Anes Machine Use and Pre-use Check - CA1 focus

Transcription

1 Anes Machine Use and Pre-use Check - CA1 focus BWH Anesthesia Grand Rounds August 31, 2005 James H. Philip, MEE, MD, CCE Copyright , James H Philip, all rights reserved

2 BWH Anesthesia Workspace

3 The Anesthesia Delivery System Continuous Flow Machine for Gas Mixing and Vaporization Breathing Circuit to provide for breathing and CO2 elimination

4 Continuous Flow Machine for Gas Mixing and Vaporization Provides continuous flow of - Oxygen for Life Air to safely lower F I O 2 Nitrous Oxide for partial anesthesia Agent vapor for complete or partial anesthesia

5 N 2 O N 2 O SERVICE INLET 55 psi SIMPLIFIED ANESTHESIA MACHINE SCHEMATIC DIAGRAM No Oxygen safety features N 2 O 750 psi N 2 O FILTER N 2 O N 2 O 750 psi CHECK VALVE 35 psi PRESSURE REGULATOR S CALIBRATED VAPORIZERS I D WALL NEEDLE VALVE O psi O 2 NEEDLE VALVE O 2 [Anesthetizing gases flow] Fresh Gas Flow (FGF) DISS diameter index safety system CONNEC- TION O psi 35 psi OXYGEN FLUSH VALVE [first] Oxygen Flush Flow (last) COMMON OUTLET FRESH GAS HOSE O 2 O 2 SERVICE INLET 55psi

6 SIMPLIFIED ANESTHESIA MACHINE SCHEMATIC DIAGRAM N 2 O N 2 O SERVICE INLET 55 psi N 2 O 750 psi N 2 O FILTER FAILSAFE VALVE N 2 O N 2 O 750 psi CHECK VALVE 35 psi PRESSURE REGULATOR S CALIBRATED VAPORIZERS I D WALL NEEDLE VALVE O psi O 2 ON/OFF SWITCH NEEDLE VALVE O 2 [Anesthetizing gases flow] Fresh Gas Flow (FGF) DISS diameter index safety system CONNEC- TION O psi 35 psi OXYGEN FLUSH VALVE [first] Oxygen Flush Flow (last) COMMON OUTLET FRESH GAS HOSE O 2 O 2 SERVICE INLET 55psi

7 N 2 O N 2 O SERVICE INLET 55 psi SIMPLIFIED ANESTHESIA MACHINE SCHEMATIC DIAGRAM GEDO (GE-Datex-Ohmeda) Chain Link 25 for Delivered O 2 Modulus 2+, Aestiva N 2 O FILTER FAILSAFE VALVE N 2 O CHECK VALVE 35 psi PRESSURE REGULATOR S CALIBRATED VAPORIZERS I D WALL DISS diameter index safety system CONNEC- TION O psi O PSI Is OK 35 psi ON/OFF SWITCH 3:1 OXYGEN FLUSH VALVE [first] NEEDLE VALVE Mechanical Stop 0, 50 or 250 ml/min O 2 [Anesthetizing gases flow] Oxygen Flush Flow (last) Fresh Gas Flow (FGF) COMMON OUTLET FRESH GAS HOSE O 2 O 2 SERVICE INLET 55psi

8 N 2 O N 2 O SERVICE INLET 55 psi SIMPLIFIED ANESTHESIA MACHINE SCHEMATIC DIAGRAM Draeger ORMC = Oxygen Ratio Monitor/Controller Fabius, Tiro, Narkomed MR N 2 O FILTER Linear Regulator N 2 O CHECK VALVE 35 psi PRESSURE REGULATOR S CALIBRATED VAPORIZERS I D WALL NEEDLE VALVE O 2 O 2 ON/OFF SWITCH [Anesthetizing gases flow] Fresh Gas Flow (FGF) DISS diameter index safety system CONNEC- TION O psi PSI Is OK 35 psi Bypass Flow 0, 50 or 250 ml/min OXYGEN FLUSH VALVE [first] Oxygen Flush Flow (last) COMMON OUTLET FRESH GAS HOSE O 2 O 2 SERVICE INLET 55psi

9 Continuous Flow Gas Machine N O 2 Air O 2 L/m L/m L/m ml/m Isoflurane Sevoflurane Desflurane Vaporizer Common Outlet FGF (Fresh Gas Flow)

10 Ohmeda Modulus 2+

11 GEDO Modulus 2 SE

12 Draeger Narkomed MRI-2

13 Draeger Fabius with Real Needle Valves, Virtual Flowmeters

14 Direct-reading temperature-compensated Vaporizers Sevo Iso Des

15 Performance curve, Tec 4, 5, 7 % isoflurane Dial Setting Flow rate (L/min O 2 )

16 GE-Datex-Ohmeda Aestiva Draeger Fabius GS Two Companies

17 Breathing Circuit & CO 2 Absorber Schematics

18 Breathing Circuit & CO 2 Absorber Pictures

19 GEDO Aestiva CO2 Absorber

20 Machine Check Out Calibrate Oxygen Monitor Check Machine for gas delivery Check Circuit for integrity Check Ventilator for function Check Exhaust for function

21 Calibrate Oxygen Monitor Oxygen Monitor switched on, sensor in air 3 minutes, hole plugged. Calibrate to read 21%. Reconnect Oxygen sensor to inspired limb of breathing circuit This is called Circuit Oxygen

22 Aestiva O2 Sensor in Air for Cal

23 Fabius O2 Sensor in Air for Cal

24 Beware of missing sensor

25 Some have obvious label (good) not Fabius, yet

26 Expose sensor to air

27 Ohmeda CD - Calibrate Oxygen System Cal More

28 Tell machine to calibrate to 21%

29 Datex Capnomac Ultima Similar Calibration

30 Fabius

31 Aestiva

32 Check Machine for Gas Delivery Machine On Oxygen flows smoothly Disconnect oxygen hose Oxygen alarm sounds Switch ON oxygen tank Verify P > 1000 psi and Alarm silences Check Vaporizer is present and not empty *

33 Switch ON oxygen tank (with tank wrench)

34 Check that P > 1000 psi

35 Other ADSs

36 Check Machine for Gas Delivery 2 Tank off with wrench Turn oxygen flow up Alarm sounds on oxygen failure Connect oxygen hose to silence alarm Turn up nitrous oxide and observe alarm and/or control Perform negative pressure leak test now (possibly shown later when it makes sense)

37 Ensure there is no leak - Check circuit for integrity

38 Check Circuit for integrity Attach circuit including reservoir bag Occlude "Y" with thumb Flush and fill bag to P = 30 cmh 2 O

39 Check Circuit for integrity Attach circuit including reservoir bag Occlude "Y" with thumb Flush and fill bag to P = 30 cmh 2 O Ensure there is no leak Observer for 10 seconds Pressure should not fall

40 Check Circuit for integrity Attach circuit including reservoir bag Occlude "Y" with thumb Flush and fill bag to P = 30 cmh 2 O Ensure there is no leak Test pressure alarms Continuing pressure alarm 12 cmh 2 O for > 20 seconds High pressure alarm > 60 cmh 2 O

41 Check Circuit for integrity Attach circuit including reservoir bag Occlude "Y" with thumb Flush and fill bag to P = 30 cmh 2 O Ensure there is no leak Test Pressure Alarms Open Relief (APL, pop off) Valve Verify Reservoir bag empties

42 Check Circuit for integrity Attach circuit including reservoir bag Occlude "Y" with thumb Flush and fill bag to P = 30 cmh 2 O Ensure there is no leak Test Pressure Alarms Open Relief (APL, pop off) Valve Verify Reservoir bag empties Observe waste gas collector (scavenger) bag fills and empties

43 Leak and Compliance tests Automated on Draeger Fabius and Tiro Discussed a bit in next hour

44 Ensure that you can ventilate By hand with reservoir With mechanical ventilator

45 Check Waste Gas Collection System

46 Waste gas collector fills when reservoir bag empties Empties into evacuation system (Scavenger)

47 Check Scavenger Valves + -

48 Newer ADSs have Vacuum Gauge and Vacuum Adjustment

49 We missed one potential leak Low pressure system upstream of breathing circuit Negative Pressure Leak Test

50 Negative Pressure Leak Test Is not necessary if there is no valve Is not possible if no hose connector Perform only with GEDO (Ohmeda) Modulus 2+

51 Check Ventilator for function Ventilate reservoir bag Observe no volume loss

52 Check Suction for Function Rarely used emergently Very important when it is needed

53 Workspace Setup MRSMAID Machine Room Suction Monitors Airway I V Drugs Suction off if: DISS hose unscrewed Wall switch off Hose disconnect from Canister Canister switch off Insert seated incorrectly Any hole open Flap valve closed because unit was shaken or canister is full Flexible hose kinked Flexible hose stepped on

54 GE-Datex-Ohmeda Aestiva Draeger Fabius GS Two Companies

55 Draeger Fabius GS System Test Software, internal hardware Cal Flow, Calibrates the flow sensor Later, compensate for Des high specific heat Cal O2 FIO2 Monitor like all others - expose to air Leak Test Unique to this machine Automatic computation of leak and circuit compliance Press leak test button and follow directions: seal circuit, fill circuit, measure leak&compliance

56 All this is on Anesthesia Department Web Site Navigate to resources All checkouts are there Special thanks to Anes IS Team Jamie Bell, Dan Holtzman, Fred Donovan, Athena Dimas, and new Director, Bob Gimlich

57 Technology Matters! I have done what I can to prepare you for your future It is up to you to learn to use your tools as a true expert The resources are available The rest is up to you

58 Thank you

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