of syringe pumps was the 3000 itself. This pump was designed as a low-cost alternative to the MS2000 and satisfied the need for a horizontally mounted pump. The 3000 did not have an internal battery supply. This pump is no longer manufactured by Smiths Medical. 3100 The 3100 syringe pump was developed from the 3000. It is very similar mechanically but the electronic design is superior. Dual processors were incorporated along with a vacuum fluorescent text display and internal batteries. The maximum infusion rate was increased to 199.9 ml/hr and different syringe sizes were able to be used (automatically sensed). Extra software features, such as the intelligent ‘near end’ alarm, were also incorporated. This is the only pump in the 3000 Series that is not fitted with an RS232 connector. 3300 The next bedside syringe pump to be developed was the 3300. This was similar in mechanical and electronic design to the 3100 but the features were specifically for the now more mature PCA market. A lockable syringe cover was added for security against drug theft, a four line LC display was added, and internal history recording (1500 events) with printout was also added. With the growth in PCA knowledge in the medical community, many more software features were incorporated into the 3300 to aid PCA administration. 3400 The 3400 was developed (again from the 3100) to satisfy the need for a high speed infusion pump for intravenous anaesthesia. Advances in micro-controller technology allowed the use of a single device to control all the pumps features. The maximum infusion rate was raised to 1200.0 ml/hr and bolusing facilities were also added. Later, an infusion rate calculation facility was added to the software. A larger liquid crystal display was used on the 3400 with the ability to display text in different sizes, also ‘soft-keys’ were used to make the user interface simpler. The range of syringe sizes that could be used was also increased. For more advanced applications the pump could be controlled by a computer. 3200 The 3200 was developed as a general purpose syringe pump. Wet-side pressure sensing, intermittent infusion capabilities, and computer interfacing were added. The wet-side occlusion pressure monitoring made the pump particularly suitable for use in intensive-care baby units. A large text vacuum fluorescent display was added, and the increased syringe size range of the 3400 remained. A DC input supply (10 V to 28 V DC) version of the 3200 is also manufactured by Medical. This variant is primarily intended for use in an aviation environment. (contd.)

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Smiths Medical International Ltd. Brief history

Development of 3000 series

(contd.)

3500 The 3500 was developed from the 3400 and retains all the 3400 facilities. There are two versions of the 3500, as follows: 1. A Manually Controlled Infusion (MCI) only pump. This pump can easily be converted to a ‘MCI plus TCI’ pump at the Medical Customer Service Centre. 2. An MCI plus a Target Controlled Infusion (TCI) pump. The ‘MCI plus TCI’ pump carries out a TCI using the Diprivan drug. This version of the 3500 incorporates a Diprifusor module manufactured by Zeneca Pharmaceuticals. A new main circuit board and new software allows the 3500 to interface with the Diprifusor module. A 3500 non-TCI pump can be converted by Smiths Medical to become a 3500 MCI plus TCI pump. 3150 The 3150 is very similar to the 3200 general purpose pump. The main difference being that the In-line (wet-side) pressure sensing system in not available on the 3150, i.e. the pressure transducer is not fitted.

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