KR20050050992A - Apparatus and method for measuring segmental body fat using bioelectrical impedance - Google Patents

Abstract

The present invention relates to a bioelectrical impedance body fat analyzer for each site, and more specifically, to measure the thickness of the subcutaneous fat of the body part separately, and to use the measured subcutaneous fat thickness for calculation to measure the body fat for each body part more accurately. It relates to a star bioelectric body fat analyzer.

The bioelectrical impedance measuring instrument of the present invention selects an impedance measuring circuit (19) consisting of a current electrode and a voltage electrode (31 to 38) in contact with a subject's hands and feet, a current applying circuit and a voltage measuring circuit, and a measurement target part of the body. An electronic switch 18 for inputting information, an input unit 12 for inputting information such as gender age and body measurement data of the subject, a display unit 39 for displaying a measurement state and a result, a weight measuring unit 16 for measuring weight, and arithmetic And a central control unit 22 which performs a control function and measures a body fat for each body part using bioelectrical impedance, wherein the subcutaneous fat measuring system 40 measures the thickness of subcutaneous fat at any one or more of the body parts. And the subcutaneous fat input measured by the subcutaneous fat thickness is additionally input to the central control unit; and outputs the body fat amount for each body part calculated using the subcutaneous fat thickness Is composed of an output unit.

Description

Apparatus And Method For Measuring Segmental Body Fat Using Bioelectrical Impedance

The present invention relates to a bioelectrical impedance body fat analyzer for each site, and more specifically, to measure the thickness of the subcutaneous fat of the body part separately, and to use the measured subcutaneous fat thickness for calculation to measure the body fat for each body part more accurately. It relates to a star bioelectric body fat analyzer.

Components of the human body can be largely divided into water, protein, bone (mineral) and fat, and the quantitative measurement of these components is called body composition analysis. Body composition analysis is widely used as a test that provides the most basic and essential information for checking the health of a subject, and is representatively effective in determining diseases and symptoms such as obesity, osteoporosis, malnutrition, and edema. In particular, in modern people, obesity-related diseases such as adult diseases are emerging due to busy daily life and western-style eating habits.Body composition analysis shows the ratio of body fat to body weight to accurately diagnose obesity and is essential for its treatment. . Components other than body fat are called fat free mass (FFM), and muscle accounts for a large portion. Therefore, lean body mass can diagnose the level of muscle development of a subject, the nutritional status of a cancer patient or a wasting disease, the speed of disease progression, and the therapeutic effect.

In the body composition analysis, various methods such as aquatic body density method, sebum method, and near-infrared method are used, but the most widely used method is a bioelectrical impedance analysis (BIA). The bioelectrical impedance method flows weak alternating current into the human body and measures the electrical resistance or electrical conductivity of the human body and calculates it along with body weight and height measurements to calculate the amount of fluid (water content), the balance of moisture in and out of cells, It is a method for calculating the amount of fat-free fat and body fat.

The bioelectrical impedance method is based on the fact that current flows through moisture in the human body. Fat-fat contains approximately 73% of moisture, which is an electrical conductor. Assuming that the volume V of the conductor through which the current passes is constant in cross section, the length L and impedance Z of the conductor have the following relationship.

V ∝ L ² / Z (Ⅰ)

Therefore, the lean body mass (FFM) containing a certain ratio of water can be expressed by the following equation according to the height (H _O ) and bioimpedance (Z).

FFM ∝ H _O ² / Z (Ⅱ)

According to this principle, the lean body mass of the subject can be calculated by measuring the height of the subject and measuring the electrical resistance, that is, the impedance to the whole body. The water content in the body can be measured in the same way because it maintains a constant ratio with the lean body mass, and the muscle mass is also related to the lean body mass can be measured on the same principle.

Fats, on the other hand, contain little moisture and are electrically insulators. Therefore, such fat component is not a component that can be directly measured by the bioelectric impedance method, unlike lean body fat. However, since the sum of the body fat amount and the lean body mass corresponds to the body weight, if the weight is measured and the lean body mass is measured as described above, the amount of body fat can be calculated from the difference between the two values. On the other hand, the measurement by site provides information to determine the level of muscle development of each part of the subject, it is very useful to check the effects of exercise by each part, left and right balance status, upper and lower body development, the effect of rehabilitation treatment. Like the body composition analysis of the whole body, by measuring the impedance of each part can be analyzed by body parts such as arms, legs, torso. Fat loss amount (FFM _i ) for each region is expressed as follows according to the height and impedance by region (Z _i ).

FFM _i (or muscle mass by site) ∝ H _O ² / Z _i (Ⅲ)

In theory, the actual length of each part should be applied instead of the elongation, but considering the convenience of the measurement, it is not a big difference in accuracy even if it is replaced by the elongation. That is, humans generally have a certain proportion of arms, legs, and torso lengths depending on their height, and commercially available body composition analyzers generally adopt this assumption.

The technique of measuring the impedance of each part includes a method of measuring the impedance between the ends of the human body through a total of eight electrodes by installing two electrodes on both hands and both feet. In general, the impedance values for five parts of the human body are measured by measuring the end-to-end impedance between the hands and hands, feet and feet, left and left feet, right and right feet, left and right feet (diagonal), and right and left feet (diagonal). The method of calculating through simultaneous equations is used.

<Table: Measurement of Impedance by Human Body Part>

Used electrode Measurement area Measure 1 Left hand, right hand Left arm + right arm Measure 2 Left foot, right foot Left leg + right leg Measure 3 Left hand, left foot Left arm + torso + left leg Measure 4 Right hand, right foot Right arm + torso + right leg Measure 5 Left hand, right foot Left arm + torso + right leg Measure 6 Right hand, left foot Right arm + torso + left leg

That is, as shown in the table, five or six impedance measurements are performed between different end portions of a human body including a plurality of sites, and then the impedance values of the five sites are divided and calculated through a simultaneous equation. However, this method has a problem in that the measurement error generated in each measurement is uniformly applied to the trunk portion having a very small impedance value compared to the arms and legs in the solution of the simultaneous equation. The torso is a quantitatively large part of the whole body, and the error in the torso part is a factor that hinders the accuracy of the whole body composition analysis.

The proposer of the present invention has invented a measurement method for each site that can directly measure each site by improving the disadvantages of the conventional method for measuring each site (Korean Patent No. 10-0161602, US Patent US 5,720,296). Figure 1 illustrates the modeling of the human body according to the above method, which does not indirectly calculate the impedance for each part through an equation, but can directly measure the impedance for each part in each measurement. In general, the method of measuring impedance flows a current of a known magnitude and measures voltage at a desired area to obtain impedance according to Ohm's law. These devices include electrodes (1 ~ 8), impedance measuring circuits, electronic switches, and amplifiers. It consists of A / D converter and central control unit. In the conventional site-specific measurement, the electrode of the current and the electrode of the voltage are always located at the same end site, but in the proposed method, the arrangement of the electrodes is freely set according to the measurement site.

For example, in order to measure the impedance Z _ra of the right arm, the right hand electrode 1 and the right foot electrode 5 are connected to a current terminal, and the other electrode 2 and the left hand electrode 4 of the right hand are connected to a voltage terminal. Impedance measurement is possible in the area of the right arm where the current flows and the voltage is measured. In order to measure the impedance Z _t of the body, the right hand electrode 1 and the right foot electrode 5 are connected to a current terminal, and the left hand electrode 4 and the left foot electrode 8 are connected to a voltage terminal. In the case of the right leg impedance Z _rl , the right hand electrode 1 and the right foot electrode 5 are connected to the current terminal, and the other electrode 6 and the left foot electrode 8 of the right foot are connected to the voltage terminal. The left arm and the left leg can be measured by changing the impedance measurement and the left and right of the right arm and the right leg, respectively. This method is basically based on the theory that the voltage drop only occurs where the actual current flows. This method of impedance measurement for each part does not occur the propagation of unnecessary errors that occur in the solution of the simultaneous equations, and by directly measuring only the desired part separately, it focuses precisely on the torso part, which is difficult to measure due to respiration, heart rate, etc. can do.

On the other hand, a method for measuring the body composition of the trunk such as abdominal visceral fat or subcutaneous fat is described in Japanese Patent Application No. 99-164633 or Patent Application 99-164634. This is a direct measurement of the thickness of abdominal circumference and abdominal subcutaneous fat to calculate the amount of abdominal visceral fat and subcutaneous subcutaneous fat. The total amount of fat is calculated from the direct measurement of circumference and subcutaneous fat based on the fact that it correlates with visceral fat and total abdominal fat. In other words, the total fat was obtained from the bioimpedance measurement and the abdominal fat area was calculated using the correlation between the abdominal fat area and the total fat amount. Although the above application obtained the distribution of abdominal fat by directly measuring the thickness and circumference of subcutaneous fat in impedance measurement, it does not calculate the body fat distribution for each site only by using the correlation between the abdomen and the total body fat.

On the other hand, in the bioelectric impedance method, the body fat amount obtained by subtracting the lean body mass from the total amount can not be calculated in principle, because the weight of each part can not be calculated individually. However, considering the gender and age, the body size and body size of the subject can be estimated from the weight or height of the subject. Therefore, the approximate body fat amount is estimated by including the empirical and statistical predictions in the impedance measurement for each region. The method is also used. By measuring the impedance of each part, it is possible to confirm the distribution of the internal body type, that is, the fat-free fat of the subject, and the approximate tendency of the subject from the fact that the distribution of body fat according to the total amount of body fat, sex, and age tends to be rough. The distribution of body fat by region can be estimated. However, the statistical predictive value is also not accurate for individual subjects, and thus it is not a case that a large amount of error is included in the measured body fat mass.

The present invention proposes a method for overcoming inaccuracies and limitations of the measurement of body fat mass by site, and an object of the present invention is to add a subcutaneous fat measurement by a sebaceous gland (or a subcutaneous fat measuring system) to a body composition analyzer. It is to provide a method to measure body fat more accurately and to calculate body circumference.

Another object of the present invention is to add a method of directly measuring the subcutaneous fat of a specific part such as the trunk or leg in measuring the amount of body fat for each part to more precisely measure the fat distribution of each part by the conventional bioimpedance method. have.

The present invention has been conceived in that it is possible to predict the overall body fat distribution much more precisely by additionally measuring the thickness of subcutaneous fat at a specific site such as the upper arm and the body fat measurement by the conventional impedance method. Since subcutaneous fat is generally distributed like a circumferential fat component, the measurement of subcutaneous fat predicts the distribution of body fat in each part especially in the parts such as arms and legs and calculates the body circumference for each part to provide accurate information about the body type. do.

In order to achieve the above object, in one embodiment of the present invention, the impedance measuring circuit 19 consisting of a current electrode and a voltage electrode (31 to 38) in contact with the subject's hands and feet, a current application circuit and a voltage measurement circuit, An electronic switch 18 for selecting a measurement target site of the body, an input unit 12 for inputting information such as a gender age and body measurement data of the subject, a display unit 39 for displaying a measurement state and a result, and a weight for measuring weight In the measuring device 16 and the central control unit 22 for performing arithmetic and control functions to measure the body fat for each body part using a bioelectrical impedance,

Subcutaneous fat measuring system 40 for measuring the thickness of the subcutaneous fat in any one or more of the body parts; and the subcutaneous fat input unit that the measured subcutaneous fat thickness is further input to the central control unit 22; and subcutaneous fat thickness And an output unit 11 for outputting the body fat amount calculated for each body part.

In an embodiment of the present invention, the body part for subcutaneous fat measurement is characterized in that at least one of the upper arm, legs, abdomen.

In addition, in one embodiment of the present invention, the measurement of the subcutaneous fat proposes a bioelectrical impedance body fat analyzer, characterized in that the measurement data is automatically input using a sebum meter using an electronic sebum meter or a near infrared ray method.

In addition, in one embodiment of the present invention, the subcutaneous fat measuring system proposes a bioelectric impedance body fat analyzer, characterized in that configured to be separated from the body portion of the body fat analyzer.

In addition, according to one embodiment of the present invention, the output unit proposes a body-based bioelectrical impedance body fat analyzer, characterized in that the output includes the calculated perimeter.

The body electric body impedance body fat measuring method according to the present invention includes an impedance measuring circuit (19) consisting of a current electrode and a voltage electrode (31 to 38) in contact with the subject's hands and feet, a current applying circuit and a voltage measuring circuit, An electronic switch 18 for selecting a measurement target site of the body, an input unit 12 for inputting information such as a gender age and body measurement data of the subject, a display unit 39 for displaying a measurement state and a result, and a weight for measuring weight Measuring lean body mass for each body part using a bioelectrical impedance measuring instrument including a measuring unit 16 and a central control unit 22 performing arithmetic and control functions; and

Measuring the thickness of the subcutaneous fat in at least one portion of the body part; and

And calculating the thickness of the subcutaneous fat from the lean body mass in the body part where the thickness of the subcutaneous fat is not measured.

In addition, the body electric body impedance body fat measurement method for measuring the body circumference of the present invention, the impedance consisting of a current electrode and voltage electrodes (31 to 38), a current application circuit and a voltage measurement circuit in contact with the hand and foot of the subject The measuring circuit 19, an electronic switch 18 for selecting a measurement target site of the body, an input unit 12 for inputting information such as the gender age and body measurement data of the subject, and a display unit 39 for displaying the measurement state and the result. Measuring lean body mass for each body part using a bioelectrical impedance measuring instrument including a weight measuring unit 16 measuring weight and a central controller 22 performing arithmetic and control functions; and

Measuring the thickness of the subcutaneous fat in at least one portion of the body part; and

Calculating the thickness of the subcutaneous fat from the lean body mass in a body part whose thickness of the subcutaneous fat is not measured; and

Comprising a step of calculating the body circumference for each part from the thickness of the subcutaneous fat for each site and the amount of fat-free fat.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 shows a schematic configuration diagram of a bioelectric impedance body fat measuring apparatus according to the present invention and Figure 3 shows a specific example of the bioelectric impedance body fat measuring apparatus according to the present invention. Impedance measurement is carried out in the same manner as in the conventional method, an impedance measuring circuit 19 consisting of electrodes 31 to 38 in contact with hands and feet, a current application circuit and a voltage application circuit, and an electronic switch for selecting a measurement target part of the body. ), An input unit 12 through a keypad for inputting information such as gender, age, and body measurement data of the subject, a display unit 39 for displaying a measurement state and a result, a weight measuring unit 16 for measuring weight, and an amplifier 20 23, 24, and an A / D converter 21 and a central control unit 22 that performs arithmetic and control functions. In Fig. 3, a skin-fold calipers 40 for measuring the thickness of the subcutaneous fat at the main body 30 and the local parts are shown. The sebaceous gauge is a circular scale used for measuring the thickness of the subcutaneous fat. It is widely used for body fat measurement (skin-fold thickness) and nutritional status determination using a sebaceous system. For the bioimpedance measurement according to the present invention, the subject inputs the subject's information such as gender, age, height, etc. before measuring the impedance. Information that can be measured, such as height, can be automatically entered into a separate measurement tool, such as an ultrasonic extensometer or displacement gauge. In addition, personal information such as gender and age may allow the body composition analyzer to read data of a personal card (not shown) in which the subject's health history is input. Such an input device may be variously modified as needed by those skilled in the art, but it is within the scope of the present invention.

After various input processes are performed, the subject grasps the left hand electrodes 32 and 33 and the right hand electrodes 31 and 34 formed on the handle with both hands, and the right foot electrodes 35 and 36 and the left foot electrodes 37, 38), the load sensor (not shown) in the lower portion of the power pole can measure the load of the subject. Impedance current is measured for impedance measurement and the voltage is measured at the desired area to obtain the impedance according to Ohm's law.The electrodes 31-38, the impedance measurement circuit 19, the electronic switch 18, and the amplifier ( 20, 23 and 24, the A / D converter 21 and the central controller 22. In the conventional site-specific measurement, the electrode of the current and the electrode of the voltage are always located in the same site, but in the proposed method, the arrangement of the electrodes is freely set according to the measurement site. By directly measuring only the desired area, the error caused by the existing simultaneous equations is reduced as described above.

On the other hand, the method of measuring the thickness of the subcutaneous fat using a sebaceous gland, as shown in Figures 4a and 4b, the measurer pinch the skin slightly at a specific part of the subject to allow the subcutaneous fat (50) to overlap in two layers and the thickness It is a way to measure. How to hold the subcutaneous fat, except the muscles and fascia so that only the epidermis and subcutaneous fat is caught, measured by the sebaceous gland about 1cm away from the finger position, and read the scale of the sebaceous gland. Since this is a method of measuring the thickness of subcutaneous fat directly, the thickness of the subcutaneous fat at the measurement site can be accurately known. The input unit for inputting the measured thickness of the subcutaneous fat into the central control unit is input to the body composition analyzer through an input device such as a keypad, or the electronic sebum meter is directly connected to the body composition analyzer through the connection terminal 42 as shown in FIG. The measurement can be sent automatically to the central control unit.

As a method of measuring the thickness of subcutaneous fat, there is a method using near-infrared rays or ultrasound in addition to the sebaceous gland, which measures the thickness of the subcutaneous fat and inputs it into a body composition analyzer manually or automatically to measure the distribution of body fat by region.

In addition, the sebum arrest is preferably formed to be separated from the main body by configuring a connection terminal on one side of the main body 30 of the bioelectric impedance body fat analyzer. The connection terminal 42 for the transmission of the sebum measurement value can be configured separately on one side of the main body as described above, but is transmitted through various connection ports such as a printer connection port (Parallel; IEEE1284), RS232C, USB, etc. already installed. It is also possible.

The amount of water (TBW) contained in the entire body is the sum of the amounts of water for each part, and is represented by the following formula (IV).

TBW = a ₁ H _o ² / Z _ra + a ₂ H _o ² / Z _la + a ₃ H _o ² / Z _t + a ₄ H _o ² / Z _ra + a ₅ H _o ² / Z _la (Ⅳ)

Where ra is the right arm, la is the left arm, t is the torso, rl is the right leg, ll is the left leg, and a ₁ , a ₂ , a ₃ , a ₄ , a ₅ satisfies Eq. (IV) Constant is determined by regression analysis. Equation (IV) is incorporated in the central control unit 22 as a program. Since body fat has very low moisture content among the constituents of the human body, the amount of water present in body fat is ignored and the fat-free component contains about 73% water, so the lean body mass (FFM) can be divided by 0.73 from the amount of water. .

To calculate Segmental Lean Mass (SLM), use the following formula.

SLM _ra = b _1ra × Z _ra + b _2ra × W _o + b _3ra × H _o + b _4ra

_{SLM la = b 1la × Z la} + b 2la × W o + b 3la × H o + b 4la

SLM _t = b _1t × Z _t + b _2t × W _o + b _3t × H _o + b _4t (Ⅴ)

_Rl = b × Z _{1rl rl} SLM + b _2rl × W × H _o + b _o + b _{3rl 4rl}

_{SLM ll = b 1ll × Z ll} + b 2ll × W o + b 3ll × H o + b 4ll

W _o is the weight.

In the above formula (V), constant values of b _1i to b _4i (where i denotes a body part and ra, la, t, rl or ll) are DEXA (Dual energy x-ray absorptiometry), etc. in many subjects. Using the device with the measurement function for each part, the value that satisfies the reference value is obtained using the regression model. The completed formula is embedded in the central control unit.

When the muscle mass for each site is obtained, the circumference of the site muscle is calculated based on the cylindrical model of FIG. That is, FIG. 5 uses the anatomical basis that the subcutaneous fat surrounds the outside of the cylindrical muscle as a cylindrical model of each body part. Partial muscle mass (V _i ) is expressed by the following equation.

(Ⅵ)

Where L _i is the site-specific length. In the cylindrical model, when the circumference of the internal muscle is CI _i (inner circumference), the volume of muscle mass (V _i ) is expressed by the following equation.

(Ⅷ)

Therefore, muscle circumference by region (CI _i )

(Ⅸ)

By assuming that the body parts are not accurate cylinders and the length of each part is proportional to the height, the muscle circumference for each part can be obtained as follows.

(Ⅹ)

The body fat amount (SFM _i ) for each site is

(Vii)

SF _i is the subcutaneous fat layer thickness as shown in the figure. Assuming that the distribution of fat is uniform for each site and the length is proportional to height,

(XII)

The correction constants d _1i and d _2i are corrected by the body fat amount of each part through a device such as DEXA.

The sum of SFM _i obtained by each site and the body fat mass of the head equals the total body fat mass. It is common to assume that the head has a certain amount of body fat.

Even in areas where the thickness of subcutaneous fat is not measured, the sum of SFM _i is the total body fat mass. When the distribution of fat in the human body is divided into three parts of arms, legs, and torso, the value of the two parts is measured by sebum, and the rest is obtained by excluding the measuring part from the total amount. In addition, when one part is measured, the remaining two parts should be divided into empirical variables. Even in this case, since the body fat amount of one part is known, the accuracy can be predicted with higher precision than without the sebum method.

In this way, when the amount of body fat for each part is obtained, the outer circumference (CO _i ) can be measured in consideration of the thickness of the fat around the muscle.

(XIII)

Constants such as f _1i and f _2i can be set in advance according to the perimeter of each part previously measured through a tape measure to obtain the perimeter of each part of the body. Looking at the above measurement process, it is not possible to obtain the body fat amount of each site by measuring the thickness of each site (sebaceous method) alone. That is, even if the subcutaneous fat thickness is the same in all areas, the total amount of fat is different when the arm circumference is large and small. However, by measuring the circumference of the muscle and the inner circumference by using the impedance method as in the present invention, it is possible to accurately calculate the amount of fat in the site.

The thickness of the subcutaneous fat can be measured in one or more places, such as the upper arm, thighs, chest, abdomen, and can be measured by selecting a specific site as needed.

6 is a flowchart illustrating a method of measuring body fat impedance by body according to the present invention, which includes measuring a lean body fat amount per body part using a body bioimpedance meter (S100); and any one of body parts. It includes a step (S110) of measuring the thickness of the subcutaneous fat in the portion or more; and the step of calculating the thickness of the subcutaneous fat from the lean body mass in the body portion where the thickness of the subcutaneous fat is not measured (S120). The method may include outputting the body fat measurement value for each body part (S130) as necessary. As described above, the bioelectrical impedance measuring device is based on the body fat measuring device for each part shown in FIG. In addition, the thickness of the subcutaneous fat can be directly measured using a sebaceous gland, and the body fat amount of each part can be obtained by using the sum of the total body fat mass of each part in the body parts where the thickness of the subcutaneous fat is not measured. That is, the site | part not measured by the sebum method is calculated | required by excluding a measurement site | part from the total amount.

FIG. 7 is a flowchart illustrating a method of measuring body circumference for each part using the bioelectric impedance body fat measurement method according to the present invention, which includes: measuring lean body mass per body part using a bioelectric impedance tester (S100); And measuring the thickness of the subcutaneous fat in any one or more parts of the body part (S110); and calculating the thickness of the subcutaneous fat from the lean body mass in the body part where the thickness of the subcutaneous fat is not measured (S120); and It may include a calculation step (S140) of the per circumference of the body part. As described above, the bioelectrical impedance measuring device is based on the body fat measuring device for each part shown in FIG. In addition, the thickness of the subcutaneous fat is measured directly by using a sebaceous gland, and the portion not measured by the sebaceous gage is obtained by excluding the measurement site from the total amount. Finally, it can be obtained by calculating the perimeter of each body part using the equation (XIII).

As described above, the present invention exhibits the effect of determining the amount of fat per site from the measurement of the impedance of each site and the measurement of the thickness of the subcutaneous fat, and provides a method for accurately predicting the remaining sites even without performing a sebum-free method on the entire site.

According to the present invention, it is possible to determine the body shape by calculating the circumference of each body part by knowing the impedance measurement for each part and the body fat amount for each part.

As described above, in the simple modification of the present invention, the modification of the method of transmitting the measured value of the sebaceous gland, the modification of the installation and storage of the sebaceous gland, and the modification of the bioimpedance measurement method of each region Is apparent to those skilled in the art to which the invention pertains, and such changes or modifications are limited by the appended claims.

1 is a view showing the electrode contact position and the impedance model of the human body of the general human component measuring apparatus.

Figure 2 is a schematic diagram of the electrical circuit configuration of the human body composition measuring apparatus according to the present invention.

3 is a view showing a specific example of the site-specific bioelectric impedance body fat analyzer according to the present invention.

Figure 4a is a view showing a measuring method of the sebaceous gland,

It is sectional drawing which shows the measurement of subcutaneous fat using a sebaceous gland.

Figure 5 is a model showing the body moisture and body fat of a part of the body.

6 is a flowchart of a method for measuring body bioelectric impedance body fat according to the present invention.

7 is a flow chart of the body circumference measurement method for each part using the bioelectric impedance body fat measurement method according to the present invention.

<Explanation of symbols for the main parts of the drawings>

11 output unit 12 keypad

16: weight measuring unit 18: switch

19: impedance measuring unit 22: central control unit

20,23,24: Amplifier 21: A / D converter

30: main body of impedance measuring instrument 31 ~ 38: electrode

39: display unit 40: subcutaneous fat measuring instrument or sebum measuring instrument

42: connecting terminal of the sebaceous system 43: clamp

50: subcutaneous fat of the local area 51: fat removal of the local site

Claims (9)

Current and voltage electrodes 31 to 38 in contact with the hands and feet of the subject, an impedance measuring circuit 19 composed of a current applying circuit and a voltage measuring circuit, an electronic switch 18 for selecting a measurement target part of the body, and the subject An input unit 12 for inputting information such as gender, age, and body measurement data, a display unit 39 for displaying measurement status and results, a weight measuring unit 16 for measuring weight, and a central control unit for performing calculation and control function ( 22) is a measuring device for measuring the body fat by body parts using a bioelectrical impedance, Subcutaneous fat measuring system 40 for measuring the thickness of the subcutaneous fat in any one or more of the body parts; and the subcutaneous fat input unit that the measured subcutaneous fat thickness is further input to the central control unit 22; and subcutaneous fat thickness Bioelectric impedance body fat measuring device for each body part, including; an output unit 11 for outputting the body fat amount calculated for each body part The method according to claim 1, The body parts for subcutaneous fat measurement are any one or more of the upper arm, leg, and abdomen. The method according to claim 1, The measurement of subcutaneous fat is performed using an electronic sebum meter or near infrared method, and the measurement data is automatically input. The method according to claim 1, The subcutaneous fat measuring system is a bioelectrical impedance body fat measuring device for each body part, characterized in that configured to be separated from the body portion of the body fat analyzer The method according to claim 1, The output unit includes a calculated body circumference per body part bioelectrical impedance body fat measuring unit, characterized in that the output Current and voltage electrodes 31 to 38 in contact with the hands and feet of the subject, an impedance measuring circuit 19 composed of a current applying circuit and a voltage measuring circuit, an electronic switch 18 for selecting a measurement target part of the body, and the subject An input unit 12 for inputting information such as gender, age, and body measurement data, a display unit 39 for displaying measurement status and results, a weight measuring unit 16 for measuring weight, and a central control unit for performing calculation and control function ( Measuring lean body mass for each body part using a bioelectrical impedance measuring instrument (22); and Measuring the thickness of the subcutaneous fat in any one or more parts of the body part (S110); And Bio-impedance body fat measurement method for each body part, characterized in that it comprises a; in the body part is not measured the thickness of the subcutaneous fat, the step of calculating the thickness of the subcutaneous fat from the fat-free fat (S120) The method according to claim 6, The body part for subcutaneous fat measurement is bioelectric impedance body fat measurement method for each body part, characterized in that any one or more of the upper arm, leg, abdomen. The method according to claim 6, The measurement of subcutaneous fat using an electronic sebaceous gland or near-infrared method and the measurement data is automatically input bioelectrical impedance body fat measurement method for each body part Current and voltage electrodes 31 to 38 in contact with the hands and feet of the subject, an impedance measuring circuit 19 composed of a current applying circuit and a voltage measuring circuit, an electronic switch 18 for selecting a measurement target part of the body, and the subject An input unit 12 for inputting information such as gender, age, and body measurement data, a display unit 39 for displaying measurement status and results, a weight measuring unit 16 for measuring weight, and a central control unit for performing calculation and control function ( Measuring lean body mass for each body part using a bioelectrical impedance measuring instrument (22); and Measuring the thickness of the subcutaneous fat in any one or more parts of the body part (S110); And Calculating the thickness of the subcutaneous fat from the lean body mass in a body part whose thickness of the subcutaneous fat is not measured (S120); and Comprising the step of calculating the body circumference for each part from the thickness and fat-free fat amount of each subcutaneous fat (S140); bioelectrical impedance body fat measurement method for each part, comprising a