It was reported that during an implantable neurostimulator (ins) replacement the patient experienced a sudden shocking sensation with heavy muscular contraction on the right side of the body from head to toes, including heavy contraction or right corner of mouth/cheek, and the patient was unable to speak normally for approximately 4-5 minutes after the event.The patient did not feel any pain or heat during the contraction or afterwards.The pocket was not fully open at the time of the shocking, and the surgeon noted they could not see the ins or extension at that time.The surgeon was using a radiofrequency electrosurgical instrument at the time of the event, and the event occurred while the old (almost depleted) ins was still connected to the system.The ins was not turned off prior to the procedure.A patient return electrode was placed on the patient's right upper thigh top.The electrosurgical smoke evacuator and remote switch activator were not in use at the time of the event.It was also noted the surgery took place with patient awake using local anesthetic.The replacement was completed with closure of the battery pocket.After about 5 minutes, the patient felt normal again, and no burning was detected around the ins pocket, nor along extension or lead paths.Impedance check confirmed impedances were in normal range.The patient was implanted for parkinson's disease.
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