Additional information: (method, results, conclusions) - the returned retractor blade was evaluated.It was found that the shim has disassembled from the device.There were no other signs of damage on the device.A review of the manufacturing records did not identify any issues which would have contributed to this event.The labeling was reviewed and found to contain instructions regarding proper device usage.The event is stated to have occurred outside of surgery; however, the specific details concerning the shim insertion and removal are unavailable despite due diligence.As such, the cause cannot be conclusively determined.Failures of this nature are often attributed to greater than expected forces being used during either the shim insertion or removal process causing the shim the detach from the blade.
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