Skin redness test measuring instrument for judging whether limb tail end is ischemic or not

Abstract

The embodiment of the invention provides a skin redness test measuring instrument used for judging whether limb tail ends are ischemic or not, and relates to the technical field of medical instruments. The upper surface of the limb placing plate comprises a left end, a right end, an upper end and a lower end; the left end and the right end of the air bag belt are connected to the left end and the right end of the limb placing plate respectively; a limb space for placing a limb is formed between the air bag belt and the limb placing plate, and the limb space is provided with an opening into which the limb extends; the opening is positioned at the upper end or the lower end of the limb placing plate; the limb tail end comprises fingers and / or toes; a local tissue fixer for separating adjacent fingers or toes is arranged in the limb space; the local tissue fixator is arranged at the position, close to the metacarpophalangeal joint, of the finger or the toe, and compression of the air bag belt on the tail end of the limb is not disturbed by the arrangement of the local tissue fixator. And the detection box is connected with the limb placing plate and is used for sensing the color of the skin of the limb placed in the limb space.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a skin redness test measuring instrument for determining whether an extremity is ischemic. Background Art

[0002] The flushing test is a clinical examination method used to assess blood supply to the extremities. During this test, the patient typically lies supine, and the physician applies pressure to the soles of their toes for one minute to drain blood from the extremities. The skin will then turn pale. If the skin turns from white to red within 1-3 seconds after the pressure is removed (hereinafter referred to as the "blood flow recovery time"), the test is considered normal and the result is negative. If the blood flow recovery time exceeds 3 seconds, or if there is spotty redness, the test result is positive, indicating insufficient blood flow to the extremities. This flushing test is often used to determine whether limb ischemia is present in conditions such as lower limb arteriosclerosis obliterans or vasculitis, and can provide a certain degree of insight into extremity blood flow.

[0003] Currently, the clinical examination method of the redness test is a specialized examination performed by vascular surgeons. However, non-vascular clinicians or non-medical personnel often encounter certain scenarios where they need to determine whether a patient has acute or chronic limb ischemia. However, they often do not have sufficient understanding of this physical examination method and lack the ability to determine the condition of limb ischemia. This, to a certain extent, leads to delayed diagnosis and treatment of patients, resulting in necrosis of limb ischemia due to prolonged limb ischemia, amputation, and subsequent disability, and even life-threatening conditions. For example, patients with limb trauma, acute limb thrombosis, chronic limb pain symptoms, and those at high risk for limb ischemic disease all need to determine whether vascular disease or vascular injury is causing limb ischemia. These scenarios may occur in non-vascular surgery clinical departments, during the diagnosis, treatment, and monitoring of high-risk groups for limb ischemic disease at home, and in ambulances. There is a need to determine whether limb ischemia is present. Even some emergencies require urgent judgment.

[0004] During the redness test, the traditional method is to make a rough judgment by visually observing the change in skin color. This method has the problem of unstable judgment of blood circulation recovery time, and may be affected by the subjective degree of the examiner, the ambient light conditions, and the cleanliness of the local skin of the affected limb, and it is impossible to accurately obtain the accurate blood circulation recovery time. Patent application number 202020850725.0 proposes a method of quantitative assessment of extremity ischemia to solve the problem of quantitative assessment of blood circulation time detected by the redness test, but the quantitative assessment instrument still has the following defects, such as: (1) When measuring toes or fingers, only a single toe or finger can be tested, and during the test, the relative position of the tested limb end and the test box is easy to change, making the measurement result inaccurate; (2) The measurement object can only be the limb end, and the palm or sole surface cannot be measured. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a skin redness test measuring instrument for determining whether an extremity is ischemic.

[0006] The present application discloses a skin redness test measuring instrument for determining whether a limb extremity is ischemic, comprising:

[0007] A limb placement board, wherein the upper surface of the limb placement board includes a left end, a right end, an upper end, and a lower end;

[0008] An airbag belt, wherein the left and right ends of the airbag belt are respectively connected to the left and right ends of a limb placement board; a limb space for placement of a limb is formed between the airbag belt and the limb placement board, and the limb space has an opening for insertion of the limb; the opening is located at the upper or lower end of the upper surface of the limb placement board; the extremities of the limb include fingers and / or toes; a local tissue fixator is provided in the limb space for separating adjacent fingers or toes; the local tissue fixator is provided near the metacarpophalangeal joint of the fingers or toes, and the provision of the local tissue fixator does not interfere with the compression of the extremities by the airbag belt;

[0009] The detection box is connected to the limb placement plate and is used to sense the color of the limb skin placed in the limb space.

[0010] In a more specific embodiment of this aspect, at least one local tissue fixation device is provided;

[0011] In a more specific embodiment of this aspect, four local tissue fixators are provided, and local spaces for placing fingers and / or toes are provided between adjacent local tissue fixators.

[0012] In a more specific embodiment of this aspect, the upper surface of the limb placement board is provided with extremity test windows, and the number of the extremity test windows is one more than the number of the local tissue fixators; when the upper surface of the limb placement board is facing upward, the extremity test windows are located in the area between the upper end of the upper surface of the limb placement board and the local tissue fixators;

[0013] The extremity test window includes a left edge and a right edge, and a straight-line distance greater than or equal to 0 mm exists between the left edge and the right edge of the extremity test window and at least one nearest local tissue fixator.

[0014] In a more specific embodiment of this aspect, a palmar test window is also provided on the upper surface of the limb placement board. When the upper surface of the limb placement board is facing upward, the palmar test window is located in the area between the local tissue fixator and the lower end of the upper surface of the limb placement board.

[0015] In a more specific embodiment of this aspect, fixed holes corresponding to the extremity test windows and / or palm test windows are provided at the bottom of the limb placement board, and the redness time of the affected toes is measured one by one.

[0016] In a more specific embodiment of this aspect, the measuring instrument further includes an inflation handle sequentially connected to the airbag belt and interconnected therewith. The inflation handle pressurizes the airbag manually or automatically. A valve is provided on one side of the airbag, which is connected to the other handle via an air guide tube. Furthermore, the airbag is provided with a soft, skin-friendly material on the inside. In a more specific embodiment of this aspect, the valve is a knob-type valve for exhaust and pressure relief.

[0017] In a more specific embodiment of this aspect, a local tissue fixing pedal is provided at the upper end or the lower end of the bottom of the limb placement board for placing and accommodating various lines.

[0018] In a more specific embodiment of this aspect, the detection box includes a detection probe, a circuit module, a display module, and a sensor array communication interface; the detection probe includes an optical path module and a detector module; the detection probe is connected to the test window through a fixed hole; the optical path module transmits the local tissue skin color change signal of the test window to the detector module; the circuit module processes the data collected by the detector module and displays it on the display module; the display module controls the start and end of the test, displays the data in real time during the test, and displays the blood circulation recovery time according to the time of the local tissue skin color change.

[0019] In a more specific embodiment of this aspect, a sensor array is further provided on the upper surface of the limb placement board. Data and signals collected by the sensor array are transmitted via a sensor array communication interface; the sensor array communication interface is connected to the limb placement board via a connecting cable. The sensor array integrates sensors for skin temperature, pulse oximetry or transcutaneous oxygen partial pressure, blood pressure, heart rhythm, and heart rate data.

[0020] In a more specific embodiment of this aspect, the housing of the detection box is provided with a switch, a charging port and a USB interface, and the data is exported through the USB interface.

[0021] Beneficial effects of the present invention:

[0022] 1. Through structural optimization design, the entire extrusion process of the patient's limb can be completed at one time, ensuring that the relative position of the patient's limb and the test box remains unchanged during the test, making the test results more accurate;

[0023] 2. Use the inflatable handle and the airbag belt to pressurize and release the fixed local tissue, which can perfectly wrap the position of the tissue to be tested. The pressure increase and release process can be controlled independently. If the patient experiences discomfort during the test, the pressure can be stopped at any time. Use an inflatable airbag instead of a bandage to squeeze the patient's extremities. The airbag can fit the shape of the patient's extremities better, making the squeezing process smoother and more reliable, and the force on the extremities more even, achieving a better squeezing effect.

[0024] 3. During the decompression process, real-time data on skin color changes detected by the test window can be collected, allowing accurate blood circulation time. The modular design concept separates the limb fixation and detection components, and multiple observation windows are added to the limb fixation module, allowing doctors to observe blood circulation changes in multiple areas of the patient's limb as needed.

[0025] 4. Based on optical principles, the skin color change process of local tissues of the patient's body during pressurization and decompression can effectively make up for the shortcomings of the traditional "redness test" method in accuracy and sensitivity. In response to skin color changes, a colorimetric sensor and achromatic optical design lens group are used to obtain a more accurate skin color change process.

[0026] 5. Add a sensor array to obtain the patient's skin temperature, finger pulse oxygen (or transcutaneous oxygen partial pressure), blood pressure, heart rhythm, and heart rate data to assist clinicians in making more accurate diagnoses. The entire compression process can detect ischemic time, skin temperature, finger pulse oxygen (or transcutaneous oxygen partial pressure), blood pressure, heart rhythm, and heart rate data, providing doctors with rich auxiliary information.

[0027] 6. By drawing on the Internet of Things and cloud platform technologies, patients and non-professionals can exchange information with doctors through measuring instruments in various application scenarios, making it easier for doctors to give advice based on the patient's condition; using Internet technology, patient data can be collected in the cloud, allowing doctors to track changes in the patient's blood circulation over time and build a more convenient communication channel between doctors and patients.

[0028] 7. The method of determining blood circulation time based on a portable tissue ischemia measurement instrument can improve the accuracy of data acquisition, effectively reduce the professional requirements of the "redness test" method, and provide patients, doctors and other personnel with convenient assistance in daily care, treatment effect evaluation, disease screening and other processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic diagram of the overall structure of a skin redness test measuring instrument for determining whether an extremity is ischemic, provided by at least one embodiment of the present invention;

[0031] Figure 2 A schematic top view of at least one embodiment of the present invention, wherein the upper surface of the limb placement plate faces upward (with the airbag belt hidden);

[0032] Figure 3 A schematic diagram of the partial structure of the connection between the limb placement plate and the detection box provided in at least one embodiment of the present invention;

[0033] Figure 4 A schematic diagram of the external structure of a detection box provided by at least one embodiment of the present invention;

[0034] Figure 5 A schematic diagram of the internal structure of a detection box provided by at least one embodiment of the present invention;

[0035] In the figure, 1. limb placement board; 101. upper surface; 102. left end; 103. right end; 104. upper end; 105. lower end; 106. local tissue fixator; 107. limb test window; 108. palmar test window; 109. fixing hole; 110. local tissue fixation pedal; 111. sensor array;

[0036] 2. Airbag belt; 201. Limb space; 202. Opening; 203. Inflation handle; 204. Air guide tube; 205. Fixing port;

[0037] 3. Detection box; 301. Detection probe; 302. Circuit module; 303. Display module; 304. Sensor array communication interface; 305. Optical path module; 306. Detector module; 307. Switch; 308. Charging port; 309. USB interface; 310. Connecting cable. DETAILED DESCRIPTION

[0038] The following is a clear and complete description of the technical solutions in the embodiments of the present invention through specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation methods. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] It should be noted that, in the description of the present invention, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] Furthermore, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0041] The embodiments of the present disclosure and examples thereof are described in detail below with reference to the accompanying drawings.

[0042] Figure 1 1 is a schematic diagram of the overall structure of a skin redness test measuring instrument for determining whether a limb extremity is ischemic, provided in this embodiment. This specific embodiment comprises: a limb placement board 1, wherein an upper surface 101 of the limb placement board 1 includes a left end 102, a right end 103, an upper end 104, and a lower end 105;

[0043] An airbag belt 2, the left end 102 and the right end 103 of the airbag belt 2 are respectively connected to the left end 102 and the right end 103 of the limb placement board 1; a limb space 201 for placing a limb is formed between the airbag belt 2 and the limb placement board 1, and the limb space 201 has an opening 202 for the limb to extend into; the opening 202 is located at the upper end 104 or the lower end 105 of the upper surface 101 of the limb placement board 1; the extremities of the limbs include fingers and / or toes; a local tissue fixator 1 for separating adjacent fingers or toes is provided in the limb space 201 06, so that each toe is in the appropriate position, corresponding to the area of ​​multiple toes separated by the test window corresponding to the local tissue fixator 106, to ensure that the toes are in the corresponding test window position; the local tissue fixator 106 is set at the proximal metacarpophalangeal joint position of the finger or toe, and the setting of the local tissue fixator 106 will not interfere with the compression of the airbag belt 2 on the extremity; the left end 102 and the right end 103 of the limb placement board 1 are respectively provided with fixing ports 205 for connecting and fixing the left end 102 and the right end 103 of the airbag belt 2;

[0044] The detection box 3 is connected to the limb placement plate 1 and is used to sense the color of the skin of the limb placed in the limb space 201.

[0045] In a more specific embodiment of this aspect, at least one local tissue fixator 106 is provided; for example, Figure 1 and Figure 2 As shown, in one embodiment, four local tissue fixators 106 are provided, and local spaces for placing fingers and / or toes are provided between adjacent local tissue fixators 106 .

[0046] In one embodiment, the side of the airbag belt 2 close to the limb placement board 1 is the inner side, and the local tissue fixator 106 is arranged on the inner side of the airbag belt 2 or on the upper surface 101 of the limb placement board 1 . Figure 1 and Figure 2 The local tissue fixator 106 shown in FIG. 1 is disposed on the upper surface 101 of the limb placement plate 1 , but the specific location is not limited thereto.

[0047] In a specific embodiment, the upper surface 101 of the limb placement board 1 is provided with an extremity test window 107, and the number of the extremity test window 107 is one more than the number of the local tissue fixator 106; when the upper surface 101 of the limb placement board 1 is facing upward, the extremity test window 107 is located in the area between the upper end 104 of the upper surface 101 of the limb placement board 1 and the local tissue fixator 106;

[0048] The extremity test window 107 includes a left edge 102 and a right edge 103. There is a linear distance of greater than or equal to 0 mm between the left edge 102 and the right edge 103 of the extremity test window 107 and the nearest at least one local tissue fixator 106. Figure 2 As shown, the number of local tissue fixators 106 is set to 4, and the number of limb test ports is set to 5 to meet the basic structural requirements of the human foot. Figure 2 In the figure, considering the different sizes and fit of the five fingers or toes, the five extremity test ports are also set at different distances. However, the left end 102 edge and the right end 103 edge of the extremity test window 107 always maintain a straight-line distance greater than or equal to 0 mm from the at least one nearest local tissue fixator 106. For example, from left to right, for the first extremity test window 107 on the left, the line passing through the left edge and parallel to the vertical line does not coincide with the edge line of the upper surface 101, and the line passing through the right edge and parallel to the vertical line does not coincide with the left edge line of the first local tissue fixator 106 on the left; for the second extremity test window 107 on the left, the line passing through the left edge and parallel to the vertical line does not coincide with the right edge line of the first local tissue fixator 106 on the left, and the line passing through the right edge and parallel to the vertical line does not coincide with the left edge line of the second local tissue fixator 106 on the left; and so on.

[0049] In another specific embodiment, the upper surface 101 of the limb placement board 1 is further provided with a palmar surface test window 108. When the upper surface 101 of the limb placement board 1 is facing upward, the palmar surface test window 108 is located in the area between the local tissue fixator 106 and the lower end 105 of the upper surface 101 of the limb placement board 1. Figure 2 As shown, the palmar surface test ports are set to three, enabling measurement of different areas of the palmar surface. This effectively overcomes the problem of the first-generation product when measuring toes or fingers, which affected the compression and detection of the target toes or fingers due to the inability to effectively separate the toes or fingers of some patients, resulting in inaccurate measurement results. In the accompanying drawings, the extremity test window 107 and the palmar surface test window 108 are drawn as circles for ease of illustration, but their shapes can also be square, elliptical, or other shapes, and are not limited in this embodiment.

[0050] In a more specific embodiment of this aspect, Figure 3 As shown, fixed holes 109 corresponding to the extremity test windows 107 and / or the palm surface test windows 108 are set at the bottom of the limb placement board 1, and the redness time of the affected toes is measured one by one.

[0051] In one embodiment, Figure 1 As shown, the measuring instrument also includes an inflation handle 203, which is sequentially connected to the airbag belt 2 and interconnected. The inflation handle 203 pressurizes the airbag manually or automatically. A valve is provided on one side of the airbag (not shown in the drawings; a conventional structure will suffice). The airbag is connected to the other handles via an air guide tube 204. Furthermore, a soft, skin-friendly material is provided on the inside of the airbag (not shown in the drawings; a conventional structure will suffice). In a more specific embodiment of this aspect, the valve is a knob-type valve to achieve air and pressure relief.

[0052] In a more specific embodiment of this aspect, a local tissue fixing pedal 110 is provided at the upper end 104 or the lower end 105 of the bottom of the limb placement board 1 for placing and accommodating various lines.

[0053] In a more specific embodiment of this aspect, Figure 3 and Figure 4As shown, the detection box 3 includes a detection probe 301, a circuit module 302, a display module 303, and a sensor array communication interface 304; the detection probe 301 includes an optical path module 305 and a detector module 306; the detection probe 301 is connected to the test window through the fixed hole 109; the optical path module 305 transmits the local tissue skin color change signal of the test window to the detector module 306; the circuit module 302 processes the data collected by the detector module 306 and displays it on the display module 303; the display module 303 controls the start and end of the test, displays the data in real time during the test, and displays the blood circulation recovery time according to the time of the local tissue skin color change.

[0054] In a more specific embodiment of this aspect, a sensor array 111 is further provided on the upper surface 101 of the limb placement board 1. The data and signals collected by the sensor array 111 are transmitted via a sensor array communication interface 304; the sensor array communication interface 304 is connected to the limb placement board 1 via a connecting line 310. The sensor array 111 integrates sensors for skin temperature, pulse oxygen or transcutaneous oxygen partial pressure, blood pressure, heart rhythm, and heart rate data.

[0055] In a more specific embodiment of this aspect, the housing of the detection box 3 is provided with a switch 307 , a charging port 308 and a USB interface 309 , and data is exported via the USB interface 309 .

[0056] In one embodiment, the system comprises three core components: a cloud platform and a doctor's data terminal (including but not limited to computers, mobile apps, tablets, etc.). The measuring instrument uses multiple sensors to collect data on the patient's skin temperature, pulse oxygen (or transcutaneous oxygen partial pressure), blood pressure, heart rhythm, and heart rate by compressing the skin's color changes, providing a basis for determining blood supply to local tissues. Depending on the settings, the data results can be transmitted via wireless data modules (including but not limited to 4G, 5G, Bluetooth, Wi-Fi, etc.) to a data transmission terminal (including but not limited to any device or equipment capable of data communication with the cloud platform) for data exchange with the cloud platform (including but not limited to test results, doctor's opinions, and other auxiliary information). The cloud platform then sends the data results to the doctor based on the compatibility between the measuring instrument and the doctor's data terminal, who then provides specific advice based on the data results. The measuring instrument can also directly exchange data with the doctor's data terminal via data transmission methods including but not limited to USB and RS232.

[0057] The specific operation method for determining blood circulation time using the measuring instrument disclosed in this embodiment is as follows:

[0058] Step 1: Place the patient's local tissue to be tested on the local tissue fixing pedal 110 and the local tissue fixator 106, adjust the testing position so that the test window effectively covers the local skin tissue to be tested, insert the detection box 3 into the fixing hole 109 at the rear end of the test window of the local tissue to be tested, and record the initial color value H0, skin temperature, finger pulse oxygen (or transcutaneous oxygen partial pressure), blood pressure, heart rhythm, and heart rate of the covered local skin tissue;

[0059] Step 2: Manually control the inflation handle 203 to start inflation, so that the airbag belt 2 fully squeezes the local tissue fixed in step 1. When the detection box 3 detects that the skin color of the tissue at the test window end no longer changes, it sends a signal to prompt the end of inflation and records the current time t1. It also displays / saves the skin temperature, finger pulse oxygen (or transcutaneous oxygen partial pressure), blood pressure, heart rhythm, and heart rate data in real time;

[0060] Step 3: The inflation handle 203 begins to release pressure, and the detection box 3 collects the color change process of the local tissue skin covered by the test window at the set time interval. After each collection is completed, the obtained color value Hn is processed with the initial color value H0. If the data processing result matches the set judgment rule, the tissue skin covered by the test window is considered to have returned to the initial state, and the time t2 is recorded. The skin temperature, finger pulse oxygen (or transcutaneous oxygen partial pressure), blood pressure, heart rhythm, and heart rate data are displayed / saved in real time;

[0061] Step 4: The detection box 3 processes the time parameters t1 and t2 obtained in steps 2 and 3, compares the data processing results with the preset ischemia time judgment criteria, and gives the evaluation results on the display screen of the detection box 3, and displays / saves the skin temperature, finger pulse oxygen (or transcutaneous oxygen partial pressure), blood pressure, heart rhythm, and heart rate data in real time.

[0062] Step 5: Upload the ischemic time, skin temperature, finger pulse oxygen (or transcutaneous oxygen partial pressure), blood pressure, heart rhythm, and heart rate data obtained in steps 1 to 4 according to the settings to the cloud platform using the wireless data module and forward it to the doctor's data terminal;

[0063] Step 6: The cloud platform sends the received measuring instrument data to the doctor's data terminal. The doctor gives his opinion and other information based on the data results and uploads it to the cloud platform;

[0064] Step 7: If data exchange is set to be performed through the cloud platform, the measuring instrument can proceed to the next set of tests according to the actual situation. When the results are received from the cloud platform, the results can be checked through audio and visual prompts.

[0065] Step 8: If data transmission is set via USB, RS232, etc., the measuring instrument can perform the next set of tests according to the actual situation, and then transmit data when receiving the command.

[0066] This device uses Hamamatsu's S11012-01CR color sensor, which converts the three primary colors of red, green, and blue (RGB) into electrical signals and outputs the numerical values ​​of the three primary colors.

[0067] In this device, the skin end is placed on the local tissue fixing pedal 110. During collection, the LED on the RGB sensor in the detection box 3 will start working and shine on the test window. The skin light signal on the test window is reflected back into the detection box 3 through the detection probe 301 on the detection box 3 and incident on the RGB sensor of S11012-01CR. The sensor receives the incident light signal, and the internal red, green and blue photosensitive elements will convert the light signal into photocurrent. According to the size of the measured photocurrent, the RGB components of the incident light are determined, and the corresponding skin color change is output.

[0068] Please note that the models of the above-mentioned sensors are not limited to the above-mentioned models, and the limitation of the models does not have any limiting effect on the scope of protection of this application.

[0069] There are a few points to note:

[0070] (1) The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure. Other structures may refer to conventional designs.

[0071] (2) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to form new embodiments.

[0072] The above description is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. The protection scope of the present disclosure shall be based on the protection scope of the claims.

[0073] The above embodiments are only for understanding the present invention. It should be noted that, for those skilled in the art, several improvements can be made to the present invention without departing from the principles of the present invention, and these improvements will also fall within the scope of protection of the claims of the present invention.

Claims

1. A skin redness test measuring instrument for determining whether a limb extremity is ischemic, characterized in that: include: A limb placement board, wherein the upper surface of the limb placement board includes a left end, a right end, an upper end, and a lower end; An airbag belt, wherein the left and right ends of the airbag belt are respectively connected to the left and right ends of the limb placement board; a limb space for placing a limb is formed between the airbag belt and the limb placement board, and the limb space has an opening for the limb to extend into; the opening is located at the upper end or the lower end of the upper surface of the limb placement board; the limb extremities include fingers and / or toes; a local tissue fixator is provided in the limb space for separating adjacent fingers or toes; the local tissue fixator is provided near the metacarpophalangeal joint of the fingers or toes, and the provision of the local tissue fixator does not interfere with the compression of the limb extremities by the airbag belt; The detection box is connected to the limb placement plate and is used to sense the color of the skin of the limb placed in the limb space.

2. The skin redness test measuring instrument for determining whether the extremities are ischemic according to claim 1, characterized in that: At least one local tissue fixator is provided.

3. The skin redness test measuring instrument for determining whether the extremities are ischemic according to claim 2, characterized in that: Four local tissue fixators are provided, and local spaces for placing fingers and / or toes are provided between adjacent local tissue fixators.

4. The skin redness test measuring instrument for determining whether the extremities are ischemic according to claim 3, characterized in that: The upper surface of the limb placement board is provided with extremity test windows, and the number of the extremity test windows is one more than the number of the local tissue fixators; when the upper surface of the limb placement board is facing upward, the extremity test windows are located in the area between the upper end of the upper surface of the limb placement board and the local tissue fixators; The extremity test window includes a left edge and a right edge, and a linear distance greater than or equal to 0 mm exists between the left edge and the right edge of the extremity test window and at least one nearest local tissue fixator.

5. The skin redness test measuring instrument for determining whether the extremities are ischemic according to claim 3, characterized in that: The upper surface of the limb placement board is also provided with a palmar test window. When the upper surface of the limb placement board is facing upward, the palmar test window is located in the area between the local tissue fixator and the lower end of the upper surface of the limb placement board.

6. The skin redness test measuring instrument for determining whether the extremities are ischemic according to claim 5, characterized in that: Fixed holes corresponding to the extremity test windows and / or the palm surface test windows are arranged on the bottom of the limb placement plate.

7. The skin redness test measuring instrument for determining whether the extremities are ischemic according to claim 1, characterized in that: The measuring instrument also includes an inflation handle which is sequentially connected to the airbag belt and is interconnected. The inflation handle pressurizes the airbag by manual or automatic pressing. An air valve is provided on one side of the airbag, and the airbag is connected to other handles through an air guide line.

8. The skin redness test measuring instrument for determining whether the extremities are ischemic according to claim 3, characterized in that: The detection box includes a detection probe, a circuit module, a display module, and a sensor array communication interface; the detection probe includes an optical path module and a detector module; the detection probe is connected to the test window through a fixed hole; the optical path module transmits the local tissue skin color change signal of the test window to the detector module; the circuit module processes the data collected by the detector module and displays it on the display module; the display module controls the start and end of the test, displays data in real time during the test, and displays the blood circulation recovery time based on the time of local tissue skin color change.

9. The skin redness test measuring instrument for determining whether the extremities are ischemic according to claim 8, characterized in that: A sensor array is also provided on the upper surface of the limb placement board, and the data and signals collected by the sensor array are transmitted through the sensor array communication interface; the sensor array communication interface is connected to the limb placement board via a connecting line; the sensor array is used to collect skin temperature, finger pulse oxygen or transcutaneous oxygen partial pressure, blood pressure, heart rhythm, and heart rate data.

10. The skin redness test measuring instrument for determining whether a limb extremity is ischemic according to any one of claims 1 to 9, characterized in that: The shell of the detection box is provided with a switch, a charging port and a USB interface, and the data is exported through the USB interface.

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