Combined passive and active neuromonitoring method and device
First Claim
1. A unitary sensor for detecting biopotential signals on the skin of a patient, the sensor comprising:
- a base strip including at least three electrodes spaced along the length of the base strip, each of the sensors being operable to detect biopotential signals on the skin of the patient; and
an extension strip integrally formed with the base strip and extending from the base strip to a distal end, the extension strip including an acoustic emitter attached to the distal end.
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Abstract
A method and system for combining active and passive neuromonitoring methods to measure biopotential signals in sedated ICU patients over the entire range of sedation from fully alert to the suppression of EEG. The system utilizes an integrated sensor that includes a sound generator and a plurality of EEG electrodes on a single, lightweight disposable component. The method of the present invention utilizes a control unit for switching between active and passive monitoring methods, depending upon the level of sedation. The control unit displays the results of active monitoring during levels of consciousness and light sedation and displays the results of passive monitoring during levels of deep sedation.
29 Citations
28 Claims
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1. A unitary sensor for detecting biopotential signals on the skin of a patient, the sensor comprising:
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a base strip including at least three electrodes spaced along the length of the base strip, each of the sensors being operable to detect biopotential signals on the skin of the patient; and
an extension strip integrally formed with the base strip and extending from the base strip to a distal end, the extension strip including an acoustic emitter attached to the distal end. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for monitoring the level of brain function in a patient from full awareness to deep drug-induced sleep, the system comprising:
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a control unit coupled to a display for displaying the level of brain function;
a unitary sensor positionable on the patient and coupled to the control unit, the sensor including at least three electrodes to detect biopotential signals on the skin of the patient and an acoustic emitter operable to deliver an acoustic stimulus to the patient;
a passive measurement module coupled to the control unit and operable to receive the biopotential signals from the unitary sensor and determine the level of brain function; and
an active measurement module coupled to the control unit and operable to activate the acoustic emitter to deliver acoustic stimuli and receive the biopotential signals from the unitary sensor to determine the level of brain function. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A system for monitoring the level of brain function in a patient from full awareness to deep drug-induced sleep, the system comprising:
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a control unit coupled to a display for displaying the level of brain function;
a sensor positionable on the patient and coupled to the control unit, the sensor including at least three electrodes to detect biopotential signals on the skin of the patient;
an acoustic emitter operable to deliver an acoustic stimulus to the patient;
a passive measurement module coupled to the control unit and operable to receive the biopotential signals from the sensor and determine the level of brain function; and
an active measurement module coupled to the control unit and operable to activate the acoustic emitter to deliver acoustic stimuli and receive the biopotential signals from the sensor to determine the level of brain function, wherein the control unit is operable to select between the active measurement module and the passive measurement such that the control unit displays the current level of brain function from only one of the active measurement module and the passive measurement module at any given time. - View Dependent Claims (18, 19, 20)
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21. A method for monitoring the depth of sedation in a patient from full awareness to deep drug-induced sleep characterized by the suppression of EEG, the method comprising the steps of:
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providing a passive measurement module operable to determine depth of sedation from full awareness to deep drug-induced sleep;
providing an active measurement module operable to determine depth of sedation from full awareness to the level of losing consciousness; and
means for combining the information from the active measurement module and the passive measurement module to obtain the best accuracy over the entire range of sedation. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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Specification