Harmonic ace curved shears incert , ref# (b)(4), lot: m10170717, exp: 07/31/2019.A warning came across the harmonic machine that said release pressure on jaws then the jaws started on fire and burned on half of the jaws.The jaws where not in connection to any tissue at the time of event and the jaws were open.Essentially there was no pressure on the jaws.Instrument was removed from the pt as well as the jaw piece that burned off.Packaging and pieces retained and given to manager.Ultimately there was no patient harm.
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