A temperature measuring device for ablation electrode

Abstract

The present invention relates to the field of medical device technology, and in particular to a temperature measuring device for an ablation electrode. It includes an ablation needle, which is composed of a needle body, a handle, and a cable. The needle body and the cable are arranged on both sides of the handle. The end of the cable away from the handle is connected with a plug for connecting to an external detection device, so as to facilitate timely understanding of the temperature of the ablation operation. The needle body is composed of a needle tip, a needle tube, an insulating film, and a temperature measuring needle, and the needle tip is arranged on one side of the handle. The present invention arranges the temperature measuring needle in the insulating film, and is in a movable connection state and uses an adjusting button to adjust the temperature measuring point of the temperature measuring needle, so that the temperature measuring needle moves synchronously with the ablation component, ensuring that the needle extension path of the thermocouple component in the skin and flesh tissue can be consistent with the design, and in the tissue after ablation, the thermocouple component can be retracted and extended together with the needle body to avoid shredding the tissue.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a temperature measuring device for an ablation electrode. Background Art

[0002] The ablation electrode is an accessory of high-frequency surgical equipment required in high-frequency surgery. It is mainly used in conjunction with high-frequency surgical equipment or suction device products to perform ablation, hemostasis, electroresection, electrocoagulation, attraction and stripping of related tissues during surgery. According to different application fields and design structures, ablation electrodes can be divided into many types, such as radiofrequency ablation electrodes, microwave ablation electrodes, cryoablation electrodes, etc. In addition, according to the number of electrode poles, they can also be divided into monopolar ablation electrodes and bipolar ablation electrodes. The working principle of the ablation electrode is based on the biological effect of tissue necrosis caused by heating. When using the ablation electrode, it is necessary to measure the temperature of the ablation electrode through a temperature measuring device to avoid damage to the surrounding tissues due to excessive temperature and ensure the safety of the ablation electrode operation.

[0003] The temperature measuring device of the current ablation electrode generally uses a thermocouple assembly for temperature detection and transmission. However, when using the thermocouple assembly, the needle extension path in the skin and flesh tissue is difficult to keep consistent with the designed path. In the tissue after ablation, the thermocouple assembly is also difficult to extend and retract and is prone to cutting the tissue, causing trauma to other tissues and reducing the safety of the ablation electrode operation. Summary of the invention

[0004] In view of the problems existing in the background technology, a temperature measuring device for an ablation electrode is proposed.

[0005] The present invention proposes a temperature measuring device for an ablation electrode, comprising an ablation needle, wherein the ablation needle is composed of a needle body, a handle, and a cable. The needle body and the cable are arranged on both sides of the handle. A plug is connected to one end of the cable away from the handle for connecting with an external detection device to provide power for the entire ablation operation and the temperature measurement operation, and to transmit a thermal signal, so as to timely understand the temperature of the ablation operation. The needle body is composed of a needle tip, a needle tube, an insulating film, and a temperature measuring needle. The needle tip is arranged on one side of the handle for releasing current to perform ablation treatment on human tissue. The needle tube is arranged on the handle, and the needle tube is connected to the needle tip to provide a guarantee for the movement of the needle tip driven by the handle. The insulating film is sleeved on the needle tube and is cylindrical. The temperature measuring needle is arranged on the insulating film and is in a movable state for detecting the temperature of the ablation focus when the needle tip is working. The temperature measuring needle is composed of a shell and a thermocouple. The thermocouple is arranged in the shell, and the temperature measuring point of the thermocouple is arranged at the end of the shell. An adjusting button is arranged on the handle, and the adjusting button is connected to the temperature measuring needle. The temperature measuring point of the temperature measuring needle is adjusted by moving the adjusting button.

[0006] Preferably, one side of the needle tip is a stop surface, which provides a limit for the axial movement of the temperature measuring needle.

[0007] Preferably, a button is provided on the adjusting button, a connecting frame is slidably installed on the adjusting button, a reset spring is provided on the adjusting button, and the reset spring is used to restore to the original state after the button is pressed down. A plurality of slots are provided on the handle, and a card block is provided on the connecting frame. The card block is adapted to the card slot to ensure the stable movement of the temperature measuring needle.

[0008] Preferably, when moving the temperature measuring needle, it is necessary to press the button downward to drive the card block out of the card slot, and then the adjustment button can be pushed to move the temperature measuring needle. This can avoid human error that causes the adjustment button to move and drive the temperature measuring needle to move.

[0009] Preferably, the needle tube is formed of a special-shaped tube with a slide groove provided thereon. Through the cooperation of the slide groove and the inner wall of the insulating film, a movement guide groove is provided for the temperature measuring needle, so that the temperature measuring needle can move forward and backward along the axis of the needle body.

[0010] Preferably, the insulating film is provided with a channel, and the channel is set as a straight channel. The channel can provide a movement guide groove for the temperature measuring needle, so that the temperature measuring needle can move forward and backward along the axis of the needle body.

[0011] Preferably, the channel is configured to be spiral, so that the temperature measuring needle moves in a spiral along the insulating film, and different orientations of the insulating film are detected, thereby expanding the temperature measuring range of the temperature measuring needle and achieving the effect of increasing detection accuracy.

[0012] Preferably, the number of the temperature measuring needles can be set to multiple and evenly distributed in a ring shape, and the ends of the multiple temperature measuring needles are arranged in a horizontal stepped manner, thereby being able to simultaneously perform temperature detection at multiple temperature measuring points.

[0013] Preferably, during ablation, energy is conducted outward from the needle tip, a, b, c, d are isotherms, A, B, C, D are temperature measuring points, and different scenes require different sizes of ablation lesions. If the planned ablation boundary is b, the temperature measuring point can be moved to point B, and the temperature of this point can be monitored to see whether it reaches the target temperature, thereby confirming that the ablation lesion has reached the target range. At the same time, by adjusting the position of the temperature measuring needle, the position of the temperature measuring point can be dynamically adjusted to understand the real-time expansion of the ablation lesion.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects:

[0015] The temperature measuring needle is set in the insulating film and is in a movable connection state. The temperature measuring point of the temperature measuring needle is adjusted by an adjusting button, so that the temperature measuring needle and the ablation component move synchronously, ensuring that the needle extension path of the thermocouple component in the skin and flesh tissue can be consistent with the design, and in the ablated tissue, the thermocouple component can be retracted and extended together with the needle body to avoid cutting the tissue. At the same time, the movable state of the temperature measuring needle can be based on different scenarios and the required ablation focus of different sizes to move the temperature measuring point to detect whether the temperature of the point reaches the target temperature, thereby confirming that the ablation focus has reached the target range. At the same time, the outermost temperature of the ablation focus can be monitored to avoid damage to surrounding tissues;

[0016] By setting a spiral channel, the moving track of the temperature measuring needle is made spiral, so that the temperature measuring needle can be tested at different positions of the insulating film, thereby increasing the detection range and improving the accuracy of the detection results;

[0017] By increasing the number of temperature measuring needles and distributing them evenly in a circular pattern on the insulating film, the temperature measuring needles can also be used for detection at different positions of the insulating film, thereby increasing the detection range and the accuracy of the detection results. In addition, when multiple temperature measuring needles are distributed in a circular pattern, they are distributed in a stepped manner in the horizontal direction, thereby measuring multiple temperature measuring points at the same time, thereby ensuring the accuracy of the measurement results.

[0018] By setting the button, the connecting frame, the reset spring, the slot and the block, the adjustment button 8 can be better limited to ensure the stability of the temperature measuring needle's position on the insulating film, thereby ensuring the stability of the temperature measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the three-dimensional cross-sectional structure of the handle in the present invention;

[0021] Figure 3 is a schematic diagram of a three-dimensional cross-sectional structure of the insulating film of the present invention;

[0022] Figure 4 It is a schematic diagram of the side cross-sectional structure of the handle and the adjusting button in the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the needle tube in the present invention;

[0024] Figure 6 It is a schematic diagram of a three-dimensional cross-sectional structure of the insulating film and the needle tube in the present invention;

[0025] Figure 7 Another schematic diagram of a three-dimensional cross-sectional structure of the insulating film of the present invention;

[0026] Figure 8Schematic diagram of the distribution structure of the channels in the present invention;

[0027] Fig. 9 This is a schematic diagram of the needle tip ablation energy diffusion structure of the present invention;

[0028] Fig.10 It is a schematic diagram of the side cross-sectional structure of the needle tube and the insulating film in the present invention;

[0029] Fig.11 It is a schematic diagram of the distribution structure of multiple channels in the present invention;

[0030] Fig.12 It is a structural schematic diagram of the spiral channel in the present invention;

[0031] Fig.13 It is a schematic diagram of the distribution structure of multiple temperature measuring needles in the present invention.

[0032] Figure numerals: 1, needle body; 2, handle; 3, cable; 101, needle tip; 102, needle tube; 103, insulating film; 104, temperature measuring needle; 4, thermocouple; 5, slide groove; 6, channel; 7, stop surface; 8, adjustment button; 9, button; 10, reset spring; 11, connecting frame; 12, slot; 13, block. DETAILED DESCRIPTION

[0033] Embodiment 1

[0034] like Figure 1-Figure 13As shown, the temperature measuring device of an ablation electrode proposed by the present invention comprises: an ablation needle, the ablation needle is composed of a needle body 1, a handle 2, and a cable 3, the needle body 1 and the cable 3 are respectively arranged on both sides of the handle 2, and the end of the cable 3 away from the handle 2 is connected with a plug for connecting with an external detection device, for signal transmission and for providing power to the subsequent needle tip 101, so as to facilitate the needle tip 101 to perform ablation operation on skin and flesh tissue, the needle body 1 is composed of the needle tip 101, the needle tube 102, the insulating film 103 and the temperature measuring needle 104 The needle tip 101 is arranged on one side of the handle 2 and is used to release current to perform ablation treatment on human tissue. One end of the needle tip 101 is set in a needle tip shape to facilitate the ablation of skin and flesh tissue. The needle tube 102 is arranged on the handle 2, and the needle tube 102 is connected to the needle tip 101 to provide a guarantee for the handle 2 to drive the needle tip 101 to move. The insulating film 103 is sleeved on the needle tube 102 and presents a cylindrical shape. The temperature measuring needle 104 is arranged on the insulating film 103 and is in a movable state for detecting the needle tip 104. The temperature of the ablation focus when the tip 101 is working; the temperature measuring needle 104 is composed of a shell and a thermocouple 4, the thermocouple 4 is arranged in the shell, and the temperature measuring point of the thermocouple 4 is arranged at the end of the shell. The thermocouple 4 is a temperature sensing element composed of two different conductors or semiconductors that meet certain requirements. When the two ends of the two conductors are connected to each other and there is a temperature difference, an electromotive force will be generated in the circuit. The direction and magnitude of the electromotive force are related to the material of the conductor and the temperature of the connection point. This phenomenon is called the thermoelectric effect, and the electromotive force generated is called the thermoelectric electromotive force. The thermocouple 4 uses this principle to measure the temperature; an adjusting button 8 is provided on the handle 2, and the adjusting button 8 is connected to the temperature measuring needle 104. The temperature measuring point of the temperature measuring needle 104 is adjusted by moving the adjusting button 8. The end of the temperature measuring needle 104 away from the needle tip 101 is in a relatively tight connection state with the adjusting button 8. The temperature measuring needle 104 is connected to the cable 3 through a signal transmission line. The signal transmission line passes through the adjusting button 8, and the signal transmission line is deformable and will not hinder the movement of the adjusting button 8.

[0035] One side of the needle tip 101 is a stop surface 7, which provides a limit for the axial movement of the temperature measuring needle 104.

[0036] like Figure 3 , Figure 5 and Figure 6 As shown, a needle tube 102 is arranged in the insulating film 103. The needle tube 102 is a special-shaped tube and is connected to the needle tip 101. In the actual production process, the needle tube 102 can be connected to the needle tip 101 in a split manner, and is connected by thread rotation or glue adhesion. This can also facilitate the assembly of the needle tube 102 and the needle tip 101. A slide groove 5 is provided thereon. Through the cooperation of the slide groove 5 and the inner wall of the insulating film 103, a movement guide groove is provided for the temperature measuring needle 104, so that the temperature measuring needle 104 can move forward and backward along the axis of the needle body 1.

[0037] like Figure 1, Figure 2 and Figure 4 As shown, a button 9 is provided on the adjusting button 8, a connecting frame 11 is slidably installed on the adjusting button 8, a reset spring 10 is provided on the adjusting button 8, and the reset spring 10 is used to restore to the initial state after the button 9 is pressed down, a plurality of slots 12 are provided on the handle 2, and a card block 13 is provided on the connecting frame 11, and the card block 13 is adapted to the slot 12 to ensure the stable movement of the temperature measuring needle 104. When moving the temperature measuring needle 104, it is necessary to press the button 9 downward to drive the card block 13 out of the slot 12, and then the adjusting button 8 can be pushed to move and drive the temperature measuring needle 104 to move, so that human errors that cause the adjusting button 8 to move and drive the temperature measuring needle 104 to move can be avoided.

[0038] Embodiment 2

[0039] like Figure 7 and Figure 8 As shown, compared with the first embodiment, the present embodiment does not use the needle tube 102 and the slide groove 5 to provide guidance for the temperature measuring needle 104. The present embodiment adopts a channel 6 opened in the insulating film 103, and the channel 6 is set to be vertical. The channel 6 provides a movement guide groove for the temperature measuring needle 104, so that the temperature measuring needle 104 can move forward and backward along the axis of the needle body 1.

[0040] Embodiment 3

[0041] like Fig.12 As shown, compared with the second embodiment, in this embodiment, the channel 6 is set to a spiral shape, so that the temperature measuring needle 104 moves in a spiral along the insulating film 103, so that the temperature measurement can be performed at different positions of the insulating film 103, thereby increasing the temperature measurement range of the temperature measuring needle 104, avoiding temperature deviation in a certain position, and ensuring the safety of the electrode ablation operation.

[0042] Embodiment 4

[0043] like Fig.10 , Fig.11 and Fig.13 As shown, compared with the second embodiment, the number of the temperature measuring needles 104 in this embodiment is set to multiple, and they are evenly distributed in a ring shape, and the movement of the multiple temperature measuring needles 104 is controlled by the adjustment button 8, and the ends of the multiple temperature measuring needles 104 are arranged in a stepped manner in the horizontal direction, thereby being able to monitor multiple temperature measuring points simultaneously. This method has the same effect as the third embodiment, but can measure multiple temperature measuring points synchronously, further ensuring the safety of the electrode ablation operation.

[0044] In actual use, the multiple temperature measuring needles 104 can all be composed of movable temperature measuring needles, or a combination of movable temperature measuring needles and fixed temperature measuring needles.

[0045] like Fig. 9As shown, during ablation, energy is conducted outward from the needle tip 101. The figure is a cross-sectional view, and a, b, c, and d are isotherms. Different scenes require different sizes of ablation lesions. If the planned ablation boundary is b, the temperature measuring point can be moved to point B. By monitoring whether the temperature at this point reaches the target temperature, it is confirmed that the ablation lesion has reached the target range. In different scenes, the target temperature of the ablation boundary may be different, and real-time detection and control can be achieved as needed. During the ablation process, the position of the temperature measuring point can be dynamically adjusted to detect the real-time expansion of the ablation lesion. If the EE near the target ablation area is an important tissue, it is not allowed to exceed or fall below a certain temperature. In this way, the temperature measuring point can be moved to point D for detection and control.

[0046] In this embodiment, when the ablation electrode is used, the entire device can be first connected to the external monitoring equipment through the cable 3, and then the position of the temperature measuring needle 104 can be adjusted according to the size of the ablation focus of the skin and flesh tissue to be ablated by the ablation electrode. Specifically, the button 9 can be pressed downward to drive the block 13 to disengage from the slot 12 through the connecting frame 11, and then the adjustment button 8 can be pushed to drive the temperature measuring needle 104 to adjust the position. After reaching the temperature measuring point, the button 9 can be released, and under the action of the reset spring 10, the block 13 can be re-entered into the slot 12, so as to achieve the effect of fixing the position of the temperature measuring needle 104. Subsequently, the temperature of the ablation electrode can be measured through the temperature measuring needle 104 to ensure the safety of the ablation operation.

[0047] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A temperature measuring device for an ablation electrode, comprising: An ablation needle, the ablation needle comprising a needle body (1), a handle (2), and a cable (3), the needle body (1) and the cable (3) being arranged on both sides of the handle (2), the end of the cable (3) away from the handle (2) being connected to a plug for connecting to an external detection device, the needle body (1) comprising a needle tip (101), a needle tube (102), an insulating film (103), and a temperature measuring needle (104), the needle tip (101) being arranged on one side of the handle (2) for releasing electric current to perform ablation treatment on human tissue; The needle tube (102) is arranged on the handle (2), and the needle tube (102) is connected to the needle tip (101), so as to provide a guarantee for the handle (2) to drive the needle tip (101) to move; the insulating film (103) is sleeved on the needle tube (102) and presents a cylindrical shape; the temperature measuring needle (104) is arranged on the insulating film (103) and is in a movable state, and is used to detect the temperature of the ablation focus when the needle tip (101) is working; The temperature measuring needle (104) is composed of a shell and a thermocouple (4), the thermocouple (4) is arranged in the shell, and the temperature measuring point of the thermocouple (4) is arranged at the end of the shell; The handle (2) is provided with an adjusting button (8), which is connected to the temperature measuring needle (104), and the temperature measuring point of the temperature measuring needle (104) can be adjusted by moving the adjusting button (8); The invention is characterized in that the insulating film (103) is provided with a channel (6), and the channel (6) is set to be spiral, so that the temperature measuring needle (104) moves along the insulating film (103) in a spiral motion, and different orientations of the insulating film (103) are detected, thereby increasing the temperature measurement range of the temperature measuring needle (104) and achieving the effect of increasing the detection accuracy.

2. The temperature measuring device for an ablation electrode according to claim 1, characterized in that: One side of the needle tip (101) is a stop surface (7) which provides a limit for the axial movement of the temperature measuring needle (104).

3. The temperature measuring device for an ablation electrode according to claim 1, characterized in that: The adjusting button (8) is provided with a button (9), a connecting frame (11) is slidably mounted on the adjusting button (8), a reset spring (10) is provided on the adjusting button (8), and the reset spring (10) is used to restore the temperature to an initial state after the button (9) is pressed down. The handle (2) is provided with a plurality of slots (12), and a card block (13) is provided on the connecting frame (11). The card block (13) is adapted to the slot (12) and is used to ensure the stable movement of the temperature measuring needle (104).

4. The temperature measuring device for an ablation electrode according to claim 3, characterized in that: When the temperature measuring needle (104) is moved, the button (9) needs to be pressed downward to drive the card block (13) out of the card slot (12), and then the adjustment button (8) can be pushed to move the temperature measuring needle (104). This can prevent human error from causing the adjustment button (8) to move and drive the temperature measuring needle (104) to move.

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