Investigation - evaluation: a review of the complaint history, functional test, device history record, quality control and visual inspection of the returned device was conducted during the investigation.The visual inspection of the returned device reported using a microscope; a hole was visible in the balloon material.A functional test was performed.Using a syringe, the balloon was inflated with water; a leak was noted in the balloon.The complaint device was returned therefore, an investigation evaluation was performed.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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