JP2006015039A - Living body electric impedance measuring apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a living body electric impedance measuring apparatus which can be used in changing the mode of an electrode plate type and a sticking type easily. <P>SOLUTION: The living body electric impedance measuring apparatus is equipped with at least a set of plate type electrodes for conducting electricity between two different sites of a living body, at least one set of plate type measuring electrodes for measuring a potential difference in electric channels currently conducting, at least a set of sticking type electrodes for conducting electricity between two different sites of the living body, at least one set of sticking type measuring electrodes for measuring a potential difference in electric channels currently conducting, and a main body having an arithmetic device for calculating a living body electric impedance based on values of electric current and a measured voltage. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bioelectrical impedance measuring apparatus, and more particularly to a bioelectrical impedance measuring apparatus that can use two types of electrodes, an electrode plate type and an adhesive type.

  A device is known in which a weak current is passed between two parts of a living body, a potential difference between the two parts in the current path is measured, and a bioelectrical impedance is measured from the current value and the potential difference (voltage value). Such a bioelectrical impedance measuring apparatus measures, for example, the bioelectrical impedance of a human body, and substitutes the bioelectrical impedance measured together with personal data such as the height, weight, sex, and age of the person into a predetermined regression equation. It is applied to a so-called body composition meter that calculates body composition such as body fat, visceral fat, body water, muscle, bone, and basal metabolism of the person.

  In such a bioelectrical impedance measuring apparatus, there are roughly two types of electrodes that come into contact with the living body for supplying current and measuring voltage. One is a “electrode plate type” made of a metal or a resin on which a conductive material is deposited (see, for example, Patent Document 1), and the other is a “stick type” using a conductive gel or the like. Yes (for example, see Patent Documents 2 and 3).

JP 2001-104272 A WO 98/36686 pamphlet U.S. Pat. No. 4,0087,211

  The electrode plate type electrode has an advantage that bioelectrical impedance can be easily measured simply by riding on the sole so that the sole contacts it or by grasping it with a hand. However, the electrode plate type electrode has a disadvantage that the contact area between the living body and the contact impedance increases depending on the shape of the electrode plate. The contact impedance also increases when the contacting skin is dry. An increase in contact impedance makes the measurement of bioelectrical impedance unstable. In addition, when the electrode plate is held by hand, changes in muscle shape and blood flow may occur, which may affect the measured value. In addition, in the case of a subject who has a disorder in the limb that is in contact with the electrode plate (when there are no extremities), or in the case of a subject who is bedridden and cannot stand on the electrode plate or hold the electrode, The plate mold cannot be used.

  On the other hand, the patch-type electrode has an advantage that bioelectrical impedance can be stably measured. In other words, the contact type with the living body often has a gel-like contact portion, and therefore is in close contact with the skin surface, so that the problem of increased contact impedance unlike the electrode plate type hardly occurs. Moreover, since the gel-like electrode has a high moisture content, it is not easily affected by dry skin. In addition, changes in muscle shape due to movements such as grasping electrodes and changes in bioelectrical impedance due to changes in blood flow hardly occur. However, the affixing type electrode has the disadvantages that it is troublesome to handle such as having to affix the electrode to a designated part of the body and is not suitable for simple bioelectrical impedance measurement. When bioelectrical impedance measurement is performed for a large number of subjects such as a mass examination, it takes a very long time. Moreover, since the electrodes are usually disposable, there is a problem in terms of cost.

  As described above, both the electrode plate type and the sticking type have their advantages and disadvantages, and it cannot be generally said which is superior. Depending on the condition of the person being measured, it is desirable to use them properly from the viewpoints of measurement stability and convenience. However, in the conventional bioelectrical impedance measuring device, only one of the electrode plate type and the sticking type electrode is adopted, and in order to use these properly, two types of devices adopting the respective types must be prepared. I had to. Accordingly, an object of the present invention is to provide a bioelectrical impedance measuring apparatus that can be used by easily switching between an electrode plate type and a pasting type.

  The bioelectrical impedance measuring apparatus of the present invention includes at least one set of electrode plate-type energized electrodes for energizing between two parts of a living body and at least one set of electrode plate-types for measuring a potential difference in an energized current path. A measuring electrode, at least one pair of energizing electrodes for energizing between two parts of a living body, at least one set of encasing measuring electrodes for measuring a potential difference in an energizing current path, and an energizing current And a main body having an arithmetic device for calculating bioelectrical impedance based on the value and the measured voltage value.

  Here, in the bioelectrical impedance measuring device of the present invention, it is desirable that at least the pasting-type energizing electrode and the pasting-type measuring electrode are detachable from the main body.

  Moreover, the bioelectrical impedance measuring apparatus of the present invention indicates a part of a living body to which each electrode is to be attached when measuring bioelectrical impedance using the pasting-type energizing electrode and the pasting-type measuring electrode. The apparatus further includes a sticking part indicating device, and the arithmetic unit calculates a bioelectrical impedance based on the energized current value and the measured voltage value, and the calculated bioelectrical impedance is converted into a regression equation corresponding to the instructed part. It is desirable to substitute for calculating the body composition of the living body.

  Since the bioelectrical impedance measuring device of the present invention includes both electrode plate type and adhesive type electrodes, it is possible to maintain the state of the subject without preparing two types of devices that employ the respective types of electrodes. Accordingly, from the viewpoint of measurement stability, simplicity, etc., it is possible to easily switch between the electrode plate type electrode and the pasted type electrode for use.

  Here, when the pasting-type energizing electrode and the pasting-type measuring electrode are made detachable from the main body, these pasting-type electrodes are used when performing measurement with an emphasis on simplicity using the electrode plate-type electrode. Can be removed from the body. Since the paste-type electrode is assumed to be applied to various parts of the living body, it is connected to the main body with a relatively long electric cable. Since long electric cables are complicated to handle, they are literally useless long objects when measuring with emphasis on simplicity. Therefore, by making the attachment type electrode detachable, it is possible to remove the electrode plate type electrode when using it, and to improve the convenience of measurement.

  In addition, the site where the patch-type electrode is to be applied is instructed by the application site indicating device, and the arithmetic device calculates the bioelectrical impedance and uses the regression equation corresponding to the instructed region for the calculated bioelectrical impedance. When the body composition of the living body is calculated by substituting, it is possible to stably measure the bioelectrical impedance and accurately calculate the body composition based on the bioelectrical impedance. The regression equation for calculating the body composition needs to be changed to an optimum one according to the measurement target section of the bioelectrical impedance, that is, the electrode application site. Accordingly, the site where the patch-type electrode is to be applied is instructed by the application site indicating device, and the body composition is calculated using a regression equation corresponding to the instructed site, so that a highly stable living body can be obtained. Electrical impedance measurement and accurate body composition calculation are possible.

  The bioelectrical impedance measuring apparatus of the present invention includes at least one set of electrode plate-type energized electrodes for energizing between two parts of a living body and at least one set of electrode plate-types for measuring a potential difference in an energized current path. A measuring electrode, at least one pair of energizing electrodes for energizing between two parts of a living body, at least one set of encasing measuring electrodes for measuring a potential difference in an energizing current path, and an energizing current And a main body having an arithmetic device for calculating bioelectrical impedance based on the value and the measured voltage value.

  Here, in the bioelectrical impedance measuring device of the present invention, it is desirable that at least the pasting-type energizing electrode and the pasting-type measuring electrode are detachable from the main body.

  Moreover, the bioelectrical impedance measuring apparatus of the present invention indicates a part of a living body to which each electrode is to be attached when measuring bioelectrical impedance using the pasting-type energizing electrode and the pasting-type measuring electrode. The apparatus further includes a sticking part indicating device, and the arithmetic unit calculates a bioelectrical impedance based on the energized current value and the measured voltage value, and the calculated bioelectrical impedance is converted into a regression equation corresponding to the instructed part. It is desirable to substitute for calculating the body composition of the living body.

  A preferred first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an external view of a body composition meter 1 to which a bioelectrical impedance measuring apparatus according to the present invention is applied. FIG. 2 is an external view of the electrode portion of the body composition meter 1. FIG. 3 is a flowchart showing a control process executed by the body composition meter 1. FIG. 4 is a display example of the display screen of the body composition meter 1.

  As shown in FIG. 1, a body composition meter 1 is an improvement over a known body composition meter equipped with a so-called eight-electrode bioelectrical impedance measuring device comprising a hand electrode and a foot electrode. The main body 10 having a substantially L shape in side view, a plurality of electrodes 21, 22, 23, 24, 31, 32, 33, 34, 41, 42, 43, 44 attached to the main body 10, and the main body 10 And a control device (not shown) incorporated in the interior.

  The main body 10 includes a base 11 installed on the floor surface, a base 12 placed on the base 11, and an operation unit 13 disposed at the upper end of a column extending from the base 11 in the vertical direction. It consists of. The base 11 and the mounting base 12 are connected via a known load cell using a strain gauge electrically connected to the control device inside the main body 10, and the person to be measured has an upper surface 12 a of the mounting base 12. When standing, the load corresponding to the weight of the person to be measured is detected by the load cell and taken into the control device. On the other hand, the operation unit 13 is provided with a known liquid crystal screen 14 electrically connected to the control device inside the main body 10. This liquid crystal screen 14 has a so-called touch panel sensor function as well as a display of various data acquired by the body composition meter 1, and is also used for inputting personal data of the measurement subject. It is.

  The mounting table 12 has an upper surface 12 a made of an insulating material (resin), and metal electrodes 21, 22, 23, 24 for contacting the sole of the person to be measured are arranged on the upper surface 12 a. It is installed. These electrodes are electrically connected to the control device inside the main body 10, and more specifically, the electrode 21 and the electrode 22 are connected to a current supply unit included in the control device, and the electrode 23 and the electrode 24 Is connected to a voltage measuring unit included in the control device. Therefore, when the person to be measured stands on the upper surface 12a of the mounting table 12, the electrode 21 and the electrode 22 are brought into contact with the toe sides of the left and right soles, and electricity is applied between both feet, and the electrode 23 and the electrode 24 are respectively left and right. The potential difference between both feet is measured in contact with the heel side of the sole.

  That is, the electrodes 21 and 22 constitute a pair of electrode plate-type energizing electrodes for energizing between the two feet that are the two parts of the living body, and the electrodes 23 and 24 are for measuring the potential difference between the both feet that are the energizing current paths. A set of electrode plate type measurement electrodes is configured.

  The operation unit 13 is connected with electrodes 31, 32, 33, 34 for making contact with the palm of the measurement subject. These electrodes are formed by depositing (plating) a conductive material on the surfaces of handgrips 35 and 36 made of an insulating material (resin) formed in a shape and size suitable for holding with one hand. An electrode 31 and an electrode 33 are disposed on the surface of the hand grip 35, and an electrode 32 and an electrode 34 are disposed on the surface of the right hand hand grip 36, respectively. In FIG. 1, the electrodes 33 and 34 are located on the back surfaces of the hand grips 35 and 36 (see FIG. 2). Each of the hand grips 35 and 36 is connected to the operation unit 13 via electric cables 37 and 38 extending from one end thereof, and each of the electrodes 31, 32, 33 and 34 is connected to the electric cable 37, It is electrically connected to a control device inside the main body 10 through 38. More specifically, the electrode 31 and the electrode 32 are connected to a current supply unit included in the control device, and the electrode 33 and the electrode 34 are connected to a voltage measurement unit included in the control device. Therefore, when the person to be measured grips the hand grips 35 and 36 with the left and right hands, the electrode 31 and the electrode 32 are brought into contact with the fingertip sides of the left and right hands, and the electrodes 33 and 34 are energized. Is in contact with the palm side of the left and right hands, and the potential difference between the two hands is measured.

  That is, the electrodes 31 and 32 constitute a pair of electrode plate-type energizing electrodes for energizing between the two hands that are two parts of the living body, and the electrodes 33 and 34 are for measuring the potential difference between the two hands that are the energizing current paths. A set of electrode plate type measurement electrodes is configured.

  Furthermore, electrodes 41, 42, 43, and 44 are connected to the handgrips 35 and 36 for contacting any part of the body of the subject. These electrodes are seal-like electrodes using a conductive gel on the contact surface with the body, and the left hand grip 35 has an electrode 41 and an electrode 41 at the end opposite to the extending portion of the electric cable 37. The electrode 43 is connected to the right hand grip 36 via the electric cables 41a and 43a, and the electrode 42 and the electrode 44 are respectively connected to the right hand grip 36 at the end opposite to the extending portion of the electric cable 38. , 44a. That is, the electrodes 41 and 43 are electrically connected to the control device inside the main body 10 via the electric cables 41a and 43a and the electric cable 37, respectively. The electrodes 42 and 44 are respectively connected to the electric cables 42a and 44a and the electric cable 38. Is electrically connected to the control device inside the main body 10. More specifically, the electrode 41 and the electrode 42 are connected to a current supply unit included in the control device, and the electrode 43 and the electrode 44 are connected to a voltage measurement unit included in the control device. Therefore, when the electrode 41 and the electrode 42 are brought into contact with any two parts of the body, the two parts are energized. When the electrode 43 and the electrode 44 are brought into contact with any two parts in the energization path, the two parts are energized. The potential difference between them is measured.

  That is, the electrodes 41 and 42 constitute a pair of patch-type energizing electrodes for energizing between two parts of the living body, and the electrodes 43 and 44 are for measuring the potential difference between the two parts in the energizing current path. A set of pasting-type measurement electrodes is configured.

  On the other hand, in addition to the above-described current supply unit and voltage measurement unit, the control device incorporated in the main body 10 is for selectively switching the connection between these current supply unit and voltage measurement unit and each electrode. Based on the current value supplied to the body of the person to be measured through the energizing electrode selected by the switching unit and the switching unit and the potential difference measured through the measuring electrode selected by the switching unit, Based on the calculation unit for calculating bioelectrical impedance, the calculated bioelectrical impedance, and personal data such as the height, weight, sex, and age of the subject input from the liquid crystal screen 14 as a touch panel sensor ( Rate), visceral fat area, body water content (rate), muscle mass (rate), bone mass, basal metabolic rate, and the like.

  Here, the electrodes 41 and 42 as the pasting-type energization electrodes and the electrodes 43 and 44 as the pasting-type measurement electrodes are detachable from the main body 10. 2 shows the left hand grip 35 and the electrodes 41, 43. As shown in FIG. 2, the electric cable 41a for connecting the electrode 41 to the hand grip 35 is an end portion opposite to the electrode 41. The male pin connector 41b is detachable from the female connector hole 35a formed at the end of the hand grip 35. Similarly, in the electrode 43, the male pin connector 43b of the electric cable 43a is detachable from the female connector hole 35b of the hand grip 35. Although illustration is omitted, the right hand hand grip 36 and the electrode 42 (electric cable 42a) and the electrode 44 (electric cable 44a) are also detachable. As a result, if it is not necessary to perform a bioelectrical impedance measurement with high stability during normal times, and the subject does not have a particular disability in the extremity, the affixing The mold electrodes 41, 42, 43, and 44 are removed from the main body 10, and the body composition meter 1 can be used as a general eight-electrode body composition meter.

  FIG. 3 is a flowchart of control processing executed by the control device of the body composition meter 1. When the body composition meter 1 is turned on, the control device is initialized, and a process for confirming whether or not the pasted electrodes 41, 42, 43, 44 are connected to the main body 10 (hand grips 35, 36) is performed. Performed (step S1). This confirmation process may be an electrical process or an artificial process.

  When the paste-type electrodes 41, 42, 43, 44 are not connected, the control device measures the bioelectrical impedance using the electrode plate-type electrodes 21, 22, 23, 24, 31, 32, 33, 34. As the calculation of the body composition is performed, the input standby state is established (step S2). Thereafter, the person to be measured or the operation operator inputs personal data such as the gender, age, and height of the person to be measured from the liquid crystal screen 14 (step S3), and when the person to be measured stands on the upper surface 12a of the platform 12, the person to be measured The body weight is measured (step S4). Next, when the person to be measured grips the hand grips 35 and 36 in the left and right hands, bioelectrical impedance is measured (step S5).

  The measurement of bioelectrical impedance in step S5 is so-called impedance measurement for each part. That is, the electrodes 21 and 23 are in contact with the left foot of the measurement subject, the electrodes 22 and 24 are in contact with the right foot, the electrodes 31 and 33 are in contact with the left hand, and the electrodes 32 and 34 are in contact with the right hand. In this state, a switching unit included in the control device selectively switches connection between each electrode, the current supply unit, and the voltage measurement unit. For example, first, the electrode 21 and the electrode 22 are connected to the current supply unit and energized between both feet, and the electrode 23 and the electrode 33 are connected to the voltage measurement unit to measure the potential difference between the left foot and the left hand. Although the current conduction path is between both feet, the voltage measurement path is between the left limb and the potential difference actually measured is the potential difference between the tip of the left foot and the root. Accordingly, the impedance calculated by the calculation unit based on the current value at this time and the measured potential difference is the left foot impedance. Next, the switching unit connects the electrode 24 and the electrode 34 to the voltage measuring unit while measuring the potential difference between the right limb while maintaining the connection between the electrodes 21 and 22 (while energizing between the both feet). . The impedance calculated as a result is the right foot impedance. Next, the electrode 31 and the electrode 32 are connected to the current supply unit and energized between both hands, the electrode 23 and the electrode 33 are connected to the voltage measurement unit, and the potential difference between the left limbs is measured. Impedance is calculated. The impedance of the right hand is calculated by connecting the electrode 24 and the electrode 44 to the voltage measuring unit and measuring the potential difference between the right and left legs while maintaining energization between both hands. Finally, the switching unit connects the electrode 21 and the electrode 31 to the current supply unit and energizes the left limb, and connects the electrode 24 and the electrode 44 to the voltage measurement unit to thereby determine the potential difference between the right limb. Let me measure. The impedance calculated as a result is the trunk impedance where the energization path and the measurement path overlap. By calculating the impedance for each body part, the body composition described later can be calculated for each body part.For example, the part-by-part measurement itself is already known, and this Since it is not particularly related to the main part of the invention, further explanation will be omitted.

  The measurement of bioelectrical impedance in step S5 is so-called multi-frequency measurement. That is, a relatively low-frequency current and a relatively high-frequency current are switched and supplied to the body, impedance and phase difference are measured at each frequency, and extracellular fluid resistance and intracellular fluid resistance are calculated from the results. To do. Compared to bioelectrical impedance measured using a single-frequency current, measurement errors associated with moisture movement (diurnal variation) in the body are less likely to occur, and measurement accuracy is improved. Since it is already known and is not particularly related to the main part of the present invention, further explanation will be omitted.

  Substituting the gender, age, height, weight, and bioelectrical impedance (extracellular fluid resistance, intracellular fluid resistance) of each part input or measured in steps S3 to S5 into a predetermined regression equation Thus, the body composition for each part is calculated (step S6). Thereafter, these input, measured and calculated data are displayed on the liquid crystal screen 14 (step S7), and a series of measurement control is completed. The data output is not limited to the display on the liquid crystal screen 14, but may be a print output by a printer in addition to or instead of this.

  The above measurement control can be executed simply by inputting the personal data of the person to be measured, and then the person to be measured stands on the platform 12 and grasps the handgrips 35 and 36 with the left and right hands. Can do. However, it is difficult to completely avoid the occurrence of measurement errors due to the influence of contact impedance between the limbs and each electrode plate type electrode 21, 22, 23, 24, 31, 32, 33, 34. When electrical impedance measurement is required, it is desirable to use a paste-type electrode. In addition, it is desirable to use a stick-on type electrode even when there is an obstacle to standing on the platform 12 or gripping the handgrips 35 and 36, such as the person being measured has some obstacle in the limbs. In these cases, the adhesive electrodes 41, 42, 43, 44 can be connected to the ends of the handgrips 35, 36.

  In step S1 after the power is turned on, when the sticking type electrodes 41, 42, 43, 44 are connected to the main body 10 (hand grips 35, 36), the control device performs the sticking type electrodes 41, 42, 43, The bioelectrical impedance is measured and the body composition is calculated using 44, and the input standby state is established (step S11). A person to be measured or an operation operator inputs personal data such as the gender, age, and height of the person to be measured from the liquid crystal screen 14 (step S12), and when the person to be measured stands on the upper surface 12a of the platform 12, the weight of the person to be measured is determined. It is measured (step S13). The control process from step S11 to step S13 is the same as the control process from step S2 to step S4.

  Next, the control device instructs the measurement subject or the operating operator by displaying the body part to which the electrodes 41, 42, 43, 44 are to be attached on the liquid crystal screen 14 (step S14). Specifically, as shown in FIG. 4, three options “1. wrist-wrist”, “2. elbow-elbow”, and “3. shoulder-shoulder” are displayed on the liquid crystal screen 14 as “designation of affixing electrode position”. The In accordance with the display, the measurement subject or the operator first attaches the energization electrode 41 and the measurement electrode 43 to the left wrist of the measurement subject, and the energization electrode 42 and the measurement electrode 44 to the right wrist, respectively, and then the liquid crystal Select “1. Wrist-Wrist” on the screen 14 (touch the number in the figure). In response to such a selection input, the control device measures the bioelectrical impedance between the wrists of the measurement subject using the electrodes 41, 42, 43, and 44 (step S15). In other words, the control device and the liquid crystal screen 14 correspond to an application site indicating device that indicates a living body site to which each electrode is to be applied.

  Subsequently, the liquid crystal screen 14 displays a choice as to whether or not to continue the measurement of the bioelectrical impedance. When the measurement is continued according to the selection input of the measurement subject or the operation operator, the process returns to step S14. Advances to step S17. When the process returns to step S14, the electrodes 41, 42, 43, and 44 are attached to unselected positions (here, “2. elbow-elbow” or “3. shoulder-shoulder”), and options corresponding to this are selected. Will choose. It should be noted that the number of options is not limited to three, and it is naturally possible to prepare more options, and it is not necessary to select and measure all such options, and any part can be measured. Needless to say, whether or not to select is arbitrarily determined by the person being measured or the operator. Further, the measurement of the bioelectrical impedance in step S15 is a multi-frequency measurement as in the control process in step S5.

  Thereafter, the sex, age, height, weight, and bioelectrical impedance (extracellular fluid resistance, intracellular fluid resistance) for each part of the measurement subject input or measured in steps S12 to S15 are substituted into a predetermined regression equation. Thus, the body composition for each part is calculated (step S17). The calculation of the body composition is performed by substituting the bioelectric impedance for each part designated in step S14 into a regression equation corresponding to each part. Thereafter, the input, measurement, and calculated data are displayed on the liquid crystal screen 14 (step S18), and a series of measurement control is finished. The data output is not limited to the display on the liquid crystal screen 14, but may be a print output by a printer in addition to or instead of this.

  Since the above measurement control is performed using the adhesive electrodes 41, 42, 43, and 44, the influence of the contact impedance between the body part and the electrode is reduced, and the measurement of the bioelectrical impedance is stabilized. is there. Further, even a person to be measured who has an obstacle that cannot hold the hand grips 35 and 36 can measure bioelectrical impedance. In the control processing from step S11 to step S18, there is no difference from the control processing from step S2 to step S7 in that the person to be measured measures the weight by getting on the platform 12, but such weight is not changed. Of course, it is possible to input the weight as well as the gender, age, and height from the liquid crystal screen 14 in order to deal with a subject who cannot be measured. Furthermore, by using the metal plate-type electrodes 21, 22, 23, 24, 31, 32, 33, and 34 and the paste-type electrodes 41, 42, 43, and 44 at the same time, add any part to both hands and feet. It can also be used for bioelectrical impedance measurement for each segmented part.

  A preferred second embodiment of the present invention will be described with reference to the drawings. FIG. 5 is an external view of a body composition meter 1 ′ obtained by modifying a part of the body composition meter 1 shown in FIG. FIG. 6 is an external view of an electrode portion of the body composition meter 1 ′. The body composition meter 1 ′ has a handgrip having an electrode plate-type hand electrode that can be attached to and detached from the main body, so that a paste-type electrode and an electrode plate-type electrode can be exchanged. The points are different from the body composition meter 1 of FIG. 1, and the other points are the same as those of the body composition meter 1. Therefore, the same reference numerals are given to the same components, and the detailed description thereof is omitted.

  In FIG. 5, an electrical cable 37 ′ and an electrical cable 38 ′ extend from the main body 10, and connectors 37a ′ and 38a ′ are disposed at the ends of the electrical cables 37 ′ and 38 ′. The connector 37a ′ is connected with a paste-type energizing electrode 41 and a paste-type measurement electrode 43 via electric cables 41a and 43a, respectively. The connector 38a ′ is connected with the paste-type energizing electrode 42 and the paste-type measurement electrode. The electrodes 44 are connected to each other through electric cables 42a and 44a.

  FIG. 6 shows an electrical cable 37 ′ and electrodes 41 and 43. As shown in FIG. 6, female connector holes 37 b ′ and 37 c ′ are formed in the connector 37 a ′. 41, the male pin connector 41b of the electric cable 41a is detachable from the female connector hole 37b '. Similarly, in the electrode 43, the male pin connector 43b of the electric cable 43a is detachable from the female connector hole 37c ′ of the connector 37a ′. Although not shown, the connector 38 a ′ of the electric cable 38 ′ and the electrode 42 (electric cable 42 a) and the electrode 44 (electric cable 44 a) can be similarly attached and detached.

  In addition, a hand grip 35 ′ (electrode 31 is disposed on the back side in the drawing) in which metal plate-type electrodes 31 and 33 are disposed is attached to and detached from the connector 37 a ′ of the electric cable 37 ′. It is possible. At one end of the hand grip 35 ′, a connector 35 a ′ in which a male pin connector (not shown) electrically connected to the electrodes 31 and 33 is disposed is formed. On the other hand, the connector 37a 'of the electric cable 37' is detachable. Although illustration is omitted, a hand grip provided with a metal plate type electrode corresponding to the hand grip 35 ′ is also detachable from the electric cable 38 ′.

  As a result, if it is not necessary to perform a bioelectrical impedance measurement with high stability during normal times, and the subject does not have a particular disability in the extremity, the affixing The electrodes 41, 42, 43, and 44 of the mold are removed from the main body 10, and a handgrip having a metal plate type electrode is connected to the main body 10 instead. It can be used as a body composition meter. On the other hand, when highly stable bioelectrical impedance measurement is required, adhesive electrodes 41, 42, 43, and 44 can be used instead of the handgrip. In this manner, the metal plate type electrode and the sticking type electrode can be configured to be interchangeable.

  The present invention and the embodiments thereof have been described in detail above. However, the present invention is not limited to the above description, and is not limited to the above description, but is introduced together with the examples as long as the configuration described in the claims is provided. However, various modifications and applications are possible, such as increasing the number of pasted electrodes to enable more detailed measurement.

The external view of the body composition meter 1 which applied the bioelectrical impedance measuring apparatus by this invention. 1 is an external view of an electrode portion of body composition meter 1. FIG. 3 is a flowchart showing a control process executed by the body composition meter 1. The figure which shows the example of a display of the display screen of the body composition meter 1. FIG. 1 is an external view of a body composition meter 1 ′ obtained by deforming a part of the body composition meter 1. FIG. The external view of the electrode part of body composition meter 1 '.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1 'Body composition meter 10 Main body 11 Base 12 Mounting base 12a Upper surface 13 Operation part 14 Liquid crystal screen 21, 22, 23, 24 Electrode plate type electrode (foot electrode)
31, 32, 33, 34 Electrode plate type electrode (hand electrode)
35, 35 ', 36 Hand grip 35a, 35b Female connector hole 35a' Connector 37, 38, 37 ', 38' Electrical cable 37a ', 38a' Connector 37b ', 37c' Female connector hole 41, 42, 43, 44 Attached type electrode 41a, 42a, 43a, 44a Electric cable 41b, 43b Male pin connector

Claims (3)

Between at least one set of electrode plate type energizing electrodes for energizing between two parts of a living body, at least one set of electrode plate type measuring electrodes for measuring a potential difference in an energizing current path, and between two parts of the living body A living body based on at least one set of energizing electrodes for energizing the electrode, at least one set of measuring electrodes for measuring a potential difference in the energizing current path, and the energizing current value and the measured voltage value. A bioelectrical impedance measuring device comprising: a main body having an arithmetic device for calculating electrical impedance. The bioelectrical impedance measuring apparatus according to claim 1, wherein at least the pasting-type energizing electrode and the pasting-type measuring electrode are detachable from the main body. When the bioelectrical impedance is measured using the pasting-type energization electrode and the pasting-type measurement electrode, the pasting part indicating device is further provided for instructing a site of a living body to which each electrode is to be pasted. The bioelectric impedance is calculated based on the energization current value and the measured voltage value, and the body composition of the living body is calculated by substituting the calculated bioelectric impedance into a regression equation corresponding to the indicated region. The bioelectrical impedance measuring apparatus according to claim 1 or 2.

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