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Investigation - evaluation: clinical assessment: summary of the event: it was reported that ¿during the introduction of the sheath in the natural ways, the distal tip end has deteriorated.This has led to the patient's ureter injury of 2-3 cm.¿ and the ¿representative confirmed on 05 october 2016; according to the message of pharmacy, they put a stent into the ureter to practice healing.¿ clinical opinion of the event: based on the limited available information the exact cause of the issue is not clear for it may be contributed by patient¿s disease/clinical state, healthcare professional¿s technique/procedure, or the malfunction of the device itself.A review of the complaint history, device history record, documentation, specifications, trends, quality control and visual inspection of photos of the device was conducted during the investigation.According to the message of pharmacy, they put a stent into the ureter to practice healing.There is no indication that a design or process related failure mode contributed to this event.Review of production and quality documentation did not observe any specific issues with current manufacturing or quality controls that may have contributed to this incident.The device was not returned for evaluation.A visual examination of the check-in photos appear to show that the tip is damaged.There is no evidence to suggest the product was not made to specifications.Review of device history record shows no nonconforming events which could contribute to this failure mode.It should be noted there were no other reported complaints for this lot number.Based on the information provided, no product returned and the results of our investigation, a definitive root cause could not be determined.We will continue to monitor for similar complaints.Per the quality engineering risk assessment no further action is required.
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