Although the dhr could not be reviewed because the lot number remains unknown, there are controls in the manufacturing process to ensure the product met specifications upon release.The subject device is not available; therefore, visual and functional testing as well as physical analysis cannot be performed.The reported complaint could not be confirmed, and it could not be definitively determined if the device failed to meet specifications because the product was not returned.The reported event is covered in the device directions for use (dfu).As well, the risk of the reported event is documented in the risk documentation and there are current controls to mitigate the risk of the as reported event.Additional information provided by the customer indicated the patient anatomy was very tortuous and no resistance encountered during the procedure.There was no product abnormality before use, and there were no procedural problems.While there are a number of potential causes for the reported issue, because review of available information failed to identify a definitive cause and the device was not returned, a cause of 'undeterminable' shall be assigned to the as reported events.
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