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(b)(4).Investigation - evaluation: a review of the complaint history, functional test, device history record, documentation, instructions for use (ifu), manufacturing instructions, specifications, trends, quality control and visual inspection of the returned device was conducted during the investigation.The device is shipped with an instruction for use (ifu) that describes the intended use, specific items are addressed such as: the instructions for sheath introduction includes the following, how supplied: upon removal from package, inspect the product to ensure no damage has occurred.Sheath introduction: using the side-arm of the valve, flush the introducer by filling the introducer assembly completely with heparinized saline.The visual inspection of the returned device reported one used sheath was returned for investigation with an inserted dilator.After removing the dilator and flushing the sheath, a leak test was performed by occluding the sheath tubing with hemostats and injecting water with a syringe through the connecting tube assembly.Leakage was confirmed at the connection between the cap and shaft of the sheath.The cap was then separated from the check-flo assembly, so that the flare could be observed.Holes were found in the sheath material at the distal end of the flare.The complaint device was returned therefore, an investigation evaluation was performed.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.Based on the information provided, and the results of our investigation, the root cause was determined to be manufacturing related.We will continue to monitor for similar complaints.Per the quality engineering risk assessment no further action is required.
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