Patent ID: 8606355

Claim:
A system of detecting displacement of an implanted neurological lead having an electrode for delivering electrical stimuli and sensing, the system comprising: means for delivering electrical stimulation through the neurological lead to laryngeal tissue; means for sensing laryngeal activity to produce an electromyogram (EMG) waveform; means for storing the EMG waveform sensed at the time of implantation as a baseline pattern; means for sensing laryngeal activity to produce an EMG waveform at a time subsequent to implantation; means for storing the EMG waveform sensed at the time subsequent to implantation as a subsequent pattern; means for comparing the baseline pattern and the subsequent pattern; means for determining whether laryngeal activity decreased in the subsequent pattern from the baseline pattern; and means for decreasing electrical stimulation delivered through the neurological lead in response to determining decreased laryngeal activity.