This mdr was generated under protocol (b)(4), as a result of warning letter cms# (b)(4).No problems or issues were identified during this device history record review.Visual and functional testing were performed.Two (2) samples were received in used conditions, without its original packaging and with its certificate of safe handling.The sample was visually inspected at a distance of 12 inches under normal lighting to received unit.According with visual inspection, condition reported in complaint is visible, however, this does not assure us that there is still a failure of the process, according to the description of the complaint, the patient chewed through the cuff, it is clearly seen in the images marks or perforations caused by teeth causing leakage in the air valve.Based on this the failure mode cannot be confirmed.A review of the manufacturing process for was conducted by quality engineer in order to verify that there are no situations or practices that could create the event.No discrepancies were found.The root cause of the reported issue was found to be that the damaged occurred by the customer after the product left the facilities due to parts are 100% tested by leak and cuff symmetry test and the valve is needed to inflate the cuff.No corrective actions were taken since the investigation did not reveal that the defect was caused during the manufacturing process.
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