(b)(4).A review of the documentation, instructions for use (ifu), specifications, and visual inspection of the returned device was conducted during the investigation.One bakri tamponade balloon catheter was returned for investigation.A visual examination of the returned device noted the balloon catheter had an unidentified tube inserted into the inlet, blocking the inflation lumen.An attempt to deflate the balloon with the unidentified device in place was unsuccessful.The lot number of the device is not known; accordingly a review of the device history record could not be conducted.Based on the information provided and the results of our investigation, a definitive root cause could not be determined.Per the quality engineering risk assessment, no further action is warranted.Monitoring will continue to be performed for similar complaints.
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