The suspect tracheostomy tube was returned to the manufacturer for evaluation.During functional testing, the cuff was infalted with 10cc of air.The device was then submerged in water.Bubbles were observed escaping from the device cuff.Visual inspection revealed a small cut in the cuff material.No other damages or issues were found with the returned device.Review of the device history record revealed no non-conformities during manufacturing.Manufacturing performs a 100% leak check prior to product release, had the cuff been cut at that time, the leak would have been detected and the device scrapped.No evidence was found to suggest the reported product fault was related to a manufacturing issue; however, the root cause for the damaged cuff could not be determined.(b)(4).
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