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Blank fields on this form indicate the information is unknown, unchanged, or unavailable.Investigation ¿ evaluation.A visual inspection of the returned device was conducted.A document based investigation was also performed including a review of complaint history, device history record, the instructions for use, manufacturing instructions, specifications, and quality control data.One device was returned for investigation.The returned packaging confirms the reported complaint device lot number.Visual examination confirmed a 5 fr 22cm stent was returned in unused condition.The stent was returned without the tether.The stent was torn on the proximal coil.Closer examination revealed that the tear originated at the last side port and measured 1cm long.The tear continued through the end of the coil.There was no other damage found on the stent.The stent was damaged during tether removal.A review of the device history record found no non-conformances related to the reported failure mode.Because there are no related non-conformances, adequate inspection activities have been established, there is objective evidence that the dhr was fully executed, and no other related complaints from the lot have been received from the field, it was concluded that there is no evidence that nonconforming product exists in house or in field.A review of complaint history records shows no other complaints associated with the complaint device lot.The instructions for use (ifu), provides the following information to the user related to the reported failure mode: the tether should be removed if the stent is to remain indwelling longer than 14 days.A review of relevant manufacturing documents was conducted.It was concluded that the device aspect in question was visually/functionally inspected by quality control and no related gaps in production or processing controls were noted.A universa soft stent was returned for evaluation the stent was returned with open packaging and was missing the tether.The stent was inspected and found to have a 1 cm tear on the proximal coil.The tear goes from the last side port of the stent to proximal tip of the stent.The last side port on the proximal coil is also where the tether is specified to be attached to the stent.The ifu supplied with the device states the tether should be removed if the stent is to remain indwelling longer than 14 days.The cause of the complaint could not be established.Per the quality engineering risk assessment, no further action is warranted.Cook medical will continue to monitor this device via the complaints database for similar complaints.This report is required by the fda under 21 cfr part 803.This report is based on unconfirmed information submitted by others.Neither the submission of this report nor any statement made in it is intended to be an admission that any cook device is defective or malfunctioned; that a death or serious injury occurred; or that any cook device caused or contributed to; or is likely to cause or contribute to a death or serious injury if a malfunction occurred.
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