NEURAL MONITORING SYSTEM
First Claim
1. A neural monitoring system for detecting an induced response of a muscle to a stimulus provided within an intracorporeal treatment area of a human subject, the intracorporeal treatment area including a nerve that innervates the muscle, the neural monitoring system comprising:
- a mechanical sensor configured to be placed in mechanical communication with the muscle and to generate a mechanomyography output signal corresponding to a sensed mechanical movement of the muscle; and
a receiver in communication with the mechanical sensor and configured to;
receive the mechanomyography output signal from the mechanical sensor;
compute a time derivative of an acceleration of the muscle from the mechanomyography output signal;
compare the computed time derivative of acceleration to a jerk threshold; and
indicate that the sensed mechanical movement of the muscle was induced by the provided intracorporeal stimulus if the computed time derivative of acceleration exceeds the jerk threshold.
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Abstract
A neural monitoring system for detecting an induced response of a muscle to a stimulus provided within an intracorporeal treatment area of a human subject includes a mechanical sensor configured to be placed in mechanical communication with the muscle and to generate a mechanomyography output signal corresponding to a sensed mechanical movement of the muscle, and a receiver in communication with the mechanical sensor. The receiver is configured to: receive the mechanomyography output signal from the mechanical sensor; compute a time derivative of an acceleration of the muscle from the mechanomyography output signal; compare the computed time derivative of acceleration to a jerk threshold; and indicate that the sensed mechanical movement of the muscle was induced by the provided intracorporeal stimulus if the computed time derivative of acceleration exceeds the jerk threshold.
40 Citations
20 Claims
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1. A neural monitoring system for detecting an induced response of a muscle to a stimulus provided within an intracorporeal treatment area of a human subject, the intracorporeal treatment area including a nerve that innervates the muscle, the neural monitoring system comprising:
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a mechanical sensor configured to be placed in mechanical communication with the muscle and to generate a mechanomyography output signal corresponding to a sensed mechanical movement of the muscle; and a receiver in communication with the mechanical sensor and configured to; receive the mechanomyography output signal from the mechanical sensor; compute a time derivative of an acceleration of the muscle from the mechanomyography output signal; compare the computed time derivative of acceleration to a jerk threshold; and indicate that the sensed mechanical movement of the muscle was induced by the provided intracorporeal stimulus if the computed time derivative of acceleration exceeds the jerk threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of detecting an induced response of a muscle to a stimulus provided within an intracorporeal treatment area of a human subject, the intracorporeal treatment area including a nerve that innervates the muscle, the method comprising:
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receiving a mechanomyography output signal from a mechanical sensor in mechanical communication with the muscle, the mechanomyography output signal corresponding to a mechanical movement of the muscle sensed by the mechanical sensor; computing a time derivative of an acceleration of the muscle from the mechanomyography output signal; comparing the computed time derivative of acceleration to a jerk threshold; and indicating that the sensed mechanical movement of the muscle was induced by the provided intracorporeal stimulus if the computed time derivative of acceleration exceeds the jerk threshold. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A neural monitoring system for detecting an induced response of a muscle to a stimulus provided within an intracorporeal treatment area of a human subject, the intracorporeal treatment area including a nerve that innervates the muscle, the neural monitoring system comprising:
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a mechanical sensor configured to be placed in mechanical communication with the muscle and to generate a mechanomyography output signal corresponding to a sensed mechanical movement of the muscle; and a receiver in communication with the mechanical sensor and configured to; receive the mechanomyography output signal from the mechanical sensor; determine a magnitude of acceleration of the muscle from the mechanomyography output signal; determine a magnitude of the provided intracorporeal stimulus; compute a time derivative of an acceleration of the muscle from the mechanomyography output signal; compare the computed time derivative of acceleration to a jerk threshold; determine a proximity between the stimulator and the nerve from the magnitude of the provided intracorporeal stimulus and the magnitude of acceleration of the muscle; compare the determined proximity to a proximity threshold; and provide an alert if the determined proximity is less than the proximity threshold and the computed time derivative of acceleration exceeds the jerk threshold. - View Dependent Claims (20)
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Specification