The investigation has been completed and the results are following.A nurse reported that the chest strap buckle of the arjo rotoprone device was defective.An arjo representative who visited the customer found that the red button, from the buckle, jammed resulting in inability to disconnect the two components (female and male components).The buckle strap had to be cut in order to open the chest proning pack.There was no injury in relation to this event.The patient was transferred to another bed.The faulty bed was returned to the arjo service center where buckle, a faulty component, was replaced.The faulty component was further inspected.The buckle was opened up to examine the internal parts.It was found that the red button had 2 hinges broken (one broke away and the other was missing).According to arjo service technician the red button could have been pushed down but the buckle would not release.The inspection conclusion was that the damaged and missing hinges would prevent the button from functioning properly.It was confirmed that the buckle failure was related with a mechanical failure.Before the bed was released to the customer it went through quality process on (b)(6) 2019 in order to ensure the bed is in working order and ready for next rent.No anomalous condition was detected.It is unknown when and how the buckle was damaged.While reviewing complaints for the last 5 years we have found 6 complaints regarding buckle inability to open due to mechanical failure.To sum up, when the event occurred the device failed to meet its performance specification since buckle could not be opened due to mechanical failure.The device was used for patient treatment during the event therefore was directly involved in the event.
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