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What This Guide Helps With
This guide helps troubleshoot the ICU Medical CADD-Solis high-priority alarm Disposable locked but not latched. This alarm indicates the pump is detecting a cassette lock status and latch status that do not match a valid safe delivery condition.
The disposable cassette may be locked without being properly latched, seated incorrectly, or not fully secured to the pump. Because this condition can affect safe fluid delivery, the pump should not be used for active infusion until the disposable is correctly attached and the alarm is cleared.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Do not continue infusion with the alarm active.
- Notify clinical staff that the pump is reporting a disposable cassette latch/lock condition.
- If medication or therapy is time-sensitive, move the infusion to a backup pump using approved clinical procedure.
- Do not attempt to force the cassette, latch, or lock mechanism while connected to an active patient.
Confirm the Reported Alarm
- Verify the pump display shows: Disposable locked but not latched.
- Confirm whether the alarm appeared during cassette setup, after locking the cassette, after pump movement, or during an attempted start of infusion.
- Ask staff whether the disposable was recently changed, removed, reattached, or handled during transport.
Inspect the Disposable Cassette Position
- Unlock the cassette lock according to facility procedure and manufacturer instructions.
- Check that the disposable cassette is aligned correctly with the pump.
- Look for tubing tension, twisted tubing, foreign material, damaged plastic, or anything preventing the cassette from sitting flat.
- Remove and reseat the disposable if it does not appear fully seated.
Latch the Disposable Before Locking
- Properly latch the disposable cassette to the pump.
- After the cassette is fully latched and seated, lock the cassette.
- Confirm the latch and lock feel normal and do not require excessive force.
- Restart setup only after the cassette appears properly attached.
Check for Disposable or Cassette Damage
- Inspect the disposable cassette for cracks, bent tabs, damaged latch points, or visible deformity.
- Replace the disposable if it appears damaged or will not seat correctly.
- Use only the correct compatible disposable for the pump and therapy setup.
Verify Alarm Clears After Reseating
- Once the disposable is properly latched and locked, confirm the alarm clears.
- Confirm the pump can proceed through setup without another latch or cassette-related alarm.
- If the alarm returns immediately with a correctly seated disposable, remove the pump from service.
If the Problem Persists
If the alarm remains after the disposable is unlocked, properly latched, seated correctly, and locked, external setup issues have been ruled out.
Remove the infusion pump from service, label it Out of Service, and send it for repair or bench evaluation. Possible causes may include a worn latch mechanism, cassette lock detection issue, damaged housing, or internal sensor/switch fault.
Clinical Use Tip
Never troubleshoot this alarm on an active patient while the infusion is expected to continue. Move the patient therapy to a backup pump first, then inspect the disposable, cassette latch, and lock condition once it is safe to do so.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"ICU Medical CADD-Solis pump displayed high-priority alarm: Disposable locked but not latched."
Cause
What was observed during troubleshooting.
Example:
"Disposable cassette was locked before being fully latched and seated to the pump. Cassette latch and lock status did not match safe delivery condition."
Resolution
What action was taken.
Example:
"Unlocked cassette lock, reseated disposable cassette, properly latched disposable, then locked cassette. Alarm cleared and pump completed setup normally."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
A disposable latch or lock alarm should be handled as a safety-related setup issue, not just a nuisance alarm. Confirm the cassette is properly seated, latched, and locked before returning the pump to use. If the pump continues to detect an invalid cassette condition after external checks, remove it from service and document the complaint, cause, and resolution clearly.
That is successful troubleshooting.