Electromagnetic induction targeted heating needle system

Abstract

The electromagnetic induction targeted heating needle system comprises an electromagnetic induction coil, an electromagnetic induction heating needle, a temperature controller and a high-frequency power supply, a plurality of electromagnetic induction heating needles are arranged, the electromagnetic induction coil is connected with the high-frequency power supply, and the electromagnetic induction heating needles are located in the electromagnetic induction coil; the electromagnetic induction heating needle is composed of a magnetic conductive heating material, a non-magnetic conductive thermocouple and a non-magnetic conductive needle tube; the magnetic conductive heating material is located at the head end in the non-magnetic conductive needle tube, the non-magnetic conductive thermocouple is located in the non-magnetic conductive needle tube, the head of the non-magnetic conductive thermocouple is in close contact with the magnetic conductive heating material, and the lead is led out from the tail of the needle tube. The heating mode that the eddy current effect is generated through high-frequency electromagnetic induction is utilized, the heating length is equal to the length of the magnetic conduction heating material, the heating range is equal to the diameter of the needle tube, targeted precise heating is achieved, and the problem that only cancer cells are heated, but normal cells are not heated is solved.

Description

Technical Field

[0001] The invention discloses a heating probe, belongs to the technical field of medical devices, and specifically relates to an electromagnetic induction targeted heating needle system. Background Art

[0002] Cancer cells can be killed by high temperatures, which usually means that at temperatures above 42 degrees, the growth of cancer cells is inhibited or even killed through ablation surgery. The traditional technology is to use an ablation needle for heating. The ablation needle is a commonly used consumable in ablation surgery and is often used clinically as an auxiliary treatment for various benign and malignant tumors, cysts, hemangiomas and other diseases. Its main function is to destroy local tissues through high temperatures and achieve the purpose of inactivation.

[0003] When performing ablation surgery, an ablation needle is usually required, and the tip of the ablation needle is equipped with an electrode. When the doctor inserts the ablation needle into the lesion, the temperature can be controlled by adjusting the current intensity, and the changes in the lesion can be monitored in real time. However, excessive temperature can also damage normal cells. At the same time, traditional ablation technology has the problems of low accuracy and uncontrollable heating area. Therefore, it becomes very necessary to heat the tumor precisely. Summary of the invention

[0004] Purpose of the invention: To provide an electromagnetic induction targeted heating needle system to solve the above-mentioned problems.

[0005] Technical solution: An electromagnetic induction targeted heating needle system, the heating needle system comprising: an electromagnetic induction coil, an electromagnetic induction heating needle, a temperature controller and a high-frequency power supply;

[0006] The electromagnetic induction heating needles are provided with a plurality of them, the electromagnetic induction coil is connected to the high-frequency power supply, and the electromagnetic induction heating needles are located in the electromagnetic induction coil;

[0007] The electromagnetic induction heating needle is composed of a magnetic heating material, a non-magnetic thermocouple and a non-magnetic needle tube; the magnetic heating material is located at the head end of the non-magnetic needle tube, and the non-magnetic thermocouple is inserted into the non-magnetic needle tube.

[0008] In a further embodiment, the magnetic heating material is composed of a magnetic heating wire, the magnetic heating wire is placed in the non-magnetic needle tube, the head of the non-magnetic thermocouple is in close contact with the magnetic heating material, and the lead wire comes out from the tail.

[0009] In a further embodiment, the magnetic conductive heating material is composed of a magnetic conductive heating layer, and the magnetic conductive heating layer is coated on the surface of the non-magnetic conductive needle tube head.

[0010] In a further embodiment, the electromagnetic induction coil is connected to the high-frequency power supply via a lead, and the high-frequency power supply applies voltage to both ends of the electromagnetic induction coil to generate an electromagnetic field in the coil. When the applied voltage is a high-frequency alternating voltage, an alternating electromagnetic field is generated in the coil.

[0011] In a further embodiment, the electromagnetic induction heating needle is placed in the electromagnetic induction coil, and the high-frequency power supply applies a high-frequency voltage to the coil. The magnetic heating material in the electromagnetic induction heating needle will generate eddy currents and be heated, and the non-magnetic thermocouple and the non-magnetic needle tube will not be heated.

[0012] In a further embodiment, the electromagnetic induction heating needle is externally connected to a temperature controller, the magnetic heating material generates heat and transfers heat to the non-magnetic thermocouple, the non-magnetic thermocouple is connected to a temperature controller, and the temperature controller displays the temperature and controls the switch of the high-frequency power supply.

[0013] In a further embodiment, the axial length of the heating position is controlled by the length of the magnetic conductive heating material, and the range of the heating position is controlled by the diameter of the electromagnetic induction heating needle and the number of needle tubes.

[0014] Beneficial effects: The present invention utilizes high-frequency electromagnetic induction to generate a heating method that produces an "eddy current" effect, which solves the problem of heating only cancer cells and tumors while not heating normal cells. The electromagnetic induction heating needle is placed in a coil, and then a high-frequency power supply applies a high-frequency voltage to the coil. At this time, the magnetic heating wire in the heating needle will generate an "eddy current" and be heated, while the other parts are non-magnetic materials and will not be heated. The magnetic heating wire generates heat and transfers heat to the thermocouple, which is connected to a temperature controller. The temperature controller displays the temperature and controls the switch of the high-frequency power supply, thereby achieving the effect of controlling the temperature, avoiding excessively high temperatures that damage normal cell tissues, and preventing too low temperatures from inhibiting and killing cancer cells. The present invention can achieve efficient and accurate killing or inhibition of cancer cells and better protection of normal cell tissues outside the edge of the tumor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the heating needle system of the present invention.

[0016] Figure 2 It is a schematic diagram of the electromagnetic induction coil of the present invention.

[0017] Figure 3 It is a schematic diagram of the cooperation between the electromagnetic induction coil and the electromagnetic induction heating needle of the present invention.

[0018] Figure 4 It is a schematic diagram of the electromagnetic induction heating needle of the present invention.

[0019] Figure 5 It is a working schematic diagram of the present invention DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] An electromagnetic induction targeted heating needle system, comprising: an electromagnetic induction coil, an electromagnetic induction heating needle, a temperature controller and a high-frequency power supply;

[0022] The electromagnetic induction heating needles are provided with a plurality of them, the electromagnetic induction coil is connected to the high-frequency power supply, and the electromagnetic induction heating needles are located in the electromagnetic induction coil;

[0023] The electromagnetic induction heating needle is composed of a magnetic heating material, a non-magnetic thermocouple and a non-magnetic needle tube; the magnetic heating material is located at the head end of the non-magnetic needle tube, the non-magnetic thermocouple is inserted into the non-magnetic needle tube, the head of the non-magnetic thermocouple is in close contact with the magnetic heating material, and the lead wire comes out from the tail.

[0024] In one embodiment, Figures 1 to 5 As shown, the magnetic heating material is composed of a magnetic heating wire, and the magnetic heating wire is placed in the head of the non-magnetic needle tube.

[0025] In one embodiment, Figures 1 to 5 As shown, the magnetic conductive heating material is composed of a magnetic conductive heating layer, and the magnetic conductive heating layer is coated on the surface of the non-magnetic conductive needle tube head.

[0026] In one embodiment, Figures 1 to 5 As shown, the electromagnetic induction coil is connected to the high-frequency power supply through a lead wire, and the high-frequency power supply applies voltage to both ends of the electromagnetic induction coil, generating an electromagnetic field in the coil. When the applied voltage is a high-frequency alternating voltage, an alternating electromagnetic field is generated in the coil.

[0027] In one embodiment, Figures 1 to 5 As shown, the electromagnetic induction heating needle is placed in the electromagnetic induction coil, and the high-frequency power supply applies a high-frequency voltage to the coil. The magnetic heating material in the electromagnetic induction heating needle will generate eddy currents and be heated, and the non-magnetic thermocouple and the non-magnetic needle tube will not be heated.

[0028] In one embodiment, Figures 1 to 5 As shown, the electromagnetic induction heating needle is externally connected to a temperature controller, the magnetic heating material generates heat and transfers heat to the non-magnetic thermocouple, the non-magnetic thermocouple is connected to a temperature controller, and the temperature controller displays the temperature and controls the switch of the high-frequency power supply.

[0029] In one embodiment, Figures 1 to 5 As shown, the axial length of the heating position is controlled by the length of the magnetic conductive heating material, and the range of the heating position is controlled by the diameter of the electromagnetic induction heating needle and the number of needle tubes.

[0030] In one embodiment, Figures 1 to 5 As shown, the magnetic heating material is made of one of ferrous materials, pure iron, ferrosilicon, and low-carbon steel, and the non-magnetic thermocouple and the non-magnetic needle tube are made of one of insulators, non-ferrous metals, stainless steel, nickel-chromium alloy, and nickel-silicon alloy.

[0031] In one embodiment, Figures 1 to 5 As shown, the minimum diameter of the heating needle of the present invention is 0.3 mm.

[0032] Working principle: Figures 1 to 5 As shown, when voltage is applied at both ends of a coil, an electromagnetic field will be generated in the coil. When the applied voltage is an alternating voltage of high frequency (tens of khz eddy current-hundreds of khz), an alternating electromagnetic field will be generated in the coil. At this time, a magnetic metal material (ferrous material, pure iron, ferrosilicon, low-carbon steel, etc.) is inserted into the coil, and the magnetic material will generate "eddy current" and be heated. If a non-magnetic material (insulator, non-ferrous metal, stainless steel, nickel-chromium alloy, nickel-silicon alloy, etc.) is placed in the coil, these non-magnetic materials will not be heated because they will not produce "eddy current" effect inside. Put the electromagnetic heating needle into the coil, and then apply high-frequency voltage to the coil by a high-frequency power supply. At this time, the magnetic heating wire in the heating needle will generate "eddy current" and be heated, and the other parts are non-magnetic materials and will not be heated. The magnetic heating wire generates heat and transfers the heat to the thermocouple, which is then connected to a temperature controller. The temperature controller displays the temperature and controls the switch of the high-frequency power supply, thereby achieving the effect of controlling the temperature, avoiding damage to normal cell tissues due to excessively high temperature, and preventing cancer cells from being inhibited and killed due to too low a temperature.

[0033] The heating needle tube determines the length of the magnetic heating wire according to the size of the tumor, and the length of the magnetic heating wire determines the size of the heating area. For relatively large tumor masses, multiple needles with different heating lengths can be inserted. Magnetic heating wires with different magnetic permeabilities can also be used to achieve different heating temperatures. A heating wire needle with high magnetic permeability is used in the center of the tumor, and a needle with low magnetic permeability is used at the edge of the tumor. This can achieve a high temperature in the center of the tumor and a low temperature at the edge. In this way, cancer cells can be killed or inhibited efficiently and accurately, and normal cell tissues outside the edge of the tumor can be better protected.

[0034] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An electromagnetic induction targeted heating needle system, characterized in that: The heating needle system comprises: an electromagnetic induction coil, an electromagnetic induction heating needle, a temperature controller and a high-frequency power supply; The electromagnetic induction heating needles are provided with a plurality of them, the electromagnetic induction coil is connected to the high-frequency power supply, and the electromagnetic induction heating needles are located in the electromagnetic induction coil; The electromagnetic induction heating needle is composed of a magnetic heating material, a non-magnetic thermocouple and a non-magnetic needle tube; the magnetic heating material is located at the head end of the non-magnetic needle tube, and the non-magnetic thermocouple is inserted into the non-magnetic needle tube.

2. The electromagnetic induction targeted heating needle system according to claim 1, characterized in that: The magnetic conductive heating material is composed of a magnetic conductive heating wire, and the magnetic conductive heating wire is placed in the head of the non-magnetic conductive needle tube.

3. The electromagnetic induction targeted heating needle system according to claim 1, characterized in that: The magnetic conductive heating material is composed of a magnetic conductive heating layer, and the magnetic conductive heating layer is coated on the surface of the head of the non-magnetic conductive needle tube.

4. The electromagnetic induction targeted heating needle system according to claim 1, characterized in that: The electromagnetic induction coil is connected to the high-frequency power supply through a lead wire. The high-frequency power supply applies voltage to both ends of the electromagnetic induction coil to generate an electromagnetic field in the coil. When the applied voltage is a high-frequency alternating voltage, an alternating electromagnetic field is generated in the coil.

5. The electromagnetic induction targeted heating needle system according to claim 4, characterized in that: The electromagnetic induction heating needle is placed in the electromagnetic induction coil, and the high-frequency power supply applies a high-frequency voltage to the coil. The magnetic heating material in the electromagnetic induction heating needle will generate eddy currents and be heated, while the non-magnetic thermocouple and the non-magnetic needle tube will not be heated.

6. The electromagnetic induction targeted heating needle system according to claim 5, characterized in that: The electromagnetic induction heating needle is externally connected to a temperature controller, the magnetic heating material generates heat and transfers the heat to the non-magnetic thermocouple, the non-magnetic thermocouple is connected to a temperature controller, and the temperature controller displays the temperature and controls the switch of the high-frequency power supply.

7. The electromagnetic induction targeted heating needle system according to claim 5, characterized in that: The axial length of the heating position is controlled by the length of the magnetic conductive heating material, and the range of the heating position is controlled by the diameter of the electromagnetic induction heating needle and the number of needle tubes.

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