(b)(6) 2015 the patient was implanted with rns sn (b)(4) and two cortical strip leads (sn b)(4) was secured to port #1 of the rns and placed in the left sub temporal region, sn (b)(4) was secured to port #2 of the rns and placed in the right sub temporal region).Both leads were secured with a titanium dog bone.The doctor placed a piece of catheter around middle of each dog bone to cushion/protect the lead.On (b)(6) 2016 during a routine review of ecogs, fce noticed abnormal looking signal / artifact on channels 1 and 2 (left sub temporal strip).The abnormal activity appears to have started on (b)(6) 2016, but possibly as early as (b)(6) 2016, but with less frequency.Patient visit on (b)(6) 2016, impedance measurements were taken and a real time ecogs was recorded.One of the impedance measurements came back as insufficient charge.During real time ecog, the site was able to palpate above the left ear and create artifact.There are 2 user saved ecogs in pdms from (b)(6) 2016 that show this phenomenon.Detection and stimulation were turned off on the left lead.The right lead has detection and stimulation enabled.(b)(6) 2016 lead revision was performed.Fce reported that the explanted lead had been secured with a titanium dog bone.Investigation confirmed two lead fractures from the explanted strip lead the first fracture appears to have been a result of the surgical explant and the second fracture was most likely a result of the use of a dogbone to secure the lead.
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