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(b)(6).(b)(4).Investigation-evaluation: a review of the complaint history, device history record, instructions for use, manufacturing records, quality control, and specifications of the device was conducted during the investigation.The device was not returned for visual inspection, it had been discarded by the customer at the conclusion of the case, therefore physical evaluation could not performed.A review of the device history record did not reveal any nonconformances associated with lot number 9130571.A review of complaint history records did not reveal any additional complaints associated with lot 9130571.There is no indication that a design process or related failure mode contributed to this event.Current controls for manufacturing are in place to assure functionality and device integrity prior to shipping.Per the quality engineering risk assessment , no further action is necessary as there is no evidence to suggest there is nonconforming product in house or in the field.Based on the information provided, no returned product, and the results of the investigation, a definitive cause could not be established.Cook will continue our monitoring of similar complaints and have notified the appropriate personnel of this event.This report includes information known at this time.A follow up report will be submitted should additional relevant information become available.
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