CN111938639A - Device for detecting injury degree and range of organism soft tissue based on electrical impedance method - Google Patents

Abstract

The invention discloses a device for detecting the degree and scope of soft tissue damage in a body based on an electrical impedance method, which solves the technical problems that the prior art lacks effective means for rapid detection of subcutaneous soft tissue damage and has the possibility of misdiagnosis and missed diagnosis. The device of the present invention includes a conductivity meter, at least two measuring electrodes, connecting wires and a grid electrode plate. The grid electrode plate is a hollow structure, and each side of the grid electrode plate is respectively provided with a plurality of electrodes for placing the measuring electrodes. Mesh, the measuring electrode is placed in the mesh and is attached to the skin to be tested, the measuring electrode is connected with the conductivity meter through the connecting wire, and the conductivity between the two measuring electrodes is detected by the conductivity meter. The device of the invention can measure the electrical conductivity between different positions on the skin area, provides a digital basis for determining the damage degree and scope of the soft tissue of the body, reduces the influence of the doctor's subjective judgment on the result, and can improve the accuracy of the detection result.

Description

A device for detecting the degree and scope of soft tissue damage in the body based on electrical impedance method

technical field

The invention relates to the technical field of clinical medical diagnosis and detection equipment, in particular to a device for detecting the degree and scope of damage to soft tissue of a body based on an electrical impedance method.

Background technique

Soft tissue injury refers to the human body's muscles, fascia, tendons, ligaments, tendon sheaths, bursae, blood vessels, nerves and other tissues. These tissues are suddenly hit, pulled, twisted, compressed by gravity, or local bacterial infection caused by trauma, and the damage caused is soft tissue damage. Microcirculation disturbance and inflammation occur after soft tissue trauma, resulting in local skin tissue redness, swelling, heat, pain and dysfunction. At present, the commonly used clinical methods to check the scope and severity of local soft tissue injury are based on clinical symptoms. The following three aspects are mainly observed:

(1) Local examination: Find the lesion site based on the symptoms of local skin redness, swelling, heat and pain and skin surface damage, and roughly judge the estimated lesion range according to sensory examination (inspection and palpation).

(2) Inquiry of medical history: inquire about the onset time, location, process, cause of trauma, self-perception, etc.

(3) General examination: observe whether there is fever, changes in heart rate, mental state, etc.

Although the degree and scope of soft tissue damage can be detected by the above methods, the detection results mainly depend on the clinical judgment of doctors and lack a unified standard. For the same symptoms, the conclusions drawn by different doctors may be different, and there may be errors.

Because the electrical conductivity of biological tissue cells is related to various ion concentrations in the tissue, the amount of protein, the water content of the tissue, the integrity of the tissue cells, and the temperature. In normal tissue, the above factors are relatively constant, so the conductivity is relatively constant, or varies little. If the local tissue cells are damaged due to factors such as trauma and inflammation, the above-mentioned internal environment will be changed. Among them, the change of ion concentration has the greatest impact. The distribution of various ion concentrations in the intracellular fluid and extracellular fluid of normal tissues is relatively constant. Mobility is limited by the cell membrane. The normal conductivity mainly reflects the ions in the extracellular fluid. If the cell integrity is damaged by trauma and inflammation, the intracellular fluid flows out, resulting in an increase in the electrical conductivity of the local tissue, that is, the electrical impedance tends to decrease. The heavier the damage, the more cell damage. , the more the intracellular fluid flows out, the more obvious the tendency of electrical impedance to decrease. Therefore, the damage site range and damage degree can be judged based on the change trend of the electrical impedance of the tissue.

However, there is a lack of corresponding devices in the prior art. Therefore, there is an urgent need to provide a device for detecting the degree and scope of soft tissue damage in the body based on the electrical impedance method.

SUMMARY OF THE INVENTION

One of the purposes of the present invention is to propose a device for detecting the degree and scope of soft tissue damage in the body based on electrical impedance method, which solves the problem in the prior art that clinicians can only judge the degree and scope of damage based on observation and palpation of the patient's soft tissue, and can detect the damage degree and scope of the subcutaneous soft tissue. There is no effective means for rapid detection of damage, and there is a technical problem of the possibility of misdiagnosis and missed diagnosis. The technical effects that can be produced by the preferred technical solutions of the present invention are described in detail below.

For achieving the above object, the invention provides the following technical solutions:

The device of the present invention for detecting the degree and scope of soft tissue damage in the body based on the electrical impedance method includes a conductivity meter, at least two measuring electrodes, a connecting wire and a grid electrode plate, wherein the grid electrode plate is a hollow structure, and the grid electrode plate is a hollow structure. Each side of the grid electrode plate is provided with a plurality of mesh holes for placing measuring electrodes, the measuring electrodes are placed in the mesh holes and are attached to the skin to be detected, and the measuring electrodes are connected through the connecting wire. It is connected with the conductivity meter, and the conductivity between the two measuring electrodes is detected by the conductivity meter.

According to a preferred embodiment, the number of the measuring electrodes is two.

According to a preferred embodiment, the number of the measurement electrodes is N, N is an even number greater than or equal to 4, the N measurement electrodes are equally divided into N/2 groups, and the device further includes a measurement electrode line switch, The measurement electrodes are connected to the conductivity meter through the measurement electrode line changeover switch, and the working state of each group of the measurement electrodes is switched through the measurement electrode line changeover switch.

According to a preferred embodiment, the measuring electrode is a circular structure, and the diameter of the measuring electrode is 6-15 mm; a conductive paste layer is provided on the side of the measuring electrode that is attached to the skin to be detected.

According to a preferred embodiment, the grid electrode plate is made of a bendable material, so that the grid electrode plate is placed on the skin to be tested and can fit with the skin to be tested.

According to a preferred embodiment, the mesh holes on the grid electrode plate are of a square structure, and the side length of the mesh holes is equivalent to the diameter of the measuring electrodes, so that the measuring electrodes are placed in the mesh holes Afterwards, the measuring electrode can be fixed and the center of the measuring electrode and the center of the mesh are coincident with each other.

According to a preferred embodiment, the distance between the centers of two adjacent mesh holes on the grid electrode plate is equal, and the distance between the centers of two adjacent mesh holes is 0.5-2 cm.

According to a preferred embodiment, the size of the grid electrode plate is 2-6 cm larger than the estimated edge of the trauma lesion.

According to a preferred embodiment, the grid electrode plate has a square structure, and the size of the grid electrode plate is 9-15cm*9-15cm.

According to a preferred embodiment, the device for detecting the degree and extent of soft tissue damage in the body based on the electrical impedance method further comprises a data processor, the data processor is connected to the conductivity meter, and the conductivity meter detects the The data is sent to the data processor, so that the data detected by the conductivity meter can be analyzed and processed by the data processor.

The device for detecting the degree and scope of soft tissue damage in the body based on the electrical impedance method provided by the present invention has at least the following beneficial technical effects:

The device of the present invention for detecting the degree and range of soft tissue damage in the body based on the electrical impedance method includes a conductivity meter, at least two measuring electrodes, a connecting wire and a grid electrode plate, wherein the grid electrode plate is a hollow structure, and each of the grid electrode plates has a hollow structure. There are a plurality of mesh holes for placing the measuring electrodes on the sides. The measuring electrodes are placed in the mesh holes and fit with the skin to be tested. The measuring electrodes are connected with the conductivity meter through the connecting wire, and the conductivity meter detects The electrical conductivity between the two measuring electrodes, that is, through the device of the present invention, the electrical conductivity between the two measuring electrodes can be measured, and based on the measured electrical conductivity between different positions on the skin area, it can be determined. The degree and scope of soft tissue damage in the body provide a numerical basis, so that doctors have a fixed standard for judging the degree and scope of soft tissue damage in the body, reducing the influence of doctors’ subjective judgment on the results. For the same symptoms, different doctors based on measurement data. The conclusions should be consistent, greatly improving the accuracy of the test results.

That is to say, the present invention detects the electrical conductivity between different positions on the skin domain through a device based on the electrical impedance method for detecting the damage degree and range of the soft tissue of the body, which solves the problem that in the prior art, the clinician can only judge the degree of damage and palpation of the soft tissue of the patient. There is a lack of effective means for rapid detection of subcutaneous soft tissue injury, and there is a technical problem of the possibility of misdiagnosis and missed diagnosis.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a block diagram of a preferred embodiment of the device for detecting the degree and scope of soft tissue damage in the body based on the electrical impedance method of the present invention;

FIG. 2 is a schematic diagram of a preferred embodiment of a grid electrode plate for determining measurement points.

In the figure: 1. Conductivity meter; 11. Temperature compensation sensor; 2. Measuring electrode; 3. Connecting wire; 4. Grid electrode plate; 41. Mesh; 5. Measuring electrode wire switch; 6. Data processor .

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The device for detecting the degree and scope of soft tissue damage in the body based on the electrical impedance method of the present invention will be described in detail below with reference to Figures 1 and 2 and Embodiments 1 and 2 of the description.

Conductivity is the ability of an object to conduct current. A certain sine wave potential is applied to the two measuring electrodes 2 to measure the current flowing between the electrodes 2. According to Ohm's law, conductivity G is the reciprocal of resistivity R, ie G=1/R. The larger the conductivity value, the smaller the resistance value. The preferred technical solution of this embodiment is based on a device for detecting the degree and range of soft tissue damage in the body based on the electrical impedance method. The electrical conductivity between the two measuring electrodes 2 can be measured by the electrical conductivity meter 1. The greater the electrical conductivity, the smaller the resistance value, indicating that The more severe the skin damage.

Example 1

In this embodiment, the apparatus for detecting the degree and scope of soft tissue damage in the body based on the electrical impedance method of the present invention is described in detail with reference to FIGS. 1 and 2 .

The apparatus for detecting the degree and scope of soft tissue damage in the body based on the electrical impedance method in this embodiment includes a conductivity meter 1 , at least two measuring electrodes 2 , a connecting wire 3 and a grid electrode plate 4 , as shown in FIG. 1 . Among them, the grid electrode plate 4 is a hollow structure, and each side of the grid electrode plate 4 is respectively provided with a plurality of mesh holes 41 for placing the measuring electrodes 2. The measuring electrodes 2 are placed in the mesh holes 41 and are connected to the The skin is attached, the measuring electrode 2 is connected to the conductivity meter 1 through the connecting wire 3, and the conductivity between the two measuring electrodes 2 is detected by the conductivity meter 1, as shown in Figure 1 or 2. For example, the measuring electrodes 2 are similar to those used for electrocardiography. The conductivity meter 1 can also be said to be an impedance meter, which is connected to the measuring electrode 2 and used as a detection AC signal source. The conductivity meter 1 is, for example, a conductivity meter DDS-309 type.

Preferably, the conductivity meter 1 also has a temperature compensation sensor 11 . Since changes in ambient temperature will affect the measurement accuracy of the instrument, temperature compensation can eliminate or reduce the impact of temperature changes on the test results.

This embodiment is based on a device for detecting the degree and scope of soft tissue damage in the body based on the electrical impedance method. The electrical conductivity between the two measuring electrodes 2 can be measured. Based on the measured electrical conductivity between different positions on the skin region, the electrical conductivity can be It provides a numerical basis for determining the degree and scope of soft tissue damage in the body, so that doctors have a fixed standard for judging the degree and scope of soft tissue damage in the body, reducing the influence of doctors' subjective judgment on the results. For the same symptoms, different doctors based on measurement data. The conclusions should be consistent, greatly improving the accuracy of the detection results.

That is, in this embodiment, the electrical conductivity between different positions on the skin domain is detected by the device for detecting the damage degree and range of the soft tissue of the body based on the electrical impedance method, which solves the problem that in the prior art, the clinician can only judge the damage degree by observing and palpating the soft tissue of the patient. There is a lack of effective means for rapid detection of subcutaneous soft tissue injury, and there is a technical problem of the possibility of misdiagnosis and missed diagnosis.

As shown in FIG. 2 , the grid electrode plate 4 is a hollow structure, that is, the middle part of the grid electrode plate 4 is hollow (the part with the dotted line is actually not there. For ease of understanding, it is supplemented in the form of a dotted line in the figure). ), only a row of mesh holes 41 are respectively arranged on each side of the grid electrode plate 4 to prevent the middle part of the grid electrode plate 4 from pressing against the wound site and causing discomfort to the patient.

According to a preferred embodiment, the number of measuring electrodes 2 is two. Two measuring electrodes 2 are placed at different meshes 41 on the grid electrode plate 4 to detect the electrical conductivity between two points on the skin.

According to a preferred embodiment, the number of measurement electrodes 2 is N, N is an even number greater than or equal to 4, the N measurement electrodes 2 are equally divided into N/2 groups, and the device further includes a measurement electrode line switch 5, and the measurement electrodes 2 The electrical conductivity meter 1 is connected to the conductivity meter 1 via the measurement electrode line changeover switch 5 , and the working state of each group of measurement electrodes 2 is switched through the measurement electrode line changeover switch 5 .

For example, the number of measurement electrodes 2 is four. The four measuring electrodes 2 are divided into two groups, two in each group, and one group is placed in different mesh holes 41 in the transverse direction of the grid electrode plate 4 to detect the electrical conductivity between two points in the transverse direction of the skin; A group is placed in different mesh holes 41 in the longitudinal direction of the grid electrode plate 4 to detect the electrical conductivity between two points in the longitudinal direction of the skin. The working state can be switched between different groups of measurement electrodes 2 through the measurement electrode line switch 5 to improve detection efficiency.

For another example, the number of the measuring electrodes 2 is matched with the number of the mesh holes 41 , so that the measuring electrodes 2 are pre-installed in each mesh hole 41 , as shown in FIG. 2 . During measurement, the working state of each group of measurement electrodes 2 is switched by the measurement electrode line switch 5, which can avoid repeating placement of the measurement electrodes 2 during the measurement process, thereby improving the detection efficiency.

According to a preferred embodiment, the measuring electrode 2 has a circular structure, and the diameter of the measuring electrode 2 is 6-15 mm; a conductive paste layer is provided on the side of the measuring electrode 2 that is attached to the skin to be detected. Preferably, the diameter of the measuring electrode 2 is 10 mm and is made of stainless steel. When the measuring electrode 2 is in use, a layer of conductive paste is pre-applied on the side where the measuring electrode 2 is attached to the skin to be tested, and then the measuring electrode 2 is pressed on the skin to be tested to closely adhere to the skin to be tested.

According to a preferred embodiment, the grid electrode plate 4 is made of a bendable material, so that the grid electrode plate 4 can be placed on the skin to be inspected and fit with the skin to be inspected. The bendable material is, for example, a non-toxic plastic material, such as polyethylene material.

According to a preferred embodiment, the mesh holes 41 on the grid electrode plate 4 are of a square structure, and the side length of the mesh holes 41 is equal to the diameter of the measurement electrode 2, so that after the measurement electrode 2 is placed in the mesh hole 41, the measurement electrode 2 can be fixed and the center of the measuring electrode 2 and the center of the mesh 41 coincide with each other, as shown in FIG. 2 . Not limited to this, the mesh holes 41 can also be other shapes, such as circular, triangular, and the like.

The preferred technical solution of this embodiment is to provide a grid electrode plate 4, and the grid electrode plate 4 is provided with mesh holes 41, which is convenient for placing the measuring electrodes 2 on the one hand, and can also fix the distance between the two measuring electrodes 2 on the other hand. Specifically, the side length of the mesh hole 41 is equivalent to the diameter of the measurement electrode 2, so that after the measurement electrode 2 is placed in the mesh hole 41, the measurement electrode 2 can be fixed and the center of the measurement electrode 2 and the center of the mesh hole 41 coincide with each other, It is convenient to calculate the distance between the two measuring electrodes 2 .

According to a preferred embodiment, the distance between the centers of two adjacent mesh holes 41 on the grid electrode plate 4 is equal, and the distance between the centers of two adjacent mesh holes 41 is 0.5-2 cm. Preferably, the distance between the centers of two adjacent mesh holes 41 is 1 cm.

According to a preferred embodiment, the size of the grid electrode plate 4 is 2-6 cm larger than the estimated edge of the trauma lesion, as shown in FIG. 2 . Preferably, the grid electrode plate 4 has a square structure, and the size of the grid electrode plate 4 is 9-15cm*9-15cm. More preferably, the grid electrode plate 4 has a square structure, and the grid electrode plate 4 has one or more specifications of 9cm*9cm, 11cm*11cm, 13cm*13cm and 15cm*15cm. It can be known that the shape of the grid electrode plate 4 is not limited to this, and can also be set to an arc-shaped structure or a structure matching the body parts based on the conditions of various parts of the body. The size of the grid electrode plate 4 can also be set to be larger or smaller.

The location of the lesion is preliminarily determined according to the clinical examination, and the grid electrode plate 4 with a suitable size is selected. The size of the grid electrode plate 4 in the preferred technical solution of this embodiment is 2-6 cm larger than the estimated edge of the trauma lesion, which is convenient for accurate detection of the lesion range and damage. degree.

According to a preferred embodiment, the apparatus for detecting the degree and extent of soft tissue damage in the body based on the electrical impedance method in this embodiment may further include a data processor 6 , as shown in FIG. 1 . Preferably, the data processor 6 is connected to the conductivity meter 1, and the conductivity meter 1 sends the detection data to the data processor 6 for data processing. The data processor 6 is, for example, a computer, discrete logic circuits with logic gates for implementing logic functions on data signals, application specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGA), field programmable gates Array (FPGA) etc.

Example 2

In this embodiment, the method of using the apparatus for detecting the degree and scope of soft tissue damage in the body based on the electrical impedance method of the present invention is described in detail with reference to FIG. 2 .

The method for using the apparatus for detecting the degree and scope of soft tissue damage in the body based on the electrical impedance method in this embodiment includes the following steps:

S1: Determine the estimated range of lesions. Specifically, the lesion site is found based on local skin redness, swelling, heat and pain symptoms and/or skin surface damage. More specifically, based on the symptoms of local skin redness, swelling and fever and/or surface skin damage, sensory inspection methods such as visual inspection and tactile pressure are used to roughly determine the estimated range of lesions.

S2: Select a suitable grid electrode plate 4. In principle, the selected grid electrode plate 4 is 2-6 cm larger than the estimated edge of the lesion. In actual use, an appropriate grid electrode plate 4 can also be selected based on the actual situation.

S3: Connect each component of the device for detecting the degree and extent of soft tissue damage in the body based on the electrical impedance method. Specifically, the measuring electrode 2 is placed in the mesh hole 41 of the grid electrode plate 4 , the measuring electrode 2 is connected to the conductivity meter 1 through the connecting wire 3 , and the conductivity meter 1 detects the electrical conductivity between the two measuring electrodes 2 . conductivity.

The following takes the actual measurement of the skin of the outer middle segment of the thigh as an example to illustrate the use method of the device for detecting the damage degree and scope of the soft tissue of the body based on the electrical impedance method of the present invention.

A grid electrode plate 4 of 9cm*9cm was used. As shown in FIG. 2 , the mesh holes 41 at the four corners of the grid electrode plate 4 are marked as A, B, C, and D respectively, and the mesh holes between the transverse AB mesh holes are marked as AB ₁ , AB ₂ , AB respectively ₃ , AB ₄ , AB ₅ , the meshes between the transverse DC meshes are marked as DC ₁ , DC ₂ , DC ₃ , DC ₄ , and DC ₅ , respectively. _The meshes between the vertical AD meshes are marked as AD1, _AD2 , _AD3 , _AD4 , _AD5 respectively, and the meshes between the vertical BC meshes are marked as _BC1 , _BC2 , _BC3 , BC ₄ , BC ₅ . The distance between two adjacent mesh holes 41 is 1.5 cm. It can be seen that, the more meshes on each side of the grid electrode plate 4, the more accurate the detection result.

The test data are shown in Table 1 below, and the unit is μs/cm.

Table 1

The analysis of the above detection data includes the following processes:

(1) Determination of normal tissue boundaries. The resistance value of normal tissue points is related to factors such as age, gender and weight. Different age groups, different genders, and different weight groups have different resistance values of normal tissue points. Even for the same person, the normal resistance values of different parts may be inconsistent.

In this embodiment, the resistance value of the normal tissue point is searched in the following way: if the two data at the intersection of the horizontal and vertical directions are consistent, it is regarded as a normal resistance value, and the skin tissue at this part is normal and has no damage. Generally speaking, the horizontal and vertical data of the points closest to the four corners are basically the same in the area drawn by a square or rectangle, and the skin tissue in this area is considered to be normal and without damage.

For example, the conductivity values between AB, AD, BC and DC meshes in Table 1 are basically 2.15, which can be considered as normal tissue boundary points.

(2) Analysis of damaged tissue points. As can be seen from Table 1 above, the conductivity between the meshes of AB ₁ and DC ₁ is 2.15, and the conductivity between the meshes of AD ₁ and BC ₁ is 2.15. Therefore, the electrical conductivity at the intersection of the AB ₁ -DC ₁ line and the AD ₁ -BC ₁ line is recorded as 2.15+2.15, that is, the longitudinal detection data is consistent with the transverse detection data, and this place is a normal tissue point.

As shown in Table 1 above, the conductivity between the meshes of AB ₁ and DC ₁ is 2.15, and the conductivity between the meshes of AD ₂ and BC ₂ is 2.82. Therefore, the electrical conductivity at the intersection of the AB ₁ -DC ₁ line and the AD ₂ -BC ₂ line is recorded as 2.15+2.82, that is, the longitudinal detection data is inconsistent with the transverse detection data, and one of the data is negative data (it can also be said to be normal data), then this is the boundary tissue point.

As can be seen in Table 1 above, the conductivity between the meshes of AB ₃ and DC ₃ is 3.55, and the conductivity between the meshes of AD ₃ and BC ₃ is 3.45. Therefore, the electrical conductivity at the intersection of the AB ₃ -DC ₃ line and the AD ₃ -BC ₃ line is recorded as 3.55+3.45, that is, there is no negative data in the longitudinal and transverse test data (it can also be said that there is no normal data), then the place is Damage tissue point.

(3) Judgment of the degree of damage.

Method 1: Judging according to the size of the sum of the vertical detection data and the horizontal detection data at the intersection. Specifically, the greater the value of the detection data, the greater the damage degree here, and vice versa. As shown in Table 1, the electrical conductivity at the intersection of the AB ₃ -DC ₃ line and the AD ₃ -BC ₃ line is 3.55+3.45=7, and the value here is the largest, indicating that the degree of tissue damage is the greatest at this point.

Method 2: Judging according to the degree of damage. Specifically, as shown in Table 1, the longitudinal detection data and transverse detection data of the normal point are 2.15+2.15, and the electrical conductivity at the intersection of the AB ₃ -DC ₃ line and the AD ₃ -BC ₃ line is 3.55+3.45=7. Damage degree=normal point/damage point=(2.15+2.15)/(3.55+3.45)=0.614 degree. The degree of damage varies between 0 and 1, where 1 means no damage, less than 1 means there is damage, the closer to 1, the smaller the degree of damage, and the closer to 0, the greater the degree of damage.

Judging according to the degree of damage can be used to compare the degree of damage between different individuals, the same part or between different parts.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. A device for detecting the injury degree and range of organism soft tissue based on an electrical impedance method is characterized by comprising an electrical conductivity meter (1), at least two measuring electrodes (2), a connecting wire (3) and a grid electrode plate (4), wherein the grid electrode plate (4) is of a hollow structure, each edge of the grid electrode plate (4) is respectively provided with a plurality of meshes (41) for placing the measuring electrodes (2), the measuring electrodes (2) are placed in the meshes (41) and are attached to skin to be detected,

the measuring electrodes (2) are connected with the conductivity meter (1) through the connecting lines (3), and the conductivity between the two measuring electrodes (2) is detected through the conductivity meter (1).

2. The apparatus for detecting the degree and extent of injury to soft tissues of the body based on electrical impedance method according to claim 1, wherein the number of the measuring electrodes (2) is two.

3. The device for detecting the injury degree and range of the soft tissues of the body based on the electrical impedance method according to claim 1, wherein the number of the measuring electrodes (2) is N, N is an even number which is more than or equal to 4, N measuring electrodes (2) are divided into N/2 groups,

the device also comprises a measuring electrode line change-over switch (5), the measuring electrodes (2) are connected with the conductivity meter (1) through the measuring electrode line change-over switch (5), and the working state of each group of measuring electrodes (2) is switched through the measuring electrode line change-over switch (5).

4. The device for detecting the injury degree and range of the soft tissues of the body based on the electrical impedance method according to claim 2 or 3, wherein the measuring electrode (2) is of a circular structure, and the diameter of the measuring electrode (2) is 6-15 mm; and a conductive paste layer is arranged on one side of the measuring electrode (2) which is attached to the skin to be detected.

5. The device for detecting the degree and range of injury to soft tissues of the body based on the electrical impedance method of claim 1, wherein the grid electrode plate (4) is made of a bendable material so that the grid electrode plate (4) can be attached to the skin to be detected when being placed on the skin to be detected.

6. The device for detecting the degree and range of injury to soft tissues of the body based on electrical impedance method of claim 1, wherein the meshes (41) on the grid electrode plate (4) are square structure, and

the side length of the mesh (41) corresponds to the diameter of the measuring electrode (2), so that after the measuring electrode (2) is placed in the mesh (41), the measuring electrode (2) can be fixed and the center of the measuring electrode (2) and the center of the mesh (41) coincide with each other.

7. The device for detecting the injury degree and range of the soft tissues of the body based on the electrical impedance method as claimed in claim 6, wherein the distance between the centers of two adjacent meshes (41) on the grid electrode plate (4) is equal, and the distance between the centers of two adjacent meshes (41) is 0.5-2 cm.

8. The device for detecting the degree and range of injury to soft tissues of the body based on the electrical impedance method according to claim 1, wherein the size of the grid electrode plate (4) is 2-6 cm larger than the estimated wound focus edge.

9. The device for detecting the injury degree and range of the soft tissues of the body based on the electrical impedance method according to claim 8, wherein the grid electrode plate (4) is of a square structure, and the specification of the grid electrode plate (4) is 9-15 cm by 9-15 cm.

10. The device for detecting the injury degree and range of the soft tissues of the body based on the electrical impedance method as claimed in claim 1, further comprising a data processor (6), wherein the data processor (6) is connected with the conductivity meter (1), and the conductivity meter (1) transmits the detected data to the data processor (6) so as to analyze and process the data detected by the conductivity meter (1) through the data processor (6).

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