On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
This guide assists Clinical Engineering in troubleshooting an UltraView SL Series patient monitor when non-invasive blood pressure (NIBP) or SpO₂ sensor measurements fail. Common signs include:
- NIBP readings fail to display or stop mid-cycle
- Repeated “Cuff Error” or “Sensor Error” messages
- SpO₂ readings absent, erratic, or show unusually low/high values
- Alarms triggered for measurement failure
The focus is on external checks and sensor verification before assuming internal module failure.
Step-by-Step Troubleshooting
Check Patient Safety First
- Ensure the patient is not dependent on the monitor for immediate therapy.
- Move patient to another monitor if needed.
- Only troubleshoot when patient is safe.
Verify Power and Basic Setup
- Confirm the monitor is powered on and fully booted.
- Check battery or AC connection. A low battery can cause sensor measurement errors.
Inspect NIBP Cuff and Tubing
- Ensure the cuff is appropriate size and properly attached to the patient.
- Check for kinks, leaks, or disconnected tubing.
- Swap with a known good cuff to rule out cuff defect.
Inspect SpO₂ Sensor and Cable
- Confirm correct sensor type for the UltraView SL.
- Check sensor placement on patient (finger, toe, or earlobe).
- Examine cable for damage, loose connections, or corrosion at connectors.
- Try a known working sensor on the same port to isolate sensor vs. module issue.
Check Monitor Ports and Connections
- Inspect the sensor ports for debris, bent pins, or loose connections.
- Re-seat the sensor connectors firmly.
Verify Configuration Settings
- Confirm the monitor is configured for the correct NIBP and SpO₂ measurement type.
- Ensure alarm limits are appropriate (overly restrictive limits can trigger measurement errors).
Test with a Known Good Patient Simulator (Optional)
- If available, connect a patient simulator to confirm the monitor reads NIBP and SpO₂ correctly.
- Helps distinguish between sensor failure and monitor module failure.
If the Problem Persists
If sensors and connections check out, and the monitor fails with multiple known-good sensors:
- Remove the device from service.
- Label “Out of Service” clearly.
- Send for bench evaluation or manufacturer repair.
Knowing when to escalate is proper troubleshooting; do not attempt internal repairs.
Clinical Use Tip
- Never troubleshoot NIBP or SpO₂ sensors on an active patient if readings are critical.
- Always ensure an alternative monitoring method is available before disconnecting sensors.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
“NIBP and SpO₂ measurements are failing intermittently; alarms indicate sensor error.”
Cause
What was observed during troubleshooting.
Example:
Observed that the SpO₂ sensor cable was loose and the NIBP cuff had a small leak; re-tested sensors with known-good units.
Resolution
What action was taken.
Example:
Reconnected sensors and replaced faulty NIBP cuff. Confirmed measurements stable. Device returned to service.
Helpful Details to Include
- Outlet tested and confirmed stable
- Cables swapped with known-good units
- Alarm messages observed and logged
- Sensor condition (clean, intact, correct type)
- Final device status after troubleshooting
Final Thought
Patient safety and logical troubleshooting go hand in hand. External checks and proper documentation save time and prevent unnecessary repairs. Always escalate appropriately and ensure alternative monitoring is available for patient safety.
That is successful troubleshooting.