Devices and methods for monitoring cerebral hemodynamic conditions
First Claim
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1. A headset apparatus, comprising:
- a retainer;
a first electrode configured to connect to the retainer at a first position;
a second electrode configured to connect to the retainer at a second position;
the retainer comprising a substantially inflexible portion shaped to fit a temporal region of a head of a subject, the temporal region being adjacent to an ear of the subject, the portion being shaped to maintain, when the retainer is oriented on the head of the subject;
a position of the first electrode anterior to a middle cerebral artery (MCA) of the subject and opposing an anterior horn of a lateral cerebral ventricle, anda position of the second electrode posterior to the MCA, above the ear of the subject, and opposing a posterior horn of the lateral cerebral ventricle; and
at least one electrical conductor enabling the first electrode and the second electrode to be connected in a circuit, such that when the first electrode is in the first position and the second electrode is in the second position and the first and second electrodes are connected to a circuit through which current flows, the retainer, the first electrode, and the second electrode cooperate to enable current to flow from one of the first and second electrodes on a first side of the MCA through the lateral cerebral ventricle and to another of the first and second electrodes on a second side of the MCA, opposite the first side, wherein the retainer is adapted to maintain relative positions of the first electrode and the second electrode with respect to one another.
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Abstract
Devices, and methods for measuring bioimpedance signals are disclosed. One aspect may include a headset apparatus including a retainer and electrodes. The retainer may be configured to position the electrodes on the head of a subject so as to obtain bioimpedance signals indicative of hemodynamic conditions associated with an MCA territory. A processor may be included to measure and analyze the obtained bioimpedance signals, and to output information for predicting hemodynamic conditions associated with an MCA territory.
5 Citations
22 Claims
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1. A headset apparatus, comprising:
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a retainer; a first electrode configured to connect to the retainer at a first position; a second electrode configured to connect to the retainer at a second position; the retainer comprising a substantially inflexible portion shaped to fit a temporal region of a head of a subject, the temporal region being adjacent to an ear of the subject, the portion being shaped to maintain, when the retainer is oriented on the head of the subject; a position of the first electrode anterior to a middle cerebral artery (MCA) of the subject and opposing an anterior horn of a lateral cerebral ventricle, and a position of the second electrode posterior to the MCA, above the ear of the subject, and opposing a posterior horn of the lateral cerebral ventricle; and at least one electrical conductor enabling the first electrode and the second electrode to be connected in a circuit, such that when the first electrode is in the first position and the second electrode is in the second position and the first and second electrodes are connected to a circuit through which current flows, the retainer, the first electrode, and the second electrode cooperate to enable current to flow from one of the first and second electrodes on a first side of the MCA through the lateral cerebral ventricle and to another of the first and second electrodes on a second side of the MCA, opposite the first side, wherein the retainer is adapted to maintain relative positions of the first electrode and the second electrode with respect to one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for predicting a hemodynamic condition associated with a middle cerebral artery (MCA) an MCA territory, the method comprising:
- orienting a retainer on the head of the subject, the retainer comprising a substantially inflexible portion shaped to fit a temporal region of a head of a subject, the temporal region being adjacent to an ear of the subject, the portion shaped to maintain;
positioning a first electrode connected to the retainer at a first position on a head of a subject, such that the first electrode is located anterior to an MCA of the subject and generally opposes opposing an anterior horn of a lateral cerebral ventricle, positioning a second electrode connected to the retainer at a second position on the head of the subject, such that the second electrode is located posterior to the MCA, above the ear of the subject, and generally opposes opposing a posterior horn of the lateral cerebral ventricle, and wherein the retainer is adapted to maintain relative positions of the first electrode and the second electrode with respect to one another;
driving a current between the first electrode and the second electrode from one of the first and second electrodes on a first side of the MCA through the lateral cerebral ventricle and to another of the first and second electrodes on a second side of the MCA, opposite the first side;
measuring a bioimpedance signal that results from driving the current; and
outputting information for predicting a hemodynamic condition associated with the MCA territory on a side of the head on which the first and second electrodes are positioned, based on the bioimpedance signal. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
- orienting a retainer on the head of the subject, the retainer comprising a substantially inflexible portion shaped to fit a temporal region of a head of a subject, the temporal region being adjacent to an ear of the subject, the portion shaped to maintain;
Specification