The device was returned to stryker sustainability solutions for evaluation.Visual inspection revealed evidence of clinical use and an indentation in the teflon pad was identified.The blade, jaw, teflon pad and contact rings appear to be intact.Functional inspection revealed the device successfully cut and coagulate without producing an error code nor emitting any adverse noise while the jaws were open.A review of the dhr supports that the device met all inspections and test criteria prior to release from stryker.Therefore, the most likely root causes are: - ancillary equipment issues (e.G.Generator, handpiece, and/or adaptor) - applying improper or inadequate directional and/or rotational force to connect instrument to hand piece.The instructions for use (ifu) state: - the instruments allow for the coagulation of vessels up to and including 5 mm in diameter.Do not attempt to seal vessels in excess of 5 mm in diameter.- care should be taken not to apply pressure between the instrument blade and tissue pad without having tissue between them.Clamping the tissue pad against the active blade without tissue on the full length of the blade will result in higher blade, clamp arm and distal shaft temperatures and can result in possible damage to the instrument.If this occurs, there may be an instrument failure, and the generator touchscreen displays a troubleshooting message.The reported event will continue to be monitored through post-market surveillance.
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It was reported that during use, two errors to release pressure occurred with harmonic scalpel (har36).The device would 'buzz' with tissue contact and another error would come up to release pressure.The same issue occurred with six devices used in this case.In total, 400cc of blood was lost in the laparoscopically assisted vaginal hysterectomy (lavh) and 200cc was lost in the bilateral tubal ligation (btl).No transfusion was required.A tube and ovary were removed due to being unable to make the devices work properly.In total, the procedure was delayed 30 minutes in the lavh and 20 minutes in the btl.The device was replaced.The patient's condition was stable post-procedure.These are commonly used devices that are readily available.
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