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What This Guide Helps With
TRS equipment that stops unexpectedly, becomes nonresponsive, intermittently loses operation, or restarts because of power, accessory, load, control, or internal problems.
Step-by-Step Troubleshooting
1. Protect the Patient and Remove the Device From Active Use
Unexpected shutdown or intermittent powered operation during surgery is not acceptable. Exchange the affected TRS component for verified backup equipment before troubleshooting.
If the device is hot, smells abnormal, has visible damage, or repeatedly stops, do not repeatedly power-cycle it in the clinical area.
Expected outcome: The procedure continues with reliable equipment and the suspect system is safely isolated.
2. Characterize the Event
Determine exactly what happened immediately before the shutdown. Ask whether the handpiece stopped under load, stopped after a certain period of use, became mechanically unresponsive, lost all power, or resumed after manipulation.
Identify the power source, attachment, and operating condition present at the time.
Expected outcome: The shutdown pattern and circumstances are documented.
3. Inspect the Power Source and Contacts
Verify correct installation and inspect the power source and accessible contacts for damage, contamination, moisture, heat, or incomplete seating.
Expected outcome: The power connection is secure and physically normal, or an external defect is identified.
4. Substitute a Known-Good Power Source
Install a known-good compatible power source and repeat controlled operation without a patient.
Expected outcome: Stable operation with the known-good source points to the original power source or its connection as the likely cause. If the device remains stable, complete verification and stop.
5. Inspect the Attachment and Mechanical Load
Remove and inspect the attachment and working accessory for binding, damage, excessive resistance, improper installation, or deformation.
A mechanical load problem can cause stopping that appears to be an electrical shutdown.
Expected outcome: The attachment and accessory move and engage normally, or an external source of excessive load is identified.
6. Test With a Known-Good Attachment
Install a compatible known-good attachment or accessory and repeat the controlled test.
Expected outcome: The shutdown either follows the attachment or remains with the handpiece.
7. Inspect Controls for Intermittency
Check triggers, selectors, and safety controls for sticking, incomplete travel, physical damage, or inconsistent response. Operate controls repeatedly under safe bench conditions.
Expected outcome: Controls respond consistently without unexpected interruption.
8. Check for Environmental or Thermal Contributors
Determine whether the complaint occurs only after extended operation, immediately following processing, in an unusually warm environment, or after the system has been stored under unfavorable conditions.
Do not cool an overheated device using unapproved methods.
Expected outcome: The device operates normally in an appropriate environment, or the shutdown remains repeatable independent of external conditions.
9. Reproduce the Problem Under Controlled Conditions
Operate the equipment with a verified power source and known-good compatible external components. Observe for sudden stopping, hesitation, abnormal heat, noise, vibration, or loss of control response.
Do not repeatedly provoke a failure if the device shows signs of mechanical or electrical distress.
Expected outcome: The system remains stable during repeated testing or the intermittent fault is confirmed.
10. Perform Final Verification or Escalate
If an external cause is corrected, perform repeated startup and operational testing before return to service.
Expected outcome: The system remains stable and predictable. Any unexplained repeat shutdown requires removal from service.
If the Problem Persists
Power source, contacts, attachments, controls, mechanical load, and external environmental conditions have been checked. Persistent unexpected shutdown may involve internal power management, motor or drive components, control circuitry, protection functions, or another service-level condition.
The device should be:
- Removed from service.
- Labeled Out of Service.
- Sent for repair or bench evaluation.
- Evaluated using appropriate DePuy Synthes documentation and approved test equipment.
- Repaired only by qualified personnel.
Intermittent faults should not be cleared merely because the device works once on the bench. Reproduce stable performance after corrective action before return to service.
Knowing when to stop external troubleshooting and escalate is proper troubleshooting.
Clinical Use Tip
An intermittent surgical power tool should be exchanged immediately; a single successful restart does not establish that the device is safe for continued surgery.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"OR staff reported that the DePuy Synthes TRS handpiece stopped unexpectedly during powered operation."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found that the shutdown followed the installed power source and did not occur with a known-good compatible power source."
Resolution
What action was taken.
Example:
"Removed the unreliable power source, completed repeated operational testing with a verified replacement, and returned the handpiece to service."
Helpful Details to Include (If Known)
- Exact shutdown behavior
- Whether power was completely lost
- Activity immediately before shutdown
- Power source installed
- Contact condition
- Known-good power-source results
- Attachment and accessory used
- Whether shutdown occurs under load
- Control response
- Abnormal heat, odor, noise, or vibration
- Reproduction results
- Final device status
Final Thought
Unexpected shutdown requires more than simply restarting the equipment. Isolate the power source, attachment, controls, load, and environment, reproduce stable operation after correction, and escalate any intermittent failure that cannot be confidently resolved.
That is successful troubleshooting.