Blank fields on this form indicate the information is unknown, unavailable, or unchanged.Event summary: as reported, during inventory inspection, oxidation was detected on a perc ncircle nitinol tipless stone extractor.The issue was discovered by the distributor.Investigation - evaluation.Reviews of the complaint history, device history record, and quality control procedures and a visual inspection of the device were conducted during the investigation.The device was received for investigation in unopened packaging.Foreign matter was present near the handle.It was unclear whether foreign matter was the result of oxidation.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.There is no evidence of nonconforming devices from the complaint lot in house or in the field.The device is provided with instructions for use which state, ¿supplied sterilized by ethylene oxide gas in peel-open packages.Intended for one-time use.Sterile if package is unopened or undamaged.Do not use the product if there is doubt the product is sterile.Store in a dark, dry, cool place.Avoid extended exposure to light.Upon removal from package inspect the product to ensure no damage has occurred.¿ based on the available information, cook has concluded that the source of the foreign material could not be determined.Cook will continue monitoring of similar complaints and has notified the appropriate personnel of this event.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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