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What This Guide Helps With
Troubleshoots downstream occlusion or high-pressure alarms caused by closed clamps, kinked tubing, restricted access devices, set positioning, or external flow obstruction.
Step-by-Step Troubleshooting
1. Protect the Patient and Maintain Therapy
Do not troubleshoot an unreliable infusion pump while a patient depends on it. Transfer the patient to another verified pump or approved therapy method when interruption could affect care. Preserve the prescribed therapy and medication pathway according to clinical procedure.
Expected outcome: Patient therapy is safely maintained independently of the suspect pump. If continuity of care is established, proceed with troubleshooting.
2. Confirm the Reported Condition
Obtain the exact complaint from clinical staff. Determine whether the alarm occurs immediately after starting, intermittently during therapy, or only with a particular administration set, access device, or patient position. Note any displayed alarm wording without assuming the pump itself is defective.
Expected outcome: The failure can be characterized and, when safe, reproduced using an appropriate test setup. If the reported condition cannot be reproduced and the pump passes functional verification, troubleshooting can stop.
3. Inspect the Downstream Fluid Path
With the device disconnected from the patient, inspect the tubing from the pump toward the distal end. Look for closed clamps, kinked tubing, pinched sections, incorrectly positioned connectors, restrictive filters, closed valves, or other obvious obstructions.
Expected outcome: The downstream path is open and unrestricted. If correcting an external restriction eliminates the alarm and testing is successful, the issue is resolved and troubleshooting can stop.
4. Inspect the Administration Set
Verify that the administration set is compatible with the CURLIN 6000 application and is not visibly damaged, stretched, collapsed, contaminated, or improperly routed through the pump. Do not reuse a questionable disposable for evaluation.
Expected outcome: A suitable administration set is correctly routed and shows no visible defect. If replacing a suspect set eliminates the alarm, troubleshooting can stop after final verification.
5. Test With a Known-Good External Setup
Use an appropriate known-good administration set and nonpatient test setup. Avoid testing against a patient vascular access device. Compare pump behavior with the originally reported setup when practical.
Expected outcome: The pump operates normally with the known-good setup. If so, the original tubing, accessory, or downstream pathway was the likely cause and troubleshooting can stop after documenting the finding.
6. Check Pump Position and Set Loading
Verify the pump is positioned securely and the administration set is loaded without twisting, excessive tension, or compression from nearby equipment. Confirm the door closes normally and the set remains properly seated.
Expected outcome: The pump and tubing remain mechanically stable during operation. If repositioning or correct loading eliminates the alarm, the issue is resolved.
7. Evaluate External Backpressure
If the pump operates normally on a bench test but the clinical setup generated repeated high-pressure alarms, have the clinical team evaluate patient-side factors such as vascular access patency or downstream devices. Clinical Engineering should not diagnose or manipulate the patient's access beyond institutional scope.
Expected outcome: Pump-related and patient-side causes are appropriately separated. If the pump performs normally with the verified test setup, no pump repair is indicated.
8. Perform Final Functional Verification
Operate the pump through an appropriate nonpatient functional test using approved test equipment and procedures. Verify pumping operation, relevant alarms, controls, and general condition before returning the device to service.
Expected outcome: The pump operates consistently without inappropriate downstream occlusion alarms. If all required checks pass, troubleshooting is complete.
9. Escalate an Unresolved Alarm
If the alarm persists with a correctly loaded known-good set and unrestricted test pathway, stop external troubleshooting. Do not proceed to internal pressure-sensing components, circuit boards, or unauthorized adjustments.
Expected outcome: A persistent fault is identified as requiring bench evaluation or manufacturer-level service rather than additional external troubleshooting.
If the Problem Persists
Common external restrictions, administration-set problems, loading errors, positioning issues, and downstream pathway causes have been ruled out. The remaining fault may involve pressure sensing, mechanical pumping components, internal configuration, or another service-level condition.
The pump should be removed from service, labeled Out of Service, and sent for repair or bench evaluation. Evaluate it using appropriate manufacturer documentation and approved test equipment. Repairs, calibration, or configuration changes should be completed only by qualified personnel. Complete required return-to-service testing before clinical use.
Knowing when to stop external troubleshooting and escalate is proper troubleshooting.
Clinical Use Tip
Never use repeated alarm clearing as a substitute for identifying the cause of restricted medication delivery.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Nursing reported the CURLIN 6000 repeatedly alarmed for downstream occlusion and would not continue the infusion."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found a closed downstream clamp in the administration tubing, while the pump operated normally with an unrestricted test setup."
Resolution
What action was taken.
Example:
"Opened the restricted fluid path, verified normal pump operation and alarm behavior with a nonpatient test setup, and returned the device to service."
Helpful Details to Include (If Known)
- Exact alarm displayed
- Point in therapy when alarm occurred
- Administration set used
- Clamp and tubing condition
- Presence of filters, valves, or extensions
- Known-good set test result
- Pump and tubing positioning
- Whether the fault followed the pump or the disposable setup
- Final functional test result
- Final device status
Final Thought
Protect the patient first, verify the entire external fluid path before assuming pump failure, use controlled substitutions to isolate the cause, and escalate persistent faults with clear CCR documentation.
That is successful troubleshooting.