Method and apparatus for detecting vagus nerve stimulation
First Claim
1. A method for non-invasive detection of a vagus nerve stimulation signal, the method comprising the following steps:
- applying external electrodes to a patient in proximity to an implanted vagus nerve stimulator;
detecting a vagus nerve stimulation signal applied by the stimulator to the patient with said electrodes;
amplifying the detected vagus nerve stimulation signal;
filtering the detected vagus nerve stimulation signal in a bandwidth selected to eliminate extraneous noise; and
prolonging the detected signal to allow sampling of the vagus nerve stimulation signal and to trigger sampling of at least one other physiological signal to allow for monitoring the effect of the vagus nerve stimulation on the at least one other physiological signal.
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Abstract
A method and apparatus for monitoring the application of a vagus nerve stimulation signal includes a detection circuit having an amplifier, a filter, and a signal prolongation circuit. The signal prolongation circuit rectifies a detected vagus nerve signal and provides the signal to a Schmitt trigger extending the length of the signal. Because of the prolongation of the signal, the signal can be sampled at a relatively low rate, and real time data illustrating the response of various physiological signals to the application of the vagus nerve signal can be monitored, thereby providing clinical data for monitoring and adjusting the applied stimulation.
123 Citations
13 Claims
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1. A method for non-invasive detection of a vagus nerve stimulation signal, the method comprising the following steps:
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applying external electrodes to a patient in proximity to an implanted vagus nerve stimulator; detecting a vagus nerve stimulation signal applied by the stimulator to the patient with said electrodes; amplifying the detected vagus nerve stimulation signal; filtering the detected vagus nerve stimulation signal in a bandwidth selected to eliminate extraneous noise; and prolonging the detected signal to allow sampling of the vagus nerve stimulation signal and to trigger sampling of at least one other physiological signal to allow for monitoring the effect of the vagus nerve stimulation on the at least one other physiological signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification