An implant card was received by the manufacturer reporting a full revision surgery of patient's vns system due to lead fracture and prophylactic replacement for the generator.The lead impedance after surgery was marked as ok.Additional information was received that the impedance was very high recently and surgery planned.During surgery, the surgeon wanted to test the connection between battery and electrode however, before they could do that the isolation of the lead got damaged during dissection so there was no point testing and they decided to immediately remove and replace the entire electrode.The surgeon reported that there was no obvious damage to the electrode, however, most likely it was indeed damaged but they were unable to pinpoint the exact spot of such damage as the electrode was removed in several pieces after opening both incisions.
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