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Asset Type
Continuous Renal Replacement Therapy (CRRT)
Manufacturer
Model
What This Guide Helps With
This guide assists Clinical Engineering in troubleshooting situations where the PrismaFlex system does not recognize the installed cartridge or filter set. This may present as an alarm or prevent therapy from starting. The focus is on simple setup, connection, and detection issues before assuming internal sensor or control board failure.
Step-by-Step Troubleshooting
Verify Correct Cartridge/Filter Set
- Confirm the installed set is compatible with the PrismaFlex system.
- Incorrect or expired sets may not be recognized by the machine.
Check Proper Cartridge Installation
- Ensure the cartridge is fully seated in the mounting area.
- Look for misalignment, gaps, or incomplete engagement with the holder.
- Improper seating can prevent detection sensors from activating.
Inspect Cartridge Detection Area
- Check for debris, fluid, or residue in the cartridge bay.
- Clean gently if needed.
- Sensors may fail to detect the cartridge if obstructed.
Verify Door Closure and Latching
- Ensure the cartridge compartment door is fully closed and latched.
- Many systems require proper door engagement to confirm cartridge presence.
Check for Damaged Cartridge Components
- Inspect plastic housing, connectors, or identification features (e.g., tabs or chips).
- A damaged cartridge may not be detected.
Reseat the Cartridge
- Remove and reinstall the cartridge carefully.
- Listen/feel for proper engagement.
- This often resolves alignment-related detection issues.
Restart the System
- Power cycle the PrismaFlex unit.
- Restarting can reset detection logic and clear false alarms.
Check Cable Connections (if applicable)
- Some configurations may include sensor or communication points near the cartridge area.
- Ensure no loose or disconnected wiring externally visible.
Try a Different Cartridge Set
- Install a new, known-good cartridge.
- This helps determine if the issue is with the disposable set or the machine.
Observe for Error Messages or Patterns
- Note if the system intermittently detects the cartridge.
- Intermittent detection may indicate sensor alignment or wear issues.
If the Problem Persists
If all external checks have been completed and the cartridge is still not detected, the issue is likely internal, such as:
- Cartridge detection sensor failure
- Wiring or harness issue
- Control board fault
- Remove the device from service
- Label it Out of Service
- Send for repair or further bench evaluation
Recognizing when the issue is beyond external troubleshooting is essential to safe and effective Clinical Engineering practice.
Clinical Use Tip
Do not attempt troubleshooting while the device is connected to a patient.
Ensure the patient is safely transitioned to another CRRT device or therapy before beginning troubleshooting. Patient safety must always come first.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
“Unit reports “Cartridge Not Detected” and will not start therapy.”
Cause
What was observed during troubleshooting.
Example:
“Cartridge not fully seated in holder; detection sensor not engaged.”
Resolution
What action was taken.
Example:
“Reseated cartridge and verified proper installation; system recognized cartridge and passed setup.”
Helpful Details to Include
- Cartridge type and lot number checked
- Cartridge reseated or replaced
- Door latch verified
- Detection area cleaned
- Power cycle performed
- Alarm message details
- Final device status (returned to service or removed)
Final Thought
Effective troubleshooting starts with simple, visible causes such as improper setup or alignment. By systematically ruling out external factors, Clinical Engineering can quickly identify whether the issue is user-related or requires escalation. Patient safety and proper documentation remain the priority throughout the process.
That is successful troubleshooting.