Apparatus and methods for determining damaged tissue using sub-epidermal moisture measurements
First Claim
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1. A method for assessing tissue health at and around a target location, comprising the steps of:
- obtaining a bioimpedance signal at the target location using a handheld apparatus comprising a bioimpedance sensor,obtaining a first plurality of bioimpedance signals at a respective plurality of locations along a first tissue assessment ring centered on and having a first radial distance from the target location using the handheld apparatus,obtaining a second plurality of bioimpedance signals at a respective plurality of locations along a second tissue assessment ring centered on and having a second radial distance from the target location, wherein the second radial distance is greater than the first radial distance,calculating a first average of the first plurality of bioimpedance signals,calculating a first difference between the first average and the bioimpedance signal obtained at the target location,calculating a second average of the second plurality of bioimpedance signals,calculating a second difference between the second average and the bioimpedance signal obtained at the target location, anddetermining whether the tissue is damaged;
wherein the step of determining whether the tissue is damaged comprises determining that the tissue is damaged if any of the first difference and second difference exceed the predetermined threshold.
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Abstract
The present disclosure provides apparatuses and computer readable media for measuring sub-epidermal moisture in patients to determine damaged tissue for clinical intervention. The present disclosure also provides methods for determining damaged tissue.
77 Citations
20 Claims
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1. A method for assessing tissue health at and around a target location, comprising the steps of:
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obtaining a bioimpedance signal at the target location using a handheld apparatus comprising a bioimpedance sensor, obtaining a first plurality of bioimpedance signals at a respective plurality of locations along a first tissue assessment ring centered on and having a first radial distance from the target location using the handheld apparatus, obtaining a second plurality of bioimpedance signals at a respective plurality of locations along a second tissue assessment ring centered on and having a second radial distance from the target location, wherein the second radial distance is greater than the first radial distance, calculating a first average of the first plurality of bioimpedance signals, calculating a first difference between the first average and the bioimpedance signal obtained at the target location, calculating a second average of the second plurality of bioimpedance signals, calculating a second difference between the second average and the bioimpedance signal obtained at the target location, and determining whether the tissue is damaged; wherein the step of determining whether the tissue is damaged comprises determining that the tissue is damaged if any of the first difference and second difference exceed the predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for assessing tissue health at and around a target location, comprising the steps of:
- obtaining a plurality of bioimpedance signal at the target location using a handheld apparatus comprising a bioimpedance sensor, obtaining a first plurality of bioimpedance signals at a respective plurality of locations along a first tissue assessment ring centered on and having a first radial distance from the target location using the handheld apparatus, obtaining a second plurality of bioimpedance signals at a respective plurality of locations along a second tissue assessment ring centered on and having a second radial distance from the target location, wherein the second radial distance is greater than the first radial distance, calculating an average target value of the plurality of bioimpedance signals at the target location, calculating a first average of the first plurality of bioimpedance signals, calculating a first difference between the first average and the average target value, calculating a second average of the second plurality of bioimpedance signals, calculating a second difference between the second average and the average target value, and
determining whether the tissue is damaged;
wherein the step of determining whether the tissue is damaged comprises determining that the tissue is damaged if any of the first difference and second difference exceed the predetermined threshold. - View Dependent Claims (15, 16, 17, 18)
- obtaining a plurality of bioimpedance signal at the target location using a handheld apparatus comprising a bioimpedance sensor, obtaining a first plurality of bioimpedance signals at a respective plurality of locations along a first tissue assessment ring centered on and having a first radial distance from the target location using the handheld apparatus, obtaining a second plurality of bioimpedance signals at a respective plurality of locations along a second tissue assessment ring centered on and having a second radial distance from the target location, wherein the second radial distance is greater than the first radial distance, calculating an average target value of the plurality of bioimpedance signals at the target location, calculating a first average of the first plurality of bioimpedance signals, calculating a first difference between the first average and the average target value, calculating a second average of the second plurality of bioimpedance signals, calculating a second difference between the second average and the average target value, and
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19. A method for assessing tissue health at and around a target location, comprising the steps of:
- obtaining a bioimpedance signal at the target location using an apparatus configured to measure bioimpedance, obtaining a first plurality of bioimpedance signals at a respective plurality of locations along a first tissue assessment ring centered on and having a first radial distance from the target location using the apparatus, obtaining a second plurality of bioimpedance signals at a respective plurality of locations along a second tissue assessment ring centered on and having a second radial distance from the target location, wherein the second radial distance is greater than the first radial distance, calculating a first average of the first plurality of bioimpedance signals, calculating a first difference between the first average and the bioimpedance signal obtained at the target location, calculating a second average of the second plurality of bioimpedance signals, calculating a second difference between the second average and the bioimpedance signal obtained at the target location, and
determining whether the tissue is damaged;
wherein the step of determining whether the tissue is damaged comprises determining that the tissue is damaged if any of the first difference and second difference exceed the predetermined threshold.
- obtaining a bioimpedance signal at the target location using an apparatus configured to measure bioimpedance, obtaining a first plurality of bioimpedance signals at a respective plurality of locations along a first tissue assessment ring centered on and having a first radial distance from the target location using the apparatus, obtaining a second plurality of bioimpedance signals at a respective plurality of locations along a second tissue assessment ring centered on and having a second radial distance from the target location, wherein the second radial distance is greater than the first radial distance, calculating a first average of the first plurality of bioimpedance signals, calculating a first difference between the first average and the bioimpedance signal obtained at the target location, calculating a second average of the second plurality of bioimpedance signals, calculating a second difference between the second average and the bioimpedance signal obtained at the target location, and
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20. A method for assessing tissue health at and around a target location, comprising the steps of:
- obtaining a plurality of bioimpedance signal at the target location using an apparatus configured to measure bioimpedance, obtaining a first plurality of bioimpedance signals at a respective plurality of locations along a first tissue assessment ring centered on and having a first radial distance from the target location using the apparatus, obtaining a second plurality of bioimpedance signals at a respective plurality of locations along a second tissue assessment ring centered on and having a second radial distance from the target location, wherein the second radial distance is greater than the first radial distance, calculating an average target value of the plurality of bioimpedance signals at the target location, calculating a first average of the first plurality of bioimpedance signals, calculating a first difference between the first average and the average target value, calculating a second average of the second plurality of bioimpedance signals, calculating a second difference between the second average and the average target value, and
determining whether the tissue is damaged;
wherein the step of determining that the tissue is damaged comprises determining that the tissue is damaged if any of the first difference and second difference exceed the predetermined threshold.
- obtaining a plurality of bioimpedance signal at the target location using an apparatus configured to measure bioimpedance, obtaining a first plurality of bioimpedance signals at a respective plurality of locations along a first tissue assessment ring centered on and having a first radial distance from the target location using the apparatus, obtaining a second plurality of bioimpedance signals at a respective plurality of locations along a second tissue assessment ring centered on and having a second radial distance from the target location, wherein the second radial distance is greater than the first radial distance, calculating an average target value of the plurality of bioimpedance signals at the target location, calculating a first average of the first plurality of bioimpedance signals, calculating a first difference between the first average and the average target value, calculating a second average of the second plurality of bioimpedance signals, calculating a second difference between the second average and the average target value, and
Specification