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Asset Type
Manufacturer
Model
What This Guide Helps With
Alarm: CIRCUIT DISCONNECT indicating loss of ventilation due to disconnected circuit, power recovery state, or airflow pathway interruption. This condition results in no delivered breaths and poses immediate risk to the patient.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Immediately assess the patient
- Provide manual ventilation or switch to a backup ventilator
- Call for clinical support if needed
Verify the Reported Alarm and Behavior
- Confirm CIRCUIT DISCONNECT alarm is active
- Observe absence of delivered breaths
- Check for audible and visual alarm
- Note if ventilator is in idle or standby mode
Check Patient Circuit Connections
- Ensure circuit is fully connected at ventilator ports
- Inspect wye, filters, humidifier, and patient interface
- Reseat any loose or partially connected fittings
Inspect Circuit Integrity
- Look for cracks, holes, or disconnected tubing
- Replace circuit if damage is found
Check for Recent Power Loss or Recovery
- Determine if AC power was recently lost
- Verify ventilator did not revert to idle mode
- Confirm system resumed proper operation
Run Extended Self-Test (EST)
- Remove ventilator from patient use
- Perform EST per manufacturer procedure
- Verify system passes all checks
Swap with Known-Good Circuit
- Replace breathing circuit with a known-good set
- Check if alarm clears with replacement
If the Problem Persists
If external causes such as loose connections, damaged circuits, and power recovery conditions are ruled out:
- Remove the device from service
- Label the device “Out of Service”
- Send for repair or bench evaluation
Clinical Use Tip
Never troubleshoot a ventilator circuit disconnect alarm on an active patient. Always establish backup ventilation before performing any checks.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Ventilator alarming 'CIRCUIT DISCONNECT,' no ventilation delivered to patient."
Cause
What was observed during troubleshooting.
Example:
"Loose connection identified at patient wye causing loss of circuit integrity."
Resolution
What action was taken.
Example:
"Re-secured circuit connections and verified normal ventilation restored."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
Circuit disconnect alarms represent an immediate loss of ventilation. Always prioritize patient safety, verify all external connections thoroughly, and escalate appropriately if the issue persists beyond simple causes.
That is successful troubleshooting.