Radiofrequency ablation rotary cutter

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a radiofrequency ablation rotary cutter which comprises a handle front shell, a rotary cutter tube, an inner needle rod and an outer needle rod which are coaxially arranged are assembled at one end of the handle front shell, and the rotary cutter tube, the inner needle rod and the outer needle rod are sequentially arranged from the inner side to the outer side. And the handle front shell is fixedly connected with the outer needle rod. After the first negative electrode locally pierces into the lesion tissue, the adjusting lantern ring is rotated, so that a sampling area is formed between the first negative electrode and the second negative electrode, and the lesion tissue and body fluid at the front end and the rear end of the needle passage are subjected to thermal coagulation or ablation through the piercing needle rod, the second negative electrode, the outer needle rod and the first negative electrode respectively; the pathological tissues are cut or sampled through the rotary cutting knife tube, so that diffusion caused by the fact that body fluid flows out of the inlet of the needle passage before sampling is completed is avoided, and the risk of pathological diffusion in the operation process is further reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of medical equipment, and in particular relates to a radiofrequency ablation rotary cutter. Background Art

[0002] In the medical field, the removal or sampling of diseased tissues by rotary cutting is one of the key steps in diagnosis and treatment. When traditional rotary cutting inserts into the tissue for removal or sampling, it will cause tissue tearing and form a needle track. This process requires special care when dealing with malignant diseased tissues, because there is a risk that the body fluid inside the malignant diseased tissue will flow out of the needle track. Once the body fluid inside the diseased tissue flows out, it may cause the disease to spread, increasing the risk and complexity of the patient.

[0003] In order to reduce the risk of body fluids leaking out of diseased tissue, a series of improvements have been made to the existing rotary cutter technology. Among them, rotary cutters with ablation and thermocoagulation functions have become a solution. After resecting or sampling the diseased tissue, this type of rotary cutter can thermocoagulate or ablate the diseased tissue by heating, thereby killing the diseased cells in the body fluid. However, although the rotary cutters in the prior art have ablation and thermocoagulation functions, most of them perform ablation only after resecting or sampling the diseased tissue, which means that there is still a time window from the time the rotary cutter penetrates the tissue to the start of ablation, during which the risk of body fluid leakage from the needle channel is not effectively controlled.

[0004] In summary, although the existing rotary cutting knife technology has made some progress in reducing the outflow of body fluids from diseased tissues, there is still room for improvement. In particular, how to effectively prevent the leakage of body fluids during the period from the insertion of the rotary cutting knife into the tissue to the start of ablation is still a problem that needs to be solved. Based on the above problems, this application document proposes a radiofrequency ablation rotary cutting knife to further reduce the risk of diffusion during the removal or sampling of diseased tissues. Summary of the invention

[0005] The purpose of the present invention is to provide a radiofrequency ablation rotary cutter. After the first negative electrode is locally inserted into the diseased tissue, the adjustment ring is rotated to form a sampling area between the first negative electrode and the second negative electrode. The diseased tissue and body fluid at the front and rear ends of the needle channel are first thermally coagulated or ablated by inserting the needle rod and the second negative electrode as well as the outer needle rod and the first negative electrode, respectively. The diseased tissue is then removed or sampled through the rotary cutter tube to avoid the body fluid flowing out of the needle channel entrance before the sampling is completed and causing diffusion, thereby further reducing the risk of disease spread during the operation.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A radiofrequency ablation rotary cutter, comprising a handle front shell, one end of which is equipped with a coaxial rotary cutter tube, an inner needle rod and an outer needle rod, the rotary cutter tube, the inner needle rod and the outer needle rod are arranged in sequence from the inside to the outside, the handle front shell and the outer needle rod are fixedly connected, the rotary cutter tube and the inner needle rod, as well as the inner needle rod and the outer needle rod are all slidably connected, and an insertion needle rod is fixed to the end of the inner needle rod away from the handle front shell, the end of the outer needle rod close to the insertion needle rod is equipped with a first negative electrode, the end of the insertion needle rod close to the inner needle rod is equipped with a second negative electrode, a first ablation area can be formed around the insertion needle rod and the second negative electrode, a second ablation area can be formed around the outer needle rod and the first negative electrode, a rotary cut clearance groove is provided on the outer side of the inner needle rod close to the insertion needle rod, and further comprising:

[0008] an ablation position adjustment part, which is mounted on an end of the front shell of the handle away from the insertion needle rod, and is connected to the inner needle rod, and can drive the inner needle rod, the insertion needle rod and the second negative electrode to move relative to the first negative electrode;

[0009] A rotary cutting drive unit, which is mounted on the ablation position adjustment unit and is connected to the rotary cutting blade tube. The rotary cutting drive unit can drive the rotary cutting blade tube to move and / or rotate, and the target tissue can be excised and sampled through the rotary cutting blade tube;

[0010] When the device is in a sampling state, the first ablation area and the second ablation area are away from each other, and a sampling area is formed between the first ablation area and the second ablation area. After sampling is completed, the ablation position adjustment part is operated, and the insertion needle rod and the second negative electrode can ablate the sampling area.

[0011] In a preferred embodiment, insulating bushings are provided between the outer needle rod and the first negative electrode and between the piercing needle rod and the second negative electrode. In an initial state, the first negative electrode and the second negative electrode are isolated from each other.

[0012] In a preferred embodiment, the ablation position adjustment part includes a handle rear shell and an adjustment ring, the handle rear shell is slidably connected to the end of the outer side of the handle front shell away from the insertion needle rod, and the handle rear shell and the inner needle rod are fixedly connected, the adjustment ring is rotatably connected to the end of the outer side of the handle rear shell close to the handle front shell, and the adjustment ring and the handle front shell are threadedly connected.

[0013] In a preferred embodiment, a scale surface is provided on the outer side of the front shell of the handle, and a plurality of scale marks are evenly arranged on the upper end of the scale surface, and the scale marks are matched with the adjustment ring.

[0014] In a preferred embodiment, a plurality of guide bosses are provided in a circular array at one end of the outer side of the front shell of the handle, and a plurality of guide grooves are provided in a circular array at one end of the inner side of the rear shell of the handle. The plurality of guide bosses and the plurality of guide grooves correspond one to one, and the front shell of the handle and the rear shell of the handle are slidably connected by the cooperation of the guide bosses and the guide grooves.

[0015] In a preferred embodiment, the peeling drive unit includes a first drive motor, a threaded rod, a linkage plate, a second drive motor, a shaft rod, a driving gear, a driven gear and a control unit, the first drive motor is fixed to the inside of the handle rear shell, the threaded rod is fixed to the output end of the first drive motor, the linkage plate is threadedly connected to the outside of the threaded rod, and the linkage plate and the peeling knife tube are rotatably connected, the second drive motor is fixed to the inside of the handle rear shell, the shaft rod is fixed to the output end of the second drive motor, and the threaded rod and the first drive motor, as well as the shaft rod and the first drive motor are all rotatably connected, the driving gear is fixed to the outside of the shaft rod, the driven gear is fixed to the outside of the peeling knife tube, and the driving gear and the driven gear are meshed and connected, the control unit is fixed to the outside of the handle rear shell, and the first drive motor and the control unit, as well as the second drive motor and the control unit are electrically connected through wires.

[0016] In a preferred embodiment, a limiting collar is fixed on the outer side of the rotary cutting blade tube, the cross-sectional shape of the limiting collar is an I-shape, and the linkage plate and the limiting collar are rotatably connected.

[0017] In a preferred embodiment, the material of the rotary cutting blade tube, the inner needle rod, the outer needle rod and the insertion needle rod is any one of the following materials: titanium, 3 second negative electrode L stainless steel or other hard metal materials with biocompatibility.

[0018] In a preferred embodiment, both the outer wall and the inner wall of the outer needle rod are provided with an insulating film, and an electrode segment is reserved at one end of the outer side of the outer needle rod close to the first negative electrode.

[0019] The technical effects achieved by the present invention are:

[0020] After the first negative electrode partially penetrates the diseased tissue, the present invention rotates the adjusting ring to drive the piercing needle rod and the second negative electrode to continue to penetrate the diseased tissue through the adjusting ring, so that a sampling area is formed between the first negative electrode and the second negative electrode, and the diseased tissue and body fluid at the front end and the rear end of the needle tract are thermally coagulated or ablated respectively through the first ablation current field formed by the piercing needle rod and the second negative electrode and the second ablation current field formed by the outer needle rod and the first negative electrode, and then the diseased tissue is excised or sampled through the rotary cutting knife tube. Since the first negative electrode does not completely penetrate the diseased tissue, the diseased tissue and body fluid near the entrance of the needle tract are thermally coagulated or ablated through the first negative electrode, so as to avoid the body fluid flowing out of the entrance of the needle tract before the sampling is completed and causing diffusion. Compared with the surgical method of first excision or sampling and then ablation in the prior art, the risk of disease spread during the operation is further reduced;

[0021] After the sampling is completed, the present invention rotates the adjustment ring in the reverse direction, so that the handle rear shell, the puncture needle rod and the second negative electrode move in the reverse direction, and the sampling area is thermally coagulated or ablated by the cooperation of the puncture needle rod and the second negative electrode. The tissue and body fluid near the needle track can be thermally coagulated or ablated by the cooperation of the outer needle rod and the first negative electrode and the puncture needle rod and the second negative electrode, thereby further reducing the risk of lesion spread.

[0022] The present invention can accurately adjust the length of the sampling area in the extension direction of the rotary cutting knife tube by adjusting the cooperation between the collar and the scale mark, which is convenient for medical staff to operate and makes the device easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a cross-sectional view of the overall structure of the present invention;

[0025] Figure 3 The present invention Figure 2 A local enlarged schematic diagram of the middle A;

[0026] Figure 4 It is a schematic diagram of the structure explosion of the ablation position adjustment part of the present invention;

[0027] Figure 5 The present invention Figure 4 A partial enlarged schematic diagram of point B in the middle;

[0028] Figure 6 It is a schematic diagram of the structure inside the rear shell of the handle of the present invention;

[0029] Figure 7 The present invention Figure 6 A partial enlarged schematic diagram of point C in the middle;

[0030] Figure 8 It is a structural schematic diagram of the working state of the present invention;

[0031] Fig. 9 The present invention Figure 8 A partial enlarged schematic diagram of point D in the middle;

[0032] Fig.10 It is an enlarged schematic diagram of the local structure when the present invention is in working state.

[0033] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0034] 10. Handle front shell; 11. Peeling knife tube; 12. Inner needle rod; 1201. Peeling slot; 13. Outer needle rod; 14. Insertion needle rod; 15. First negative electrode; 1501. First cable tube; 16. Second negative electrode; 1601. Second cable tube; 17. Insulating bushing; 18. Scale surface; 19. Guide boss;

[0035] 20. Ablation position adjustment unit;

[0036] 21. handle back shell; 22. adjustment ring; 23. guide groove;

[0037] 30. Peeling drive unit;

[0038] 31. First drive motor; 32. Threaded rod; 33. Linkage plate; 34. Second drive motor; 35. Shaft; 36. Driving gear; 37. Driven gear; 38. Control unit; 39. Limiting collar. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0041] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in a preferred embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0042] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0043] Please see attached Figures 1 to 3 as well as Fig. 9 As shown in the figure, it is the first embodiment of the present invention, which provides a radiofrequency ablation rotary cutter, including a handle front shell 10, one end of the handle front shell 10 is equipped with a coaxial rotary cutter tube 11, an inner needle rod 12 and an outer needle rod 13, the rotary cutter tube 11, the inner needle rod 12 and the outer needle rod 13 are arranged in sequence from the inside to the outside, the rotary cutter tube 11 is provided with a rotary cutting edge at one end away from the handle front shell 10, the handle front shell 10 and the outer needle rod 13 are fixedly connected, and the rotary cutter tube 11 and the inner needle rod 12 and the inner needle rod 12 and the outer needle rod 13 are connected. All are slidingly connected, and the end of the inner needle rod 12 away from the front shell 10 of the handle is fixed with the piercing needle rod 14, the end of the outer needle rod 13 close to the piercing needle rod 14 is equipped with a first negative electrode 15, and the end of the piercing needle rod 14 close to the inner needle rod 12 is equipped with a second negative electrode 16. A first ablation area can be formed around the piercing needle rod 14 and the second negative electrode 16, and a second ablation area can be formed around the outer needle rod 13 and the first negative electrode 15. A rotary cut clearance groove 1201 is opened at the end of the outer side of the inner needle rod 12 close to the piercing needle rod 14, and also includes:

[0044] The ablation position adjustment part 20 is mounted on the end of the handle front shell 10 away from the puncture needle rod 14, and the ablation position adjustment part 20 is connected to the inner needle rod 12. The ablation position adjustment part 20 can drive the inner needle rod 12, the puncture needle rod 14 and the second negative electrode 16 to move relative to the first negative electrode 15;

[0045] The rotary cutting drive unit 30 is mounted on the ablation position adjustment unit 20, and the rotary cutting drive unit 30 is connected to the rotary cutting blade tube 11. The rotary cutting drive unit 30 can drive the rotary cutting blade tube 11 to move and / or rotate, and the target tissue can be excised and sampled through the rotary cutting blade tube 11;

[0046] When the device is in a sampling state, the first ablation area and the second ablation area are away from each other, and a sampling area is formed between the first ablation area and the second ablation area. After sampling, the ablation position adjustment part 20 is operated, and the needle rod 14 and the second negative electrode 16 are inserted to ablate the sampling area.

[0047] It should be noted that an air pump module and at least one radio frequency generating module are also used in conjunction with the device. A first cable tube 1501 is provided between the inner needle rod 12 and the outer needle rod 13, and a second cable tube 1601 is provided between the rotary cutting knife tube 11 and the inner needle rod 12. The first cable tube 1501 and the outer needle rod 13, the first cable tube 1501 and the first negative electrode 15, the second cable tube 1601 and the piercing needle rod 14, and the second cable tube 1601 and the second negative electrode 16 are all adapted to each other. The second cable tube 1601 and the first cable tube 1501 are both provided with power supply wires (the outer sides of the power supply wires are provided with insulating layers to avoid short circuits), and the outer needle rod 13 and the first negative electrode 16 are both provided with power supply wires. The rod 13 and the radio frequency generating module, the insertion needle rod 14 and the radio frequency generating module, the first negative electrode 15 and the radio frequency generating module, and the second negative electrode 16 and the radio frequency generating module are all connected through a power supply wire, wherein the insertion needle rod 14, the second negative electrode 16, the power supply wire and the radio frequency generating module together constitute a first ablation circuit, and the outer needle rod 13, the first negative electrode 15, the power supply wire and the radio frequency generating module constitute a second ablation circuit. After the radio frequency generating module is started, a first ablation current field is generated between the insertion needle rod 14 and the second negative electrode 16 and a first ablation area is formed, and a second ablation current field is generated between the outer needle rod 13 and the first negative electrode 15 and a second ablation area is formed.

[0048] Here, the insertion needle shaft 14 serves as a positive electrode in the first ablation circuit, and the outer needle shaft 13 serves as a positive electrode in the second ablation circuit.

[0049] It should be noted that mutual interference between the first ablation circuit and the second ablation circuit can be avoided by regulating the power of the radio frequency generation module.

[0050] Furthermore, a circulating cooling passage is also provided inside the device, and a cooling module is used in conjunction with the circulating cooling passage. The cooling module can transport cooling medium into the circulating cooling passage to achieve the purpose of cooling local tissue. In this embodiment, the first cable tube 1501 and the second cable tube 1601 serve as paths for inputting the cooling medium, and the rotary cutting knife tube 11 serves as an output path for the cooling medium. The cooling medium can be driven to circulate through the cooling module. Of course, this is only one way for the cooling medium to circulate. In the field of ablation equipment technology, the application of circulating cooling passages is an existing mature technology. The flow path and method of the cooling medium can be adjusted according to actual usage requirements. No specific limitation is constituted herein, as long as the purpose of cooling local diseased tissue by circulating the cooling medium can be achieved.

[0051] In this embodiment, when the diseased tissue is excised or sampled, the image of the diseased tissue is obtained by imaging equipment, the ablation position adjustment part 20 is held, and the device is inserted into the diseased tissue by inserting the needle rod 14. After the inserting needle rod 14 inserts into the diseased tissue, the diseased tissue is torn to form a needle track, and the device is continued to be inserted into the diseased tissue until the first negative electrode 15 is about to completely penetrate into the diseased tissue (at this time, the first negative electrode 15 has not completely penetrated into the diseased tissue). The front shell 10 of the handle is held still. At the same time, since the front shell 10 of the handle is fixedly connected to the outer needle rod 13, the outer needle rod 13 and the first negative electrode 15 remain stationary. The ablation position adjustment part 20 is operated. Since the ablation position adjustment part 20 is connected to the inner needle rod 12 and The inner needle rod 12 and the insertion needle rod 14 are fixedly connected, so that the ablation position adjustment part 20 drives the inner needle rod 12, the insertion needle rod 14 and the second negative electrode 16 to continue to penetrate into the diseased tissue, so that the distance between the first negative electrode 15 and the second negative electrode 16 gradually increases, until the rotation cut allows the empty groove 1201 to reach a suitable position, so that the device is changed from an initial state to a working state, and the radio frequency generating module is started, so that the first ablation current field and the second ablation current field are formed around the second negative electrode 16 and the first negative electrode 15 respectively (at this time, the first ablation area and the second ablation area are far away from each other, and a sampling area is formed between the first ablation area and the second ablation area), and the second negative electrode 16 and the first negative electrode 15 are located in the first ablation area and the second ablation area. The diseased tissue in the ablation area is thermally coagulated or ablated. Since the first negative electrode 15 does not completely penetrate into the diseased tissue, the second ablation area formed by the first negative electrode 15 can cover the entrance position of the needle track (i.e., the rear end of the needle track). The diseased tissue and body fluid near the entrance of the needle track are thermally coagulated or ablated by the first negative electrode 15 to prevent the body fluid carrying diseased cells from flowing out of the entrance of the needle track. The air pump module is started, and the gas inside the rotary cutter tube 11 is extracted through the air pump module to form a negative pressure space inside the rotary cutter tube 11. Under the action of the negative pressure, the diseased tissue near the empty groove 1201 is allowed to enter the inner needle rod 12 through the rotary cutter groove 1201. The rotary cutter drive unit 30 is started, and the rotary cutter tube 11 is driven by the rotary cutter drive unit 30 to operate. The rotary cutter tube 11 excises the diseased tissue adsorbed to the inner needle rod 12. The excised or collected diseased tissue flows along the inside of the rotary cutter tube 11 to the outside of the device and is collected under the action of the air pump module. After the excision or sampling is completed, the ablation position adjustment part 20 is reversed to drive the insertion needle rod 14 and the second negative electrode 16 to move toward the first negative electrode 15 through the ablation position adjustment part 20 until the second negative electrode 16 and the sampling area are matched. The tissue and body fluid in the sampling area are ablated by the first ablation current field formed by the insertion needle rod 14 and the second negative electrode 16 until the sampling area is completely ablated. In this process, the local diseased tissue is first thermally coagulated or ablated by the first negative electrode 15 and the second negative electrode 16.The lesion tissue is then excised or sampled by the rotary cutting tube 11 to avoid the spread of body fluids before the sampling is completed. Compared with the prior art surgical method of first excising or sampling and then ablating, the risk of lesion spread during the operation is further reduced.

[0052] Furthermore, the initial state refers to a state where the two rotary cut grooves 1201 between the insertion needle rod 14 and the second negative electrode 16 and between the outer needle rod 13 and the first negative electrode 15 are in contact with each other, and the working state refers to a state where the two rotary cut grooves 1201 between the insertion needle rod 14 and the second negative electrode 16 and between the outer needle rod 13 and the first negative electrode 15 are separated from each other.

[0053] It should be noted that when the sampling area is long, that is, the first ablation zone cannot completely cover the sampling area at one time, the sampling area can be ablated multiple times by the second negative electrode 16 to achieve complete ablation of the diseased tissue near the needle track.

[0054] Specifically, in this embodiment, from the time when the rotary cutting groove 1201 reaches the appropriate position until the device is removed from the diseased tissue, the second ablation circuit composed of the outer needle rod 13 and the first negative electrode 15 is always in operation, and the needle entrance is continuously thermally coagulated.

[0055] Next, please refer to Figure 3 An insulating bushing 17 is provided between the outer needle rod 13 and the first negative electrode 15, and between the piercing needle rod 14 and the second negative electrode 16, and the outer needle rod 13 and the first negative electrode 15, and the piercing needle rod 14 and the second negative electrode 16 are fixedly connected by the insulating bushing 17. In the initial state, the first negative electrode 15 and the second negative electrode 16 are isolated from each other by the insulating bushing 17.

[0056] It should be noted that the material of the insulating bushing 17 can be any one of the following materials: ceramic, polyurethane (PUR), polyetheretherketone (PEEK), polytetrafluoroethylene (PTFE) or other biocompatible insulating materials. Preferably, in the present embodiment, the material of the insulating bushing 17 is preferably ceramic.

[0057] Furthermore, the outer wall and the inner wall of the outer needle rod 13 are both provided with an insulating film (not shown in the figure), wherein the insulating film located on the inner wall of the outer needle rod 13 completely covers the inner wall of the outer needle rod 13, and the insulating film located on the outer wall of the outer needle rod 13 does not completely cover the outer wall of the outer needle rod 13. An exposed electrode segment is reserved at one end of the outer side of the outer needle rod 13 close to the first negative electrode 15 (that is, the part not covered by the insulating film. Through the reserved motor segment, the outer needle rod 13 and the first negative electrode 15 can form a second ablation area). In this embodiment, the length of the exposed electrode segment ranges from 0.5 to 3 cm. Of course, the length of the electrode segment can be adjusted according to actual needs, and it does not constitute a specific limitation here.

[0058] In this embodiment, the provision of the insulating sleeve can prevent the outer needle rod 13 and the first negative electrode 15, the piercing needle rod 14 and the second negative electrode 16, and the first negative electrode 15 and the second negative electrode 16 from contacting each other and causing a short circuit.

[0059] Secondly, please also refer to Figure 4 and Figure 6 The ablation position adjustment part 20 includes a handle rear shell 21 and an adjustment ring 22. The handle rear shell 21 is slidably connected to the end of the outer side of the handle front shell 10 away from the insertion needle rod 14, and the handle rear shell 21 and the inner needle rod 12 are fixedly connected. The adjustment ring 22 is rotatably connected to the end of the outer side of the handle rear shell 21 close to the handle front shell 10, and the adjustment ring 22 and the handle front shell 10 are threadedly connected.

[0060] Furthermore, a clamping plate is integrally formed inside the handle rear shell 21, and the inner needle rod 12 is fixedly connected to the clamping plate. The handle rear shell 21 and the inner needle rod 12 are fixedly connected via the clamping plate.

[0061] It should be noted that an external threaded end is provided on the outer side of the front shell 10 of the handle away from the piercing needle rod 14 , and the adjusting collar 22 and the front shell 10 of the handle are threadedly connected via the external threaded end.

[0062] In this embodiment, after holding the ablation position adjustment part 20 and inserting the device into the diseased tissue and the first negative electrode 15 partially penetrates the diseased tissue, hold the handle front shell 10 and rotate the adjustment collar 22 (at this time, the handle front shell 10, the outer needle rod 13 and the first negative electrode 15 remain stationary). Since the adjustment collar 22 and the handle front shell 10 are threadedly connected, the adjustment collar 22 moves relative to the handle front shell 10. Through the rotational connection between the adjustment collar 22 and the handle rear shell 21, the adjustment collar 22 drives the handle rear shell 21 to move. Since the handle rear shell 21 and the inner needle rod 12 and the inner needle rod 12 and the insertion needle rod 14 are fixedly connected, the inner needle rod 12, the insertion needle rod 14 and the second negative electrode 16 are driven to move through the handle rear shell 21, thereby adjusting the position covered by the first ablation area, so that after the cutting or sampling is completed, the sampling area can be thermally coagulated or ablated by the second negative electrode 16.

[0063] Next, please refer to Figure 1 and Figure 4 As shown, a scale surface 18 is provided on the outer side of the handle front shell 10 , and a plurality of scale marks are evenly arranged on the upper end of the scale surface 18 , and the scale marks are matched with the adjustment ring 22 .

[0064] It should be noted that the scale mark farthest from the piercing needle rod 14 is marked as the reference mark. In the initial state, the end of the adjustment ring 22 close to the handle front shell 10 corresponds to the reference mark, and the two insulating bushings 17 are in contact with each other.

[0065] In this embodiment, after rotating the adjustment ring 22, the handle rear shell 21 drives the inner needle rod 12, the insertion needle rod 14 and the second negative electrode 16 to move synchronously. During this process, the setting of the scale mark makes it convenient for medical staff to accurately read the movement distance of the handle rear shell 21 relative to the handle front shell 10, and then judge the distance between the first negative electrode 15 and the second negative electrode 16 and the length of the sampling area in the extension direction of the inner needle rod 12.

[0066] Please refer again Figure 5 A plurality of guide bosses 19 are provided in a circular array on one end of the outer side of the handle front shell 10 near the handle rear shell 21, and a plurality of guide grooves 23 are provided in a circular array on one end of the inner side of the handle rear shell 21 near the handle front shell 10. The plurality of guide bosses 19 and the plurality of guide grooves 23 correspond one to one, and the handle front shell 10 and the handle rear shell 21 are slidably connected through the cooperation of the guide bosses 19 and the guide grooves 23.

[0067] In this embodiment, by cooperating with the guide boss 19 and the guide groove 23 , the handle rear shell 21 can be guided when the handle rear shell 21 moves relative to the handle front shell 10 to prevent the handle rear shell 21 from rotating relative to the handle front shell 10 .

[0068] Please refer again Figure 6 to Figure 7 As shown, the peeling drive unit 30 includes a first drive motor 31, a threaded rod 32, a linkage plate 33, a second drive motor 34, a shaft 35, a driving gear 36, a driven gear 37 and a control unit 38. The first drive motor 31 is fixed to the inside of the handle rear shell 21, the threaded rod 32 is fixed to the output end of the first drive motor 31, the linkage plate 33 is threadedly connected to the outside of the threaded rod 32, and the linkage plate 33 is rotatably connected to the peeling knife tube 11, the second drive motor 34 is fixed to the inside of the handle rear shell 21, and the shaft 35 is fixed to the output end of the first drive motor 31. The output end of the second drive motor 34 is fixed, and the threaded rod 32 and the first drive motor 31 as well as the shaft rod 35 and the first drive motor 31 are rotationally connected, the driving gear 36 is fixed to the outside of the shaft rod 35, the driven gear 37 is fixed to the outside of the rotary cutter tube 11, and the driving gear 36 and the driven gear 37 are meshed and connected, the control unit 38 is fixed to the outside of the handle rear shell 21, and the first drive motor 31 and the control unit 38 as well as the second drive motor 34 and the control unit 38 are electrically connected through wires.

[0069] Furthermore, a limiting collar 39 is fixed to the outer side of the rotary cutter tube 11 , the cross-sectional shape of the limiting collar 39 is an I-shape, the linkage plate 33 is rotatably connected to the limiting collar 39 , and the rotary cutter tube 11 and the linkage plate 33 are rotatably connected via the limiting collar 39 .

[0070] In this embodiment, when the rotary cutting allows the empty groove 1201 to reach a suitable position and starts to cut the diseased tissue, the first drive motor 31 and the second drive motor 34 are started by the control unit 38. After the first drive motor 31 is running, the first drive motor 31 and the threaded rod 32 are fixedly connected, and the first drive motor 31 drives the threaded rod 32 to rotate. Since the threaded rod 32 and the linkage plate 33 are threadedly connected and the linkage plate 33 and the rotary cutting blade tube 11 rotate, the threaded rod 32 drives the linkage plate 33 and the rotary cutting blade tube 11 to move. After the second drive motor 34 is running, the output end of the second drive motor 34 drives the shaft rod 35 and the driving gear 36 to rotate. 6 rotates, because the driving gear 36 and the driven gear 37 are meshed and connected, and the rotary cutter tube 11 and the driven gear 37 are fixedly connected, the driving gear 36 drives the driven gear 37 and the rotary cutter tube 11 to rotate, and the rotation direction of the first driving motor 31 is repeatedly changed. Through the cooperation of the first driving motor 31 and the second driving motor 34, the rotary cutter tube 11 makes a reciprocating rotational motion in the extending direction of the inner needle rod 12, and the diseased tissue adsorbed to the inside of the inner needle rod 12 is removed by the rotary cutter tube 11. At the same time, under the action of negative pressure, the removed diseased tissue inside the rotary cutter tube 11 can be moved to the outside of the device and collected.

[0071] It should be noted that, in the extension direction of the rotary cutter tube 11, the length of the driven gear 37 is greater than the length of the driving gear 36. When the driving gear 36 synchronously performs reciprocating rotational motion with the rotary cutter tube 11, the driving gear 36 and the driven gear 37 always maintain a meshing connection state, and only the relative position changes.

[0072] In a preferred embodiment, the material of the rotary cutting blade tube 11, the inner needle rod 12, the outer needle rod 13 and the piercing needle rod 14 is any one of the following materials: titanium, 3 second negative electrode 16L stainless steel or other hard metal materials with biocompatibility.

[0073] In this embodiment, the hard metal with biocompatibility can ensure that the device can easily penetrate the diseased tissue and can also avoid triggering an immune response.

[0074] The working principle of the present invention is:

[0075] See also Figures 8 to 10As shown, when the diseased tissue is to be removed or sampled, under the guidance of the imaging device, the ablation position adjustment part 20 is held, and the device is inserted into the diseased tissue through the insertion needle rod 14 until the first negative electrode 15 is about to be completely inserted into the diseased tissue, and a part of the first negative electrode 15 is retained outside the diseased tissue. After the insertion needle rod 14 inserts into the diseased tissue, the diseased tissue is torn to form a needle track, and the front shell 10 of the handle is held to keep the front shell 10 of the handle 10, the outer needle rod 13 and the first negative electrode 15 in a stationary state, and the adjustment ring 22 is operated to drive the inner needle rod 12, the insertion needle rod 14, and the second negative electrode 16 to continue to penetrate into the diseased tissue through the rear shell 21 of the handle, so that the first The distance between the negative electrode 15 and the second negative electrode 16 gradually increases until the rotary cutting allows the empty groove 1201 to reach a suitable position, and the radio frequency generating module is started to form a first ablation area and a second ablation area around the first negative electrode 15 and the second negative electrode 16, respectively. The first negative electrode 15 and the second negative electrode 16 are used to thermally coagulate or ablate the diseased tissue and body fluid at the front end and the rear end of the needle tract, respectively. Since the first negative electrode 15 does not completely penetrate into the diseased tissue, the second ablation area formed by the first negative electrode 15 can cover the entrance position of the needle tract (i.e., the rear end of the needle tract), and the diseased tissue and body fluid near the entrance of the needle tract are thermally coagulated or ablated by the first negative electrode 15, thereby avoiding carrying The body fluid with diseased cells flows out from the entrance of the needle channel, and the air pump module and the cooling module are started. The temperature is reduced by the cooling module, and a negative pressure space is formed inside the rotary cutting knife tube 11 through the air pump module. Under the action of the negative pressure, the diseased tissue near the empty groove 1201 is rotary cut to allow the empty groove 1201 to enter the inner needle rod 12 through rotary cutting. The rotary cutting drive unit 30 is started, and the cooperation of the first drive motor 31 and the second drive motor 34 makes the rotary cutting knife tube 11 perform reciprocating rotational motion in the extension direction of the inner needle rod 12. The diseased tissue adsorbed to the inner needle rod 12 is removed by the rotary cutting knife tube 11. Under the action of the negative pressure, the removed diseased tissue moves along the rotary cutting knife tube 11. The internal fluid is discharged to the outside of the device and collected. After the excision or sampling is completed, the adjusting ring 22 is rotated in the opposite direction, and the inner needle rod 12, the insertion needle rod 14 and the second negative electrode 16 are driven by the handle back shell 21 to move in the direction close to the first negative electrode 15 until the second negative electrode 16 and the sampling area are matched, and the sampling area is ablated by the second negative electrode 16 until the sampling area is completely ablated. In this process, the local diseased tissue is first coagulated or ablated by the first negative electrode 15 and the second negative electrode 16, and then the diseased tissue is excised or sampled by the rotary cutting knife tube 11, so as to avoid the outflow of body fluids before the sampling is completed and cause the spread, thereby further reducing the risk of disease spread during the operation.

[0076] The above are only preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the art unless otherwise specified and limited.

Claims

1. A radiofrequency ablation rotary cutter, characterized in that: The invention comprises a handle front shell (10), one end of which is equipped with a coaxially arranged rotary cutting blade tube (11), an inner needle rod (12) and an outer needle rod (13), the rotary cutting blade tube (11), the inner needle rod (12) and the outer needle rod (13) being arranged in sequence from the inside to the outside, the handle front shell (10) and the outer needle rod (13) being fixedly connected, the rotary cutting blade tube (11) and the inner needle rod (12) and the inner needle rod (12) and the outer needle rod (13) being slidably connected, and the inner needle rod (12) being fixedly connected to the end of the inner needle rod (12) away from the handle front shell (10). The puncture needle rod (14) is provided with a first negative electrode (15) at one end of the outer needle rod (13) close to the puncture needle rod (14), and a second negative electrode (16) is provided at one end of the puncture needle rod (14) close to the inner needle rod (12). A first ablation area can be formed around the puncture needle rod (14) and the second negative electrode (16), and a second ablation area can be formed around the outer needle rod (13) and the first negative electrode (15). A rotary cut clearance groove (1201) is provided at one end of the outer side of the inner needle rod (12) close to the puncture needle rod (14), and further comprises: an ablation position adjustment unit (20), the ablation position adjustment unit (20) being mounted on an end of the handle front shell (10) away from the insertion needle rod (14), and the ablation position adjustment unit (20) being connected to the inner needle rod (12), and the ablation position adjustment unit (20) being capable of driving the inner needle rod (12), the insertion needle rod (14) and the second negative electrode (16) to move relative to the first negative electrode (15); A rotary cutting drive unit (30), the rotary cutting drive unit (30) is mounted on the ablation position adjustment unit (20), and the rotary cutting drive unit (30) is connected to the rotary cutting blade tube (11), the rotary cutting drive unit (30) can drive the rotary cutting blade tube (11) to move and / or rotate, and the target tissue can be excised and sampled through the rotary cutting blade tube (11); When the device is in a sampling state, the first ablation area and the second ablation area are separated from each other, and a sampling area is formed between the first ablation area and the second ablation area. After the sampling is completed, the ablation position adjustment unit (20) is operated, and the insertion needle rod (14) and the second negative electrode (16) can ablate the sampling area.

2. The radiofrequency ablation rotary cutting knife according to claim 1, characterized in that: An insulating bushing (17) is provided between the outer needle rod (13) and the first negative electrode (15) and between the piercing needle rod (14) and the second negative electrode (16). In an initial state, the first negative electrode (15) and the second negative electrode (16) are in a mutually isolated state.

3. The radiofrequency ablation rotary cutter according to claim 1, characterized in that: The ablation position adjustment part (20) comprises a handle rear shell (21) and an adjustment collar (22), wherein the handle rear shell (21) is slidably connected to an end of the handle front shell (10) outside and away from the insertion needle rod (14), and the handle rear shell (21) and the inner needle rod (12) are fixedly connected, and the adjustment collar (22) is rotatably connected to an end of the handle rear shell (21) outside and close to the handle front shell (10), and the adjustment collar (22) and the handle front shell (10) are threadedly connected.

4. The radiofrequency ablation rotary cutter according to claim 3, characterized in that: The outer side of the handle front shell (10) is provided with a scale surface (18), and the upper end of the scale surface (18) is evenly provided with a plurality of scale marks, and the scale marks are matched with the adjustment ring (22).

5. The radiofrequency ablation rotary cutting knife according to claim 3, characterized in that: A plurality of guide bosses (19) are provided in an annular array at one end of the outer side of the handle front shell (10), and a plurality of guide grooves (23) are provided in an annular array at one end of the inner side of the handle rear shell (21). The plurality of guide bosses (19) and the plurality of guide grooves (23) correspond one to one, and the handle front shell (10) and the handle rear shell (21) are slidably connected by the cooperation of the guide bosses (19) and the guide grooves (23).

6. The radiofrequency ablation rotary cutting knife according to claim 3, characterized in that: The rotary cutting drive unit (30) comprises a first driving motor (31), a threaded rod (32), a linkage plate (33), a second driving motor (34), a shaft (35), a driving gear (36), a driven gear (37) and a control unit (38), wherein the first driving motor (31) is fixed inside the handle rear shell (21), the threaded rod (32) is fixed to the output end of the first driving motor (31), the linkage plate (33) is threadedly connected to the outer side of the threaded rod (32), and the linkage plate (33) is rotatably connected to the rotary cutting blade tube (11), the second driving motor (34) is fixed inside the handle rear shell (21), the shaft (35) is fixed to the output end of the first driving motor (31), 5) is fixed to the output end of the second drive motor (34), and the threaded rod (32) and the first drive motor (31) as well as the shaft rod (35) and the first drive motor (31) are all rotatably connected, the driving gear (36) is fixed to the outside of the shaft rod (35), the driven gear (37) is fixed to the outside of the rotary cutter tube (11), and the driving gear (36) and the driven gear (37) are meshingly connected, the control unit (38) is fixed to the outside of the handle rear shell (21), and the first drive motor (31) and the control unit (38) as well as the second drive motor (34) and the control unit (38) are all electrically connected through wires.

7. The radiofrequency ablation rotary cutter according to claim 6, characterized in that: A limiting collar (39) is fixed on the outer side of the rotary cutter tube (11); the cross-section of the limiting collar (39) is an I-shape; and the linkage plate (33) and the limiting collar (39) are rotatably connected.

8. The radiofrequency ablation rotary cutting knife according to claim 1, characterized in that: The material of the rotary cutting blade tube (11), the inner needle rod (12), the outer needle rod (13) and the piercing needle rod (14) is any one of the following materials: titanium, 3L stainless steel or other hard metal materials with biocompatibility.

9. The radiofrequency ablation rotary cutter according to claim 1, characterized in that: The outer wall and the inner wall of the outer needle rod (13) are both provided with an insulating film, and an electrode segment is reserved at one end of the outer side of the outer needle rod (13) close to the first negative electrode (15).

Images