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The reported event is inconclusive.No sample was returned for evaluation.A potential root cause for this event could be, "material selection".The lot number was unknown; therefore, the device history record could not be reviewed.The instructions for use were found adequate and state the following: "potential complications associated with retrograde/antegrade positioning of indwelling ureteral stents include the following: edema; stone formation; peritonitis; extravasation; ureteral reflux ; stent dislogdgement, fragmentation, migration, occlusion; fistula formation; loss of renal function; hemorrhage; pain/discomfort; stent encrustation; hydronephrosis; perforation of kidney, renal pelvis, ureter and/or bladder; ureteral erosion; infection; urinary symptoms"."ureteral stents should be checked periodically for signs of encrustation and proper function.Periodic checks of the stent by cystoscopic and/or radiographic procedures are recommended at intervals deemed to be appropriate by the physician in consideration of the individual patient¿s condition and other patient specific factors.When long-term use is indicated, it is recommended that indwelling time not exceed 365 days.The stent is not intended as a permanent indwelling device." h11: section a through f - the information provided by bd represents all the known information at this time.Despite good faith efforts to obtain additional information, the complainant / reporter was unable or unwilling to provide any further patient, product, or procedural details to bd.
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