On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
This guide assists Clinical Engineering in troubleshooting situations where the Life Scope G Series monitor displays inaccurate or failed NIBP (non-invasive blood pressure) readings or calibration errors. Symptoms may include:
- Alarms stating “NIBP calibration error”
- Inconsistent or unusually high/low readings
- Inability to start an NIBP measurement
- Repeated measurement failures
Most issues originate from external, verifiable factors such as cuff problems, tubing leaks, or setup errors before considering internal device failure.
Step-by-Step Troubleshooting
Check Power and Device Readiness
- Ensure the monitor is powered on and not in standby mode.
- Confirm that other vitals are displayed correctly to rule out broader system faults.
- Why: A partially booted device or low battery may interfere with NIBP measurements.
Inspect the NIBP Cuff
- Verify the cuff is the correct size for the patient.
- Look for tears, worn material, or leaks.
- Ensure the cuff hose connection is secure at both ends (cuff → tubing → monitor).
- Why: A damaged or improperly sized cuff is the most common cause of calibration errors.
Examine the Tubing and Connectors
- Check for kinks, pinches, or sharp bends in the tubing.
- Look for air leaks by gently inflating the cuff manually and listening for hissing.
- Ensure all connectors are fully seated.
- Why: Tubing leaks or improper connections can prevent accurate pressure readings.
Confirm Proper NIBP Setup
- Verify that the correct measurement interval and mode are selected.
- Ensure the patient’s arm is at heart level and still during measurement.
- Why: Improper setup can trigger calibration errors even if the hardware is fine.
Check Device Calibration Status
- Review the monitor’s NIBP calibration log if available.
- If the device indicates the need for a manual calibration, follow manufacturer-approved procedures.
- Why: Some calibration routines are time-dependent; missing or overdue calibrations may trigger errors.
Power Cycle the Monitor
- Turn the monitor off, wait 30 seconds, and turn it back on.
- Retest the NIBP measurement.
- Why: Temporary software glitches can sometimes cause calibration errors.
If the Problem Persists
If the above steps do not resolve the issue:
- External causes (cuff, tubing, setup, software) have been ruled out.
- The issue is likely internal, such as a faulty NIBP module or pressure sensor.
- Actions:
- Remove the monitor from service.
- Label as Out of Service (OOS).
- Send to Biomedical Engineering or manufacturer-authorized service for bench evaluation.
Knowing when to escalate is proper troubleshooting and ensures patient safety.
Clinical Use Tip
Do not perform NIBP troubleshooting on a patient requiring urgent monitoring.
Move the patient to a verified working monitor first.
Only test NIBP functions when the patient is not actively dependent on it.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
“Monitor repeatedly shows NIBP calibration error and fails to start measurement.”
Cause
What was observed during troubleshooting.
Example:
Cuff inspected and tubing verified with no leaks. Device software and settings checked. Calibration log indicates error persists.
Resolution
What action was taken.
Example:
Device removed from service, labeled Out of Service, and sent for manufacturer evaluation. Temporary monitor used for patient care.
Helpful Details to Include
- Outlet tested
- Cuff size verified
- Tubing inspected for leaks or kinks
- Alarm messages recorded
- Indicator lights observed during attempt
- Final device status: Out of Service
Final Thought
Patient safety and accurate readings are paramount. Systematic, logical troubleshooting ensures minor, external causes are ruled out first. Escalation to repair should be done when external factors are eliminated, and proper documentation ensures continuity of care.
That is successful troubleshooting.