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Pma/510(k) #: pre-amendment (b)(4).Investigation - evaluation: a review of the complaint history, device history record, quality control, specifications, and a visual inspection of the returned device were conducted during the investigation.The visual inspection of the returned device confirmed that the safety wire broke from the distal weld, resulting in elongation of the coil in several areas in the distal portion of the guide.The weld connection was still present and connected to the coil confirming no portion of the guide remained in the patient.Additionally, a document based investigation evaluation was performed.There is no evidence to suggest the product was not made to specifications.A review of the device history record showed 1 nonconformance where 2 devices were scrapped for broken safety wire.This nonconformance is similar to the failure mode of the complaint device, but it is not related since these devices were scrapped during qc.It should be noted there were no other reported complaints for this lot number.It is unclear what caused the wire guide to separate.There are no additional details about the nephrostomy tube, but considering that the procedure was meant to replace the tube it is possible that the tube contained a tortuous path that caused the wire guide to elongate as it was being advanced and as the tube was being retrieved over the wire guide.Based on the information provided, the examination of the returned product, and the results of our investigation, a definitive root cause could not be determined.The appropriate personnel have been notified.We will continue to monitor for similar complaints.Per the quality engineering risk assessment, no further action is required.
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