The reported issue was confirmed.The device was returned for evaluation.Visual inspection found a tear on the end of the stent.How and when the problem occurred could not be determined.The device history record was reviewed and found nothing that could have caused or contributed to the reported event.The instructions for use were found adequate and state the following: ¿method for use 1.(1) do not forcibly insert or remove the stent.It may injured patient or/and damage this product.(2) avoid improper handling of stent such as bending, kinking, tearing and etc.(3) avoid contact with sharp edges as this may cause damage to the stent.If grasping device is used, the stent should be removed from ureter first.Tearing of the stent can be caused by sharp instrument.(4) determine the proper stent length for the patient.Selection of too short a stent may result in migration.(5) in the event of stent migration , cystoscopy or ureteroscopy should be used to return the stent to the original position or removed it from the patient.(6) care should be exercise d when removing the stent to eliminate tearing or fragmentation.".
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