A microwave ablation needle with optical fiber temperature measurement

Abstract

The present invention discloses a microwave ablation needle with optical fiber temperature measurement, which relates to the medical field and includes a needle body for providing microwave energy and a temperature measuring component arranged on the needle body, wherein the temperature measuring component has a first position for being received inside the needle body and a second position for extending outside the needle body to measure the temperature of tumor tissue. The present invention provides a microwave ablation needle with optical fiber temperature measurement, wherein a temperature measuring component is arranged on the needle body, and the temperature measuring component has a first position for being received inside the needle body and a second position for extending outside the needle body to measure the temperature of tumor tissue. When puncturing, the temperature measuring component is located at the first position of the needle body to avoid interference between the temperature measuring component and human tissue during puncture. After puncturing into the tumor tissue, the temperature measuring component is switched from the first position to the second position so that the temperature measuring component extends into the tumor tissue to improve the accuracy of temperature measurement.

Description

Technical Field

[0001] The present invention relates to the medical field, and in particular to a microwave ablation needle with optical fiber temperature measurement. Background Art

[0002] As is known, microwave ablation is to apply microwaves, a high-frequency electromagnetic wave, to human tumor tissue, and use microwave ablation needles to release microwave energy to tumor tissue. Polar molecules (mostly water) in tumor tissue rotate at high speed under the action of the microwave field and quickly generate a large amount of heat. When the temperature rises to above 60°C, it causes tissue dehydration, coagulation, and protein denaturation, leading to irreversible necrosis, achieving the purpose of treatment. The temperature measuring needle is an important accessory for microwave ablation surgery. Its main purpose is to test the changes in tissue temperature during microwave ablation and provide doctors with reliability feedback. The specific method of using the temperature measuring needle is to insert the temperature measuring needle in parallel with the ablation needle under ultrasound guidance at a distance of 1 cm during the operation to test the temperature changes of the tumor tissue and provide a basis for the ablation process of the tissue. However, when using a thermometer needle to test the temperature of ablated tissue, it is necessary to insert a thermometer needle with a diameter of about 1.6 mm into the human body. Therefore, during the ablation operation, the patient's body not only needs to insert the ablation needle to inactivate the tumor, but also needs to insert the thermometer needle to measure the temperature of the tumor tissue. This brings puncture pain to the patient, and there is a puncture hole after the operation, which increases unnecessary puncture damage in minimally invasive surgery and also increases the difficulty of surgical operation.

[0003] For example, the Chinese patent document with publication number CN112274245A, publication date 2021-01-29, and name "A kind of ablation needle with magnetic positioning navigation and temperature measurement", includes an ablation needle, a sensor module, an ablation needle body and a handle. The ablation needle includes an ablation needle tip at the front end and a sensor inside the needle tip. The sensor includes a magnetic positioning sensor and a thermocouple sensor. The thermocouple sensor is welded together through two temperature measurement signal lines as a temperature measurement point. The part of one of the two temperature measurement signal lines close to the temperature measurement point is wound into a magnetic positioning sensor coil. Compared with the prior art, a cylindrical hole is opened at the bottom of the needle tip, and the temperature measurement sensor and the magnetic positioning sensor coil are combined into one, and fixed to the ablation needle tip by a thermal conductive potting glue, which ensures both the temperature measurement accuracy and the magnetic positioning accuracy. In addition, the complexity of the overall layout of the cables inside the needle body is reduced, and the production difficulty and production cost are reduced.

[0004] Although the above-mentioned prior art solves the problem of secondary puncture by disposing the temperature measuring component inside the ablation needle, since the temperature measuring component is disposed inside the ablation needle, it measures the temperature inside the ablation needle rather than the temperature inside the tumor tissue. This causes a temperature difference between the temperature measured by the temperature measuring component and the actual temperature of the tumor tissue, thereby affecting the accurate monitoring of the temperature. Summary of the invention

[0005] The purpose of the present invention is to provide a microwave ablation needle with optical fiber temperature measurement to solve the above-mentioned shortcomings in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A microwave ablation needle with optical fiber temperature measurement includes a needle body for providing microwave energy and a temperature measurement component arranged on the needle body. The temperature measurement component has a first position stored in the needle body and a second position for extending out of the needle body to measure the temperature of tumor tissue.

[0008] In the above-mentioned microwave ablation needle with optical fiber temperature measurement, the temperature measurement component is at least one of an optical fiber grating sensor, an optical fiber fluorescence sensor and an interferometric optical fiber sensor.

[0009] The above-mentioned microwave ablation needle with optical fiber temperature measurement, the needle body is one of metal materials, inorganic non-metallic materials, polymer materials and composite materials.

[0010] In the above-mentioned microwave ablation needle with optical fiber temperature measurement, the temperature measurement component is slidably arranged on the needle body, and also includes a power component for driving the temperature measurement component to switch between the first position and the second position.

[0011] The above-mentioned microwave ablation needle with optical fiber temperature measurement, the power component includes a driving rod, a slide groove compatible with the driving rod is opened inside the needle body, the driving rod is slidably connected to the slide groove, a fixed block is arranged on the inner wall of the slide groove, a first elastic member is arranged between the fixed block and the temperature measuring component, and the first elastic member is located on the movement stroke of the driving rod.

[0012] In the above-mentioned microwave ablation needle with optical fiber temperature measurement, a connecting portion is provided on the driving rod, a needle seat is provided on the needle body, and a spring is provided between the connecting portion and the needle seat.

[0013] The above-mentioned microwave ablation needle with optical fiber temperature measurement, the needle body includes a first section and a second section that are slidably connected to each other, and a locking piece is provided between the first section and the second section to prevent the two sections from sliding relative to each other.

[0014] In the above-mentioned microwave ablation needle with optical fiber temperature measurement, the locking member includes a blocking block, a receiving groove is opened on the inner wall of the second section, a second elastic member is fixedly connected to the side wall of the receiving groove, and the blocking block is fixedly connected to the second elastic member.

[0015] In the above-mentioned microwave ablation needle with optical fiber temperature measurement, the blocking block is slidably connected to the second section.

[0016] In the above-mentioned microwave ablation needle with optical fiber temperature measurement, an unlocking rod is slidably arranged on the first section, an abutment portion is arranged on the unlocking rod, the abutment portion is located on the movement stroke of the driving rod, and the second elastic member is located on the movement stroke of the unlocking rod.

[0017] In the above technical scheme, the present invention provides a microwave ablation needle with optical fiber temperature measurement, in which a temperature measuring component is arranged on the needle body, and the temperature measuring component has a first position for being stored inside the needle body and a second position for extending outside the needle body to measure the temperature of tumor tissue. When puncturing, the temperature measuring component is located at the first position of the needle body to avoid interference between the temperature measuring component and human tissue during puncture. After puncturing into the tumor tissue, the temperature measuring component is switched from the first position to the second position so that the temperature measuring component extends into the tumor tissue, thereby measuring the actual temperature inside the tumor tissue to improve the accuracy of temperature measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the external needle structure provided by an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the overall external structure from another perspective provided by an embodiment of the present invention;

[0021] Figure 3 A front view schematic diagram of the structure provided by another embodiment of the present invention;

[0022] Figure 4 A side structural schematic diagram provided for yet another embodiment of the present invention;

[0023] Figure 5 for Figure 4 A schematic diagram of the partial cross-sectional structure at aa in the middle;

[0024] Figure 6 for Figure 4 Schematic diagram of partial cross-section structure at bb in the middle;

[0025] Figure 7 for Figure 5 A is an enlarged schematic diagram of the local structure at center A;

[0026] Figure 8 for Figure 6 A magnified schematic diagram of the local structure at B in the middle;

[0027] Fig. 9 A schematic diagram of a mobile ablation process is provided for yet another embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 1. needle body; 101. first section; 102. second section; 2. temperature measuring component; 3. microwave sending component; 4. first through hole; 5. driving rod; 6. slide groove; 7. fixing block; 8. first elastic member; 9. connecting part; 10. needle seat; 11. spring; 12. blocking block; 13. accommodating groove; 14. second elastic member; 15. unlocking rod; 16. abutting part; 17. push rod; 18. transmission block; 19. third elastic member; 20. sealing cavity; 21. sealing plate; 22. second through hole. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] In the description of the present invention, it is to be understood that Figure 5 The first section 101 is on the left relative to the second section 102, and vice versa. Terms such as "center", "left", "right", "inside", "outside", "axial", "radial", and "circumferential" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0032] Reference Figure 1-9 A microwave ablation needle with optical fiber temperature measurement provided in an embodiment of the present invention includes a needle body 1 for providing microwave energy and a temperature measuring component 2 arranged on the needle body 1, wherein the temperature measuring component 2 has a first position for being received inside the needle body 1 and a second position for extending outside the needle body 1 to measure the temperature of tumor tissue.

[0033] Specifically, a sharp end is provided on the needle body 1, and a microwave transmitting component 3 is provided near the sharp end. The sharp end of the needle body 1 is inserted into the tumor tissue (hereinafter referred to as tumor), and then the microwave transmitting component 3 acts on the human tumor with microwaves, a high-frequency electromagnetic wave. The polar molecules (mostly water) in the tumor rotate at high speed under the action of the microwave field and quickly generate a large amount of heat. When the temperature rises to above 60°C, it will cause tissue dehydration, coagulation and protein denaturation, leading to irreversible necrosis, so as to achieve the purpose of treatment. During the treatment, a temperature measuring needle is inserted parallel to the needle body 1 at a position of about 1 cm to measure the temperature inside the tumor. According to the measured temperature, the release amount of microwaves is controlled in real time. However, the disadvantage of using a temperature measuring needle is that, on the one hand, a second puncture is required, thereby increasing the puncture damage of the operation. On the other hand, the temperature measured by the temperature measuring needle is generally the edge temperature, and the real temperature of the center of the tumor cannot be tested. This is the prior art and will not be elaborated on. One of the core innovations of the embodiment of the present invention is that the temperature measuring component 2 is arranged in the needle body 1, and the temperature measuring component 2 has a first position for being received in the needle body 1 and a second position for extending out of the needle body 1 to measure the temperature of the tumor. The temperature measuring component 2 can be an existing temperature sensor. The temperature measuring component 2 is located inside the needle body 1 and close to the sharp end of the needle body 1. The advantage of such an arrangement is that when puncturing, the needle body 1 is punctured into the tumor, and the temperature measuring component 2 is synchronously transported to the tumor during this process, so that there is no need for a second puncture. During the puncture process, the temperature measuring component 2 is in the first position to avoid interference between the temperature measuring component 2 and human tissue during the puncture process. After puncturing into the tumor, the temperature measuring component 2 is switched from the first position to the second position, so that the temperature measuring component 2 extends into the tumor, thereby measuring the actual temperature inside the tumor, so as to improve the accuracy of temperature measurement.

[0034] Preferably, the temperature measuring component 2 is at least one of a fiber grating sensor, a fiber fluorescence sensor and an interferometric fiber sensor, that is, a single sensor may be arranged in the needle body 1, or a plurality of sensors may be arranged in the needle body 1.

[0035] A method for making a fluorescent optical fiber sensor according to an embodiment of the present invention is as follows: 1. Making fluorescent powder: weigh aluminum oxide (Al2O3), yttrium oxide (Y2O3), cerium oxide (CeO2), praseodymium oxide (Pr2O3), gallium oxide (Ga2O3) and lanthanum oxide (La2O3), add a small amount of flux, and perform ball milling to mix. Sinter at a high temperature of 1200-1600°C for 8-12 hours to improve the luminous performance of the fluorescent powder; 2. Filling with fluorescent powder: mix the fluorescent powder with acrylic resin to form a viscous paste, evenly apply about 1 cm of the length on the surface of one end of the optical fiber, dry at 50-100°C, and take out for 20 minutes. 3. Coat one end of the optical fiber with fluorescent powder, and connect the other end to a temperature receiver through a connector to form an optical fiber temperature measuring device.

[0036] Preferably, the needle body 1 is made of one of metal materials, inorganic non-metallic materials, polymer materials and composite materials.

[0037] As a preferred embodiment of the present invention, the temperature measuring component 2 is slidably arranged on the needle body 1, and also includes a power component for driving the temperature measuring component 2 to switch between the first position and the second position. Specifically, there are preferably two temperature measuring components 2, and the needle body 1 has two first through holes 4 symmetrically arranged along the radial direction. The two temperature measuring components 2 are respectively slidably connected to the two first through holes 4, and the power component can be an existing reciprocating drive component. The effect of such a setting is that when the needle body 1 is puncturing, the temperature measuring component 2 is located in the first position, that is, the end of the temperature measuring component 2 will not extend out of the first through hole 4, thereby reducing the resistance of the needle body 1 during puncture. When the needle body 1 punctures into the tumor, the power component is started, and the power component drives the temperature measuring component 2 to slide along the first through hole 4 in a direction away from the central axis of the needle body 1, so that the temperature measuring component 2 extends out of the needle body 1 and is inserted into the tumor, so that the actual temperature inside the tumor can be directly measured. After ablation is completed, the temperature measuring component 2 is controlled by the power component to switch from the second position to the first position, so as to facilitate the removal of the needle body 1.

[0038] Preferably, the power assembly includes a driving rod 5, a slide groove 6 adapted to the driving rod 5 is provided inside the needle body 1, the driving rod 5 is slidably connected to the slide groove 6, a fixing block 7 is provided on the inner wall of the slide groove 6, a first elastic member 8 is provided between the fixing block 7 and the temperature measuring assembly 2, and the first elastic member 8 is located on the movement stroke of the driving rod 5. Specifically, the driving rod 5 is coaxially arranged with the needle body 1, and the driving rod 5 is slidably and sealedly connected with the open end of the slide groove 6, the first elastic member 8 is preferably a metal spring, which has the ability to self-recover after being deformed by an applied force, for a single temperature measuring assembly 2, there are two fixing blocks 7 and two first elastic members 8, and the two fixing blocks 7 are symmetrically arranged on both sides of the temperature measuring assembly 2, and the two first elastic members 8 are respectively located on both sides of the temperature measuring assembly 2 and between the two fixing blocks 7, in a natural state, the first elastic member 8 is arc-shaped and bends in the direction of the central axis of the needle body 1, and the effect of such an arrangement is that, after the needle body 1 is inserted into the tumor, a force is provided to the driving rod 5 in the direction of the first elastic member 8, so that The end of the driving rod 5 is brought into contact with the first elastic member 8, so that the first elastic member 8 moves in a direction away from the central axis of the needle body 1, thereby driving the temperature measuring component 2 to move synchronously, and accumulating force on the first elastic member 8, so that the temperature measuring component 2 extends from the first through hole 4 and is inserted into the tumor, so that the temperature measuring component 2 is switched from the first position to the second position. At this time, the measured temperature is the actual temperature inside the tumor, so as to improve the temperature accuracy. After the temperature measurement is completed, the driving rod 5 is controlled to move in the opposite direction. When the driving rod 5 is away from the first elastic member 8, the elastic force of the first elastic member 8 is released, thereby driving the temperature measuring component 2 to switch from the second position to the first position, so as to complete the automatic resetting of the temperature measuring component 2.

[0039] Further, the driving rod 5 is provided with a connecting portion 9, the needle body 1 is provided with a needle seat 10, and a spring 11 is provided between the connecting portion 9 and the needle seat 10. Specifically, the connecting portion 9 is fixedly connected to the end of the driving rod 5 away from the sharp end of the needle body 1, and the spring 11 is sleeved on the outside of the driving rod 5, one end of which is fixedly connected to the needle seat 10, and the other end is fixedly connected to the connecting portion 9. The radial dimension of the connecting portion 9 is larger than the radial dimension of the driving rod 5. On the one hand, it is convenient to apply force to the driving rod 5 through the connecting portion 9, and on the other hand, it is convenient to install the spring 11. The effect of such a setting is that when the spring 11 is in a natural state, the driving rod 5 is away from the first elastic member 8, and under the action of the elastic force of the spring 11, the position of the driving rod 5 can be flexibly fixed, thereby preventing the driving rod 5 from sliding freely inside the slide groove 6. When the driving rod 5 moves toward the direction of the first elastic member 8, the spring 11 will be charged. When the temperature measurement is completed, the force applied to the driving rod 5 is cancelled, and the driving rod 5 is automatically reset under the action of the elastic force of the spring 11.

[0040] like Fig. 9As shown (the elliptical part in the figure is the tumor), when the tumor is large, similar to an ellipsoidal tumor, when the microwave sending component 3 is fixed in a certain position, it is impossible to completely radiate the entire tumor. Therefore, the position of the microwave sending component 3 needs to be adjusted during ablation. The traditional adjustment method is to insert the sharp end of the needle body 1 into the end of the tumor away from the skin, and then pull the entire needle body 1 out of the body to adjust the position of the microwave sending component 3 to achieve the purpose of comprehensive ablation. However, during the whole process, it is necessary to control the movement of multiple components such as the needle body 1 and the needle seat 10, which undoubtedly increases the difficulty of the operation. As another embodiment of the present invention, the needle body 1 includes a first section 101 and a second section 102 that are slidably connected to each other, and a locking member is provided between the first section 101 and the second section 102 to prevent the two from sliding relative to each other. Specifically, the sharp end and the microwave transmitting component 3 are arranged on the first section 101, the needle seat 10 is fixedly connected to the second section 102, and the second section 102 is a cylindrical structure, which is sleeved on the outside of the first section 101, and a limiting structure (not shown in the figure) is arranged between the first section 101 and the second section 102 to prevent the relative rotation between the two and prevent the two from separating from each other. The locking member can be an existing locking structure such as a latch. The purpose of such a setting is that when puncture is performed, the first section 101 and the second section 102 can be prevented from sliding relative to each other under the action of the locking member, thereby facilitating the puncture of the needle body 1, and then the sharp end on the first section 101 is inserted into the end of the tumor away from the body (such as Fig. 9 As shown in the figure on the left side of the figure), when the position of the microwave transmitting component 3 needs to be adjusted, the locking effect of the locking piece is released so that the first section 101 and the second section 102 can slide relative to each other. The advantages brought by this are that, firstly, at this time, only the first section 101 needs to be pulled to drive the microwave transmitting component 3 to move, so as to adjust the position of the microwave transmitting component 3 (such as Fig. 9 Second, when the first section 101 slides toward the inside of the second section 102, the edge of the second section 102 will rub against the outer peripheral surface of the first section 101, thereby scraping off the tissue attached to the outer peripheral surface of the first section 101, thereby achieving a self-cleaning effect on the outer peripheral surface of the first section 101.

[0041] As an alternative to the above-mentioned bolt fixing the positions of the first section 101 and the second section 102, preferably, the locking member includes a blocking block 12, a receiving groove 13 is provided on the inner wall of the second section 102, a second elastic member 14 is fixedly connected to the side wall of the receiving groove 13, and the blocking block 12 is fixedly connected to the second elastic member 14. Specifically, the second elastic member 14 is also preferably a metal spring, which has the ability to self-recover after being deformed by an applied force, and is an arc-shaped sheet structure, one end of which is fixedly connected to the side wall of the receiving groove 13, and the other end is close to the first section 101, and the blocking block 12 is fixedly connected to the end. The effect of such a setting is that the end of the first section 101 located inside the second section 102 will be blocked by the limiting structure, and the other end of the first section 101 will be blocked by the structure of the second elastic member 14 and the blocking block 12, so that the position of the first section 101 can be flexibly fixed.

[0042] Furthermore, an unlocking rod 15 is slidably provided on the first section 101, and an abutment portion 16 is provided on the unlocking rod 15. The abutment portion 16 is located on the movement stroke of the driving rod 5, and the second elastic member 14 is located on the movement stroke of the unlocking rod 15. Specifically, there are two unlocking rods 15, and both are L-shaped, with their long sides slidingly provided inside the first section 101, and their short sides located inside the second section 102 and on one side of the second elastic member 14. The abutment portion 16 is located in the middle of the two unlocking rods 15, and is used to connect the two unlocking rods 15. A sealing cavity 20 adapted to the abutment portion 16 is provided on the first section 101, and the interior of the sealing cavity 20 is filled with gas, and the sealing cavity 20 is slidably sealed and connected with the abutment portion 16. The effect of such a setting is that when the driving rod 5 has completed the abutment with the first elastic member 8 so that the temperature measuring component 2 switches from the first position to the second position, the driving rod 5 continues to be pushed, and when the driving rod 5 abuts with the abutment portion 16, it will drive the abutment portion 16 to move. The first section 101 is locked and unlocked when the second elastic member 14 is in a state of being locked.

[0043] As another embodiment of the present invention, the blocking block 12 is slidably connected to the second section 102. Specifically, the blocking block 12 is in the shape of an elongated strip, and is arranged along the radial direction of the second section 102. A spherical surface is provided at one end of the blocking block 12 away from the central axis of the second section 102, and the spherical surface can be coated with a material with a large dynamic friction coefficient such as rubber. A second through hole 22 adapted to the blocking block 12 is provided on the second section 102, and the blocking block 12 is slidably connected to the second through hole 22. The advantage of such a setting is that, firstly, under the limiting effect of the second through hole 22, the blocking block 12 can only move along the radial direction of the second section 102. When When the side of the blocking block 12 abuts against the end of the first section 101, the previous flexible lock can be changed into a hard lock, thereby improving the locking effect of the blocking block 12. Secondly, when the unlocking rod 15 abuts against the second elastic member 14, it will drive the blocking block 12 to slide in the direction away from the central axis of the second section 102, so that the spherical surface of the blocking block 12 abuts against human tissue, which can increase the resistance of the second section 102 during movement, so that the position of the second section 102 can be passively flexibly fixed to minimize sliding of the second section 102.

[0044] A push rod 17 is slidably arranged inside the driving rod 5, and two transmission blocks 18 are slidably arranged on the driving rod 5. A third elastic member 19 is arranged between the two transmission blocks 18, and the third elastic member 19 is located on the movement stroke of the push rod 17. Specifically, the push rod 17 is coaxially arranged with the driving rod 5, and the two are also not relatively rotatable. The end thereof away from the first section 101 penetrates to the outside of the driving rod 5. A sealing plate 21 is arranged on the connecting portion 9, and the sealing plate 21 abuts against the push rod 17. The sealing plate 21 is preferably made of a soft rubber material. On the one hand, it can limit the position of the push rod 17 to prevent the push rod 17 from detaching from the driving rod 5, and on the other hand, it can facilitate the application of force to the push rod 17. The positions of the two transmission blocks 18 are arranged corresponding to the positions of the temperature measuring component 2, and the two transmission blocks 18 can only slide along the radial direction of the driving rod 5. The third elastic member 19 is an arc-shaped structure, and the third elastic member 19 is also preferably a metal spring sheet, which is subjected to After the force generates deformation, it has the ability to self-recover, and the push rod 17 abuts against the third elastic member 19. The effect of such a setting is that when no force is applied to the push rod 17, the third elastic member 19 is in a natural state, and the two transmission blocks 18 will not protrude from the outer peripheral surface of the driving rod 5 under the connection of the third elastic member 19, and under the elastic force of the third elastic member 19, the push rod 17 is fixed between the third elastic member 19 and the sealing plate 21 to prevent the push rod 17 from sliding at will. When the position of the microwave sending component 3 needs to be adjusted, it has the following strokes: first, puncture the sharp end of the needle body 1 to the puncture stroke where the tumor is far away from the body; second, push the driving rod 5 so that the transmission block 18 and the first elastic member 18 are in a natural state. The first part 102 is abutted against the first part 106 and the second part 107 is abutted against the first part 107 and the second part 108 is abutted against the first part 106 and the second part 107 is abutted against the first part 106 and the second part 108 ... When the fixed block 7 is located on the movement stroke of the transmission block 18, the driving rod 5 is pulled in the reverse direction, and the transmission block 18 abuts against the fixed block 7, so that when the transmission block 18 moves, the first section 101 is driven to move in the reverse direction as a whole through the fixed block 7, and the spring 11 is charged, so that the position of the microwave sending component 3 can be adjusted synchronously to achieve the stroke of omnidirectional ablation of the tumor (and in the process of omnidirectional ablation, the edge position of the second section 102 self-cleans the outer peripheral surface of the first section 101). Fifth, when the ablation is completed, the sealing plate 21 is released, and the push rod 17 and the transmission block 18 are automatically reset under the elastic force of the third elastic member 19, and the transmission block 18 is separated from the fixed block 7. At this time, when the driving rod 5 is pulled,The first section 101 will not move away synchronously. When the transmission block 18 moves to the right side of the right fixed block 7 (at this time, the temperature measuring component 2 is passively switched from the second position to the first position under the action of the first elastic member 8), the sealing plate 21 is pressed again, and then the driving rod 5 is pushed to the left. At this time, the transmission block 18 abuts against the right fixed block 7, thereby driving the fixed block 7 and the first section 101 to move synchronously to the left to achieve the reset stroke of the first section 101. Sixth, since the driving rod 5 is away from the abutment portion 16, the internal pressure of the sealing chamber 20 is released, thereby driving the abutment portion 16 and the unlocking rod 15 to automatically reset (and when the first section 101 is reset to the leftmost end, the elastic force of the second elastic member 14 is released, which will also further push the unlocking rod 15 to reset). The blocking block 12 is automatically reset under the elastic force of the second elastic member 14 to lock the first section 101 passively. Then, the force applied to the driving rod 5 is cancelled, and the driving rod 5 is automatically reset under the elastic force of the spring 11.

[0045] It should be noted that the abutting areas involved in the present invention are all chamfered to make the abutting process smoother.

[0046] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A microwave ablation needle with optical fiber temperature measurement, comprising a needle body for providing microwave energy and a temperature measurement component arranged on the needle body, characterized in that: The temperature measuring component has a first position received in the needle body and a second position for extending out of the needle body to measure the temperature of the tumor tissue; The temperature measuring component is slidably disposed on the needle body, and further comprises a power component for driving the temperature measuring component to switch between the first position and the second position; The power assembly includes a driving rod, a slide groove adapted to the driving rod is provided inside the needle body, the driving rod is slidably connected to the slide groove, a fixing block is provided on the inner wall of the slide groove, a first elastic member is provided between the fixing block and the temperature measuring assembly, and the first elastic member is located on the movement stroke of the driving rod; The needle body comprises a first section and a second section which are slidably connected to each other, and a locking member is provided between the first section and the second section to prevent the two sections from sliding relative to each other; The second section is sleeved on the outside of the first section, and a limiting structure is provided between the first section and the second section to prevent the two sections from rotating relative to each other and from separating from each other; The locking member comprises a blocking block, an accommodating groove is provided on the inner wall of the second section, a second elastic member is fixedly connected to the side wall of the accommodating groove, and the blocking block is fixedly connected to the second elastic member; The driving rod is provided with a connecting portion, the needle body is provided with a needle seat, and a spring is provided between the connecting portion and the needle seat; A release lever is slidably disposed on the first section, and an abutment portion is disposed on the release lever, the abutment portion is located on the movement stroke of the driving lever, and the second elastic member is located on the movement stroke of the release lever; There are two unlocking rods, both of which are L-shaped. The long side of the unlocking rod is slidably arranged inside the first section, and the short side is located inside the second section and on one side of the second elastic member. The abutment portion is located in the middle of the two unlocking rods and is used to connect the two unlocking rods. The driving rod can be pushed to abut against the abutment portion, and then the driving rod is further pushed to drive the unlocking rod to move, so as to release the locking effect; A push rod is slidably arranged inside the driving rod, two transmission blocks are slidably arranged on the driving rod, a third elastic member is arranged between the two transmission blocks, and the third elastic member is located on the movement stroke of the push rod; The transmission block abuts against the fixed block, thereby driving the transmission block to move, and at the same time, the first section is driven to move in the opposite direction as a whole through the fixed block.

2. A microwave ablation needle with optical fiber temperature measurement according to claim 1, characterized in that: The temperature measurement component is at least one of a fiber grating sensor, a fiber fluorescence sensor and an interference fiber sensor.

3. A microwave ablation needle with optical fiber temperature measurement according to claim 1, characterized in that: The needle body is made of one of metal materials, inorganic non-metal materials, polymer materials and composite materials.

4. The microwave ablation needle with optical fiber temperature measurement according to claim 1, characterized in that: The blocking block is slidably connected to the second section.

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