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What This Guide Helps With
This guide addresses repeated or unexpected air-in-line alarms on a BD Alaris infusion pump. It focuses on simple, external, and easily verifiable causes first—such as IV bag setup, tubing priming, cassette loading, and air sensor cleanliness—before assuming internal failure.
Air-in-line alarms are often setup-related. Logical troubleshooting can resolve most issues without unnecessary repair escalation.
Step-by-Step Troubleshooting
1. Ensure Patient Safety First
- If the pump is actively infusing, pause the infusion.
- Move the patient to a backup pump if therapy cannot be safely interrupted.
- Do not troubleshoot while medication is actively infusing unless clinically appropriate.
2. Inspect the IV Bag or Fluid Container
- Confirm the bag is not empty or nearly empty.
- Ensure the spike is fully seated in the bag port.
- Check for air entering through a loose connection.
- Why this matters: Low fluid levels or loose spikes are common causes of air introduction.
3. Inspect the Tubing from Bag to Pump
- Look for visible air bubbles in the tubing.
- Check for loose luer connections.
- Ensure there are no cracks in the tubing.
- Verify all clamps are open and fluid is flowing freely.
- If air is present:
- Re-prime the tubing per facility protocol.
- Replace the tubing if repeated bubbles appear.
4. Check the Pump Segment in the Mechanism
- Open the pump door and inspect the cassette/administration set section.
- Confirm tubing is fully seated in the channel.
- Ensure the tubing is not twisted or misaligned over the air sensor.
- Close the door firmly until it latches.
- Why this matters: Misalignment over the ultrasonic air sensor can falsely trigger alarms.
5. Inspect the Air Sensor Area
- Look for dried fluid, tape residue, or debris in the air detection area.
- Clean the exterior sensor area with approved disinfectant (avoid excessive moisture).
- Do not disassemble the pump.
6. Replace the Administration Set
- If alarms continue:
- Replace the entire IV set with a new one.
- Fully prime the new tubing before loading.
- This rules out micro-fractures or manufacturing defects in the tubing.
7. Test the Pump Off-Patient
- Load a properly primed new set.
- Run fluid into a test receptacle.
- Observe for recurring air alarms.
- If the alarm persists under controlled testing, the issue may be internal.
If the Problem Persists
If all external causes have been ruled out and the air-in-line alarm continues during controlled testing, the likely causes may include:
- Faulty ultrasonic air-in-line sensor
- Sensor calibration drift
- Internal board-level issue
At this point:
- Remove the pump from service
- Label it Out of Service
- Send for bench evaluation or authorized repair
Knowing when to stop is proper troubleshooting.
Clinical Use Tip
Never attempt to “clear alarms repeatedly” on an active patient without verifying the cause. Air-in-line alarms exist to prevent air embolism risk. Always ensure patient therapy is safely transferred before extended troubleshooting.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
“Nurse reports repeated air-in-line alarms during infusion despite full IV bag.”
Cause
What was observed during troubleshooting.
Example:
“Visible air bubbles noted in tubing due to incomplete priming. Tubing replaced and properly primed. No further alarms observed during functional test.”
Resolution
What action was taken.
Example:
“Replaced administration set, re-primed line, verified proper seating in pump channel. Performed off-patient functional test. Pump returned to service.”
“Removed from service. Tagged Out of Service and sent to shop for air sensor evaluation.”
Helpful Details to Include in Documentation
- Was outlet tested (if using module system)?
- Tubing replaced?
- Alarm reproducible off-patient?
- Sensor area cleaned?
- Any visible air observed?
- Final operational status
Final Thought
Air-in-line alarms are frequently caused by setup or tubing issues—not pump failure. A structured approach protects the patient, avoids unnecessary repairs, and supports reliable documentation. When external causes are eliminated and alarms persist, escalation is the correct and professional decision.
That is successful troubleshooting.