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What This Guide Helps With
Troubleshoots repeated feed or flush occlusion alarms caused by tubing routing, clamps, disposable sets, patient connections, positioning, or pump-specific sensing problems.
Step-by-Step Troubleshooting
1. Maintain Patient Safety
Stop the affected feeding or flushing process and provide another verified pump or approved feeding method if continued delivery is required.
Do not repeatedly restart an occluding system while connected to a patient.
Expected outcome: Patient care continues without relying on the alarmed pump.
2. Identify Which Path Is Alarmed
Determine whether the alarm involves feed delivery, flush delivery, or both. Record the displayed message and whether the alarm occurs immediately or after a period of operation.
Expected outcome: The affected fluid path and timing of the alarm are known.
3. Inspect the Entire External Tubing Path
Trace tubing from the feeding or flush container through the pump and toward the patient connection.
Look for closed clamps, tight bends, tubing trapped under equipment, compressed tubing, improperly installed connectors, or positional pinching.
Expected outcome: The external tubing path is open and unrestricted.
If correcting an obvious restriction clears the alarm and the pump operates normally, stop troubleshooting after final verification.
4. Separate the Pump From the Patient-Side Connection
For bench evaluation, disconnect the patient and use an appropriate test container or open test path.
Do not assume a patient tube is patent solely because it appears unobstructed.
Expected outcome: The pump can be tested independently of the patient's feeding tube and clinical connection.
5. Verify Bag and Tubing Position
Confirm that the feeding and flush containers are positioned appropriately and that tubing is not stretched, sharply bent, or pulled sideways where it passes through the pump.
Expected outcome: Positioning does not create artificial upstream or downstream restriction.
6. Inspect and Reload the Disposable
Remove the set and inspect it for collapsed tubing, malformed components, damaged connectors, or sections that remain flattened.
Reload it carefully and confirm correct cassette and tubing seating.
Expected outcome: The disposable is correctly installed without deformation.
7. Test With a Known-Good Disposable
Use a new or known-good compatible feeding set and perform a nonpatient feeding or flush test.
Expected outcome: The known-good set runs without an occlusion alarm.
If the fault follows the original set, remove that disposable from use and stop troubleshooting after final verification.
8. Compare Feed and Flush Paths
For a feed/flush setup, determine whether one path works normally while the other repeatedly alarms.
This can help identify a disposable-path problem rather than a general pump failure.
Expected outcome: The affected pathway is isolated.
9. Perform Functional Verification
Run the pump using a controlled test setup long enough to confirm stable flow and normal alarm behavior.
Verify that intentionally creating and then removing an external restriction produces and clears the appropriate response according to approved testing practices.
Expected outcome: Normal delivery resumes and the occlusion alarm system responds consistently.
10. Escalate Persistent False Occlusion Alarms
If the alarm continues with an unrestricted bench setup and multiple known-good disposables, remove the device from service.
Expected outcome: A pump with potentially unreliable pressure or occlusion detection is not returned to patient use.
If the Problem Persists
External tubing, disposable, positioning, clamp, connection, and patient-path causes have been ruled out. The remaining fault may involve pressure sensing, tubing interaction with the pumping mechanism, mechanical loading, calibration, or another service-level condition.
Remove the pump from service, label it Out of Service, and send it for qualified bench evaluation using manufacturer documentation and suitable test equipment. Any repair or calibration must be completed by qualified personnel, followed by applicable delivery and alarm verification before return to service.
Recognizing when an alarm problem requires bench service is proper troubleshooting.
Clinical Use Tip
An occlusion alarm is a patient-safety function; never bypass or dismiss repeated alarms simply because tubing appears visually open.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Staff reported repeated feed occlusion alarms even though the feeding tubing appeared open."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found the tubing was being compressed where it passed through an equipment clamp near the pump."
Resolution
What action was taken.
Example:
"Rerouted the tubing, verified unrestricted flow and normal alarm behavior, and returned the pump to service."
Helpful Details to Include (If Known)
- Exact alarm message
- Feed or flush path affected
- Alarm timing
- Clamp positions
- Tubing routing and condition
- Patient-side connection tested
- Known-good set result
- Bench test result
- Alarm verification result
- Final device status
Final Thought
Trace the complete fluid path before assuming a sensor failure, separate patient-side restrictions from pump problems, verify alarm behavior after correction, and escalate persistent false alarms appropriately.
That is successful troubleshooting.