WEARABLE DEVICE FOR MEASURING EDEMA INDEX AND METHOD OF MEASURING EDEMA INDEX USING SAME

• US 20180049666A1
• Filed: 11/30/2016
• Published: 02/22/2018
• Est. Priority Date: 08/22/2016
• Status: Active Grant

• Current Assignee: Industry-Academic Cooperation Foundation, Chosun University (Chosun University)
• Original Assignee: Industry-Academic Cooperation Foundation, Chosun University (Chosun University)
• Inventors: KIM, Youn Tae, JUNG, Jae Hyo, SHIN, Si Ho
• Granted Patent: US 10,244,961 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 2562/0214 Capacitive electrodes
• CPC Class Codes: A61B 5/0531 Measuring skin impedance
• CPC Class Codes: A61B 5/0533 Measuring galvanic skin response
• CPC Class Codes: A61B 5/4878 Evaluating oedema
• CPC Class Codes: A61B 5/681 Wristwatch-type devices
• CPC Class Codes: A61B 5/7225 Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation A61B5/30, A61B5/316 take precedence; transformers for specific applications H01F38/00; amplifiers H03F
• CPC Class Codes: A61B 5/7275 Determining trends in physiological measurement data; Predicting development of a medical condition based on physiological measurements, e.g. determining a risk factor
• CPC Class Codes: G16H 50/30 for calculating health indices; for individual health risk assessment

Abstract

A wearable device for measuring an edema index includes: a band, wearable on a wrist; an electrode module including a pair of current electrodes and a pair of voltage electrodes; and a main module applying an alternating current (AC) to the pair of current electrodes, and obtaining an edema index of a human body from an AC voltage measured from the pair of voltage electrodes, wherein each of the pair of current electrodes and the pair of voltage electrodes is attached to one surface of the band in a row in a length direction of the band, and protrudes from the surface of the band to be in direct contact with the skin of the wrist when the band is worn on the wrist.

Claims

1. A wearable device for measuring an edema index comprising:

a band, wearable on a wrist;

an electrode module including a pair of current electrodes and a pair of voltage electrodes; and

a main module applying an alternating current (AC) to the pair of current electrodes, and obtaining an edema index of a human body from an AC voltage measured through the pair of voltage electrodes,

wherein each of the pair of current electrodes and the pair of voltage electrodes is attached to one surface of the band in a row in a length direction of the band, and protrudes from the surface of the band to be in direct contact with the skin of the wrist when the band is worn on the wrist.

2. The wearable device of claim 1, wherein the edema index is obtained at least in consideration of the weight, height, and gender of a user.

3. The wearable device of claim 1, wherein the main module obtains the edema index using the following formula:

4. The wearable device of claim 1, wherein the main module is attached to the other surface of the band, and comprises an AC source applying an AC to the pair of current electrodes, a voltage measuring module measuring the phase and level of an AC voltage measured through the pair of voltage electrodes, a computing module obtaining an edema index from the applied AC and the measured AC voltage, a display module displaying the edema index, and an input module receiving user information.

5. The wearable device of claim 1, wherein the pair of voltage electrodes are disposed between the pair of current electrodes.

6. The wearable device of claim 1, further comprising conductive wires connecting the pair of current electrodes to the main module, and connecting the pair of voltage electrodes to the main module,

wherein the conductive wires are disposed on the same plane or on different planes inside the band.

7. The wearable device of claim 1, wherein the frequency of the AC is between 10 Khz and 200 KHz, and the level of the AC is between 60 μ

A and 100 μ

A.

8. A method of measuring an edema index using a wearable device, the wearable device comprising a band, wearable on a wrist, and an electrode module having a pair of current electrodes and a pair of voltage electrodes respectively attached to one surface of the band in a row in a length direction of the band, and respectively protruding from the surface of the band to be in direct contact with the skin of the wrist when the band is worn on the wrist, the method comprising:

receiving user information including the weight, gender, and height of a user;

applying an alternating current (AC) to the pair of current electrodes;

measuring an AC voltage through the pair of voltage electrodes; and

obtaining an edema index, based on the user information, the applied AC, and the measured AC voltage,

wherein the edema index is obtained using the following formula;