Neural monitoring sensor
First Claim
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1. A sensing device for detecting an induced muscle event of a subject comprising:
- a mechanical sensor configured to be placed in contact with the skin of the subject, the mechanical sensor including an accelerometer configured to monitor an acceleration response of a muscle, the acceleration response including an acceleration attributable to a depolarization of a nerve innervating the muscle the mechanical sensor further configured to provide a mechanomyography output signal corresponding to the monitored muscle acceleration response;
wherein the sensing device is configured to detect the induced muscle event from the mechanomyography output signal, the induced muscle event being attributable to the depolarization of the nerve innervating the muscle in response to a provided electrical stimulus;
wherein detecting the induced muscle event includes calculating a time derivative of acceleration from the mechanomyography output signal, and comparing time derivative of acceleration to a threshold.
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Abstract
A sensing device for detecting a muscle event includes a mechanical sensor, such as an accelerometer, that is configured to provide a signal corresponding to a mechanical movement of a muscle, a plurality of electrodes disposed on the sensing device; and a contact detection device coupled with the plurality of electrodes and configured to detect if the sensing device is in contact with a subject.
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Citations
23 Claims
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1. A sensing device for detecting an induced muscle event of a subject comprising:
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a mechanical sensor configured to be placed in contact with the skin of the subject, the mechanical sensor including an accelerometer configured to monitor an acceleration response of a muscle, the acceleration response including an acceleration attributable to a depolarization of a nerve innervating the muscle the mechanical sensor further configured to provide a mechanomyography output signal corresponding to the monitored muscle acceleration response; wherein the sensing device is configured to detect the induced muscle event from the mechanomyography output signal, the induced muscle event being attributable to the depolarization of the nerve innervating the muscle in response to a provided electrical stimulus; wherein detecting the induced muscle event includes calculating a time derivative of acceleration from the mechanomyography output signal, and comparing time derivative of acceleration to a threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A sensing device for detecting an induced muscle event of a subject comprising:
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a mechanical sensor configured to provide a mechanomyography output signal corresponding to a mechanical response of a muscle of the subject, the mechanical response being attributable to a depolarization of a nerve innervating the muscle; an electrical sensor configured to monitor an electrical parameter of the subject, the electrical sensor including a plurality of electrodes; and a contact detection device coupled to the electrical sensor and configured to detect if the sensing device is in physical contact with the subject; and a receiver in communication with the mechanical sensor and the contact detection device;
the receiver configured to;receive the mechanomyography output signal from the mechanical sensor; detect the of an induced muscle event from the received mechanomyography output signal, the induced muscle event being attributable to the depolarization of the nerve innervating the muscle in response to a provided electrical stimulus; provide an alert if an induced muscle event is detected; and wherein the receiver is configured to detect the induced muscle event by calculating a time derivative of acceleration from the mechanomyography output signal, and comparing the calculated-time derivative of acceleration to a threshold. - View Dependent Claims (17, 18, 19, 20)
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21. A system comprising:
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a mechanical sensor configured to be placed in contact with the skin of the subject, the mechanical sensor including an accelerometer configured to monitor an acceleration response of a muscle, the acceleration response including a response attributable to a depolarization of a nerve innervating the muscle, the mechanical sensor further configured to provide a mechanomyography output signal corresponding to the monitored muscle acceleration response; a receiver configured to detect an induced muscle event from the mechanomyography output signal, the induced muscle event being attributable to the depolarization of the nerve innervating the muscle in response to a provided electrical stimulus; and wherein the receiver is configured to detect the induced muscle event by calculating a time derivative of acceleration from the mechanomyography output signal, and comparing the calculated-time derivative of acceleration to a threshold. - View Dependent Claims (22, 23)
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Specification