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What This Guide Helps With
This guide addresses situations where the Aisys CS2 anesthesia machine fails its leak test, which may prevent the machine from entering “ready for use” status. Leak test failures can indicate:
- Disconnected or damaged breathing circuits
- Loose or missing components in the circuit
- Obstructions or damage in the patient circuit
- External valves or fittings not seated correctly
The focus is on verifying external connections and setup before assuming internal leaks or module failure.
Step-by-Step Troubleshooting
Verify Machine Power & Status
- Ensure the Aisys CS2 is powered on and the system self-check has completed without unrelated errors.
Why: Some leak test failures are triggered if the machine detects other unresolved faults.
Inspect the Breathing Circuit
- Check all hoses, connectors, and patient circuit components for proper connection.
- Ensure that the inspiratory and expiratory limbs are correctly attached.
Why: Loose or improperly seated hoses are a common cause of leak test failure.
Check the CO₂ Absorber Canister & Vaporizers
- Ensure the CO₂ absorber canister is seated correctly.
- Confirm that vaporizers are locked in place.
Why: Misalignment can create small leaks that prevent the test from passing.
Examine the Reservoir Bag and Mask/Endotracheal Tube
- Ensure that the reservoir bag is properly attached and not punctured.
- Remove patient interface devices if attached during the leak test.
Why: The leak test is performed without patient devices; attached masks or tubes will cause failure.
Run a Manual Leak Test with the Circuit Closed
- Close all adjustable pressure-limiting (APL) valves and ensure the system is configured per the leak test procedure.
- Run the leak test again.
Why: Confirms that external components are functioning correctly.
Inspect for Visible Damage or Moisture
- Look for cracks, tears, or moisture inside breathing circuits or connectors.
Why: Physical damage or condensation can cause leaks that prevent test completion.
If the Problem Persists
If all external checks pass and the machine still fails the leak test:
- Remove the Aisys CS2 from service.
- Label it Out of Service.
- Escalate to GE Healthcare service or qualified biomedical engineering bench evaluation.
Reinforce that stopping at this point prevents patient risk and unnecessary component damage.
Clinical Use Tip
Never attempt to troubleshoot leaks on a patient-connected circuit.
Move the patient to another verified anesthesia machine if the leak test fails.
Only perform troubleshooting on a safe, unoccupied circuit.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
“Leak test fails on startup; machine will not enter ready status.”
Cause
What was observed during troubleshooting.
Example:
“External circuit components inspected; inspiratory/expiratory limbs and vaporizers seated correctly; no obvious damage observed.”
Resolution
What action was taken.
Example:
“Machine removed from service and labeled Out of Service for GE Healthcare evaluation.”
Helpful Details to Include
- Outlet tested and verified
- Circuit components inspected and reseated
- Vaporizers and CO₂ canister checked
- Leak test repeated
- Machine status: Out of Service
Final Thought
Patient safety is the top priority. Systematically checking external connections often resolves leak test failures. Knowing when to escalate prevents further risk and preserves the machine’s integrity. Documenting every step ensures continuity and accountability.
That is successful troubleshooting.