Electronic device for determining dry weight range and operating method thereof

Abstract

Disclosed are an electronic device for determining a dry weight range and an operating method thereof. The disclosed operating method of the electronic device comprises the steps of: acquiring extracellular water and free fat mass of the body of a subject; correcting the extracellular water on the basis of the extracellular water included in the fat of the body; and comparing the current ratio between the corrected extracellular water and the free fat mass with a range of a reference ratio for normovolemia, and determining a dry weight range for the subject such that the current ratio is included in the range of the reference ratio.

Description

Electronic device for determining dry weight range and method of operation thereof

[0001] The disclosure below relates to an electronic device for determining a dry weight range and a method of operating the same.

[0002] When diseases of organs related to fluid regulation, such as heart disease, kidney disease, or liver disease, occur, fluid accumulation can lead to congestion or edema in the body. If congestion or edema is not properly treated, the risk of complications or death can increase. Dry weight can indicate the body's weight after excess fluid, such as congestion or edema, has been removed. Research is underway to develop a technique for quantitatively determining dry weight in patients undergoing dialysis treatment, without relying on the physician's experience or clinical judgment.

[0003] The background technology described above is possessed or acquired during the process of deriving the present disclosure, and cannot necessarily be said to be a publicly known technology disclosed to the general public prior to the filing of the present disclosure.

[0004] Various embodiments can determine the dry weight range of normal fluid status (normovolumemia) for a subject from the extracellular water (ECW) and free fat mass (FFM) of the subject's body.

[0005] Various embodiments can provide body composition values ​​in a normal fluid state to an edematous or congested patient using the subject's body water, lean body mass, and body fat mass, and determine the amount of water that needs to be removed to correspond to a normal fluid state.

[0006] Other objects and advantages of the present invention can be understood through the following description and will be more clearly understood through the embodiments of the present invention. Furthermore, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims.

[0007] An operating method of an electronic device according to one embodiment includes an operation of obtaining extracellular water and lean body mass of a body of a subject, an operation of correcting the extracellular water based on extracellular water included in fat of the body, and an operation of comparing a current ratio between the corrected extracellular water and lean body mass with a reference ratio range for a normal body fluid state, thereby determining a dry body weight range for the subject such that the current ratio falls within the reference ratio range.

[0008] The operation of determining the above dry body weight range may include determining a target lean body mass that must change in order for the current ratio to be included in the reference ratio range when the corrected extracellular water and lean body mass are changed according to a predetermined ratio between the extracellular water and lean body mass, and determining the dry body weight range based on the target lean body mass and the fat mass of the subject.

[0009] The operation of determining the above dry weight range may include determining a target extracellular water that must change for the current ratio to be included in the reference ratio range, and determining the target lean body mass based on the target extracellular water and the ratio between the predetermined extracellular water and lean body mass.

[0010] The operation of determining the above dry weight range can determine a weight adjustment amount for the subject's weight to be included in the above dry weight range based on the above dry weight range.

[0011] The operation of comparing the current ratio with the reference ratio range may determine the reference ratio range based on the average ratio between extracellular water and lean body mass of a general population for the gender and / or age of the subject and a predetermined standard deviation range.

[0012] The above operation of correcting extracellular water can determine extracellular water contained in the fat of the body based on the extracellular water of the body and the percentage body fat (PBF) of the body.

[0013] The method of operating the electronic device may further include providing the current ratio, the reference ratio range, and the dry weight range to the test subject.

[0014] An electronic device according to one embodiment includes a processor and a memory storing instructions, wherein the instructions, when executed by the processor, cause the electronic device to obtain extracellular water and lean body mass of a body of a subject, correct the extracellular water based on extracellular water included in fat of the body, and compare a current ratio between the corrected extracellular water and lean body mass with a reference ratio range for a normal body fluid state, thereby determining a dry body weight range for the subject such that the current ratio falls within the reference ratio range.

[0015] The instructions, when executed by the processor, may cause the electronic device to determine a target lean body mass to which the current ratio must change to fall within the reference ratio range when the corrected extracellular water and lean body mass are varied according to a predetermined ratio between the extracellular water and lean body mass, and to determine the dry body weight range based on the target lean body mass and the fat mass of the subject.

[0016] The instructions, when executed by the processor, may cause the electronic device to determine a target extracellular water content that must change so that the current ratio falls within the reference ratio range, and to determine the target lean body mass based on the target extracellular water content and the predetermined ratio between the extracellular water content and lean body mass.

[0017] The above instructions, when executed by the processor, may cause the electronic device to determine a weight adjustment amount for the subject's weight to fall within the dry weight range, based on the dry weight range.

[0018] The above instructions, when executed by the processor, may cause the electronic device to determine the reference ratio range based on the average ratio between extracellular water and lean body mass and a predetermined standard deviation range of the ratio for a normal person for the gender and / or age of the subject.

[0019] The above instructions, when executed by the processor, may cause the electronic device to determine extracellular water contained in fat of the body based on the extracellular water of the body and the body fat percentage of the body.

[0020] The above instructions, when executed by the processor, may cause the electronic device to provide the current ratio, the reference ratio range, and the dry weight range to the subject.

[0021] Various embodiments can assist patients or healthcare providers in determining appropriate dialysis doses or weight loss amounts by determining a dry weight range based on the subject's current body composition status.

[0022] Various embodiments can provide body composition to a patient group requiring body fluid and weight control due to congestion or edema to achieve a normal body fluid state.

[0023] Figure 1 is a flowchart illustrating an operating method of an electronic device according to one embodiment.

[0024] FIGS. 2 and 3 are diagrams illustrating a process for determining a dry weight range for a subject according to one embodiment.

[0025] FIG. 4 is a drawing illustrating an example of providing a dry weight range according to one embodiment.

[0026] FIG. 5 is a block diagram illustrating an electronic device according to one embodiment.

[0027] Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only and may be modified and implemented in various forms. Therefore, the actual implementation is not limited to the specific embodiments disclosed, and the scope of this specification includes modifications, equivalents, or alternatives within the technical concepts described in the embodiments.

[0028] In this document, phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, or C", and "a combination of one or more of A, B, and C" can each include any one of the items listed together in that phrase, or all possible combinations thereof. Although terms such as first or second may be used to describe various components, such terms should be construed only for the purpose of distinguishing one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

[0029] When it is said that a component is "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but there may also be other components in between.

[0030] Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "has" should be understood to indicate the presence of a described feature, number, step, operation, component, part, or combination thereof, but not to exclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0031] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art. Terms defined in commonly used dictionaries should be interpreted to have a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0032] Hereinafter, embodiments will be described in detail with reference to the attached drawings. In the description with reference to the attached drawings, identical components are assigned the same reference numerals regardless of the drawing numbers, and redundant descriptions thereof will be omitted.

[0033]

[0034] Figure 1 is a flowchart illustrating an operating method of an electronic device according to one embodiment.

[0035] Referring to FIG. 1, the electronic device can determine a dry weight range for the subject based on the extracellular water and lean body mass of the subject's body.

[0036] The electronic device is a device that determines the dry weight range of a subject, and can be mounted on a body composition measurement device or transmit and receive data by communicating with the body composition measurement device via wired or wireless communication. For example, the electronic device can obtain the extracellular water and lean body mass of the subject's body from the body composition measurement device. In some embodiments, the electronic device may be a body composition measurement device. The body composition measurement device is attached to the body of the subject and can measure the subject's body composition. For example, the body composition measurement device can measure at least one of the subject's body water, extracellular water, intracellular water, body fat mass, lean body mass, body weight, and muscle mass.

[0037] Electronic devices may include, but are not limited to, various computing devices such as mobile phones, smart phones, tablets, e-book devices, laptops, personal computers, desktops, workstations, or servers; various wearable devices such as smart watches, smart glasses, head-mounted displays (HMDs), or smart clothing; various home appliances such as smart speakers, smart TVs, or smart refrigerators; smart cars, smart kiosks, Internet of Things (IoT) devices, walking assist devices (WADs), drones, or robots.

[0038] When the body is in a normal fluid state (normovolemia), the ratio of extracellular water to body weight can remain constant. Edema or congestion, due to various causes, can lead to an increase in body fluid, leading to hypervolemia. In hypervolemia, weight gain can be approximately 1 kg for every liter of fluid gained. Since extracellular water is contained within body weight, if extracellular water is removed from the body during hypervolemia, body weight can decrease by the amount of extracellular water removed. Dry weight can be determined, for example, as the weight of a subject when extracellular water is reduced to normal fluid state. However, if the subject is obese, dry weight determined using this method may be inaccurate due to the following reasons.

[0039] The first reason is that extracellular water per body weight can be affected by body fat. If the subject is obese, the body may have relatively more body fat and less muscle mass, which contains a lot of water, resulting in a lower ratio of body water to body weight. Consequently, when determining dry weight, the result may be that the subject needs to increase body water even though he or she has edema or congestion and thus has a high body water content. In one embodiment, the electronic device uses the body water per lean body mass of the subject, rather than body weight, to determine the subject's normal body fluid status, thereby determining the dry weight range for the subject regardless of body fat.

[0040] The second reason is that the water contained in the body's adipose tissue is not considered to be included in excess fluid because it is increased due to obesity. In one embodiment, the electronic device can determine the dry weight range for the subject by determining the difference between the body fluid state after excluding the water contained in the adipose tissue and the normal body fluid state after excluding the water contained in the adipose tissue.

[0041] According to one embodiment, the electronic device may determine a dry body weight range for the subject by correcting the extracellular water obtained from the body composition measurement device based on the extracellular water contained in the fat of the subject's body, and comparing the current ratio between the corrected extracellular water and lean body mass with a reference ratio range for a normal body fluid state. For example, the electronic device may determine a lean body mass or weight adjustment amount that makes the current ratio between the corrected extracellular water and lean body mass fall within the reference ratio range when the corrected extracellular water and lean body mass are changed according to a predetermined ratio between the extracellular water and lean body mass (e.g., 1:1). Through this, the electronic device may quantitatively provide the amount of body composition (e.g., body water, lean body mass, body weight) required to change to a normal body fluid state for a patient with edema or congestion. Furthermore, the electronic device may assist in determining an appropriate amount of fluid loss during dialysis treatment for a patient, and may assist in determining the dosage of a diuretic to be administered to a patient with acute heart failure by determining the dry body weight.

[0042] In the following embodiments, the operations may be performed sequentially, but are not necessarily performed sequentially. For example, the order of the operations may be changed, and at least two operations may be performed in parallel. Operations (110) to (130) may be performed by at least one component (e.g., a processor, etc.) of the electronic device.

[0043] In operation (110), the electronic device can obtain the extracellular water and lean body mass of the subject's body.

[0044] In operation (120), the electronic device can compensate for extracellular water contained in body fat based on the extracellular water contained in the body fat. The electronic device can determine the extracellular water contained in body fat based on the body's extracellular water and the body fat percentage.

[0045] In operation (130), the electronic device can compare the current ratio between the corrected extracellular water and lean body mass with the reference ratio range for a normal body fluid state to determine a dry body weight range for the subject so that the current ratio falls within the reference ratio range. The electronic device can determine a target lean body mass that must change for the current ratio to fall within the reference ratio range when the corrected extracellular water and lean body mass are changed according to a predetermined ratio between the extracellular water and lean body mass, and can determine the dry body weight range based on the target lean body mass and the fat mass of the subject. The electronic device can determine the target extracellular water that must change for the current ratio to fall within the reference ratio range, and can determine the target lean body mass based on the target extracellular water and the predetermined ratio between the extracellular water and lean body mass. The electronic device can determine a weight adjustment amount for the weight of the subject to fall within the dry body weight range. The electronic device can determine a reference ratio range based on the average ratio of extracellular water to lean body mass and a predetermined standard deviation range for the average age and sex of the subject. The electronic device can then provide the subject with the current ratio, reference ratio range, and dry body mass range.

[0046] The matters described below through FIGS. 2 to 4 can be applied as is to each of the operations illustrated in FIG. 1.

[0047]

[0048] FIGS. 2 and 3 are diagrams illustrating a process for determining a dry weight range for a subject according to one embodiment.

[0049] Referring to FIG. 2, a graph (200) showing extracellular water relative to lean body mass of the body is illustrated as an example.

[0050] The electronic device can obtain the current extracellular water and lean body mass of the subject using a body composition measurement device. In the graph (200), the electronic device can determine a point (210) representing the current extracellular water and lean body mass of the subject.

[0051] An electronic device can determine the amount of extracellular water contained in the fat of a subject's body. For example, the electronic device can determine the amount of extracellular water contained in fat based on the subject's body fat percentage. In one embodiment, the electronic device can correct the extracellular water measured by a body composition measurement device based on the amount of extracellular water contained in the body fat. For example, the electronic device can correct the extracellular water by reducing the amount of extracellular water contained in fat from the amount of extracellular water measured by the body composition measurement device. The corrected extracellular water can represent the actual amount of extracellular water of the body after removing the overestimated extracellular water due to body fat. In the graph (200), the electronic device can determine a point (220) representing the corrected extracellular water and lean body mass of the subject's body.

[0052] An electronic device can determine the mean and standard deviation of the ratio of extracellular water to lean body mass (ECW / FFM) of a normal person. For example, the electronic device can determine the mean and standard deviation of the ECW / FFM of a normal person for the gender and / or age of the subject. In one embodiment, the electronic device can determine a reference ratio range based on the determined mean of the ECW / FFM of a normal person and a predetermined standard deviation range (e.g., from -1 standard deviation to +1 standard deviation). The reference ratio range can represent a range of ECW / FFM that can be determined to correspond to a normal body fluid state for the subject. In the graph (200), the electronic device can determine an interval (230) based on the mean of the ECW / FFM of a normal person, and determine an area (240) based on the standard deviation of the ECW / FFM of a normal person and the predetermined standard deviation range. In the example of FIG. 2, the electronic device can determine the reference ratio range based on a value obtained by adding one standard deviation to the average of the ECW / FFM of a normal person and a value obtained by subtracting one standard deviation from the average of the ECW / FFM. However, the predetermined standard deviation range may be determined differently depending on the embodiment.

[0053] The electronic device can compare the current ratio between the corrected extracellular water and the lean body mass of the subject with a reference ratio range for a normal body fluid state, and determine an amount of body water that must be reduced from the subject's body to bring the subject's body into the reference ratio range. The electronic device can determine a target lean body mass that must be changed for the current ratio to fall within the reference ratio range when the corrected extracellular water and lean body mass are changed (increased or decreased) according to a predetermined ratio between extracellular water and lean body mass (e.g., 1:1). In addition, the electronic device can determine the target extracellular water that must be changed for the current ratio to fall within the reference ratio range, and determine the target lean body mass based on the target extracellular water and the predetermined ratio between extracellular water and lean body mass. For example, when the predetermined ratio between extracellular water and lean body mass is 1:1, the target lean body mass and the target extracellular water can have the same value. The target lean body mass and target extracellular water may represent the amount of lean body mass and extracellular water that the subject needs to change to correspond to a normal body fluid state, respectively. In the graph (200), the electronic device may determine the amount of extracellular water and lean body mass that needs to be changed at a point (220) so that the subject's body corresponds to a region (240) where the reference ratio range is indicated. The electronic device may determine the normal range of actual lean body mass in a normal body fluid state based on the extracellular water or lean body mass that needs to be changed. For example, if the ratio between the predetermined extracellular water and lean body mass is 1:1, the electronic device may change the extracellular water and lean body mass at the same ratio from the point (220) to determine the section (250) that represents the normal range of actual lean body mass in a normal body fluid state.

[0054] The electronic device can determine the dry weight range for the subject based on the determined normal range of lean body mass. For example, the electronic device can determine the dry body weight range for the subject by adding the subject's fat mass to the normal range of lean body mass. Alternatively, the electronic device can determine the normal lean body mass as the midpoint of the normal range of lean body mass and add the subject's fat mass to the normal lean body mass to determine the dry body mass. In the graph (200), point (260) can represent the normal lean body mass.

[0055] The electronic device can provide the subject with the current ratio of extracellular water to lean body mass, the reference ratio range, and the dry body weight range. Furthermore, the electronic device can provide the subject with a normal lean body mass range for the subject to correspond to a normal fluid state. The electronic device can determine and provide a weight range and a recommended weight value for the subject to correspond to a normal fluid state. The electronic device can determine and provide a weight adjustment amount that the subject needs to change (decrease or increase) from the current body weight to reach the weight range corresponding to a normal fluid state. For example, the electronic device can determine the weight adjustment amount by subtracting the recommended weight value from the subject's current body weight.

[0056] The electronic device can provide a visualization of the current ratio between extracellular water and lean body mass, the reference ratio range, and the dry body range of the examinee in a graph (200). The electronic device can visualize the ECW / FFM of the general population by gender and age as an interval (230), and determine an area (240) by moving parallel to a value corresponding to a predetermined standard deviation range based on the average of the ECW / FFM. When displaying information on the extracellular water and lean body mass of the examinee in the graph (200), the electronic device can display the actual amount of extracellular water by removing the extracellular water overestimated due to body fat, and can determine the points where the straight line with a predetermined slope (e.g., 1) is generated from the corresponding value and intersect the area (240). Through the graph (200), the electronic device can provide information so that the examinee or medical staff can easily understand various body composition information about the examinee.

[0057] In one embodiment, the electronic device can adjust the scale of the x-axis and y-axis of the graph (200) to output the same average and standard deviation values ​​of ECW / FFM that are different by gender and / or age. By making it possible for the electronic device to uniformly display the size, position, or slope of the section (230) and area (240) that are determined differently by gender or age on the graph (200), the electronic device can prevent confusion in the information about the subject provided to the subject or medical staff.

[0058] Referring to FIG. 3, a graph (310) representing extracellular water for body weight, a graph (320) representing extracellular water for lean body mass, and a graph (330) representing corrected extracellular water for lean body mass are illustrated as examples.

[0059] As in graph (310), when using the ratio between extracellular water and body weight (ECW / Weight) to determine the dry weight range for a subject, the dry weight range may be overestimated for a patient group with a high body fat mass per body weight (e.g., obese patients).

[0060] As in graph (320), when determining the dry weight range for a subject, when using the ratio between the measured extracellular water including extracellular water contained in fat and the lean body mass, the amount of extracellular water in the fat tissue that cannot be removed by dialysis may not be taken into consideration.

[0061] In one embodiment, when determining the dry body weight range for a subject using the ratio between the extracellular water corrected by removing extracellular water contained in fat and the lean body mass, as shown in graph (330), the electronic device can determine the range of extracellular water and dry body weight that must be removed to a normal water range by taking into account the increased extracellular water due to increased fat. By quantitatively determining the dry body weight range for a subject, the electronic device can assist the patient or medical professional in determining the appropriate amount of dialysis or weight loss.

[0062]

[0063] FIG. 4 is a drawing illustrating an example of providing a dry weight range according to one embodiment.

[0064] Referring to FIG. 4, a reference ratio range (410) determined based on the gender and age of the subject and body composition information (420) provided to the subject by the electronic device are exemplarily illustrated. The reference ratio range (410) and body composition information (420) illustrated in FIG. 4 are merely illustrative and the embodiment is not limited thereto, and may be determined differently depending on the subject.

[0065] Electronic devices can obtain information about the subject's gender and age. For example, when measuring body composition, the electronic device can receive information about the subject's gender and age. For example, the electronic device can obtain information such as the subject's gender being "female" and age being "76 years old."

[0066] The electronic device may determine a reference ratio range (410) based on the acquired gender and age of the test subject. For example, if the gender of the test subject is "female" and the age is "76 years old," the electronic device may determine an interval (411) based on the average of the ECW / FFM of a 76-year-old normal female, and may determine intervals (412) and (413) based on the standard deviation of the ECW / FFM of a 76-year-old normal female. The electronic device may determine the area from interval (412) to interval (413) as the reference ratio range (410) for a normal body fluid state. In one embodiment, the electronic device may obtain the average and standard deviation of the ECW / FFM from big data on normal individuals of each gender and age.

[0067] The electronic device can provide body composition information (420) based on the current extracellular water and lean body mass of the examinee and the reference ratio range (410). The electronic device can provide a point (421) indicating the current extracellular water and lean body mass of the examinee, the reference ratio range (422), and the normal range (423) of lean body mass by visualizing them in a graph. In addition, the electronic device can provide the normal range (424) of lean body mass, the normal body weight range (425), and the current body composition (426) of the examinee by expressing them numerically. In addition, the electronic device can provide the determined dry body weight range numerically or in a graph. The electronic device can provide one or more of the body composition information (420) in different methods and forms according to embodiments, and the embodiments are not limited to the body composition information (420) illustrated in FIG. 4.

[0068]

[0069] FIG. 5 is a block diagram illustrating an electronic device according to one embodiment.

[0070] Referring to FIG. 5, the electronic device (500) may include a processor (510). The processor (510) may include at least one processor. In addition, the electronic device (500) may further include a memory (520).

[0071] The memory (520) may store instructions (e.g., programs) executable by the processor (510). For example, the instructions may include instructions for executing operations of the processor (510) and / or operations of each component of the processor (510).

[0072] The processor (510) is a device that executes commands or programs or controls the electronic device (500), and may include various processors such as a CPU (Central Processing Unit) and a GPU (Graphics Processing Unit). The processor (510) can obtain the extracellular water and fat-free mass of the body of the subject. The processor (510) can correct the extracellular water based on the extracellular water contained in the fat of the body. The processor (510) can compare the current ratio between the corrected extracellular water and fat-free mass with the reference ratio range for a normal body fluid state, and determine the dry weight range for the subject so that the current ratio falls within the reference ratio range.

[0073] The processor (510) determines a target lean mass that must change for the current ratio to fall within a reference ratio range when the corrected extracellular water and lean mass are changed according to a predetermined ratio between the extracellular water and lean mass, and can determine a dry body weight range based on the target lean mass and the fat mass of the subject. The processor (510) determines a target extracellular water that must change for the current ratio to fall within a reference ratio range, and can determine a target lean mass based on the target extracellular water and the predetermined ratio between the extracellular water and lean mass. The processor (510) can determine a weight adjustment amount for the weight of the subject to fall within the dry body weight range based on the dry body weight range. The processor (510) can determine a reference ratio range based on an average ratio between the extracellular water and lean mass of a normal person for the gender and / or age of the subject and a predetermined standard deviation range. The processor (510) can determine the extracellular water contained in body fat based on the body's extracellular water and body fat percentage. The processor (510) can provide the subject with the current ratio, reference ratio range, and dry weight range.

[0074] In addition, the electronic device (500) can process the above-described operations.

[0075] The embodiments described above may be implemented using hardware components, software components, and / or a combination of hardware components and software components. For example, the devices, methods, and components described in the embodiments may be implemented using a general-purpose computer or a special-purpose computer, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA), a programmable logic unit (PLU), a microprocessor, or any other device capable of executing instructions and responding to them. The processing device may execute an operating system (OS) and software applications running on the operating system. Furthermore, the processing device may access, store, manipulate, process, and generate data in response to the execution of the software. For ease of understanding, the processing device is sometimes described as being used alone; however, one of ordinary skill in the art will recognize that the processing device may include multiple processing elements and / or multiple types of processing elements. For example, a processing unit may include multiple processors, or a processor and a controller. Other processing configurations, such as parallel processors, are also possible.

[0076] Software may include a computer program, code, instructions, or a combination of one or more of these, and may configure a processing device to perform a desired operation or, independently or collectively, command the processing device. The software and / or data may be stored on any type of machine, component, physical device, virtual equipment, computer storage medium, or device for interpretation by the processing device or for providing instructions or data to the processing device. The software may also be distributed over networked computer systems and stored or executed in a distributed manner. The software and data may be stored on a computer-readable recording medium.

[0077] The method according to the embodiment may be implemented in the form of program commands that can be executed through various computer means and recorded on a computer-readable medium. The computer-readable medium may store program commands, data files, data structures, etc., alone or in combination, and the program commands recorded on the medium may be those specially designed and configured for the embodiment or may be known and available to those skilled in the art of computer software. Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, and hardware devices specially configured to store and execute program commands, such as ROMs, RAMs, and flash memories. Examples of program commands include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter, etc.

[0078] The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

[0079] Although the embodiments described above have been described with limited drawings, those skilled in the art will appreciate that various technical modifications and variations can be applied based on the described embodiments. For example, appropriate results can still be achieved even if the described techniques are performed in a different order than described, and / or components of the described systems, structures, devices, circuits, etc. are combined or combined in a different manner than described, or are replaced or substituted with other components or equivalents.

[0080] Therefore, other implementations, other embodiments, and equivalents to the claims also fall within the scope of the claims described below.

Claims

1. In the method of operating an electronic device, An action to obtain the extracellular water (ECW) and free fat mass (FFM) of the subject's body; An action to correct the extracellular water based on the extracellular water contained in the fat of the body; and An operation of comparing the current ratio between the above-mentioned corrected extracellular water and the above-mentioned fat-free mass with the reference ratio range for a normal body fluid state, and determining a dry weight range for the subject so that the current ratio falls within the reference ratio range. Including How an electronic device operates.

2. In paragraph 1, The movement that determines the above dry weight range is When the above-mentioned corrected extracellular water and the above-mentioned lean body mass are changed according to a predetermined ratio between the extracellular water and lean body mass, the target lean body mass that must be changed for the current ratio to be included in the above-mentioned reference ratio range is determined, Based on the target lean body mass and the subject's fat mass, the dry body weight range is determined. How an electronic device operates.

3. In paragraph 2, The movement that determines the above dry weight range is Determine the target extracellular water that must change for the current ratio to fall within the reference ratio range; Based on the target extracellular water and the ratio between the predetermined extracellular water and the fat-free mass, the target fat-free mass is determined. How an electronic device operates.

4. In paragraph 1, The movement that determines the above dry weight range is Based on the above dry weight range, the weight adjustment amount for the subject's weight to be included in the above dry weight range is determined. How an electronic device operates.

5. In paragraph 1, The action of comparing the above current ratio and the above reference ratio range is Based on the average ratio and predetermined standard deviation range between extracellular water and lean body mass of the general population for the sex and / or age of the above-mentioned subject, the above-mentioned reference ratio range is determined. How an electronic device operates.

6. In paragraph 1, The above action of compensating extracellular moisture is Based on the extracellular water of the body and the percentage body fat (PBF) of the body, determining the extracellular water contained in the fat of the body. How an electronic device operates.

7. In paragraph 1, An action of providing the above current ratio, the above reference ratio range, and the above dry weight range to the above test subject. Including more How an electronic device operates.

8. A computer-readable recording medium storing a computer program for executing any one of the methods of clauses 1 to 7.

9. In electronic devices, processor; and Memory that stores instructions Including, The above instructions, when executed by the processor, cause the electronic device to: Obtain the extracellular water and lean body mass of the subject, Based on the extracellular water contained in the fat of the above body, the extracellular water is corrected, By comparing the current ratio between the above-mentioned corrected extracellular water and the above-mentioned lean body mass with the reference ratio range for a normal body fluid state, a dry body weight range for the subject is determined so that the current ratio falls within the reference ratio range. Electronic devices.

10. In paragraph 9, The above instructions, when executed by the processor, cause the electronic device to: When the above-mentioned corrected extracellular water and the above-mentioned lean body mass are changed according to a predetermined ratio between the extracellular water and lean body mass, the target lean body mass that must be changed for the current ratio to be included in the above-mentioned reference ratio range is determined, Based on the target lean body mass and the subject's fat mass, the dry body weight range is determined. Electronic devices.

11. In paragraph 10, The above instructions, when executed by the processor, cause the electronic device to: Determine the target extracellular water that must change for the current ratio to fall within the reference ratio range; Based on the target extracellular water and the ratio between the predetermined extracellular water and the fat-free mass, the target fat-free mass is determined. Electronic devices.

12. In paragraph 9, The above instructions, when executed by the processor, cause the electronic device to: Based on the above dry weight range, the weight adjustment amount is determined so that the weight of the subject is included in the above dry weight range. Electronic devices.

13. In paragraph 9, The above instructions, when executed by the processor, cause the electronic device to: To determine the reference ratio range based on the average ratio between extracellular water and lean body mass and a predetermined standard deviation range of the general population for the sex and / or age of the subject. Electronic devices.

14. In paragraph 9, The above instructions, when executed by the processor, cause the electronic device to: Based on the extracellular water of the body and the body fat percentage of the body, the extracellular water contained in the fat of the body is determined. Electronic devices.

15. In paragraph 9, The above instructions, when executed by the processor, cause the electronic device to: To provide the above current ratio, the above reference ratio range and the above dry weight range to the above test subject, Electronic devices.

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