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Correction: d8, d9, g1 - mfg site postal code- blank.Investigation evaluation: it was reported during an unspecified procedure; the physician observed the flexor ureteral access sheath and dilators was falling or detaching (the inner lining was separating from the sheath).The patient did not require any additional procedures due to this occurrence.The complainant has not reported any adverse effects on the patient due to this occurrence.Reviews of documentation including the complaint history, device history record (dhr), quality control procedures, and instructions for use (ifu) were conducted during the investigation.The complaint device was not returned; therefore, no physical examinations could be performed.A picture of the device was supplied by the user that showed the inner liner of the sheath had detached.Additionally, a document-based investigation evaluation was performed.A review of the device master record (dmr) concluded that sufficient inspection activities are in place to identify this failure mode prior to distribution.A review of the device history record (dhr) found no non-conformances related to the reported failure mode.A review of complaint history records shows no other related complaints associated with device lot.Based on the available information, cook has concluded that the device was manufactured to specification and that there is no evidence suggesting nonconforming product exists either in house or in the field.The product ifu did not provide any information related to the reported issue.Based on the information provided, no product returned, and the results of the investigation, the cause of the issue was not conclusively established.It is possible that other devices inserted through the scope peeled the liner, however, no information was known about other devices used in the procedure.The appropriate personnel have been notified, and cook will continue to monitor for similar events.Per the quality engineering risk assessment, no further action is required.This report is required by the fda under 21 cfr part 803 and is based on unconfirmed information submitted by others.Neither the submission of this report nor any statement contained herein is intended to be an admission that any cook device is defective or malfunctioned, that a death or serious injury occurred, nor that any cook device caused, contributed to, or is likely to cause or contribute to a death or serious injury if a malfunction occurred.
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