On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
This guide addresses situations where the Masimo Rad-97 pulse oximeter:
- Displays inaccurate SpO₂ readings or sudden spikes/drops
- Shows sensor errors or fails to register a reading
- Produces alarms related to poor signal quality
Focus is on logical, external, and easily verifiable causes first—such as sensor placement, cables, and patient factors—before assuming internal oximeter or sensor failure.
Step-by-Step Troubleshooting
Check Sensor Connection
- Verify the sensor is fully seated in the oximeter port.
- Inspect the cable for visible damage, kinks, or loose connectors.
Why: Loose or damaged connections can produce intermittent or false readings.
Inspect Sensor Condition
- Look for wear, frayed wires, or discoloration on reusable sensors.
- Ensure disposable sensors are not expired.
Why: Damaged or expired sensors often fail to read accurately.
Verify Proper Sensor Placement on Patient
- Ensure the sensor is applied to a suitable site (finger, toe, or earlobe).
- Remove nail polish, artificial nails, or excessive moisture if present.
Why: Poor placement or optical interference can cause erroneous SpO₂ values.
Check for Patient Movement or Perfusion Issues
- Ask the patient to remain still; check for cold extremities or poor perfusion.
- Use a different site if needed.
Why: Motion artifacts or low perfusion can trigger sensor errors or unstable readings.
Power Cycle the Device
- Turn the Rad-97 off, wait 10 seconds, then power it back on.
Why: Sometimes software resets can clear temporary sensor communication issues.
Swap Cables or Sensors if Available
- If another compatible sensor or cable is available, connect it and test.
Why: Confirms whether the issue is with the sensor or the oximeter itself.
If the Problem Persists
External causes have likely been ruled out.
- Remove the device from service and label it Out of Service.
- Send for repair or bench evaluation by Masimo or qualified Biomedical Engineering personnel.
Knowing when to stop avoids unnecessary risk and preserves patient safety.
Clinical Use Tip
- Do not rely on a suspect SpO₂ reading for patient care.
- Move the patient to a verified device before attempting further troubleshooting.
- Only troubleshoot when the patient is stable and safe.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
“Rad-97 showing fluctuating SpO₂ readings and sensor error alarms.”
Cause
What was observed during troubleshooting.
Example:
“Sensor improperly seated; cable checked and no visible damage; readings unstable despite repositioning.”
Resolution
What action was taken.
Example:
“Sensor reseated; attempted alternative site and sensor; issue persists—device removed from service and sent for repair.”
Helpful Details to Include
- Sensor model and serial number
- Cable condition and serial number
- Patient site and perfusion quality
- Any unusual readings or alarms displayed
- Device final status and labeling
Final Thought
Accurate SpO₂ readings are critical for patient safety. Logical, stepwise troubleshooting ensures you address common, external issues first. Proper escalation and documentation maintain both patient care standards and departmental efficiency.
That is successful troubleshooting.