Asset Type
Manufacturer
Model
Inspect the Patient Circuit
- Ensure all tubing connections are secure and fully seated.
- Check for cracks, holes, or loose fittings.
- Confirm there are no kinks or obstructions.
Why: Even a small leak or disconnection can trigger a flow sensor error.
Check the Flow Sensor Module
- Locate the flow sensor (usually near the patient connection or ventilator port).
- Verify it is properly installed and seated.
- Inspect for visible damage, moisture, or condensation.
Why: A loose or wet sensor prevents accurate flow readings.
Verify Humidifier and Additional Circuit Components
- Ensure the humidifier is seated correctly and tubing is fully connected.
- Check other inline devices (filters, adapters) for leaks or added resistance.
Why: Extra resistance or leaks can trigger flow sensor alarms.
Observe the Ventilator Display
- Note the error code and any accompanying messages.
- Document the error for Clinical Engineering tracking.
Attempt a Simple Reset
- Power off the ventilator.
- Reseat the circuit and flow sensor connections.
- Power on and rerun the self-test.
Why: Sometimes a simple reseating clears false errors.
If the Flow Sensor Error Persists
- After completing the above steps, if the ventilator still reports a flow sensor error:
- Common external causes have been ruled out.
- The issue is likely internal (flow sensor module, electronics, or calibration).
- Next steps:
- Remove the ventilator from clinical service.
- Label as Out of Service.
- Send for repair or bench evaluation.
- Knowing when to stop troubleshooting is part of proper Clinical Engineering practice.
Clinical Use Tip
- Never troubleshoot on an active patient.
- Move the patient to another ventilator before performing any checks.
- Only interact with the circuit and ventilator when it is safe to do so.
Work Order Documentation (CCR Method)
Complaint
What was reported by the clinical staff.
Example:
“Ventilator fails self-test; flow sensor error.”
Cause
What was observed during troubleshooting.
Example:
“Circuit and flow sensor inspected and reseated, humidifier checked, no visible damage. Error persists. Suspected internal flow sensor or electronics issue.”
Resolution
What action was taken.
Example:
“Removed ventilator from service, labeled out of service, sent for repair.”
Helpful Details to Include (If Known)
- Circuit inspected or replaced
- Flow sensor reseated
- Humidifier and inline devices checked
- Error cleared or persisted
- Any visible damage, moisture, or condensation
- Final disposition (returned to service or sent for repair)
That is successful troubleshooting.