(b)(4).Investigation - evaluation: a review of the complaint history, drawings, dimensional verification, device history record, manufacturing instructions, specifications, quality control and visual inspection of the returned device was conducted during the investigation.There is no evidence to suggest the product was not made to specifications.Review of device history record shows no nonconforming events which could contribute to this failure mode.It should be noted there were no other reported complaints for this lot number.The visual inspection of the returned device describes one used and elongated wire guide attached to a bard conquest dilation catheter.Total length is 284.0 cm.Distal length of wire guide to catheter is 22.6 cm.Catheter is 89.3 cm.Length of wire guide proximal to catheter is 175.5 cm.Od of wire guide is.03510 inches.Wire guide starts to elongate at 127.8 cm from the proximal end.A slight bend is noted at 50.5 cm from proximal end.Only the coil penetrates the catheter.The exposed core is 3.8 cm, just proximal to the catheter.Based on the information provided and the results of our investigation, a definitive root cause could not be determined.Since this device is inspected 100% for bends, kinks, adequate joint strength, correct outside dimension and other surface imperfections prior to transport, it is plausible to suggest that the wire guide met with resistance beyond its intended design during the procedurally related event, possibly inadvertent contact with the bevel of the needle during insertion and/or manipulation of the wire through the needle or may have been due to patient anatomy.We will continue to monitor for similar complaints.Per the quality engineering risk assessment no further action is required.
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