Internal complaint reference (b)(4).Results of investigation: the device, used in treatment, was returned for evaluation.Our investigation included a visual inspection of the device which confirms that the epoxy coating over the internal witness wire has degraded and has begun to come off.This failure mode has been previously identified.Since the manufacturing of the complaint device, design changes have been implemented to eliminate the occurrence of this failure.A complaint history review found related failures; this failure mode will be monitored for future complaints for any necessary corrective actions.A review of the manufacturing records did not reveal a manufacturing abnormality that could have caused or contributed to the reported incident.This device is a reusable instrument that can be exposed to numerous surgeries; damage from repeated use can occur.Expected wear/tear is likely the probable cause of the reported event.We recommend that all reusable instruments be routinely inspected for wear and damage and replaced as necessary.At this time, we have no reason to suspect that the product failed to meet any product specifications at the time of manufacture.
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