The reported 5.5mm i.D.Fixed tts" tracheostomy tube was returned for investigation, the device was returned with another tracheostomy tube.A review of the device history record, relevant to the reported lot, found that the device manufactured to specification and passed the quality insurance inspection with no defects being identified.Visual inspection of the returned device was performed by using the unaided eye under normal lighting and damage was observed on the inflation balloon.During inspection, gouges were observed on the section of the balloon where the valve is inserted.Additionally, it was noted that the inflation balloon had 1mm cuts on either side.Functional testing was performed by inflating the device balloon; however, the balloon was unable to inflate.Investigation found that the reported cuts were caused by damage incurred during use.(b)(4).
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