As reported, during a transurethral ureteroscopic ureterolithotomy, the basket of an ngage nitinol stone extractor would not open.The device was tested prior to making contact with the patient when the issue was discovered.The procedure was completed with a new basket without difficulty.There was no impact to the patient.
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Summary of event: as reported, during a transurethral ureteroscopic ureterolithotomy, the basket of an ngage nitinol stone extractor would not open.The device was tested prior to making contact with the patient when the issue was discovered.The procedure was completed with a new basket without difficulty.There was no impact to the patient.Investigation evaluation: reviews of the complaint history, device history record, instructions for use (ifu), manufacturing instructions, and quality control procedures were conducted during the investigation.A visual inspection and functional test of the returned complaint device was also conducted.The complaint device was returned to cook for investigation in open packaging.All fittings were tight and the basket handle would not actuate the basket.Several kinks were noted in the basket sheath at approximately 43.5 centimeters and 55 centimeters from the support sheath.The handle was disassembled and the basket could not be actuated manually.A document-based investigation evaluation was performed.No related non-conformances were recorded, and there have been no other reported complaints for this lot number.The device history record review provides objective evidence that the device was manufactured to specification.There is no evidence of nonconforming devices from the complaint lot in house or in the field.A review of relevant manufacturing documents was conducted.It was concluded that the device aspect in question was functionally inspected by quality control and no notable gaps in production or processing controls were noted.There is no indication that a design or process related failure mode contributed to the reported event.Sufficient inspection activities are in place to identify this failure mode prior to distribution.Cook also reviewed the product labeling.The instructions for use (ifu) provides the following information to the user related to the reported failure mode: important: enclose device in sheath before removing from tray/holder.Important: excessive force could damage device.The returned device was found to have a basket that was closed and could not be opened due to sheath damage.The basket sheath was kinked in multiple locations.The kinks were preventing the basket assembly from moving freely within the basket sheath.The cause for the damage is unknown.Excessive force may have been inadvertently applied to the device, however no information was known regarding device handling, therefore the cause of the issue could not be conclusively determined.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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