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What This Guide Helps With
Troubleshoots missing maternal pulse or SpO2 monitoring caused by disconnected accessories, damaged cables, incompatible components, configuration, or module communication problems.
Step-by-Step Troubleshooting
1. Protect the Patient and Provide Alternate Monitoring
If maternal pulse or oxygen saturation monitoring is clinically required, use another verified monitor or approved measurement method before troubleshooting the unavailable function.
Expected outcome: Maternal monitoring continues without dependence on the malfunctioning channel.
2. Confirm What Is Not Detected
Determine whether the monitor fails to recognize the maternal measurement function entirely, recognizes it intermittently, or recognizes the module but does not display a valid measurement.
Expected outcome: Module-detection failure is distinguished from sensor or signal-quality failure.
3. Verify Basic Monitor Operation
Confirm the Avalon FM20 starts normally, remains powered, and operates other monitoring channels correctly.
Expected outcome: The problem is isolated to the maternal pulse or SpO2 function rather than a general monitor failure.
4. Inspect All External Accessories
Inspect the maternal monitoring module or interface, patient cable, sensor, connectors, and strain reliefs for damage, contamination, bent contacts, liquid intrusion, or excessive wear.
Expected outcome: All external components are intact and safe for further testing.
5. Reseat the Module and Connections
When clinically safe, disconnect and reconnect accessible module, cable, and sensor connections completely. Confirm connectors are correctly oriented and fully seated.
Expected outcome: The monitoring function is consistently detected after reconnection. If restored, proceed to final verification.
6. Verify Accessory Compatibility
Confirm the module, cable, and sensor are approved and compatible with the particular Avalon FM20 configuration. Do not assume physically similar accessories are interchangeable.
Expected outcome: Only compatible maternal monitoring accessories are used.
7. Substitute Known-Good Components
Use known-good compatible external components one at a time, beginning with the patient sensor or cable and progressing toward the external module or interface where applicable.
Expected outcome: The defective accessory or monitor-side problem is isolated without unnecessary replacement of multiple components.
8. Check Accessible Configuration
Verify that the maternal measurement function is enabled and assigned appropriately under the facility's approved configuration. Do not enter unauthorized service menus or change protected settings without authorization.
Expected outcome: No accessible configuration issue prevents detection.
9. Perform Functional Verification
Using approved simulation, test equipment, or manufacturer-supported functional checks, verify module detection, stable pulse or SpO2 measurement, appropriate waveform or indicators when applicable, and alarm operation.
Expected outcome: Maternal monitoring remains stable and functions correctly. If successful, troubleshooting can stop.
10. Remove From Service if Detection Remains Unreliable
If known-good compatible accessories remain unrecognized or disconnect intermittently, remove the monitor from service and refer it for bench evaluation.
Expected outcome: An unreliable maternal monitoring function is not returned to clinical use.
If the Problem Persists
External cables, sensors, accessory compatibility, seating, and accessible configuration have been ruled out. The remaining cause may involve the monitor's module interface, communication circuitry, configuration, or another internal service-level condition.
Remove the unit from service, label it Out of Service, and send it for repair or bench evaluation. Evaluation should use appropriate Philips documentation and approved test equipment. Repairs and configuration changes should be performed only by qualified personnel.
Before return to service, verify all affected maternal parameters, alarm functions, accessory recognition, and overall monitor operation. Appropriate escalation after external checks is proper troubleshooting.
Clinical Use Tip
When maternal pulse or SpO2 is clinically required, establish monitoring on another verified device before disconnecting modules or sensors for troubleshooting.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Staff reported that the Avalon FM20 would not detect the maternal SpO2 monitoring accessory."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found the external patient cable had an intermittent connection, while a known-good cable was recognized consistently."
Resolution
What action was taken.
Example:
"Replaced the defective cable and verified stable maternal SpO2 detection, measurement, and alarm operation."
Helpful Details to Include (If Known)
- Affected maternal parameter
- Module or accessory detected status
- Sensor and cable condition
- Connector condition
- Compatible accessories used
- Known-good substitution results
- Configuration observed
- Alarm behavior
- Final parameter verification
- Final device status
Final Thought
Maintain maternal monitoring first, isolate accessories before the monitor, verify configuration without unauthorized changes, and escalate persistent detection failures with complete documentation.
That is successful troubleshooting.