On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
This guide assists in troubleshooting pre-use check or leak test failures on a Mindray SynoVent E5 ventilator. These failures are often caused by external setup issues such as breathing circuit leaks, misconnected components, or sensor problems, rather than internal ventilator faults. Following a systematic approach ensures patient safety and avoids unnecessary internal interventions.
Step-by-Step Troubleshooting
Verify Power and Connections
- Ensure the ventilator is plugged into a reliable power source or fully charged battery.
- Confirm the device powers on without errors.
- Reason: Power instability can cause false self-test failures.
Check Breathing Circuit Setup
- Confirm the circuit is correctly assembled according to Mindray guidelines.
- Inspect for missing components, kinks, or reversed connections.
- Reason: Improper setup can trigger leak test failure.
Inspect Circuit for Leaks
- Visually check all tubing, connectors, and filters for cracks or loose fittings.
- Ensure humidifiers, HME filters, or sampling lines are securely connected.
- Reason: Even minor leaks can fail pre-use checks.
Check Exhalation Valve and Patient Interface
- Ensure exhalation valve is unobstructed and seated properly.
- Disconnect patient interface during pre-use if required.
- Reason: A blocked valve or patient-side leak will cause test failure.
Run Self-Test in Isolation
- Disconnect all optional devices (e.g., nebulizers, external sensors) and run pre-use check again.
- Observe which step of the self-test fails.
- Reason: Identifies if external accessories are causing the issue.
Inspect Sensors and Flow Modules
- Check flow sensor, O₂ sensor, and pressure transducers for proper connection.
- Verify sensors are clean and undamaged.
- Reason: Sensor issues can falsely indicate leaks or pre-use failures.
Review Software/Settings
- Confirm ventilator software version is current.
- Ensure settings (circuit type, patient type) match the test being performed.
- Reason: Incorrect settings may cause the device to misinterpret normal conditions as a fault.
If the Problem Persists
External causes have been ruled out; the failure is likely internal.
Remove the ventilator from service.
Label as “Out of Service.”
Send to Biomedical Engineering bench evaluation or manufacturer service.
Knowing when to escalate is proper troubleshooting.
Clinical Use Tip
Never perform troubleshooting on an active patient.
Move the patient to a functioning ventilator before testing.
Ensure all alarms are active and the device is in a safe state before attempting pre-use checks.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
User reports pre-use check fails with “Leak Test Failure” alarm on SynoVent E5.
Cause
What was observed during troubleshooting.
Example:
Visual inspection revealed loose elbow connector in breathing circuit; all sensors properly seated.
Resolution
What action was taken.
Example:
Reassembled circuit, retested, pre-use check completed successfully. Device returned to service.
Helpful Details to Include (If Known)
- Outlet tested with multimeter or known good device.
- Circuit swapped or reseated.
- Alarm details: “Leak Test Failed” or specific self-test step.
- Sensor connection verified.
- Final device status: Passed pre-use check, ready for patient use.
Final Thought
Systematic troubleshooting ensures patient safety, avoids unnecessary internal interventions, and maintains equipment reliability. Thorough documentation provides clear communication for future evaluations and reinforces clinical engineering best practices.
That is successful troubleshooting.