NZ773459B2 - Bisymmetric comparison of sub-epidermal moisture values - Google Patents
Bisymmetric comparison of sub-epidermal moisture valuesInfo
- Publication number
- NZ773459B2 NZ773459B2 NZ773459A NZ77345918A NZ773459B2 NZ 773459 B2 NZ773459 B2 NZ 773459B2 NZ 773459 A NZ773459 A NZ 773459A NZ 77345918 A NZ77345918 A NZ 77345918A NZ 773459 B2 NZ773459 B2 NZ 773459B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- electrodes
- subset
- electrode
- sem
- skin
- Prior art date
Links
- 239000000758 substrate Substances 0.000 claims abstract 12
- 238000000034 method Methods 0.000 claims abstract 5
- 230000035899 viability Effects 0.000 claims abstract 2
- 238000005259 measurement Methods 0.000 claims 9
- 238000000926 separation method Methods 0.000 claims 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/04—Constructional details of apparatus
- A61B2560/0462—Apparatus with built-in sensors
- A61B2560/0468—Built-in electrodes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/04—Arrangements of multiple sensors of the same type
- A61B2562/046—Arrangements of multiple sensors of the same type in a matrix array
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
- A61B5/0531—Measuring skin impedance
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
- A61B5/0537—Measuring body composition by impedance, e.g. tissue hydration or fat content
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/44—Detecting, measuring or recording for evaluating the integumentary system, e.g. skin, hair or nails
- A61B5/441—Skin evaluation, e.g. for skin disorder diagnosis
- A61B5/445—Evaluating skin irritation or skin trauma, e.g. rash, eczema, wound, bed sore
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6813—Specially adapted to be attached to a specific body part
- A61B5/6823—Trunk, e.g., chest, back, abdomen, hip
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6813—Specially adapted to be attached to a specific body part
- A61B5/6829—Foot or ankle
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6843—Monitoring or controlling sensor contact pressure
Abstract
The present disclosure provides apparatuses and methods for assessing tissue viability, the apparatuses comprising a substrate configured to be placed against a surface of a patient’s skin, an electrode array comprising a plurality of electrodes, a circuit electronically coupled to each electrode of said plurality of electrodes, a processor, and a non-transitory computer-readable medium electronically coupled to said processor.
Claims (25)
1. An apparatus for identifying damaged tissue, said apparatus comprising: a substrate configured to be placed against a surface of a patient’s skin; an electrode array comprising a plurality of electrodes, each electrode of said plurality of electrodes being disposed on said substrate at a respective plurality of positions, wherein any two adjacent electrodes of said plurality of electrodes are separated from each other by a a circuit electronically coupled to each electrode of said plurality of electrodes, said circuit capable of measuring an electrical property from each electrode of said plurality of electrodes to generate a plurality of electrical measurements, and providing information regarding said plurality of electrical measurements; a processor electronically coupled to said circuit and configured to receive said information regarding said plurality of electrical measurements from said circuit and convert said information into a plurality of sub-epidermal moisture (SEM) values; and a non-transitory computer-readable medium electronically coupled to said processor and comprising instructions stored thereon that, when executed on said processor, perform the steps of: identifying a first SEM value corresponding to a first subset of said plurality of electrodes and a second SEM value corresponding to a second subset of said plurality of electrodes, wherein said first and second subsets of said plurality of electrodes are located at first and second positions that are bisymmetric with respect to said patient’s skin, and comparing said first SEM value that is associated with said first subset of said plurality of electrodes with said second SEM value that is associated with said second subset of said plurality of electrodes.
2. The apparatus according to claim 1, wherein said instructions further comprise the steps of: determining a difference between said first and second SEM values, and providing an indication that tissue is damaged at one of said first and second locations if said difference is greater than a predetermined threshold.
3. The apparatus according to claim 1, wherein said instructions further comprise the steps of: determining a difference between said first and second SEM values, determining which of said first and second average SEM values is larger than the other, and providing an indication that tissue is damaged at the location associated with the larger average SEM value if said difference is greater than a predetermined threshold.
4. The apparatus according to claim 1, wherein said electrical property comprises one or more of an electrical component selected from the group consisting of a resistance, a capacitance, an inductance, an impedance, and a reluctance.
5. The apparatus according to claim 1, wherein said apparatus further comprises an apparatus body, and wherein each of said first and second subsets of said plurality of electrodes are disposed on opposite ends of said apparatus body while being aligned on a common plane.
6. The apparatus according to claim 1, wherein said apparatus further comprises an apparatus body, and wherein said apparatus body is rigid and maintains said first and second subsets of said plurality of electrodes at a fixed separation distance and fixed orientation to each other.
7. The apparatus according to claim 1, wherein said apparatus further comprises an apparatus body, and wherein said apparatus body is flexible and allows said first and second subsets of electrodes to be oriented at an angle to each other.
8. The apparatus according to claim 7, wherein said apparatus body comprises a hinge.
9. The apparatus according to claim 1, wherein electrodes of said first subset of said plurality of electrodes are selectively activated to form a first virtual ring electrode and a first virtual central electrode.
10. The apparatus according to claim 1, wherein each of said electrical properties is measured simultaneously.
11. The apparatus according to claim 1, wherein electrodes of said second subset of said plurality of electrodes are selectively activated to form a second virtual ring electrode and a second virtual central electrode.
12. The apparatus according to claim 1, wherein electrodes of said first subset of said plurality of electrodes are selectively activated to form a first virtual ring electrode and a first virtual central electrode, and electrodes of said second subset of said plurality of electrodes are selectively activated to form a second virtual ring electrode and a second virtual central electrode.
13. The apparatus according to claim 1, wherein each electrode of said plurality of electrodes has a shape selected from the group comprising a hexagonal shape, a pentagonal shape, a square shape, a triangular shape, and a circular shape.
14. The apparatus according to claim 1, wherein each electrode of said plurality of electrodes has the same shape.
15. The apparatus according to claim 13 or 14, wherein said gap separating said any two adjacent electrodes chosen from said plurality of electrodes is uniform.
16. The apparatus according to claim 15, said gap separating said any two adjacent electrodes has a width that is narrower than the cross-section of each of said electrodes.
17. The apparatus according to claim 1, wherein said gap separating said any two adjacent electrodes chosen from said plurality of electrodes is variable.
18. The apparatus according to claim 1, wherein said first subset of electrodes and said second subset of electrodes comprise one or more shared electrodes.
19. The apparatus according to claim 18, wherein electrodes of said first subset of electrodes of said plurality of electrodes are selectively activated to form a first virtual ring electrode and a first virtual central electrode, electrodes of said second subset of electrodes of said plurality of electrodes are selectively activated to form a second virtual ring electrode and a second virtual central electrode.
20. The apparatus according to claim 19, wherein the locations of said first and second virtual ring electrodes partially overlap.
21. The apparatus according to claim 20, wherein the locations of said first and second virtual central electrodes partially overlap.
22. The apparatus according to claim 1, wherein said plurality of positions are disposed on the surface of said substrate in a regular pattern.
23. The apparatus according to claim 1, wherein said electrode array is larger than the portion of a patient’s skin that is being positioned against said electrode array.
24. A method for assessing tissue viability, the method comprising: providing a substrate configured to be placed against a surface of a patient’s skin, wherein said substrate comprises an electrode array comprising a plurality of electrodes, wherein said plurality of electrodes is disposed on said substrate at a respective plurality of positions, and wherein any two adjacent electrodes of said plurality of electrodes are separated from each other by a gap, placing said substrate against said surface of said patient’s skin, measuring an electrical property corresponding to each electrode of said plurality of electrodes, thereby generating a plurality of electrical measurements, transferring information about the plurality of electrical measurements to a sub- epidermal moisture (SEM) application running on a processor, converting in the processor said plurality of electrical measurements into a plurality of SEM values, identifying an SEM value from said plurality of SEM values corresponding to a first subset of said plurality of electrodes at a first location on said patient’s skin, identifying an average SEM value corresponding to a second subset of said plurality of electrodes at locations surrounding said first location on said patient’s skin, and determining a difference between said SEM value and said average SEM value.
25. A method for measuring sub-epidermal moisture (SEM) values, the method comprising: providing a substrate configured to be placed against a surface of a patient’s skin, wherein said substrate comprises an electrode array comprising a plurality of electrodes, wherein said plurality of electrodes is disposed on said substrate at a respective plurality of positions, and wherein any two adjacent electrodes of said plurality of electrodes are separated from each other by a gap, placing said substrate against said surface of said patient’s skin, emitting a plurality of radiofrequency (RF) signals through pairs of electrodes of said plurality of electrodes, collecting a capacitance measurement corresponding to said pairs of electrodes of said plurality of electrodes, thereby generating a plurality of capacitance measurements, converting said plurality of capacitance measurements into a plurality of SEM values, identifying an SEM value from said plurality of SEM values corresponding to a first subset of said plurality of electrodes at a first location on said patient’s skin, identifying an average SEM value corresponding to a second subset of said plurality of electrodes at locations surrounding said first location on said patient’s skin, and determining a difference between said SEM value and said average SEM value. Bruin Biometrics, LLC By the Attorneys for the Applicant SPRUSON & FERGUSON
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NZ795115A NZ795115B2 (en) | 2018-02-02 | Bisymmetric comparison of sub-epidermal moisture values |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201762454455P | 2017-02-03 | 2017-02-03 | |
| US201762521871P | 2017-06-19 | 2017-06-19 | |
| NZ752935A NZ752935B2 (en) | 2017-02-03 | 2018-02-02 | Bisymmetric comparison of sub-epidermal moisture values |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NZ773459A NZ773459A (en) | 2024-01-26 |
| NZ773459B2 true NZ773459B2 (en) | 2024-04-30 |
Family
ID=
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FI3571987T3 (en) | Apparatus for determining damaged tissue using sub-epidermal moisture measurements | |
| WO2015095024A3 (en) | System for measuring an electrical characteristic of tissue to identify a neural target for a therapy | |
| FI125006B (en) | Method and apparatus for measuring muscle signals | |
| US9763583B2 (en) | Electrodes for abdominal fetal electrocardiogram detection | |
| JP2006508732A5 (en) | ||
| JP2012527052A5 (en) | ||
| WO2007067632A3 (en) | Method and system for detecting electrophysiological changes in pre-cancerous and cancerous tissue and epithelium | |
| RU2015110997A (en) | CATHETER TEMPERATURE MEASUREMENT | |
| ATE512693T1 (en) | HEART STIMULATOR WITH AN IMPEDANCE MEASUREMENT CIRCUIT FOR DETECTING ISCHEMIA | |
| RU2017140233A (en) | Contact quality assessment through dielectric analysis | |
| CA2557245A1 (en) | Position sensing and detection of skin impedance | |
| EP4236024A3 (en) | A method and system for dynamic fault detection in an electric grid | |
| JP2016527943A (en) | A small and wearable household device that determines the wetness of the tissue | |
| JP2015512658A (en) | Device, system and method for determining relative spatial variation of subsurface resistivity to frequency in tissue | |
| WO2016198963A2 (en) | Electrodes for abdominal fetal electrocardiogram detection | |
| EP2785155A3 (en) | Circuit board and electronic device | |
| EP2783759A3 (en) | Ultrasonic transducer device, probe, electronic instrument, and ultrasonic diagnostic device | |
| CN105388190B (en) | Composite wing damage positioning method based on coupling machine electrical impedance | |
| NZ773459B2 (en) | Bisymmetric comparison of sub-epidermal moisture values | |
| EP3289967A3 (en) | Health band terminal | |
| NZ773459A (en) | Bisymmetric comparison of sub-epidermal moisture values | |
| CN103654777B (en) | Measure the device of organism electrical impedance | |
| KR101633002B1 (en) | Pain signal measurement device and pain signal measuring and controlling method thereof | |
| DE602005011499D1 (en) | MEDICAL DEVICE FOR DETERMINING THE POSSESSION OF A PATIENT | |
| KR102240611B1 (en) | Apparatus and method of imaging pressure distribution by using multi-layered pressure sensor |