KR102324611B1 - Device for diagnosing edema - Google Patents

Abstract

Provided is an edema diagnosis device which simultaneously measures the perimeter and impedance of an edema site to perform precise diagnosis. According to the present invention, the edema diagnosis device comprises: an inner cylinder formed to be surrounded at a predetermined distance by the circumferential surface of a subject having a predetermined length; an electrode member installed on the inner circumferential surface of the inner cylinder; an outer cylinder disposed to surround the outer circumferential surface of the inner cylinder at an interval and disposed to rotate; a pair of light sources disposed on the inner circumferential surface of the outer cylinder and emitting a reference light toward the inner cylinder; and a pair of light receiving units disposed adjacent to the light source. Accordingly, a linear distance to each light receiving unit is detected by using the reference light emitted from each light source so that the distance between the outer cylinder and the subject is measured, and at the same time, the impedance of the subject is measured by using a current applied to the electrode member.

Description

DEVICE FOR DIAGNOSING EDEMA

The present invention relates to a device for diagnosing edema, and more particularly, to a device for diagnosing edema capable of accurate diagnosis by measuring the circumference of a limb and bioimpedance.

In general, edema is a symptom of swelling of the body, which develops due to disturbance of blood or lymph circulation in any part or all of the body.

In particular, among edema, lymphedema refers to a phenomenon in which a lymphatic vessel is damaged or blocked, lymph fluid accumulates under the skin, and the arm or leg swells. Therefore, lymphedema is an abnormal accumulation of extracellular fluid at the site of disease.

Lymphedema as described above is diagnosed by judging the degree of swelling of the body by measuring the circumference or volume of the arms and legs. For accurate diagnosis of edema, it can be determined by periodically measuring the same area at the same time, and can be diagnosed by comparing the swollen side with the non-swollen side.

Conventionally, edema is diagnosed by measuring the volume of the body. This method of diagnosing edema by measuring the volume of the body simply determines the degree of edema according to the measured volume of the arms and legs. There are cases, and if edema is progressing, but there is no change in the volume of the arm or leg due to muscle atrophy, there is a problem that may lead to inaccurate diagnosis of edema.

Laid-Open Patent Publication No. 10-2017-0129511, 2017.11.27. open

An object of the present invention is to provide an edema diagnosis apparatus capable of accurate diagnosis by simultaneously measuring the perimeter and impedance of the edema site.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

An apparatus for diagnosing edema according to an embodiment of the present invention for solving the above-described problems includes an inner cylinder for mounting a circumferential surface of a subject having a predetermined length, an electrode member formed on an inner circumferential surface of the inner cylinder, and an outer circumferential surface of the inner cylinder an outer cylinder disposed to be spaced apart from the outer cylinder and rotatably disposed, a pair of light sources disposed on an inner circumferential surface of the outer cylinder and irradiating a reference light toward the inner cylinder, and a pair of light receiving units disposed adjacent to the light source Including, using the reference light irradiated from each light source to detect the linear distance to each light receiving unit to measure the distance between the outer cylinder and the subject, and at the same time use the current applied to the electrode member Thus, the impedance of the subject can be measured.

A cross-sectional shape of the outer cylinder may include a circular orbital circle, and the light source may be disposed on the orbital circle, and may be disposed symmetrically with respect to a center point of the orbital circle.

The light receiving unit may be disposed on the orbit circle.

The maximum value obtained by subtracting the distance measured by the light source and the light receiving unit from the diameter of the outer cylinder is the major axis length, and the minimum value is the minor axis length and substituting it into the approximation formula of the ellipse circumference to calculate the circumference of the subject can

A plurality of orbital circles disposed in parallel to a different position from the orbital circle along the axial direction of the outer cylinder and each having another light source and a light receiving unit may be further included.

The electrode member may be disposed on the orbital circle of the inner cylinder with reference to a center point other than the center point of each of the plurality of orbital circles.

A plurality of image pickup members are provided on the inner circumferential surface of the inner cylinder other than where the light source and the light receiver are disposed, and the external information of the subject may be input by using the image pickup member.

The inner cylinder may be made of transparent acrylic.

A driving motor for driving the rotation of the outer cylinder may be further included.

The electrode member may be coated with a conductive material in a ring shape along an inner circumferential surface of the inner cylinder.

The electrode member may be continuously formed in a ring shape along the inner circumferential surface of the inner cylinder to measure the impedance for each section.

The edema diagnosis apparatus may simultaneously measure the circumference and impedance of the subject for diagnosing lymphedema.

Other specific details of the invention are included in the detailed description and drawings.

According to the apparatus for diagnosing edema according to an embodiment of the present invention, it is possible to simultaneously measure the circumference of a limb and precisely measure the bioimpedance for determining the composition of a body material.

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 illustrates a state in which an edema diagnosis apparatus according to an embodiment of the present invention is worn on a subject.
2 shows a cross section of a subject.
3 is a view showing a state in which the edema diagnosis apparatus according to an embodiment of the present invention is mounted to measure the circumference and impedance of a subject in a plurality of orbital sources.
4 schematically shows a cross-section of an edema diagnosis apparatus according to an embodiment of the present invention.
FIG. 5 schematically illustrates a principle of measuring a distance using the light source and the light receiving unit of FIG. 4 .

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and those of ordinary skill in the art to which the present invention pertains. It is provided to fully understand the scope of the present invention to those skilled in the art, and the present invention is only defined by the scope of the claims.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. As used herein, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, “comprises” and/or “comprising” does not exclude the presence or addition of one or more other components in addition to the stated components. Like reference numerals refer to like elements throughout, and "and/or" includes each and every combination of one or more of the recited elements. Although "first", "second", etc. are used to describe various elements, these elements are not limited by these terms, of course. These terms are only used to distinguish one component from another. Accordingly, it goes without saying that the first component mentioned below may be the second component within the spirit of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used herein will have the meaning commonly understood by those of ordinary skill in the art to which this invention belongs. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless specifically defined explicitly.

Spatially relative terms "below", "beneath", "lower", "above", "upper", etc. It can be used to easily describe the correlation between a component and other components. A spatially relative term should be understood as a term that includes different directions of components during use or operation in addition to the directions shown in the drawings. For example, when a component shown in the drawing is turned over, a component described as “beneath” or “beneath” of another component may be placed “above” of the other component. can Accordingly, the exemplary term “below” may include both directions below and above. Components may also be oriented in other orientations, and thus spatially relative terms may be interpreted according to orientation.

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

1 shows a state in which an edema diagnosis apparatus according to an embodiment of the present invention is worn on a subject, FIG. 2 shows a cross-section of the subject, and FIG. 3 is an edema diagnosis apparatus according to an embodiment of the present invention. shows a mounted state to measure the circumference and impedance of the subject in a plurality of orbital circles of It schematically shows the principle of measuring the distance using the light source and the light receiving unit of

1 to 5 , the edema diagnosis apparatus according to an embodiment of the present invention may include an inner cylinder 100 , an electrode member 110 , an outer cylinder 200 , a light source 210 , and a light receiving unit 220 . can

The inner cylinder 100 may be formed to be surrounded by a predetermined distance from the circumferential surface of the subject 1 of the subject. Here, the subject 1 of the subject may be any one of the extremities. In other words, it may refer to either the arm or the leg of the subject.

The shape of any one of the arm or the leg of the examinee may be viewed as a form of dividing a cross section of a predetermined unit into a plurality of units along the length direction. That is, as shown in FIG. 2 , the cross-sectional shape of the subject 1 may be approximately elliptical, and the inner cylinder 100 may be located in any one of successive entities having such a cross-sectional shape.

Since the major axis length d1 of the subject 1 is longer than the minor axis length d2, as will be described later, one of the outer cylinders 200 measured along the circumference of the major axis length d1 of the subject 1 The measurement distance using the pair of light sources 210 and the pair of light receiving units 220 is shown as a relatively small value, and the light source 210 and light receiving unit 220 of the outer cylinder 200 measured along the periphery of the minor axis length d2. The measurement distance using , appears as a relatively large value.

As described above, the elliptical shape of the subject 1 may be estimated according to the long axis side measurement distance or the short axis side measurement distance measured from each of the light sources 210 and the light receiving unit 220 .

The electrode member 110 formed on the inner circumferential surface of the inner cylinder 100 may include a conductive material. Here, the electrode member 110 may be formed of a separate material having conductivity, but the inner circumferential surface of the inner cylinder 100 may be coated with a conductive material, and thus the present invention is not limited thereto.

The electrode member 110 receives current while in contact with the subject 1 to measure the impedance of the subject 1 . A process of measuring the impedance of the subject 1 using the electrode member 110 will be described later.

The outer cylinder 200 may be rotatably disposed around the cross-sectional shape of any one point of the subject 1 and may be rotatably formed with respect to the center of any one of the cross-sections of the subject 1 . At this time, as shown in FIG. 3 , the cross-sectional shape of the outer cylinder 200 may be formed in a circular shape including the orbital circle G1 having a circular shape.

As shown in FIG. 4 , a separate driving motor M for providing a driving source so that the outer cylinder 200 can be rotated may be provided. At this time, at least one driving motor M may be provided to provide rotational force to the outer circumferential surface of the outer cylinder 200 through various coupling means such as gear coupling or a tension belt.

As shown in FIG. 5 , the light source 210 may generate a reference light p for measuring the distance of an object. A laser may be used as the reference light (p), and the laser distance measurement technology uses a laser to generate a laser at a place where the laser is generated, and then receives the wavelength of the laser returning from the target from the light receiving unit 220 to obtain the incident angle and the reflection angle. The distance to the target can be measured.

The light source 210 is divided into solid laser (Nd:YAG, ruby, Nd:Glass, semiconductor, etc.), liquid laser (Dye), gas laser (carbon dioxide, excimer, argon, helium neon), etc., depending on the oscillation source, For each oscillation method, if the laser oscillation duration is 0.25 seconds or more, continuous (CW) lasers, and if less than 0.25 seconds, pulse lasers and Q-switched pulse lasers can be applied.

In addition, the following method may be used for distance measurement using a laser.

Pulsed TOF (time of flight) measures the round trip time of a representative pulse, phase shift measures the distance through the phase difference of the signal, and frequency modulation extracts distance information through the frequency difference after changing the frequency A frequency modulated continuous wave (FMCW) technique, etc. may be used. In particular, the TOF method measures the distance by measuring the time at which the laser emits a pulse signal and the reflected pulse signals from objects within the measurement range arrive at the receiver.

In the present embodiment, a method of measuring a distance using the oscillation source irradiated from the light source 210 or the reflected light of the oscillation source may be applied in various ways, and thus is not specific to any one.

A collimation lens (not shown) may be disposed on the front surface of the light source 210 to make the reference light p irradiated from the light source 210 parallel. By inducing the reference light p passing through the collimation lens to move in parallel along a linear axis in a narrow range, the precision of the measurement value can be improved.

Again, looking at the electrode member 110 , the electrode member 110 is a means for applying a current by being in contact with any part of a limb, and is electrically connected to a separate electric circuit from the outside to receive a current. That is, the electric circuit applies a current into the body through the electrode member 110 . In this case, the electrode member 110 is disposed at at least two places on a plurality of orbital circles based on a central point other than the orbital circle G1 of the outer cylinder 200 in which the light source 210 and the light receiving unit 220 are disposed, respectively. In this case, currents having positive and negative polarities may be applied to each of the electrode members 110 .

The shape of fixing the contacting electrode member 110 is preferably designed so that there is no interference with each other by using a material having a low absorption of a region spectrum used for optical detection. That is, the optical measurement area and the electrode measurement area are located in several devices at regular intervals, and information for each section can be obtained.

As described above, the impedance of the subject can be measured using the application of current between the pair of electrode members 110 .

Although various methods can be applied to impedance measurement, in particular, bioelectric impedance measurements (BIM) is a representative term referring to various existing and new non-invasive procedures and technologies using electric current.

When the electric vibration generated from the electrode member 110 having one conductivity is generated, a small amount of current is activated and sensed through the electrode member 110 having the other conductivity.

When such currents pass and pass rapidly through physiological parts of the body with various characteristics, a voltage drop occurs. Currents acquire impedances or resistances inherent in body fluids and tissues that pass through cellular spaces, lymphatic systems, and regions of varying characteristics in the bloodstream. This voltage drop provides indirect information about the physical properties of the part through which the current is passed.

For example, when the electrode member 110 including the conductivity is provided as a pair adjacent to each other so as to be spaced apart by a predetermined distance on any one orbital circle, a current of a certain magnitude (eg, 50 kHz, 800 mA) is applied to the human body therebetween. It is applied through , and the bioimpedance can be measured.

Orbital circles G2 and G3 disposed at positions different from the orbital circle G1 along the longitudinal direction of the outer cylinder 200 may be disposed. Here, the electrode member 110 may be respectively disposed on the orbital circle of the inner cylinder 100 based on a central point other than the plurality of orbital circles G1, G2, and G3, and the conductivity disposed along each orbital circle The electrode member 110 made of a material allows current to be applied thereto. In addition, although three orbital circles G1, G2, and G3 are shown in this embodiment, it goes without saying that four or more orbital circles may be arranged along the longitudinal direction of the subject 1 .

Each electrode member 110 may be formed in at least a ring shape, and may be positioned in at least two orbital circles along the longitudinal direction of the subject 1 . Here, when the electrode member 110 is formed in at least two orbital circles along the longitudinal direction of the subject 1, the impedance can be measured by applying the polarity current of the positive electrode and the polarity current of the negative electrode, but the electrode member is located in three or more places. When 110 is installed, it is possible not only to measure the area between any one electrode member and the other electrode member, but also to measure the area between any one electrode and another electrode member. An electrode member may be installed.

In this case, the electrode member 110 is preferably disposed on the orbital circle of the inner cylinder 100 centered on a central point other than the plurality of orbital circles G1 , G2 , and G3 of the outer cylinder 200 . As will be described later, as the light source 210 and the light receiving unit 220 are rotated, the light source 210 irradiates the reference light p and the light receiving unit 220 detects the reflected light p ′. This is to prevent interference. In other words, the electrode member 110 may be respectively disposed between the plurality of orbital circles G1 , G2 , and G3 of the outer cylinder 200 in the longitudinal direction of the subject 1 . However, the electrode member 110 may be located on any orbital circle of the inner cylinder 100 within a range that is not located on the orbital circle based on the center point of each of the plurality of orbital circles G1, G2, and G3. Therefore, the formation position of the electrode member 110 is not limited thereto.

As a driving source of the outer cylinder 200 , a separate driving motor M may be included. The driving motor provides an external force capable of rotating the outer cylinder 200, and a user in the vicinity may rotate the outer cylinder 200 by directly providing a rotational force by hand, but is used as a structure of a large size for clinical use. In this case, the outer cylinder 200 may be rotated by operating the driving motor M.

Meanwhile, a plurality of imaging members 230 may be provided on the inner circumferential surface of the outer cylinder 200 in areas other than the pair of light sources 210 and the pair of light receiving units 220 . The imaging member 230 may receive external shape information of the subject 1 . For this reason, the external shape of the subject 1 can be restored and output in a three-dimensional shape.

In this case, in order to acquire image information of the subject 1 from the imaging member 230 , the inner cylinder 100 is preferably formed of a transparent material. In particular, the inner cylinder 100 may be made of a transparent acrylic material. For example, when a light source having a wavelength between 500 nm and 1100 nm is used, the transmittance is at least 80% or more within a range of 2 mm to 4 mm that does not interfere with this. Thick transparent acrylic may be used.

Hereinafter, the operation of the edema diagnosis apparatus according to an embodiment of the present invention will be described.

In order to operate the edema diagnosis apparatus according to an embodiment of the present invention, biometric information (extremity circumference, tissue hardness, bioimpedance) is measured.

At least when the circumference of each of the plurality of orbital circles G1, G2, and G3 of the subject 1 is measured, the circumference of both upper limbs or both lower limbs from the average value of the measured values of the plurality of orbital sources G1, G2, G3 If the difference is more than 1 cm each, lymphedema can be suspected.

That is, as a diagnostic method, the diagnosis may be performed based on the patient's history and clinical examination. Because changes in volume or tissue are the basics, by measuring the circumference of the limbs, if the difference between the circumferences of the limbs is 1 cm or more, it is diagnosed as mild or more lymphedema.

Non-invasive diagnostic tests such as Lymphoscintigraphy to investigate the regeneration and current functional status of the lymphatic system can be of great help in not only the diagnosis, but also the judgment of treatment results and future prognosis.

In the diagnosis of lymphedema, it is important to exclude congenital vascular malformations, venous diseases, malignant diseases, and systemic diseases, and if necessary, computed tomography, magnetic resonance imaging, ultrasonography, and lymphangiography are performed.

Also, when the difference in impedance between both sides in the average of the measured values measured from the three electrode members 110 is 3σ or more, lymphedema may be suspected.

Referring back to FIG. 3, the user's bio-information is measured, and the microcurrent detected from each electrode member 110 can be amplified through the amplification device 300, and the amplified signal is subjected to a band-pass filter ( 310), noise can be removed.

The amplified signal from which noise has been removed by the band filter 310 may be transmitted to the database 330 of a medical institution after the impedance measurement analyzer 320 performs the analysis as described above.

Medical institutions can diagnose lymphedema prognosis based on the bioinformation data transmitted with the consent of the patient, confirm the prognosis of lymphedema, and determine the treatment method to be followed by follow-up.

Referring to FIG. 5 together with FIG. 4 , looking at the distance measurement using a pair of light sources 210 and a pair of light receiving units 220 , the outer cylinder 200 is moved counterclockwise in the drawing by using the driving motor M. While rotating to , the reference light p is irradiated toward the subject 1 of the patient, and the subject 1 is irradiated from the diameter of the outer cylinder 200 using the angle of the reflected light p' reflected from the subject 1 . Measure the distance between the outer surfaces of (1).

At this time, the light source 210 and the light receiving unit 220 are arranged at intervals of approximately 180° to each other to face the center point C of the outer cylinder 200 so as to be symmetrical with respect to the center point C of the outer cylinder 200. , 2 light sources 210 may be disposed.

In the above process, the reference light p is irradiated from the light source 210 and the time for the reflected light p' reflected from the outer surface of the subject 1 to return to the light receiving unit 220 is a minute value, so the θ value is will converge to 0.

That is, according to [Equation 1], as the distance of the reference light p converges to 1, the path of the reference light p and the path of the reflected light p' converge to coincide with each other. _{) The distance (h 1} or h ₂ ) between the outer cylinder 200 from the outer surface may be continuously measured.

Here, according to [Equation 2], if the sum (h ₁ +h ₂ ) of the distance measured in the rotation process of the outer cylinder 200 is subtracted from _{the diameter (l c ) of the outer cylinder 200, the} Continuous diameter values can be obtained. At this time, the maximum value of the obtained diameter values is taken as the major axis, and the minimum value is set as the minor axis. circumference can be estimated.

However, when θ to 0,

p≒p'≒h

(Here, h is the distance between the light source and the subject, l _b is the cross-sectional diameter of the subject, p is the reference light irradiated from the light source, and p' is the reflected light reflected from the subject.)

(Here, l _b is the cross-sectional diameter of the subject, l _c is the diameter of the outer cylinder, h ₁ is the first light source irradiation path, and h ₂ is the second light source irradiation path.)

(Here, α is the largest diameter among the measured diameters, β is the smallest diameter among the measured diameters, and P is an approximate solution of the circumference of the subject.)

The rotation of the outer cylinder 200 can obtain information about the entire limb in one rotation by the driving motor M.

When the subject 1 is mounted inside the inner cylinder 100 , the resistance to the current applied to the electrode member 110 in a state in contact with the electrode member 110 is detected from the subject 1 , respectively. By acquiring information about each section for each orbit circle (G1, G2, G3) of , it is possible to measure the impedance for each section.

However, when measuring the bioimpedance for each part by measuring the electrical resistance according to the flow of current applied through the electrode member 110 in the body, it is preferable to measure the bioimpedance using multiple frequencies, and according to the size of the frequency The bioimpedance may be measured according to the differently measured resistance values.

In addition, the body composition may be analyzed according to the bioimpedance measurement value. That is, by analyzing the current flow in the body according to each frequency, the total amount of water, the amount of extracellular fluid, the amount of intracellular fluid, and the amount of fat for each part of the body are analyzed.

The total amount of water in the body may be determined, and the total amount of water in the body may be determined based on the resistance value measured based on the amount of current corresponding to the frequency for determining the amount of water.

As described above for the bioimpedance measurement method, the impedance may be measured using the electrode member 110 used to measure the circumference of the subject 1 .

It is measured simultaneously when measuring the circumference of the subject 1, and similarly, each section (for example, a measurement value between any one orbital circle G1 and the other one orbital circle G2, the one orbital circle G1 ) and another orbital source (G3) or the measured value between the other orbital circle (G2) and the another orbital circle (G3)) can

Therefore, the apparatus for diagnosing edema according to an embodiment of the present invention measures the patient's bioinformation by dividing the upper and lower extremities, and simultaneously collects these data to precisely determine whether lymphedema is present and the degree of progression through complex diagnostic criteria.

In addition, the measurement of the circumference of the subject 1 through light source irradiation through the light source 210 and the imaging member 230 rotating around the subject 1 and the volume measurement using the imaging member 230 can be simultaneously performed. can

Based on this information, as a diagnostic criterion for diagnosing lymphedema, if there is a difference of 1 cm or more between the normal and abnormal regions in circumference, it is diagnosed as suspected of lymphedema of mild or higher, and the tissue hardness and bioimpedance through the pressure sensor are normal values. A difference of 3 standard deviations or more can be diagnosed as suspected lymphedema.

Therefore, according to the apparatus for diagnosing edema according to an embodiment of the present invention, it is possible to simultaneously measure the circumference of the subject and measure the bioimpedance for identifying the body material composition.

As mentioned above, although embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can realize that the present invention can be embodied in other specific forms without changing its technical spirit or essential features. you will be able to understand Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

100: inner cylinder
110: electrode member
200: outer cylinder
210: light source
220: light receiving unit
230: imaging member
G1, G2, G3: multiple orbital circles

Claims (12)

an inner cylinder mounted on a circumferential surface of a subject having a predetermined length;
an electrode member formed on an inner circumferential surface of the inner cylinder;
an outer cylinder disposed to be spaced apart from the outer circumferential surface of the inner cylinder and wrapped around the inner cylinder, the outer cylinder being rotatably disposed;
a pair of light sources disposed on the inner circumferential surface of the outer cylinder and irradiating a reference light toward the inner cylinder; and
A pair of light receiving units disposed adjacent to the light source,
The distance between the outer cylinder and the subject is measured by detecting a linear distance to each light receiving unit using the reference light irradiated from each light source, and at the same time, the subject is measured using a current applied to the electrode member. Measuring the impedance of the edema diagnostic device. According to claim 1,
The cross-sectional shape of the outer cylinder includes a circular orbital circle, the light source is disposed on the orbital circle, and is disposed symmetrically with respect to the center point of the orbital circle, edema diagnosis apparatus. 3. The method of claim 2,
The light receiving unit is disposed on the orbit circle, edema diagnosis device. 4. The method of claim 3,
The maximum value obtained by subtracting the distance measured by the light source and the light receiving unit from the diameter of the outer cylinder is the major axis length, and the minimum value is the minor axis length and substituting it into the approximation formula of the ellipse circumference to calculate the circumference of the subject , edema diagnostic device. 5. The method of claim 4,
A plurality of orbital circles arranged in parallel to a different position from the orbital circle along the axial direction of the outer cylinder, and each having another light source and a light receiving unit, are further included, edema diagnosis apparatus. 6. The method of claim 5,
and the electrode member is disposed on an orbital circle of the inner cylinder with reference to a central point other than the central point of each of the plurality of orbital circles. According to claim 1,
A plurality of imaging members are provided on the inner circumferential surface of the outer cylinder other than where the light source and the light receiving unit are disposed, and the external shape information of the subject is received by using the imaging member. 8. The method of claim 7,
The inner cylinder is a transparent acrylic material, edema diagnosis device. According to claim 1,
A driving motor for driving the rotation of the outer cylinder is further included, the edema diagnosis device. According to claim 1,
The electrode member is coated with a conductive material in a ring shape along the inner circumferential surface of the inner cylinder, edema diagnosis device. According to claim 1,
The electrode member is continuously formed in a ring shape along the inner circumferential surface of the inner cylinder to measure the impedance for each section, edema diagnosis apparatus. The apparatus for diagnosing edema of claim 1, for diagnosing lymphedema by simultaneously measuring the circumference and impedance of the subject.

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