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Datum 'L' Vaporizer

User Manual

42

7.4 Sevoflurane Model

Variation of output with flow rate (T = 22oC) (Air carrier gas)

Effect of Flowrate on Performance

Flowrate (l/min)

NOTE:

Individual vaporizers may vary slightly from these

performance curves.

NOTE:

The performance of the 8% model can be extrapolated

from this graph.

% Sevoflurane

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Summary of Contents for Datum L Series

Page 1: ...User Manual Datum L Vaporizer 1 Blease User Manual Blease Anaesthesia Vaporizer R L Series ...

Page 2: ...Datum L Vaporizer User Manual 2 ...

Page 3: ...um are smaller and lighter than other Datums The serial number found on the back of the vaporizer ends with the letter L Part Number 130UM000 Issue 2 December 1999 0120 MODIFICATIONS LABEL ECN 1 3573 ECN 2 3707 ECN 3 4445 ECN 4 ECN 5 ECN 6 ECN 7 ECN 8 ECN 9 ECN 10 V2 11 10 04 ...

Page 4: ...Datum L Vaporizer User Manual 4 Read this Manual before operating the ventilator ...

Page 5: ...ions 21 3 1 Physical 21 3 2 Concentration Control 21 4 Filling and Draining 22 4 1 Standard Screw Cap Filler 23 4 1 1 Filling 23 4 1 2 Draining 23 4 2 Keyed Filler 24 4 2 1 Filling 24 4 2 2 Draining 25 4 3 Quik fil Filler 26 4 3 1 Filling 26 4 3 2 Draining 27 5 Installation 28 5 1 Cagemount Model 28 5 2 Selectatec Compatible Interlock Model 29 5 3 Dragerwerk AG Compatible Model 30 6 Routine Mainte...

Page 6: ...ary 46 7 8 1 Accuracy of Output 46 7 8 2 Gas Flow Resistance 46 7 9 Effects of Back Pressure on Output 47 7 9 1 Steady Back Pressure 47 7 9 2 Effect of IPPV on Output 48 7 10 Gas Composition 48 7 10 1 Air 48 7 10 2 Nitrous Oxide 48 7 10 3 Carbon Dioxide 48 7 10 4 Helium 48 8 References 49 8 1 General 49 8 2 Keyed Filler Interlock System 49 8 3 Trademarks and Acknowledgements 49 9 Order Information...

Page 7: ...t with the approximate date of purchase If the unit is being returned for repair indicate the nature of the fault or the work you require to be carried out Contact the Company to obtain a Goods Return Number GRN prior to returning the product This is to ensure traceability and to speed the return following repair Isoflurane Enflurane and Sevoflurane vaporizers require a full service after 10 years...

Page 8: ...n Court Asheridge Road Chesham Buckinghamshire HP5 2PY England Tel 01494 784422 Fax 01494 791497 Copyright 1993 1994 1995 1996 1999 2001 Blease Medical Equipment Ltd All rights reserved The information contained in this publication may not be used for any other purpose than that for which it was originally supplied This publication may not be reproduced in part or in whole without the written cons...

Page 9: ...e familiar with the machine and its various functions before using it on a patient The terminology in this manual complies with ISO4135 Anaesthetic Apparatus Terminology The following symbols are used in this manual in addition to those specified above Vol volumetric percentage A method of expressing the concentration of a vapour in order to compare it with the concentration of a true gas 100 Vol ...

Page 10: ...harmacopoeia 4 The vaporizer must be secured in the upright position before it is connected to a patient and a leak test performed Excess dosage may be delivered if the vaporizer is moved suddenly during use 5 In the interests of health and safety it is recommended that the vaporizer be drained prior to transportation The concentration control must be set to zero if the vaporizer is transported wh...

Page 11: ...ease Service Department or an authorized engineer contacted for advice 9 While in use check frequently that the liquid level is between the minimum and maximum marks on the level indicator 10 The vaporizer may cease to function correctly if it is exposed to excessive temperatures as the temperature compensation device may be damaged The vaporizer should be stored between 20oC and 50oC 5oF and 122o...

Page 12: ... or interlocking Cage mount manifold the interlock function is void if used with a non interlock device Importance of Patient Monitoring Anaesthesia systems have the capability to deliver mixtures of gases and vapours to the patient which could cause injury or death unless controlled by a qualified anaesthetist There can be considerable variation in the effect of anaesthetic drugs on individual pa...

Page 13: ...User Manual Datum L Vaporizer 13 Symbols and abbreviations used on Blease Equipment ...

Page 14: ...Datum L Vaporizer User Manual 14 Notes ...

Page 15: ...ed between the flowmeters and the common gas outlet Because of the high internal resistance the vaporizer is unsuitable for use in a breathing system The Blease Datum Vaporizer provides accurate concentrations of anaesthetic gases in the fresh gas supply the concentration is specified using a dial on the front of the vaporizer The fresh gas supply should be between 0 5 and 15 l m ...

Page 16: ...et connector B Outlet connector C Concentration control D Filler port clamp E Filler valve control knob F Level indicator L Filler port The sight glass markings at F on this diagram are shown as a filled triangle for the Maximum Liquid Level and an empty triangle for the Minimum Liquid Level ...

Page 17: ...Key C Concentration control F Level indicator G Interlock pins Selectatec only H Locking knob K Drain plug V Filler cap W Drain screw The sight glass markings at F on this diagram are shown as a filled triangle for the Maximum Liquid Level and an empty triangle for the Minimum Liquid Level ...

Page 18: ...Datum L Vaporizer User Manual 18 2 1 Principles Key A Inlet connector B Outlet connector C Concentration control K Anaesthetic drug in liquid form L Vapour chamber M Wick IPPV coil ...

Page 19: ...hrough the vapour control valve P the bypass valve R and vapour chamber to produce the required concentration When the control is set to zero the bypass remains open however the vapour chamber is completely isolated from the patient gas flow When the control is set to the desired concentration valve S opens allowing flow into the vapour chamber The temperature compensating device T varies the dilu...

Page 20: ...kwise to set a concentration according to the graduations on the dial 2 3 Switching the Vaporizer On WARNING Never attempt to switch on the vaporizer without checking that it is fully locked on to the manifold 1 Push in the dial and rotate it counterclockwise to the desired concentration as indicated by the markings on the control knob 2 When the vaporizer is not in use the control should be turne...

Page 21: ...50 225 114 210 Cagemount Quik Fil 7 3 250 220 137 200 Drager Quik Fil 7 5 250 225 100 185 3 2 Concentration Control Halothane Isoflurane and Enflurane models The control dial is graduated in increments of 0 2 Vol from 0 to 2 Vol and in increments of 0 5 Vol from 2 to maximum Vol 8 Sevoflurane models The control dial is graduated in increments of 0 25 Vol from 0 to 2 Vol and in increments of 0 5 Vo...

Page 22: ... loose or broken This may result in overfilling or contaminated agent entering the vaporizer WARNING If a new bottle of anaesthetic agent is to be used check that the tamper evident shrink band is undamaged WARNING The vaporizer must be filled only by suitably skilled and trained personnel WARNING Do not use the vaporizer if the agent level is not visible in the sight glass or the level is outside...

Page 23: ...filling operation as overfilling may occur 3 Check that the seal on the filler cap is in place and intact then replace the cap and tighten it fully to finger tight WARNING The vaporizer must not be used if the filler cap is not replaced correctly This may cause an incorrect dose to be delivered to the patient and result in significant pollution levels 4 1 2 Draining The vaporizer must be secured i...

Page 24: ...ops into the filler port on the vaporizer If an incorrect adaptor has been fitted to the supply bottle it will not be possible to insert it into the port 5 Tighten the clamp screw and ensure the adaptor is secured 6 Raise the bottle to a level above the filler port so that any air in the bottle cannot enter the filler tube 7 Open the filler control port by pulling the lever clockwise until it stop...

Page 25: ...ler adaptor on to the supply bottle and tighten it fully to ensure it is airtight 4 Insert the end of the filler adaptor into the filler port on the vaporizer If an incorrect adaptor has been fitted to the supply bottle it will not be possible to insert it into the port 5 Tighten the clamp screw and ensure the adaptor is secured 6 Keeping the bottle below the level of the filler port open the fill...

Page 26: ...e bottle to align the bottle filler nozzle keys 2 with the index slots 3 in the filler block 5 Note the liquid level in the vaporizer sight glass and press the agent bottle fully into the vaporizer filler block Allow the liquid to flow into the vaporizer until the maximum level mark is reached paying continuous attention to the level in the sight glass and the air return bubbles 4 flowing into the...

Page 27: ... bottle nozzle into the drain funnel Rotate the bottle to align the index slots in the drain funnel 2 with the bottle filler nozzle keys 3 and screw the drain funnel onto the empty bottle 3 Fully insert the drain funnel into the keyed drain slot 4 in the bottom of the vaporizer filler block 4 Unscrew the drain plug 5 with the key 6 Continue to drain the vaporizer until empty Close the drain plug a...

Page 28: ...ed 1 Secure the vaporizer to the backbar of the anaesthetic machine using the studs nuts washers and spacers provided 2 Lightly smear the tapers with an oxygen safe grease such as Fomblin 3 Push the gas tubing fully on to the appropriate tapers and tighten the fixing nuts WARNING Ensure all joints are gas tight before using the machine WARNING Perform a backbar function test before using the machi...

Page 29: ... down and turning the locking lever on the top fully clockwise to the locked position 4 Ensure that the vaporizer is locked securely to the backbar and that the vaporizer manifold is positioned level with and parallel to the top face of the backbar Ensure correct alignment and engagement of the gas connection ports and button plate before locking the vaporizer WARNING Ensure all joints are gas tig...

Page 30: ...plates are aligned correctly 2 Lower the vaporizer onto the backbar and ensure that it is correctly seated 3 Lock the vaporizer into position by turning the locking lever on the top fully clockwise to the locked position 4 Ensure that the vaporizer is locked securely to the backbar and that the vaporizer manifold is positioned level with and parallel to the top face of the backbar WARNING Ensure a...

Page 31: ...ntains a stabilizing agent 0 1 thymol which is only slightly volatile and will accumulate in the vaporizer eventually causing the output concentration to decrease The concentration of thymol may also have clinically deleterious effects on the patient see Rodenburg Alila Anaesthesia 1984 38 581 583 WARNING Anaesthetic agents may suffer from brown or yellow discolouration if exposed to light and gas...

Page 32: ...ing points must be observed 1 Due consideration of the above statement should be taken into account 2 The test method should be so designed that it follows closely the clinical conditions of use 3 The sampling technique should be such that it truly represents the output of the unit under test 4 If a number of units are to be tested together and a consistent error is observed this is unlikely to be...

Page 33: ...ng the vaporizer 9 If in doubt please contact Blease Technical support 6 4 Training A Blease training course is available to engineers and technicians who are required to service Blease vaporizers The course includes Leak testing Seal replacement Internal cleaning Major sub assembly replacement Output regulation The Blease Datum Service Manual contains a description of all these procedures ...

Page 34: ...valve the following tests should be performed There may be a dangerous increase in pressure if these tests are performed in the absence of such a valve i Set a suitable test flow of oxygen 6 8 litre min and with the vaporizer in the off position temporarily occlude the common gas outlet There should be no leak from any of the vaporizer fitments and the flowmeter bobbin will dip ii Repeat this test...

Page 35: ...User Manual Datum L Vaporizer 35 Notes ...

Page 36: ... 36 7 Performance 7 1 Halothane Model Variation of output with flow rate T 22o C Air carrier gas Effect of Flowrate on Performance Flowrate l min NOTE Individual vaporizers may vary slightly from these performance curves Halothane ...

Page 37: ...nual Datum L Vaporizer 37 Variation of output with temperature flow rate 5 l min Air Effect of Temperature Temperature Deg C NOTE Individual vaporizers may vary slightly from these performance curves Halothane ...

Page 38: ... Manual 38 7 2 Enflurane Model Variation of output with flow rate T 22o C Air carrier gas Effect of Flowrate on Performance Flowrate l min NOTE Individual vaporizers may vary slightly from these performance curves Enflurane ...

Page 39: ...nual Datum L Vaporizer 39 Variation of output with temperature flow rate 5 l min Air Effect of Temperature Temperature Deg C NOTE Individual vaporizers may vary slightly from these performance curves Enflurane ...

Page 40: ...Manual 40 7 3 Isoflurane Model Variation of output with flow rate T 22o C Air carrier gas Effect of Flowrate on Performance Flowrate l min NOTE Individual vaporizers may vary slightly from these performance curves Isoflurane ...

Page 41: ...ual Datum L Vaporizer 41 Variation of output with temperature flow rate 5 l min Air Effect of Temperature Temperature Deg C NOTE Individual vaporizers may vary slightly from these performance curves Isoflurane ...

Page 42: ...ation of output with flow rate T 22oC Air carrier gas Effect of Flowrate on Performance Flowrate l min NOTE Individual vaporizers may vary slightly from these performance curves NOTE The performance of the 8 model can be extrapolated from this graph Sevoflurane ...

Page 43: ...f output with temperature flow rate 5 l min Air Effect of Temperature Temperature Deg C NOTE Individual vaporizers may vary slightly from these performance curves NOTE The performance of the 8 model can be extrapolated from this graph Sevoflurane ...

Page 44: ...llowed before the vaporizer is used 7 6 Barometric Pressure Changes in barometric pressure are not normally clinically significant However the following formulae and rules should be noted The concentration control is graduated in units of Vol at an assumed barometric pressure of 101 3kPa 14 7psi When the pressure varies the true output will vary according to the formula V S x 101 3 P where V conce...

Page 45: ...re of anything up to 15kPa 150cm H2O which may significantly reduce the output concentration A small increase in output concentration can be produced by intermittent back pressure from a ventilator most noticeably at a low concentration with a low flow rate However the Blease Datum is designed to comply with the tests specified in the various appropriate Standards with regard to this effect ...

Page 46: ...revent it operating below the Minimum level 7 8 Summary 7 8 1 Accuracy of Output The delivered concentration of anaesthetic agent is accurate to 20 of the set concentration or 5 of the maximum graduation whichever is the greater at sea level at 22o C 3o C 7 8 2 Gas Flow Resistance These resistances are measured at a set concentration of zero and ambient air at 22o C 72o F and 1013mBar 14 7psi Thes...

Page 47: ...ld cause a reduction in delivered Vol as follows V S x 101 3 P where V concentration delivered expressed as Vol S set concentration P Patmospheric Pback pressure Therefore in the case of 4kPa V S x 101 3 0 96 S 105 3 This effect can usually be ignored under normal clinical circumstances WARNING Pressures in excess of 50kPa must not be imposed on the device without consultation with the Technical D...

Page 48: ...oncentration delivered is then in the middle of the range available for anaesthesia WARNING This device must not be used with anything other than Dry Medical Gases 7 10 1 Oxygen The use of oxygen will produce a slight rise in output which is unlikely to exceed 15 of the set value or 0 3 volume percentage The effect is greater at high flows with a smaller change occurring at lower flows 7 10 2 Nitr...

Page 49: ...15 DIN 13252 Sections 4 9 to 4 13 5 9 to 5 13 8 2 Keyed Filler Interlock System CSA Z168 4 M82 DIN 13252 Sections 4 11 5 11 8 3 Trademarks and Acknowledgements is the Trademark of Abbott Laboratories Quik Fil is a registered trademark of Abbott Laboratories Datum is a registered trademark of Blease Medical Limited Selectatec TEC and Ohmeda are registered trademarks of BOC Ohmeda UK Ltd Dräger is a...

Page 50: ...ard filler Drägerwerk AG compatible 13023218 Halothane 4 model also available Enflurane 5 Keyed filler Cagemount 13031118 Enflurane 5 Keyed filler Interlocking Cagemount 13034118 Enflurane 5 Keyed filler Selectatec Interlock compatible 13032118 Enflurane 5 Keyed filler Drägerwerk AG compatible 13033118 Enflurane 5 Standard filler Cagemount 13031218 Enflurane 5 Standard filler Interlocking Cagemoun...

Page 51: ...0 Draining keyed filler model 25 screw cap model 23 Draining Halothane 31 F Filling keyed filler model 24 screw cap model 23 G Gas composition 46 48 flow resistance 46 H Helium use 48 I Installation Cagemount model 28 Dräger compatible model 30 Selectatec compatible model 29 IPPV effect on output 48 K Keyed Filler draining 25 filling 24 M Monitoring viii 12 N Nitrous Oxide use 48 O Output accuracy...

Page 52: ...utine Maintenance 31 S Screw Cap Filler draining 23 filling 23 Selectatec compatible removal 30 Selectatec Compatible Interlock Installation 29 Specifications 21 Standards 49 Symbols and abbreviations 13 T Temperature Compensation 44 Training 33 V Vaporizer description 16 principle of operation 18 ...

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