Devices for determining the relative spatial change in subsurface resistivities across frequencies in tissue
First Claim
1. A non-invasive lung wetness sensor, the sensor comprising:
- a support backing extending along a proximal to distal axis;
a plurality of elongate electrodes each the same size and having a length of between about 1.5 and about 2.5 inches and a width of between about 0.1 and about 0.5 inches, wherein the electrodes are arranged with their lengths perpendicular to the proximal to distal axis on a subject-contacting surface of the support backing so that the electrodes extend in a line parallel to the proximal to distal axis of the support backing to form an active region that extends between about 6 and about 14 inches along the proximal to distal axis; and
wherein the plurality of electrodes in the active region are configured to form a plurality of pairs of current-injecting electrodes and a plurality of pairs of voltage detection electrodes.
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Accused Products
Abstract
Sensors for non-invasively determining tissue wetness/hydration based on relative changes in subsurface resistivities in tissue below the sensor when applied to a human body across different frequencies. A sensor including arrays of current-injecting and voltage-sensing electrodes may be placed on a subject'"'"'s back to determine lung wetness. Sensors may be used as part of a systems and method for determining tissue water content, systems and methods for determining lung wetness, or the like. Sensors for determining relative changes in subsurface resistivities across frequencies and systems include arrays of electrodes used to determine relative changes in subsurface resistivities across frequencies may include pairs of current-injecting and voltage sensing electrodes.
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Citations
30 Claims
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1. A non-invasive lung wetness sensor, the sensor comprising:
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a support backing extending along a proximal to distal axis; a plurality of elongate electrodes each the same size and having a length of between about 1.5 and about 2.5 inches and a width of between about 0.1 and about 0.5 inches, wherein the electrodes are arranged with their lengths perpendicular to the proximal to distal axis on a subject-contacting surface of the support backing so that the electrodes extend in a line parallel to the proximal to distal axis of the support backing to form an active region that extends between about 6 and about 14 inches along the proximal to distal axis; and wherein the plurality of electrodes in the active region are configured to form a plurality of pairs of current-injecting electrodes and a plurality of pairs of voltage detection electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A non-invasive lung wetness sensor, the sensor comprising:
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a support backing extending in a proximal to distal axis, wherein the support backing is flexible and inelastic; a plurality of six or more elongate electrodes, each the same size and having a length of between about 1.5 and about 2.5 inches and a width of between about 0.1 and about 0.5 inches, wherein the electrodes are arranged with their lengths perpendicular to the proximal to distal axis on a subject-contacting surface of the support backing so that the electrodes extend in a line parallel to the proximal to distal axis of the support backing to form an active region that extends between about 6 and about 14 inches along the proximal to distal axis; and an adhesive, conductive hydrogel on the subject-contacting surface that is configured to secure the sensor to a subject'"'"'s back. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A non-invasive lung wetness sensor, the sensor comprising:
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a flexible and inelastic support backing of less than about 5 mils thickness extending in a proximal to distal axis; a plurality of six or more elongate electrodes, each the same size and having a length of between about 1.5 and about 2.5 inches and a width of between about 0.1 and about 0.5 inches, wherein the electrodes are arranged with their lengths perpendicular to the proximal to distal axis on a subject-contacting surface of the support backing so that the electrodes extend in a line parallel to the proximal to distal axis of the support backing to form an active region that extends between about 6 and about 14 inches along the proximal to distal axis; an adhesive, conductive hydrogel extending completely over the active region on the subject-contacting surface that is configured to secure the sensor to a subject'"'"'s back; an anti-bacterial titanium oxide coating over at least a portion of the support backing; and a plurality of leads, wherein each electrode is connected with a lead from the plurality of leads, wherein each lead extends from a first side of the support backing.
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Specification