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What This Guide Helps With
PRESSURE SENSOR FAIL ! alarm indicating loss or inaccuracy of airway pressure measurement, affecting safe ventilation monitoring and pressure control.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Remove the anesthesia machine from active patient use if pressure readings are unreliable or absent
- Transition to alternate ventilation
- Confirm patient is safely ventilated and monitored
Verify the Reported Alarm and Behavior
- Confirm the PRESSURE SENSOR FAIL ! alarm is displayed
- Observe when the alarm occurs (startup vs during ventilation)
- Check if airway pressure readings are missing, fixed, or inaccurate
- Look for additional alarms or ventilation issues
Check Breathing Circuit Connections
- Ensure all hoses are securely connected
- Inspect for disconnections or loose fittings
- Verify correct assembly of inspiratory and expiratory limbs
Inspect for Obstructions or Kinks
- Check for kinked or compressed tubing
- Look for blockages such as moisture, debris, or clogged filters
- Ensure unobstructed gas flow path
Check Sensor-Related Connections (External)
- Verify any accessible pressure sensing lines are properly connected
- Inspect for damaged or pinched sensing tubing
- Ensure connectors are secure without disassembly
Power Cycle the Device
- Turn the machine off
- Wait 10–15 seconds
- Power the unit back on and observe behavior
Attempt Calibration (If Available)
- Perform a pressure or system calibration using normal user procedures
- Verify calibration completes successfully
- Check if the alarm clears
Isolate Device vs External Cause
- If all external checks are normal and alarm persists
- If pressure readings remain absent or incorrect
- Suspect internal pressure sensor failure or calibration fault
If the Problem Persists
If the PRESSURE SENSOR FAIL ! alarm continues after all checks:
- Remove the device from service
- Label as Out of Service
- Send for repair or bench evaluation
Clinical Use Tip
Never troubleshoot on an active patient. Move the patient to a backup device before addressing pressure monitoring issues.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Unit displaying PRESSURE SENSOR FAIL ! alarm with no airway pressure readings during setup."
Cause
What was observed during troubleshooting.
Example:
"Breathing circuit and external connections verified normal. Alarm persisted after power cycle and calibration attempt, indicating internal pressure sensor failure."
Resolution
What action was taken.
Example:
"Removed from service, labeled Out of Service, and sent for repair and bench evaluation."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
Pressure monitoring is a critical safety function. When a sensor failure alarm is present, verify all external factors and escalate appropriately to ensure patient safety and device reliability.
That is successful troubleshooting.