Hemostasis device capable of controlling temperature in real time and protecting overheating

Abstract

The invention relates to the technical field of medical instruments, in particular to a hemostasis device capable of controlling temperature in real time and protecting overheating. Comprising a light guide fiber, a heat conductor, a heat insulation cylinder and a control system, the light guide fiber is movably connected in the heat insulation cylinder, the outer wall of one end of the light guide fiber is coated with the heat conductor, and the light guide fiber and the heat conductor are connected with the control system; the control system comprises an excitation source, a laser, a control circuit and an overheat protection circuit, the excitation source is communicated with the laser, the laser is communicated with the light guide optical fiber, the light guide optical fiber converts received laser into heat energy and is used for heating the heat conductor, the heat conductor is connected with the overheat protection circuit, and the overheat protection circuit is connected with the control circuit. The overheat protection circuit controls the control circuit to be switched on and off according to the resistance value of the heat conductor; automatic control and overheating protection are achieved, and therefore bleeding is effectively stopped, and secondary damage to tissue after puncture is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a hemostatic device capable of real-time temperature control and overheat protection. Background Art

[0002] In the early stages of cancer, due to the lack of specific clinical manifestations, a puncture biopsy is required for qualitative diagnosis. However, due to the puncture depth, whether the blood vessel is punctured, and other factors, the tissue after puncture will have varying degrees of bleeding. For example, the incidence of post-biopsy bleeding in lung puncture is 5%-50%. Some patients even develop complications such as coughing up blood due to bleeding, so effective hemostasis after puncture is very important.

[0003] Most of the existing puncture hemostasis devices are based on optical fiber, which has the advantages of small size, flexible operation, and adjustable temperature, and performs well in puncture hemostasis. The principle of optical fiber hemostasis is light heating. The laser outputs laser, converts light energy into heat energy through the optical fiber, and heats the target hemostasis site through the heat conduction device. When the temperature reaches the protein denaturation temperature, the tissue achieves coagulation and hemostasis. For this type of hemostasis device, once the temperature reaches the tissue hemostasis temperature, it is necessary to control the external excitation in time and stop the light input to avoid continuous heating of light causing tissue carbonization, burning normal tissue and expanding the wound. To this end, the optical fiber heating hemostasis device will use sensors installed on the outside of the heat conduction structure, such as temperature sensors, position sensors, photoelectric, photosensitive devices or thermocouples, etc., and the collected signals are used as control signals to adjust the laser output parameters through the installed above sensors. Obviously, the essence of control achieved through the sensor acquisition circuit is based on the signal conversion circuit. Any conversion circuit has certain sensitivity and delay problems, and the sensor is often a separate structure installed on the outside of the heat conductor, which poses a risk of falling off and failure. Once it falls off or a circuit failure occurs, the heat conductor will continue to heat the tissue, causing irreversible damage to the tissue.

[0004] Therefore, there is an urgent need to provide a hemostatic device with real-time temperature control and overheat protection, which can realize automatic control and overheat protection compared with the existing technology, thereby effectively stopping bleeding and avoiding secondary tissue damage after puncture. Summary of the invention

[0005] The present invention solves the technical problems existing in the prior art and provides a hemostatic device capable of real-time temperature control and overheat protection.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A hemostatic device capable of real-time temperature control and overheat protection, comprising an optical fiber, a heat conductor, a heat insulating tube and a control system, wherein the heat insulating tube is movably connected to the optical fiber, the heat conductor is coated on the outer wall of one end of the optical fiber, and the optical fiber and the heat conductor are both connected to the control system;

[0008] The control system includes an excitation source, a laser, a control circuit and an overheat protection circuit. The excitation source is connected to the laser, the laser is connected to the optical fiber, the optical fiber converts the received laser into heat energy, the optical fiber is used to heat the heat conductor, the heat conductor is connected to the overheat protection circuit, the overheat protection circuit is connected to the control circuit, and the overheat protection circuit controls the control circuit to be turned on and off according to the resistance value of the heat conductor.

[0009] Furthermore, the heat conductor includes a first heat conducting layer and a second heat conducting layer, the first heat conducting layer is made of vanadium dioxide, the second heat conducting layer is made of metal, alloy or ceramic material, and the first heat conducting layer is connected to the overheat protection circuit.

[0010] Furthermore, the overheating protection circuit includes a temperature acquisition circuit, which includes a wiring terminal, a NOT gate chip and a first resistor, one end of the first resistor is connected to the positive pole of the power supply, the other end of the first resistor is connected to a port of the wiring terminal, the other port of the wiring terminal is connected to the negative pole of the power supply, the negative pole of the power supply is grounded, the wiring terminal is connected in parallel with the NOT gate chip, the NOT gate chip is provided with five ports, namely, an NC terminal, an A terminal, a GND terminal, a VCC terminal and a Y terminal, the NC terminal is connected to the first thermal conductive layer, the A terminal is connected to an end of the first resistor away from the positive pole of the power supply, the GND terminal is grounded, the VCC terminal is connected to the positive pole of the power supply, and the Y terminal outputs a level signal.

[0011] Furthermore, the overheat protection circuit also includes a voltage follower circuit, and a switch circuit is provided in the control circuit. The on and off of the switch circuit is controlled according to the voltage output by the voltage follower circuit, and the input of the voltage follower circuit is the level signal output by the temperature acquisition circuit.

[0012] Furthermore, the voltage follower circuit includes an operational amplifier, a field effect transistor, a capacitor, a second resistor and a third resistor, one end of the second resistor is connected to the positive electrode of the power supply, the other end of the second resistor is connected to the D electrode of the field effect transistor, the S electrode of the field effect transistor is connected to the inverting input terminal of the operational amplifier, the G electrode of the field effect transistor receives the level signal output by the temperature acquisition circuit, the in-phase input terminal and the negative power supply terminal of the operational amplifier are both grounded, and the positive power supply terminal of the operational amplifier is connected to the positive electrode of the power supply; the second resistor is connected to the output terminal of the operational amplifier, and the third resistor is connected in series on the connected line; an output port is provided on the line connecting the second resistor to the output terminal of the operational amplifier, the output port is located between the third resistor and the output terminal of the operational amplifier, and the output port outputs a voltage; the capacitor is connected in parallel between the inverting input terminal and the output terminal of the operational amplifier.

[0013] Furthermore, the resistance values ​​of the first resistor, the second resistor, and the third resistor are set to be the same.

[0014] Furthermore, the control method for the on and off of the switch circuit is: setting a temperature threshold, when the first heat conductive layer reaches the temperature threshold, the overheat protection circuit forms a loop, the NOT gate chip inputs a low level signal and outputs a high level signal NET1, the voltage follower circuit inputs NET1 and outputs voltage NET2, and the voltage NET2 controls the switch circuit to disconnect.

[0015] Furthermore, when the material of the first heat-conducting layer is only vanadium dioxide, the temperature threshold is 68°C; the material of the first heat-conducting layer can also be vanadium dioxide, aluminum, and germanium according to the mass doping ratio a:b:c, and the material injected with 1MeV energy, the temperature threshold is obtained according to the following method:

[0016] A deep learning model is set. In the deep learning model, the overheat protection circuit is used as a learning model. The mass of vanadium dioxide is a fixed value. The unit doping mass is set. Different amounts of unit doping mass of aluminum and germanium are doped into the vanadium dioxide to form a variety of first thermal conductive layers. Each first thermal conductive layer is connected to the non-gate chip. When the temperature acquisition circuit outputs the NET11 signal and the voltage follower circuit outputs the NET12 signal, the temperature value of the first thermal conductive layer at this time is taken as the temperature threshold value under the mass doping ratio of the vanadium dioxide, aluminum and germanium; wherein the NET11 signal is the output signal of the temperature acquisition circuit when the material of the first thermal conductive layer is only vanadium dioxide and the temperature threshold is 68°C, and the NET12 signal is the output signal of the voltage follower circuit when the material of the first thermal conductive layer is only vanadium dioxide and the temperature threshold is 68°C.

[0017] Furthermore, the thermal insulation cylinder includes a first cylinder and a second cylinder, the first cylinder is sleeved outside the second cylinder, the second cylinder is threadedly connected to the first cylinder, the optical fiber is connected to the second cylinder, and the heat conductor is arranged at the end of the optical fiber away from the second cylinder.

[0018] Furthermore, the second heat-conducting layer is arranged farther away from the second cylinder than the first heat-conducting layer.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The present invention sets a first heat-conducting layer and a second heat-conducting layer on the outside of the optical fiber. The first heat-conducting layer is a coating of vanadium dioxide, which is a phase change material. It does not increase the volume of the device and does not have the risk of falling off. The first heat-conducting layer is directly connected to the overheating protection circuit. The property of the relationship between the resistance and temperature change of the phase change material is used to set the temperature threshold. The on-off of the control circuit is controlled by the voltage follower circuit. No signal processing conversion circuit is required. It is directly connected to the excitation source, and the controller is turned on and off to achieve automatic control, thereby effectively stopping bleeding.

[0021] (2) The present invention provides a retractable heat-insulating cylinder. When performing a hemostatic operation, the optical fiber is screwed out of the first cylinder, and the second heat-conducting layer is brought into contact with the tissue to perform the hemostatic operation. After the hemostatic operation is completed, during the removal process, since it takes a certain amount of time for the temperature of the second heat-conducting layer to drop to 0°C, the second heat-conducting layer can be directly screwed into the first cylinder. In this way, during the removal process of the present invention, the heat conductor will not contact other tissues, thus avoiding contact between other tissues and the heat conductor. It can also save the time required to wait for the heat conductor to drop to 0°C, thereby achieving overheating protection and avoiding secondary damage to the tissue after puncture. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 It is a schematic diagram of the control system of the present invention.

[0024] Figure 3 It is a structural schematic diagram of the temperature acquisition circuit of the present invention.

[0025] Figure 4 It is a schematic diagram of the structure of the voltage follower circuit of the present invention.

[0026] Description of reference numerals:

[0027] 1. Optical fiber; 2. Heat conductor; 21. First heat-conducting layer; 22. Second heat-conducting layer; 3. Heat-insulating tube; 31. First tube body; 32. Second tube body; P1. Wiring terminal; R1. First resistor; U2. NOT gate chip; R2. Second resistor; R3. Third resistor; C1. Capacitor; U1. Operational amplifier; Q1. Transistor; T. Output port. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention. It should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", etc. is based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply 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.

[0029] like Figure 1 and Figure 2 As shown, the present invention provides a hemostatic device with real-time temperature control and overheat protection, comprising an optical fiber 1, a heat conductor 2, an insulation tube 3, and a control system. The optical fiber 1 is arranged inside the insulation tube 3, and the optical fiber 1 is slidably connected inside the insulation tube 3. The heat conductor 2 is arranged on the outer wall of the end of the insulation tube 3 where the optical fiber 1 can extend. When the optical fiber 1 extends out of the insulation tube 3, the heat conductor 2 is located outside the insulation tube 3; the optical fiber 1 and the heat conductor 2 are both electrically connected to the control system.

[0030] The heat conductor 2 includes a first heat conducting layer 21 and a second heat conducting layer 22. The first heat conducting layer 21 and the second heat conducting layer 22 are both coated on the outer wall of the optical fiber 1. The first heat conducting layer 21 is located in the middle of the optical fiber 1 relative to the second heat conducting layer 22. The first heat conducting layer 21 is made of coated vanadium dioxide. The preparation method of the vanadium dioxide layer includes physical vapor deposition, sol-gel method, chemical vapor deposition method, laser deposition method, etc.; the second heat conducting layer 22 is made of coated metal or alloy or ceramic material. The metal includes aluminum, copper, silver, the alloy includes titanium alloy, and the ceramic material includes aluminum oxide and boron nitride.

[0031] The control system includes an excitation source, a laser, a control circuit and an overheat protection circuit. The excitation source is connected to the laser, the laser is connected to the optical fiber 1, the overheat protection circuit is connected to the control circuit, the control circuit is also connected to the excitation source, and the overheat protection circuit is also connected to the first heat-conducting layer 21; the laser outputs laser to the optical fiber 1 to heat the optical fiber 1, thereby heating the first heat-conducting layer 21 and the second heat-conducting layer 22; the overheat protection circuit outputs according to the temperature of the first heat-conducting layer 21, and controls the on-off of the control circuit according to the output of the overheat protection circuit, thereby controlling the on-off of the excitation source, and performing automatic control and overheat protection; the second heat-conducting layer 22 contacts with the tissue, effectively transfers the heat energy converted from light energy to the tissue, heats the tissue to stop bleeding, and has a high thermal conductivity.

[0032] The overheat protection circuit can be one or more of a simple digital circuit and an analog circuit, preferably Figure 3 In the circuit shown in FIG. 1 , the switch circuit in the control circuit is turned on and off by connecting a voltage follower circuit. The specific circuit structure of the voltage follower circuit is as follows: Figure 4 shown.

[0033] like Figure 3 As shown, the overheat protection circuit includes a temperature acquisition circuit and a voltage follower circuit. The temperature acquisition circuit includes a wiring terminal P1, a NOT gate chip U2 and a first resistor R1. The positive electrode of the power supply is connected to the first resistor R1. The end of the first resistor R1 away from the positive electrode of the power supply is connected to a port of the wiring terminal P1. The other port of the wiring terminal P1 is connected to the negative electrode of the power supply. The negative electrode of the power supply is grounded. The wiring terminal P1 is connected in parallel with a NOT gate chip U2. The NOT gate chip U2 is provided with five ports, namely, an NC terminal, an A terminal, a GND terminal, a VCC terminal and a Y terminal. The NC terminal is connected to the first heat-conducting layer 21, the A terminal is connected to the end of the first resistor R1 away from the positive electrode of the power supply, the GND terminal is grounded, the VCC terminal is connected to the positive electrode of another power supply, and the Y terminal outputs a level signal.

[0034] like Figure 4As shown, the voltage follower circuit includes an operational amplifier U1, a transistor Q1, a capacitor C1, a second resistor R2 and a third resistor R3, one end of the second resistor R2 is connected to the positive electrode of the power supply, the end of the second resistor R2 away from the positive electrode of the power supply is connected to the S electrode of the transistor Q1, the D electrode of the transistor Q1 is connected to the inverting input terminal of the operational amplifier U1, the G electrode of the transistor Q1 receives the level signal output by the Y terminal of the temperature acquisition circuit, the non-inverting input terminal of the operational amplifier U1 is grounded, the negative power terminal of the operational amplifier U1 is also grounded, the positive power terminal of the operational amplifier U1 is connected to the positive electrode of the power supply, and the third resistor R3 is connected to the positive power terminal of the operational amplifier U1. The second resistor R2 is connected to the output end of the operational amplifier U1, and the third resistor R3 is connected in series on the line connecting the second resistor R2 and the output end of the operational amplifier U1. An output port T is provided on the line connecting the second resistor R2 and the output end of the operational amplifier U1. The output port T is located between the third resistor R3 and the output end of the operational amplifier U1, and the output port T outputs a voltage. The inverting input end of the operational amplifier U1 is connected to an end of the third resistor R3 away from the second resistor R2, and a capacitor C1 is connected in series on the line connecting the inverting input end of the operational amplifier U1 and an end of the third resistor R3 away from the second resistor R2.

[0035] The resistance values ​​of the first resistor R1 , the second resistor R2 , and the third resistor R3 are set to be the same.

[0036] The first heat-conducting layer 21 is connected to the NOT gate chip U2, and a temperature threshold is set. When the first heat-conducting layer 21 exceeds the temperature threshold, the first heat-conducting layer 21 exhibits good conductor properties, and forms a loop through the power supply, the first resistor R1, and the ground. The NOT gate chip U2 inputs a low-level signal and outputs a high-level signal NET1. The NET1 output by the temperature acquisition circuit enters the voltage follower circuit as an input. The voltage follower circuit generates an output voltage NET2, and NET2 is directly connected to the control circuit through the switch circuit. The switch circuit is disconnected to cut off the power input to the laser, that is, the excitation source is cut off, thereby achieving overheating protection.

[0037] When the first heat conducting layer 21 is only made of coated vanadium dioxide, the temperature threshold is the phase transition temperature of vanadium dioxide, 68°C; the temperature threshold can be adjusted adaptively by doping aluminum and germanium into vanadium dioxide and injecting 1MeV energy to adjust the temperature. The mass doping ratio of vanadium dioxide, aluminum and germanium is set to a:b:c, and a:b:c is specifically obtained by the following method:

[0038] A deep learning model is set. In the deep learning model, the overheat protection circuit is used as a learning model. The mass of vanadium dioxide is a fixed value. The unit doping mass is set. Different amounts of unit doping mass of aluminum and germanium are doped into the vanadium dioxide to form a plurality of first heat-conducting layers 21. Each first heat-conducting layer 21 is connected to the non-gate chip U2. When the temperature acquisition circuit outputs the NET11 signal and the voltage follower circuit outputs the NET12 signal, the mass doping ratio of vanadium dioxide, aluminum and germanium in the corresponding first heat-conducting layer 21 is taken, so that when the temperature acquisition circuit outputs the NET11 signal and the voltage follower circuit outputs the NET12 signal, the temperature value of the first heat-conducting layer 21 is the temperature threshold value under the mass doping ratio of vanadium dioxide, aluminum and germanium; wherein the NET11 signal is the output signal of the temperature acquisition circuit when the first heat-conducting layer 21 is only coated vanadium dioxide and the temperature threshold is 68°C, and the NET12 signal is the output signal of the voltage follower circuit when the first heat-conducting layer 21 is only coated vanadium dioxide and the temperature threshold is 68°C.

[0039] like Figure 1 As shown, the heat-insulating cylinder 3 includes a first cylinder 31 and a second cylinder 32. The first cylinder 31 is sleeved on the outside of the second cylinder 32. The second cylinder 32 is threadedly connected to the first cylinder 31. The optical fiber 1 is connected to the second cylinder 32. The first heat-conducting layer 21 and the second heat-conducting layer 22 are arranged at the end of the optical fiber 1 away from the second cylinder 32. Compared with the first heat-conducting layer 21, the second heat-conducting layer 22 is arranged closer to the end. By rotating the second cylinder 32, the second cylinder 32 can drive the optical fiber 1 to move out of the first cylinder 31 and move into the first cylinder 31.

[0040] The present invention arranges a first heat-conducting layer 21 and a second heat-conducting layer 22 on the outside of the optical fiber 1. The first heat-conducting layer 21 is a coating of vanadium dioxide, which is a phase change material. The volume of the device is not increased, and there is no risk of falling off. The first heat-conducting layer 21 is directly connected to the overheating protection circuit. The property of the relationship between the resistance and temperature change of the phase change material is used to set the temperature threshold. The on-off of the control circuit is controlled by the voltage follower circuit. No signal processing conversion circuit is required. It is directly connected to the excitation source, and the controller is turned on and off to achieve automatic control, thereby effectively stopping bleeding.

[0041] The present invention is provided with a retractable heat-insulating cylinder 3. When performing a hemostatic operation, the optical fiber 1 is screwed out of the first cylinder 31, and the second heat-conducting layer 22 is brought into contact with the tissue to perform a hemostatic operation. After the hemostatic operation is completed, during the removal process, since it takes a certain amount of time for the temperature of the second heat-conducting layer 22 to drop to 0°C, the second heat-conducting layer 22 can be directly screwed into the first cylinder 31. In this way, during the removal process of the present invention, the heat conductor 2 will not contact other tissues, which can avoid contact between other tissues and the heat conductor 2. It can also save the time required to wait for the heat conductor 2 to drop to 0°C, thereby achieving overheating protection and avoiding secondary damage to the tissue after puncture.

[0042] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A hemostatic device capable of real-time temperature control and overheat protection, characterized in that: It comprises an optical fiber, a heat conductor, a heat insulating tube and a control system. The heat insulating tube is movably connected to the optical fiber. The outer wall of one end of the optical fiber is coated with the heat conductor. Both the optical fiber and the heat conductor are connected to the control system. The control system includes an excitation source, a laser, a control circuit and an overheat protection circuit. The excitation source is connected to the laser, the laser is connected to the optical fiber, the optical fiber converts the received laser into heat energy, the optical fiber is used to heat the heat conductor, the heat conductor is connected to the overheat protection circuit, the overheat protection circuit is connected to the control circuit, and the overheat protection circuit controls the control circuit to be turned on and off according to the resistance value of the heat conductor.

2. A hemostatic device capable of real-time temperature control and overheat protection according to claim 1, characterized in that: The heat conductor includes a first heat conducting layer and a second heat conducting layer, the first heat conducting layer is made of vanadium dioxide, the second heat conducting layer is made of metal, alloy or ceramic material, and the first heat conducting layer is connected to the overheat protection circuit.

3. A hemostatic device capable of real-time temperature control and overheat protection according to claim 2, characterized in that: The overheat protection circuit includes a temperature acquisition circuit, which includes a wiring terminal, a NOT gate chip and a first resistor, one end of the first resistor is connected to the positive electrode of the power supply, the other end of the first resistor is connected to a port of the wiring terminal, the other port of the wiring terminal is connected to the negative electrode of the power supply, the negative electrode of the power supply is grounded, the wiring terminal is connected in parallel with the NOT gate chip, the NOT gate chip is provided with five ports, namely, an NC terminal, an A terminal, a GND terminal, a VCC terminal and a Y terminal, the NC terminal is connected to the first heat conductive layer, the A terminal is connected to an end of the first resistor away from the positive electrode of the power supply, the GND terminal is grounded, the VCC terminal is connected to the positive electrode of the power supply, and the Y terminal outputs a level signal.

4. A hemostatic device capable of real-time temperature control and overheat protection according to claim 3, characterized in that: The overheat protection circuit also includes a voltage follower circuit. The control circuit is provided with a switch circuit. The on and off of the switch circuit is controlled according to the voltage output by the voltage follower circuit. The input of the voltage follower circuit is the level signal output by the temperature acquisition circuit.

5. A hemostatic device capable of real-time temperature control and overheat protection according to claim 4, characterized in that: The voltage follower circuit includes an operational amplifier, a field effect transistor, a capacitor, a second resistor and a third resistor, one end of the second resistor is connected to the positive electrode of the power supply, the other end of the second resistor is connected to the D electrode of the field effect transistor, the S electrode of the field effect transistor is connected to the inverting input terminal of the operational amplifier, and the G electrode of the field effect transistor receives the level signal output by the temperature acquisition circuit. The in-phase input terminal and the negative power supply terminal of the operational amplifier are both grounded, and the positive power supply terminal of the operational amplifier is connected to the positive electrode of the power supply; the second resistor is connected to the output terminal of the operational amplifier, and the third resistor is connected in series on the connected line; an output port is provided on the line connecting the second resistor to the output terminal of the operational amplifier, and the output port is located between the third resistor and the output terminal of the operational amplifier, and the output port outputs a voltage; the capacitor is connected in parallel between the inverting input terminal and the output terminal of the operational amplifier.

6. A hemostatic device capable of real-time temperature control and overheat protection according to claim 5, characterized in that: The resistance values ​​of the first resistor, the second resistor, and the third resistor are set to be the same.

7. A hemostatic device capable of real-time temperature control and overheat protection according to claim 5, characterized in that: The control method for the on-off of the switch circuit is: setting a temperature threshold, when the first heat conduction layer reaches the temperature threshold, the overheat protection circuit forms a loop, the NOT gate chip inputs a low-level signal and outputs a high-level signal NET1, the voltage follower circuit inputs NET1 and outputs voltage NET2, and the voltage NET2 controls the switch circuit to disconnect.

8. A hemostatic device capable of real-time temperature control and overheat protection according to claim 7, characterized in that: When the material of the first heat-conducting layer is only vanadium dioxide, the temperature threshold is 68°C; the material of the first heat-conducting layer can also be vanadium dioxide, aluminum, and germanium doped according to the mass ratio a:b:c, and injected with 1MeV energy. The temperature threshold is obtained according to the following method: A deep learning model is set. In the deep learning model, the overheat protection circuit is used as a learning model. The mass of vanadium dioxide is a fixed value. The unit doping mass is set. Different amounts of unit doping mass of aluminum and germanium are doped into the vanadium dioxide to form a variety of first thermal conductive layers. Each first thermal conductive layer is connected to the non-gate chip. When the temperature acquisition circuit outputs the NET11 signal and the voltage follower circuit outputs the NET12 signal, the temperature value of the first thermal conductive layer at this time is taken as the temperature threshold value under the mass doping ratio of the vanadium dioxide, aluminum and germanium; wherein the NET11 signal is the output signal of the temperature acquisition circuit when the material of the first thermal conductive layer is only vanadium dioxide and the temperature threshold is 68°C, and the NET12 signal is the output signal of the voltage follower circuit when the material of the first thermal conductive layer is only vanadium dioxide and the temperature threshold is 68°C.

9. A hemostatic device capable of real-time temperature control and overheat protection according to claim 1, characterized in that: The heat-insulating cylinder comprises a first cylinder and a second cylinder, wherein the first cylinder is sleeved outside the second cylinder, the second cylinder is threadedly connected to the first cylinder, the optical fiber is connected to the second cylinder, and the heat conductor is arranged at the end of the optical fiber away from the second cylinder.

10. A hemostatic device capable of real-time temperature control and overheat protection according to claim 9, characterized in that: The second heat-conducting layer is disposed farther from the second cylinder than the first heat-conducting layer.

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