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What This Guide Helps With
Weak, intermittent, inconsistent, or unexpected TRS powered performance caused by power-source, accessory, attachment, control, mechanical, or load-related problems.
Step-by-Step Troubleshooting
1. Protect the Patient and Stop Using Unreliable Output
Do not continue surgical use if the TRS handpiece provides weak, intermittent, unexpectedly changing, or otherwise unreliable powered performance.
Exchange the device for verified backup equipment before troubleshooting.
Expected outcome: The patient is no longer dependent on equipment with questionable powered performance.
2. Confirm the Exact Output Complaint
Determine what staff mean by “low,” “unstable,” or “inaccurate.” Establish whether the issue involves reduced speed, weak torque, intermittent operation, stopping under load, abnormal vibration, or inconsistent response.
Identify the handpiece, attachment, accessory, and power source used when the problem occurred.
Expected outcome: The reported performance problem is defined precisely enough to reproduce or isolate.
3. Inspect the Power Source
Verify that the installed power source is compatible, adequately charged, correctly seated, and physically undamaged.
Substitute a known-good compatible power source when possible.
Expected outcome: Normal operation with the known-good power source identifies the original power source as the likely cause. If performance is restored and remains stable, complete verification and stop.
4. Inspect the Attachment and Working Accessory
Remove the device from power as appropriate and inspect the external attachment and applicable working accessory for incorrect installation, damage, deformation, binding, excessive wear, or contamination.
Do not operate visibly damaged accessories.
Expected outcome: The attachment and accessory are correctly installed and mechanically free, or a defective external component is identified.
5. Reseat or Substitute the Attachment
Reinstall the attachment and confirm positive engagement. When available, use a known-good compatible attachment or accessory to determine whether the problem follows the external component.
Expected outcome: Output returns to normal with the known-good attachment, or the issue remains with the handpiece.
6. Check Controls and Operating Mode
Confirm the trigger, selector, safety, and applicable mode controls move normally and are fully positioned. A selector between positions or a control that does not travel normally can create inconsistent performance.
Expected outcome: Controls are positioned correctly and provide consistent response.
7. Observe Operation Without Patient Load
Under controlled conditions, run the device through the appropriate operating range while listening and feeling for irregular speed, abnormal vibration, grinding, hesitation, or unexpected stopping.
Do not continue testing if the device overheats, produces an unusual odor, or sounds mechanically damaged.
Expected outcome: The handpiece operates smoothly and consistently, or an abnormal condition is confirmed.
8. Compare With a Known-Good TRS System
When possible, compare the same compatible external components on a known-good TRS system. Change one component at a time.
Expected outcome: The problem is isolated to the handpiece, power source, attachment, or working accessory.
9. Perform Applicable Performance Verification
If Clinical Engineering has an approved manufacturer or facility procedure for objective performance testing, perform it using suitable test equipment.
Do not invent a speed, torque, or other acceptance limit when no approved specification is available.
Expected outcome: The device meets the applicable approved performance requirement or is confirmed to require service.
10. Complete Final Verification or Remove From Service
After correcting an external issue, repeat operation through the intended controls and attachment configuration.
Expected outcome: Output is stable and repeatable. If weak or unstable performance remains, remove the device from service.
If the Problem Persists
Power source, accessory condition, attachment installation, control position, load, and external mechanical causes have been evaluated. Persistent poor performance may involve an internal motor, drive mechanism, electrical control, bearing, transmission, or other 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 or adjusted only by qualified personnel.
Do not continue operating a handpiece with abnormal vibration, grinding, heating, intermittent output, or repeated stopping under normal conditions. Perform full functional verification following repair.
Knowing when to stop external troubleshooting and escalate is proper troubleshooting.
Clinical Use Tip
If cutting or drilling performance changes unexpectedly during a case, exchange the power system rather than compensating with additional force.
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 had weak and intermittent powered performance during setup."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found that the installed power source reproduced the weak output while the handpiece operated normally with a known-good compatible power source."
Resolution
What action was taken.
Example:
"Removed the unreliable power source, verified stable TRS operation with a known-good replacement, and returned the handpiece to service."
Helpful Details to Include (If Known)
- Exact output symptom
- Handpiece and attachment used
- Working accessory condition
- Power source and charge condition
- Known-good power-source results
- Known-good attachment results
- Control or mode position
- Abnormal vibration or noise
- Whether the device stops under load
- Heat or odor
- Applicable performance-test results
- Final device status
Final Thought
Poor surgical power output should be isolated systematically between the power source, attachment, working accessory, controls, and handpiece. Verify external causes before assuming internal failure, and never return unstable equipment to clinical use without repeatable functional verification.
That is successful troubleshooting.