How to check Anaesthetic Machine Full Test, Full Check Or Leak Test Video GE Datex Ohmeda 9100c NXT.

The GE Datex Ohmeda 9100c NXT anesthesia machine requires a mandatory automated pre-use checkout (Full Test) prior to clinical use to verify circuit integrity, gas delivery controls, valve responsiveness, and safety limits. Step-by-Step 9100c NXT Full Test Procedure When the workstation is powered on, navigate to Checkout and Calibration and select FULL TEST: 1. ​PRE-TEST INSPECTION a. Connect the breathing circuit and manual breathing bag. b. Verify the soda lime absorbent canister is properly locked and not exhausted. c. Confirm pipeline/cylinder gas supplies (O₂, N₂O, Medical Air). d. Check the waste gas scavenging system connection and flow. e. Ensure vaporizers are securely mounted, filled, and turned off (0%). f. Confirm the O₂ cell calibration reads 21% with air flow. 2. VENTILATOR LEAK & COMPLIANCE TEST: a. Set the Bag/Vent selector switch to Vent. b. Turn all gas flow control valves fully off (0 L/min). c. Keep the patient Y-piece open when prompted, then confirm. d. Occlude the patient Y-piece tightly and confirm. e. Press and hold the O₂ Flush button until the bellows rises and fills completely. The unit automatically measures compliance and checks for internal leaks. 3. VAPORIZER LEAK TEST a. Turn the active vaporizer dial to 1% and confirm. b. Turn it back to the off/locked position and confirm. c. Repeat for the second vaporizer station (or select Skip if unpopulated). 4. GAS CONTROL SYSTEM TEST a. Adjust and verify gas flow rates systematically when prompted (N₂O, O₂ to 3 L/min, and Air to 3 L/min), verifying rotameter readouts and closing them when prompted. 5. CIRCUIT LEAK & APL VALVE TEST a. Switch the Bag/Vent selector to Bag. b. Set the APL valve to 30 cmH₂O. c. Set O₂ flow to 0.25 L/min and press the O₂ Flush button to pressurize the circuit to peak pressure between 30 and 35 cmH₂O. d. Rotate the APL valve to between 30 and 70 cmH₂O; verify that pressure stabilizes or holds. e. Squeeze the manual reservoir bag to observe and verify the inspiratory and expiratory unidirectional check valves. f. Reset the APL valve to desired clinical position (e.g., minimum or SPONT), open the patient Y-piece, and shut off all gas flows. 6. SAFETY CONFIRMATION Confirm emergency backup O₂ cylinder pressure, backup ventilation availability, functional suction, and patient monitoring readiness to finalize the checkout. OR Performing a full pre-use check of an anesthesia machine involves a systematic verification of low-, intermediate-, and high-pressure pneumatic systems, safety devices, breathing circuits, and integrated ventilators. ESSENTIAL PRE-USE TESTING STEPS 1. POWER AND SELF-TEST: Turn on the machine and verify it is connected to AC power. Run the automated self-test (startup electronic and pneumatic check) if available. 2. EMERGENCY BACKUP EQUIPMENT: Confirm the availability of a functional manual self-inflating resuscitator bag and a reserve auxiliary oxygen E-cylinder (minimum pressure around 1,000 PSI). 3. GAS SUPPLY AND PIPELINE PRESSURES: Verify that pipeline pressures for oxygen (O₂), nitrous oxide (N₂O), and medical air read approximately 400 kPa (or 50–55 psi). Check cylinder contents and ensure pin-index safety systems and Bodok seals are intact. 4. LOW-PRESSURE LEAK TEST (BREATHING CIRCUIT): Occlude the Y-piece, close the adjustable pressure limiting (APL) valve, and pressurize the circuit using the auxiliary O₂ flush valve until the manometer reaches roughly 30–40 cm H₂O. Ensure pressure holds stable without excessive drop. 5. FLOWMETERS AND HYPOXIC GUARD: Inspect flow control valves and bobbins for smooth operation. Test the hypoxic guard system by lowering oxygen flow to confirm that nitrous oxide flow appropriately restricts or shuts off to prevent a hypoxic mixture. 6. VAPORIZERS: Check that vaporizers are securely mounted, properly filled with the correct agent, and that the interlock system prevents more than one vaporizer from being turned on simultaneously. 7. SCAVENGING AND SUCTION SYSTEMS: Inspect the waste gas scavenging system for active suction/flow and verify that auxiliary patient airway suction is fully functional. 8. ALARMS AND MONITORS: Test lower-limit oxygen delivery alarms, breathing circuit disconnect alarms, and airway pressure limits.