It was reported that the patient experienced a shocking or jolting sensation.After an upgrade to a rechargeable implantable neurostimulator (ins), the patient experienced shocking and jolting down their right arm.Impedance testing was performed and all measurements were within normal ranges.It was noted that the patient required fairly high amplitudes to control essential tremor.Amplitude was decreased, which resulted in a ¿less extreme¿ shock.The patient was programmed in bipolar mode in both hemispheres.The ins was implanted in the left pectoral region.The patient reported the shocking sensation was similar to what was felt when stimulation was being switched from off to on.Postural changes did not seem to cause or alleviate the shocking.The patient was admitted to the hospital.Stimulation to the left brain was decreased from 5.4 v to 4.0 v, after which the patient no longer experienced the shocking sensation, but the patient then experienced compromised therapy to their right side.Impedances were checked again and were still within normal ranges.Impedances were as follows: c<(>&<)>0 868, c<(>&<)>1 820, c<(>&<)>2 883, c<(>&<)>3 498, 0 <(>&<)>1 1168, 0<(>&<)>2 1353, 0<(>&<)>3 1097, 1<(>&<)>2 1168, 1<(>&<)>3 1016, 2<(>&<)>3 1022, c<(>&<)>4 846, c<(>&<)>5 698, c <(>&<)>6 692, c<(>&<)>7 736, 4<(>&<)>5 907, 4<(>&<)>6 1068, 4<(>&<)>7 1168, 5<(>&<)>6 768, 5<(>&<)>7 968, 6<(>&<)>7 816.Therapy impedances were also measured and within normal ranges.Exploratory surgery was performed on (b)(6) 2014.Impedances were again tested on the left brain lead and both extensions and all impedances were within normal range.The ins and pocket adaptor were explanted and replaced.Since the replacement, the patient had not experienced any further shocks.The patient recovered fully.
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Concomitant medical products: product id 64002, implanted: (b)(6) 2010, explanted: (b)(6) 2014, product type: adapter.Product id 3550-29, product type: accessory.Analysis of implantable neurostimulator model 37612 sn: (b)(4) found no anomalies.
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