On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
This guide assists Clinical Engineering in troubleshooting ICU Medical GemStar infusion pumps that trigger air-in-line (AIL) alarms despite a properly primed and free-flowing line. These false alarms are often caused by setup issues, sensor contamination, or tubing irregularities rather than actual air in the fluid path. Following this guide ensures patient safety and proper device function before escalating for repair.
Step-by-Step Troubleshooting
Verify Patient Safety
- Ensure the patient is on another functional pump or IV source.
- Never troubleshoot an active infusion directly on the patient.
Check Tubing Path and Connections
- Confirm tubing is free of kinks, sharp bends, or pinched areas.
- Ensure all connections are secure and properly seated.
- Replace the tubing if it shows signs of damage or unusual stiffness.
Inspect Cassette Installation
- Remove and reinstall the infusion cassette, ensuring it seats correctly.
- Confirm that the cassette latches fully and is not loose.
- Misalignment can trigger the AIL sensor falsely.
Check Sensor for Contamination
- Examine the air-in-line detector for fluid residue, condensation, or debris.
- Clean the sensor surface according to standard wipe-down procedures.
- Avoid excessive moisture during cleaning, which could trigger false alarms.
Verify Pump Settings
- Ensure the pump is running in the correct mode for the line type.
- Check for unusually low flow rates, which can sometimes trigger AIL alarms in the GemStar system.
Power Cycle the Pump
- Turn off the pump, wait 10–15 seconds, and power it back on.
- This can reset the sensor calibration and clear false alarms.
Replace Consumables
- If the alarm persists, try using a new cassette and new tubing set to rule out component wear.
If the Problem Persists
After verifying tubing, cassette, sensor, and settings, continued false alarms likely indicate internal sensor malfunction or electronics issues.
- Remove the pump from service.
- Label it Out of Service.
- Send for bench evaluation or manufacturer repair.
Knowing when to escalate is part of proper troubleshooting.
Clinical Use Tip
Always move the patient to another verified working pump before troubleshooting.
Ensure that all interventions are done in a safe environment, and never bypass alarms without proper authorization.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
Pump triggers air-in-line alarm even when line is primed and free-flowing.
Cause
What was observed during troubleshooting.
Example:
Sensor contamination and/or improper cassette seating observed during inspection.
Resolution
What action was taken.
Example:
Tubing straightened and checked, cassette reseated, sensor cleaned, and pump power-cycled. Alarm cleared. If unresolved, pump labeled Out of Service for repair.
Helpful Details to Include
- Outlet tested and functional
- Tubing and cassette swapped
- Sensor visually inspected and cleaned
- Alarm behavior before and after troubleshooting
- Pump power-cycled
- Final device status (working or Out of Service)
Final Thought
Patient safety and methodical troubleshooting are paramount. Always address external causes first, document thoroughly, and escalate when internal issues are suspected. Proper documentation and escalation prevent patient risk and maintain operational integrity.
That is successful troubleshooting.