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The device was not returned to stryker sustainability solutions for evaluation.The facility stated the device was discarded.As the device was not returned for evaluation, an inspection was unable to be performed.A review of the dhr for the reported lot number supports that the device met all inspection and test criteria prior to release from stryker.The reported event could be attributed to: applying improper or unnecessary directional or rotational force to connect instrument to hand piece.Too much force or torque applied to instrument, or grasping/pulling.Incidental and prolonged activation against solid surfaces, such as bone, metal, or plastic.The instructions for use (ifu) state: use the torque wrench (already mounted to the shaft) to tighten the blade onto the hand piece.Turn the torque wrench clockwise while holding only the gray hand piece until it clicks twice indicating that sufficient torque has been applied to secure the blade.Do not attempt to bend, sharpen, or otherwise alter the shape of the blade.Doing so may cause blade failure and user or patient injury.Avoid contact with any and all other instruments while the instrument is activated.Contact with staples, clips, or other instruments while the instrument is activated may result in cracked or broken blades.Note: do not use any other means than the torque wrench to attach or detach the instrument from the hand piece.Note: do not torque the instrument by hand without the torque wrench, or damage may occur to the hand piece.The reported event will continue to be monitored through post-market surveillance.Should the device become available for return, the investigation will be reopened.
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It was reported, "the harmonic tip broke off in the cavity following activation/use." the tip was removed through the same incision, and an x-ray was not required to locate the piece.There was no patient injury or medical intervention, and extended procedure time was 10-15 minutes.These are commonly used devices that are readily available.
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