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Asset Type
Continuous Renal Replacement Therapy (CRRT)
Manufacturer
Model
What This Guide Helps With
This guide helps troubleshoot the Baxter PrismaFlex Alarm: Scales condition when one of the system scales is identified as out of calibration. Because PrismaFlex therapy depends on accurate scale measurement for fluid balance, bag monitoring, and treatment control, this alarm can affect safe CRRT delivery if it is ignored or repeatedly reset without correction.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Treat any active Scales alarm seriously because CRRT therapy depends on accurate scale measurement.
- If the alarm occurs during patient treatment, notify clinical staff immediately and follow facility procedure.
- Do not continue relying on the PrismaFlex if the scale alarm cannot be cleared.
- If patient therapy may be affected, clinical staff should move to a safe treatment plan before the device is evaluated further.
Verify the Reported Alarm and Behavior
- Confirm that the displayed alarm is Alarm: Scales.
- Check the alarm screen to identify which scale is affected.
- Document whether the alarm occurred during setup, during priming, after bag installation, during active treatment, after moving fluid bags, or intermittently.
- Press RETEST as instructed by the system.
- If the alarm clears, continue only if clinical staff confirm it is appropriate and monitor for recurrence.
Check External and Simple Causes First
- Confirm that the correct bag is installed on the correct scale.
- Verify that the bag is hanging freely and is not touching the cart, machine frame, floor, tubing, adjacent bags, or accessories.
- Check that tubing is not pulling tightly on the bag, scale hook, or hanger.
- Inspect the scale hook, hanger, and surrounding area for visible damage, bending, fluid contamination, or obstruction.
- Correct any obvious setup, bag-positioning, tubing-tension, or interference issue before retesting.
Confirm Alarm Response After External Checks
- After correcting any external issue, press RETEST again.
- If the alarm clears, document what was corrected and continue to monitor the device for recurrence.
- Return the device to service or continued treatment use only per facility policy and clinical approval.
- If the alarm does not clear, do not continue troubleshooting while depending on the device for active therapy.
If the Alarm Does Not Clear During Treatment
- Follow the PrismaFlex treatment-discontinuation workflow.
- Clinical staff should end treatment through DISCONNECT as applicable.
- Turn the machine off when directed by procedure.
- Remove the return line from the return-line clamp and return blood when applicable, following facility and manufacturer procedure.
- Once the patient is safely disconnected, remove the device from clinical use.
Remove the Device From Service
- Label the PrismaFlex Out of Service.
- Route the unit for Clinical Engineering bench evaluation.
- Do not return the device to use until the affected scale has been calibrated, verified, and confirmed stable.
Service-Level Evaluation
- Verify the specific scale identified by the alarm screen.
- Perform scale calibration according to approved service procedure.
- Verify scale operation in Diagnose Screen – Scale Diagnose.
- Confirm the identified scale reads within specification and responds properly during diagnostic testing.
Determine Whether the Scale Requires Replacement
- If the identified scale remains out of specification after calibration, suspect a failed or unstable scale assembly.
- Replace the scale if indicated by service procedure.
- Retest the PrismaFlex after replacement and confirm the Scales alarm no longer appears.
Return to Service Only After Verification
- Confirm the Scales alarm is no longer active.
- Verify the affected scale passes calibration.
- Confirm Scale Diagnose shows acceptable operation.
- Check that no related alarms recur during functional testing.
- Confirm the device is clean, assembled, and ready for clinical use.
If the Problem Persists
If the Scales alarm remains active after external checks, RETEST, calibration, and diagnostic verification, common external causes such as incorrect bag placement, tubing tension, scale obstruction, and visible scale interference have been ruled out.
A persistent Scales alarm indicates a likely device-level scale failure or related measurement problem. Remove the PrismaFlex from service, label it Out of Service, and send it for repair, scale replacement, or further bench evaluation.
Clinical Use Tip
Never troubleshoot an unresolved Scales alarm while the patient remains dependent on the PrismaFlex for active therapy. Move the patient to a backup device or safe clinical plan first, discontinue treatment through the proper workflow, and avoid relying on a CRRT machine with questionable scale accuracy.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Baxter PrismaFlex reported Alarm: Scales during CRRT setup or treatment. Alarm screen identified an affected scale as out of calibration and the alarm did not clear after RETEST."
Cause
What was observed during troubleshooting.
Example:
"External checks were performed for bag placement, tubing tension, scale obstruction, visible damage, and fluid contamination. Affected scale remained out of calibration, indicating a scale calibration issue or scale assembly failure."
Resolution
What action was taken.
Example:
"Device was removed from service after treatment was ended through the appropriate DISCONNECT process. Identified scale was calibrated and verified in Diagnose Screen – Scale Diagnose. Scale was replaced when calibration or diagnostic verification failed."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
The Scales alarm on a Baxter PrismaFlex should be handled as a patient-safety issue because CRRT depends on accurate scale measurement. Start with simple external causes, confirm the affected scale, use RETEST appropriately, and escalate to calibration or replacement when the alarm persists. Clear documentation protects the patient, the clinical team, and the service record.
That is successful troubleshooting.