H10 h3, h6: the device, used for treatment, was returned for evaluation.The field report noted that two bone pins were bent.The other bone pin was investigated under (b)(4).Visual inspection confirmed that the bone pin was bent on the threads about 1.2 inches from the bottom.A review of the device history records showed there were no indications to suggest that the product did not meet manufacturing specification or would not be able to perform as intended.A complaint history review identified 13 prior similar events.This failure mode will be trended to assess for any necessary corrective actions.We were able to confirm there was a relationship established between the reported event and the device.The malfunction was likely due to mechanical component failure.Factors that could have contributed to the reported event include the user allowing the weight of the drill to fall as it is attached to the pin, if the bone pin is held rigidly in place during removal, or if the patient's bone is harder than normal.The navio system for unicondylar knee replacement user's manual provides detailed instructions for placing the bone pins and tracker arrays.The user is instructed to keep the drill in line with the pin when attaching/detaching.
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