Systems to detect vagus capture
First Claim
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1. A system for delivering neurostimulation to a body having a vagus nerve, a recurrent laryngeal nerve and laryngeal muscles, the system comprising:
- a lead configured to be implanted in the body;
a stimulation output circuit configured to deliver neurostimulation pulses to the vagus nerve through the lead;
an EMG sensing circuit configured to use the lead to sense EMG signals from laryngeal muscle activity; and
an evoked muscular response detection circuit configured to use the EMG signals sensed by the EMG sensing circuit to detect evoked laryngeal muscle activity evoked by the neurostimulation pulses,wherein the lead includes a vagal nerve cuff and the nerve cuff includes recording electrodes configured to be used to sense EMG signals from laryngeal muscle activity.
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Abstract
Some embodiments provide a system for delivering neurostimulation. Some system embodiments comprise a lead configured to be implanted in the body, a stimulation output circuit configured to deliver neurostimulation pulses to the vagus nerve through the lead, an EMG sensing circuit configured to use the lead to sense EMG signals from laryngeal muscle activity, and an evoked muscular response detection circuit configured to use the EMG signals sensed by the EMG sensing circuit to detect evoked laryngeal muscle activity evoked by the neurostimulation pulse.
30 Citations
20 Claims
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1. A system for delivering neurostimulation to a body having a vagus nerve, a recurrent laryngeal nerve and laryngeal muscles, the system comprising:
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a lead configured to be implanted in the body; a stimulation output circuit configured to deliver neurostimulation pulses to the vagus nerve through the lead; an EMG sensing circuit configured to use the lead to sense EMG signals from laryngeal muscle activity; and an evoked muscular response detection circuit configured to use the EMG signals sensed by the EMG sensing circuit to detect evoked laryngeal muscle activity evoked by the neurostimulation pulses, wherein the lead includes a vagal nerve cuff and the nerve cuff includes recording electrodes configured to be used to sense EMG signals from laryngeal muscle activity. - View Dependent Claims (2)
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3. A system for delivering neurostimulation to a body having a vagus nerve, a recurrent laryngeal nerve and laryngeal muscles, the system comprising:
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a lead configured to be implanted in the body; a stimulation output circuit configured to deliver neurostimulation pulses to the vagus nerve through the lead; an EMG sensing circuit configured to use the lead to sense EMG signals from laryngeal muscle activity; and an evoked muscular response detection circuit configured to use the EMG signals sensed by the EMG sensing circuit to detect evoked laryngeal muscle activity evoked by the neurostimulation pulses, wherein the evoked muscular response detection circuit comprises; a detection timer configured to time a delay interval after delivery of one of the neurostimulation pulses, and configured to time a detection window starting upon expiration of the delay interval; and a comparator configured to detect the evoked laryngeal muscle activity by comparing the EMG signals sensed by the EMG sensing circuit within the detection window to a template or by comparing a value derived from the EMG signals sensed by the EMG sensing circuit within the detection window to a threshold value. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A system for delivering neurostimulation to a body having a vagus nerve, a recurrent laryngeal nerve and laryngeal muscles, the system comprising:
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a lead configured to be implanted in the body; a stimulation output circuit configured to deliver neurostimulation pulses to the vagus nerve through the lead; an EMG sensing circuit configured to use the lead to sense EMG signals from laryngeal muscle activity; an evoked muscular response detection circuit configured to use the EMG signals sensed by the EMG sensing circuit to detect evoked laryngeal muscle activity evoked by the neurostimulation pulses; and a control circuit connected to the evoked muscular response detection circuit and the stimulation output circuit, and configured to adjust a parameter of the neurostimulation pulses to evoke desired laryngeal muscle activity. - View Dependent Claims (20)
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Specification