A hot steam ablation exhaust needle pushing mechanism and ablation device using the same

Abstract

The present invention discloses a hot steam ablation exhaust needle pushing mechanism and an ablation device using the same, including an exhaust needle assembly, a needle retraction assembly, a locking hook assembly and a needle removal assembly. The exhaust needle assembly includes a stainless steel double-lumen tube and an exhaust needle, and the exhaust needle is installed in the stainless steel double-lumen tube; the needle retraction assembly includes a needle retraction piece, which is connected to the stainless steel double-lumen tube and the exhaust needle, and the needle retraction piece is pressed to store the exhaust needle in the exhaust needle assembly; the locking hook assembly includes a locking hook, which is used to connect the needle retraction piece; the needle removal assembly includes a needle removal piece, and in the needle removal state, the locking hook is separated from the needle retraction piece; in the needle removal state, the locking hook is connected to the needle retraction piece. In this pushing mechanism, no motor drive is required, the cost is low, and the structure is simple and practical, and it can be operated with one hand. The needle can be manually retracted and removed at any time as needed, which can improve the safety of the product and avoid the inability to remove or retract the needle due to power outage or circuit failure.

Description

Technical Field

[0001] The present invention relates to the technical field of steam ablation, and in particular to a hot steam ablation exhaust needle pushing mechanism and an ablation device using the same. Background Art

[0002] Prostate thermal steam ablation is an emerging minimally invasive technique combined with endoscopic intervention. This technique injects high-temperature steam directly into the prostate tissue via a catheter. The latent heat released by the steam rapidly raises the tissue temperature, causing the cells in the prostate hyperplasia (lesion) to instantly die, forming a spherical necrotic area. The body's own metabolism then eliminates and repairs the necrotic area, achieving the goal of reducing the size of the prostate. Compared to other methods, this method does not require the implantation of foreign materials and can produce long-term therapeutic effects.

[0003] The needle removal and retraction mechanism of the exhaust needle in prostate thermal steam ablation products is particularly important, which directly affects the therapeutic effect, safety and effectiveness of the thermal steam.

[0004] Existing commercial prostate thermal steam ablation technology uses a motor to drive needle retraction and removal, which is costly, complex, and requires a power source. Both hands are required for both movements, making operation complex. If a power outage or circuit failure occurs after the needle is removed, the handle must be disassembled and the exhaust needle manually retracted, which is very cumbersome and unsafe. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a hot steam ablation exhaust needle pushing mechanism, comprising an exhaust needle assembly, a needle retraction assembly, a locking hook assembly and a needle removal assembly. The exhaust needle assembly comprises a stainless steel double-lumen tube and an exhaust needle, and the exhaust needle is installed in the stainless steel double-lumen tube;

[0006] The needle collection assembly includes a needle collection piece, which is connected to the stainless steel double-lumen tube and the exhaust needle. Pressing the needle collection piece is used to store the exhaust needle in the exhaust needle assembly;

[0007] The locking hook assembly includes a locking hook, which is used to connect the needle narrowing piece;

[0008] The needle-extracting assembly comprises a needle-extracting part. In the needle-extracting state, the locking hook is separated from the needle-retracting part; in the needle-retracting state, the locking hook is connected to the needle-retracting part.

[0009] Preferably, the exhaust needle assembly further comprises a double-lumen tube fixing joint for fixing the stainless steel double-lumen tube;

[0010] The utility model also comprises a tip cap, which is clamped with the front end of the stainless steel double-lumen tube and communicated with the stainless steel double-lumen tube.

[0011] Preferably: the tail end of the exhaust needle is fixed on the needle-reducing member;

[0012] In the needle-out state, the needle-retracting part moves forward, driving the exhaust needle to extend to the outside of the tip cap;

[0013] In the needle-retracting state, the needle-retracting part moves backward, driving the exhaust needle to return to the inside of the tip cap.

[0014] Preferably, the needle collection assembly further comprises a spring positioning column and a needle collection spring, wherein the spring positioning column is sleeved on the needle collection spring, and the needle collection spring is used to provide elastic support to the needle collection member to push the needle collection member to move forward.

[0015] Preferably, the forward and backward movement position of the needle collecting member is relatively fixed, and in the needle-out state, the length of the exhaust needle extending to the outside of the tip cap is a fixed value.

[0016] Preferably, the locking hook assembly further comprises a locking hook and a locking hook torsion spring, the locking hook is provided with a rotating shaft, and the locking hook torsion spring is sleeved on the rotating shaft;

[0017] The rotating shaft is provided with a first connecting portion and a second connecting portion, and the first connecting portion and the second connecting portion form an angle of 90±5 degrees in the radial direction of the rotating shaft.

[0018] Preferably, the needle removal assembly further comprises a needle removal spring and a spring baffle, wherein the spring baffle is fixed to the ablation device and is used to limit the axial position of the needle removal spring.

[0019] Preferably, the inner side wall of the needle ejector is further provided with a bevel, which contacts the second connecting portion and forms an angle of 30-60 degrees.

[0020] An ablation device includes the above-mentioned pushing mechanism, and also includes a left handle shell and a right handle shell connected to the left handle shell. The pushing mechanism is installed on the left handle shell, fixed with screws, and then covered with the right handle shell to complete the installation of the ablation device.

[0021] Preferably, the inner walls of the left shell and the right shell of the handle are both provided with limiting mechanisms, which are connected to the needle shrinking member and are used to limit the forward and backward movement positions of the needle shrinking member.

[0022] Technical effects and advantages of the present invention:

[0023] 1. This pushing mechanism does not require a motor drive, is low-cost, and has a simple and practical structure. It can be operated with one hand, and the needle can be manually retracted and removed at any time as needed, which can improve the safety of the product and avoid the inability to remove or retract the needle due to power outage or circuit failure.

[0024] 2. In this pushing mechanism, the length of the exhaust needle is fixed, that is, the depth of insertion into the prostate tissue is controllable, thereby improving the effectiveness of the treatment area.

[0025] 3. In this ablation device, the needle retraction key is located directly below the handle and is operated by the index finger; the needle removal key is located on the side of the handle and is operated by the thumb. It is ergonomic and can be used with one hand to achieve needle retraction and removal functions, and the operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of a hot steam ablation exhaust needle pushing mechanism provided in an embodiment of the present application;

[0027] Figure 2 Schematic diagram of the structure of the exhaust needle assembly in the pushing mechanism provided in an embodiment of the present application;

[0028] Figure 3 This is a schematic diagram of the structure of the stainless steel double-lumen tube in the pushing mechanism provided in an embodiment of the present application;

[0029] Figure 4 is a cross-sectional view of an exhaust needle assembly in a pushing mechanism provided in an embodiment of the present application;

[0030] Figure 5 This is a schematic structural diagram of the exhaust needle in the pushing mechanism provided in an embodiment of the present application;

[0031] Figure 6 This is the push mechanism provided in the embodiment of the present application. Figure 5 A schematic diagram of the structure at center A;

[0032] Figure 7 It is a structural diagram of the needle retraction assembly and the locking hook assembly in the pushing mechanism provided in an embodiment of the present application;

[0033] Figure 8 is a cross-sectional view of a needle retraction assembly and a locking hook assembly in a pushing mechanism provided in an embodiment of the present application;

[0034] Figure 9 It is a structural diagram of the needle-retracting member in the pushing mechanism provided in an embodiment of the present application;

[0035] Figure 10 This is a structural diagram of a spring positioning column in a pushing mechanism provided in an embodiment of the present application;

[0036] Figure 11 Schematic diagram of the structure of the locking hook assembly in the pushing mechanism provided in an embodiment of the present application;

[0037] Figure 12 This is a schematic structural diagram of the needle ejection assembly in the pushing mechanism provided in an embodiment of the present application;

[0038] Figure 13 This is a schematic structural diagram of a needle ejection member in a hot push mechanism provided in an embodiment of the present application;

[0039] Figure 14is a schematic structural diagram of an ablation device provided in an embodiment of the present application;

[0040] Figure 15 This is a schematic structural diagram of the left shell of the handle of the ablation device provided in an embodiment of the present application;

[0041] Figure 16 This is a schematic structural diagram of the right shell of the handle of the ablation device provided in an embodiment of the present application.

[0042] In the figure: 100, left handle shell; 110, first mounting hole; 120, first chute; 130, first needle-collecting member mounting hole; 140, second chute; 150, needle-exit member mounting hole; 160, first support column; 170, first sleeve; 180, spring baffle fixing hole;

[0043] 200, right handle shell; 210, second mounting hole; 220, third chute; 230, second needle collection member mounting hole; 240, fourth chute; 250, needle output member mounting slot; 260, second support column; 270, second sleeve;

[0044] 300, exhaust needle assembly; 310, heat shrink tubing; 311, exhaust needle sheath; 320, double-lumen tube fixing joint; 321, joint hole; 322, stopper; 330, tip cap; 331, guide groove; 332, needle guide seal ring; 333, needle outlet hole; 340, stainless steel double-lumen tube; 341, first lumen tube; 342, second lumen tube; 350, exhaust needle; 351, bending section; 352, head end; 353, laser ring mark; 354, exhaust hole;

[0045] 400, needle reduction assembly; 410, needle reduction member; 411, pressing portion; 412, exhaust needle slot; 413, double-lumen tube insertion hole; 414, positioning post insertion hole; 415, first slider; 416, second slider; 417, buckle; 420, spring positioning post; 421, column; 422, first protrusion; 423, second protrusion; 424, positioning slot; 425, fixing hole; 430, needle reduction spring;

[0046] 500, locking hook assembly; 510, locking hook; 511, rotating shaft; 512, first connecting portion; 513, second connecting portion; 520, locking hook torsion spring;

[0047] 600, needle ejection assembly; 610, needle ejection member; 611, spring positioning tube; 612, bevel; 613, raised portion; 620, needle ejection spring; 630, spring baffle. DETAILED DESCRIPTION

[0048] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described to better illustrate the principles of the invention and its practical application, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for specific applications.

[0049] See also Figure 1 As shown, in this embodiment, a hot steam ablation exhaust needle pushing mechanism is provided, which includes an exhaust needle assembly 300, a needle retraction assembly 400, a locking hook assembly 500 and a needle removal assembly 600. The exhaust needle assembly 300 includes a double-lumen tube fixing joint 320, a stainless steel double-lumen tube 340 and an exhaust needle 350. The exhaust needle 350 is installed in the stainless steel double-lumen tube 340.

[0050] The needle collection assembly 400 includes a needle collection member 410 , which is connected to the stainless steel double-lumen tube 340 and the exhaust needle 350 . Pressing the needle collection member 410 is used to store the exhaust needle 350 in the exhaust needle assembly 300 .

[0051] The locking hook assembly 500 includes a locking hook 510 for connecting to the needle reduction member 410;

[0052] The needle ejection assembly 600 includes a needle ejection member 610 . In the needle ejection state, the locking hook 510 is separated from the needle retraction member 410 ; in the needle retraction state, the locking hook 510 is connected to the needle retraction member 410 .

[0053] The hot steam ablation exhaust needle pushing mechanism does not require a motor drive, is low-cost, and has a simple and practical structure. It can be operated with one hand, and the needle can be manually retracted and removed at any time as needed, which can improve the safety of the product and avoid the inability to remove or retract the needle due to power outages or circuit failures.

[0054] See also Figures 2-4 As shown, in a specific embodiment, the exhaust needle assembly 300 also includes a double-lumen tube fixing joint 320, and a joint hole 321 is opened in the middle of the double-lumen tube fixing joint 320. The joint hole 321 is adapted to the shape of the longitudinal cross-section of the stainless steel double-lumen tube 340. The joint hole 321 is used to penetrate the stainless steel double-lumen tube 340 and is installed on the ablation device through the double-lumen tube fixing joint 320.

[0055] The double-lumen tube fixing joint 320 is further provided with a limiting platform 322 located in the joint hole 321 for axially limiting the stainless steel double-lumen tube 340 . The limiting platform 322 is provided with a through hole for the exhaust needle 350 to penetrate.

[0056] A heat shrink tube 310 is further provided on the stainless steel double-lumen tube 340 to protect the stainless steel double-lumen tube 340 and has a good lubricating effect.

[0057] Furthermore, the stainless steel double-lumen tube 340 includes a first lumen 341 and a second lumen 342. The length of the first lumen 341 is greater than the length of the second lumen 342. When the stainless steel double-lumen tube 340 is installed on the ablation device through the double-lumen tube fixing joint 320, the rear end wall of the second lumen 342 abuts against the limit platform 322, thereby limiting the axial position of the stainless steel double-lumen tube 340.

[0058] Furthermore, the second lumen 342 is used to penetrate the exhaust needle 350, and the exhaust needle 350 can move axially along the second lumen 342. An exhaust needle sheath tube 311 is also provided on the outside of the exhaust needle 350 to protect the exhaust needle 350 and prevent the exhaust needle 350 from directly rubbing against the stainless steel double lumen 340, causing damage to the exhaust needle 350.

[0059] The tip cap 330 is also included. The tip cap 330 is clamped with the front end of the stainless steel double-lumen tube 340 and is connected to the stainless steel double-lumen tube 340 so that the exhaust needle 350 can enter the tip cap 330 from the stainless steel double-lumen tube 340 .

[0060] Furthermore, the tip cap 330 is provided with a needle outlet hole 333 and a guide groove 331. The guide groove 331 is connected to the needle outlet hole 333. The other end of the guide groove 331 is connected to the stainless steel double-lumen tube 340. The guide groove 331 is arc-shaped. The front end of the exhaust needle 350 is along the guide groove 331 and is ejected from the needle outlet hole 333.

[0061] Furthermore, a needle guide sealing ring 332 is provided at the connection between the guide groove 331 and the stainless steel double-lumen tube 340. The needle guide sealing ring 332 is installed in the tip cap 330 and is mounted on the exhaust needle 350 to limit the axial position of the exhaust needle 350. During the needle removal and retraction process, the exhaust needle 350 moves more stably.

[0062] See also Figures 5-6 As shown, the front end of the exhaust needle 350 is provided with a bending section 351, the bending section 351 is arc-shaped, the head end 352 of the bending section 351 is provided with a rounded corner, and the middle part of the bending section 351 is provided with a laser ring mark 353. When the exhaust needle 350 is removed, the laser ring mark 353 passes through the needle hole 333. The laser ring mark 353 can be used to judge the extended length of the exhaust needle 350. There is at least one exhaust hole 354 on the bending section 351 for discharging steam.

[0063] In one specific embodiment, the axial width of the laser ring mark 353 is 2 mm, and the distance between the laser ring mark 353 and the head end 352 is 8.25±0.25 mm. When the laser ring mark 353 moves out of the pinhole 333, the total length of the exhaust needle 350 is 10.25±0.25 mm.

[0064] It is understandable that the axial width of the laser ring mark 353 can be set according to actual needs, and the distance between the laser ring mark 353 and the head end 352 can also be set according to actual needs, so that the exhaust needle 350 can extend to different lengths to meet surgical needs.

[0065] See also Figures 7-9 As shown, in this embodiment, the needle closing assembly 400 further includes a spring positioning column 420 and a needle closing spring 430 . The spring positioning column 420 is sleeved on the needle closing spring 430 . The needle closing spring 430 is used to provide elastic support to the needle closing member 410 .

[0066] Furthermore, a pressing portion 411 is provided at the outer end of the needle collecting member 410. The pressing portion 411 is arc-shaped, which makes it convenient for the doctor to place his index finger on the pressing portion 411. An exhaust needle card slot 412 is provided at the top of the needle collecting member 410. The tail end of the exhaust needle 350 is embedded in the exhaust needle card slot 412 and then fixed by UV adhesive curing to prevent the tail end of the exhaust needle 350 from moving.

[0067] A double-lumen tube insertion hole 413 is provided below the exhaust needle slot 412 for passing through the first lumen 341 of the stainless steel double-lumen tube 340. The needle collecting member 410 and the stainless steel double-lumen tube 340 can move relative to each other in the axial direction. When the needle collecting member 410 moves back and forth, the exhaust needle 350 moves back and forth together to realize the functions of needle removal and needle collection.

[0068] A positioning column socket 414 is provided below the double-lumen tube socket 413. One end of the spring positioning column 420 and the needle-retracting spring 430 is inserted into the positioning column socket 414. The other end of the spring positioning column 420 is fixed. When the needle-retracting part 410 moves backward, it will squeeze the needle-retracting spring 430 to cause deformation.

[0069] A first sliding block 415 is symmetrically provided on the upper side wall of the needle narrowing member 410 , and a second sliding block 416 is symmetrically provided on the lower side wall of the needle narrowing member 410 .

[0070] When the first slider 415 and the second slider 416 move, the positions on the left and right sides are relatively fixed, so that the forward and backward movement position of the needle retracting member 410 is relatively fixed. In the needle-out state, the length of the exhaust needle 350 extending to the outside of the tip cap 330 is a fixed value. In the needle-retracting state, the reset position of the exhaust needle 350 is also fixed.

[0071] A buckle 417 cooperating with the locking hook 510 is further provided on the needle reduction member 410 near the locking hook assembly 500 .

[0072] Preferably, the needle retracting member 410 is located at the front side of the ablation device. When the doctor holds the ablation device, it is located at the position of the index finger, which is ergonomic and can realize the needle retracting and needle removal functions with one hand, and the operation is simple.

[0073] See also Figure 10 As shown, the spring positioning column 420 includes a columnar structure 421, which is a columnar structure for inserting into the needle retraction spring 430. A first protrusion 422 is provided at one end of the column 421. The first protrusion 422 is cylindrical, and the diameter of the first protrusion 422 is larger than the diameter of the column 421. The outer wall of the first protrusion 422 abuts against the needle retraction spring 430 and is used to limit the needle retraction spring 430. The other side end of the first protrusion 422 is connected to the second protrusion 423. A positioning groove 424 is provided between the second protrusion 423 and the first protrusion 422. A fixing hole 425 is provided at the positioning groove 424. The fixing hole 425 is used to pass a screw to fix the spring positioning column 420 to the ablation device.

[0074] See also Figure 11 As shown, the locking hook assembly 500 further includes a locking hook 510 and a locking hook torsion spring 520 . The locking hook 510 is provided with a rotating shaft 511 . The locking hook torsion spring 520 is sleeved on the rotating shaft 511 . The rotating shaft 511 is rotated to connect to the ablation device.

[0075] A first connecting portion 512 and a second connecting portion 513 are provided on the rotating shaft 511. The first connecting portion 512 and the second connecting portion 513 form an angle of 90±5 degrees in the radial direction of the rotating shaft 511. The first connecting portion 512 is a snap-on structure for connecting to the snap 417, and the second connecting portion 513 is a columnar structure.

[0076] See also Figures 12-13 As shown, the needle removal assembly 600 further includes a needle removal spring 620 and a spring baffle 630 . The spring baffle 630 is fixed to the ablation device and is used to limit the axial position of the needle removal spring 620 .

[0077] Furthermore, a spring positioning tube 611 is provided on the inner side of the needle ejection member 610, and one end of the needle ejection spring 620 is mounted on the spring positioning tube 611 for radially limiting the needle ejection spring 620. A bevel 612 is also provided on the inner wall of the needle ejection member 610, and the bevel 612 contacts the second connecting portion 513, and the bevel 612 is at an angle of 30-60 degrees. A protrusion 613 is provided on the end of the bevel 612 away from the spring positioning tube 611.

[0078] Specifically, in the needle-retracting state, the second connecting portion 513 contacts the side wall of the protruding portion 613, and the protruding portion 613 limits the second connecting portion 513;

[0079] In the needle-out state, the needle-out member 610 is pressed, and the needle-out member 610 moves toward the spring baffle 630. The needle-out spring 620 is compressed, and the second connection part 513 is pushed to rotate along the axial direction of the rotating shaft 511 through the bevel 612. At the same time, the first connection part 512 also rotates along the axial direction of the rotating shaft 511. When the snap-like structure of the first connection part 512 is separated from the snap 417, the needle-out member 410 is pushed to move along the axial direction of the needle-out spring 430 under the action of the compression force of the needle-out spring 430. The needle-out member 410 drives the exhaust needle 350 to pass through the needle-out hole 333, thereby instantly triggering the needle to be ejected, and realizing the needle-out action through mechanical coordination.

[0080] See also Figure 14-16 As shown, an ablation device is provided, including the above-mentioned pushing mechanism, and also including a left handle shell 100 and a right handle shell 200 connected to the left handle shell 100. The pushing mechanism is installed on the left handle shell 100, fixed with screws, and then covered with the right handle shell 200 to complete the installation of the ablation device.

[0081] Furthermore, the inner walls of the left handle shell 100 and the right handle shell 200 are both provided with limiting mechanisms, which are connected to the needle shrinking member 410 and are used to limit the forward and backward movement positions of the needle shrinking member 410 .

[0082] In a specific embodiment, the left handle shell 100 is provided with a first mounting hole 110 for mounting the double-lumen tube fixing joint 320 , and the limiting mechanism provided on the left handle shell 100 includes a first sliding groove 120 and a second sliding groove 140 .

[0083] A first sliding groove 120 is provided on the inner wall of the left handle shell 100 near the first mounting hole 110 . The first sliding groove 120 is used to connect to the first slider 415 on one side of the needle narrowing member 410 . The first slider 415 moves along the first sliding groove 120 .

[0084] The left handle shell 100 is provided with a first needle narrowing member installation hole 130 for installing the needle narrowing member 410 .

[0085] A second slide groove 140 is provided on the inner wall of the left handle shell 100 near the first needle closing member mounting hole 130 . The second slide groove 140 is used to connect the second slider 416 on one side of the needle closing member 410 . The second slider 416 can move along the second slide groove 140 .

[0086] The left shell 100 of the handle is provided with a needle ejection member installation hole 150 at the thumb position for holding the ablation device. The needle ejection member installation hole 150 is used for installing the needle ejection member 610 .

[0087] Spring baffle fixing holes 180 are provided on both sides of the needle ejection mounting hole 150. The spring baffle fixing holes 180 are used to install the spring baffle 630. Screws are passed through the through holes at both ends of the spring baffle 630 and then screwed into the spring baffle fixing holes 180 to fix the spring baffle 630 to the left handle shell 100.

[0088] A first sleeve 170 is provided above the needle ejector mounting hole 150 and is fixed to the inner wall of the left handle shell 100 . The first sleeve 170 is used to mount the rotating shaft 511 , which can rotate axially along the first sleeve 170 .

[0089] A first support column 160 is provided above the first sleeve 170. The first support column 160 is fixed to the inner wall of the left shell 100 of the handle. A groove is provided at the end of the first support column 160 away from the left shell 100 of the handle. A hole is provided at the bottom of the groove. The groove is used to install the spring positioning column 420. During installation, the spring positioning column 420 is embedded in the groove between the first protrusion 422 and the second protrusion 423, and then the screw is passed through the fixing hole 425 and connected to the hole at the bottom of the groove to complete the installation of the spring positioning column 420.

[0090] In a specific embodiment, the right shell 200 of the handle is provided with a second mounting hole 210, and the second mounting hole 210 cooperates with the first mounting hole 110 to install the double-lumen tube fixing joint 320, and the limiting mechanism arranged on the left shell 100 of the handle includes a third slide groove 220 and a fourth slide groove 240.

[0091] A third sliding groove 220 is provided on the inner wall of the right handle shell 200 near the second mounting hole 210 . The third sliding groove 220 is used to connect to the first slider 415 on the other side of the needle narrowing member 410 . The first slider 415 moves along the third sliding groove 220 .

[0092] Furthermore, the first slide groove 120 and the third slide groove 220 have the same shape, and the two slide grooves have the same length and width, which are used to limit the first slider 415. In the needle-retracting state, the first slider 415 is located at the leftmost side of the first slide groove 120 and the third slide groove 220. In the needle-retracting state, the first slider 415 is located at the rightmost side of the first slide groove 120 and the third slide groove 220, thereby limiting the forward and backward movement position of the needle-retracting part 410.

[0093] The right handle shell 200 is provided with a second needle-retracting member installation hole 230 for installing the needle-retracting member 410. The needle-retracting member 410 can move along the pressing direction of the index finger.

[0094] A fourth slide groove 240 is provided on the inner wall of the right handle shell 200 near the second needle closing member mounting hole 230 . The fourth slide groove 240 is used to connect the second slider 416 on the other side of the needle closing member 410 . The second slider 416 can move along the fourth slide groove 240 .

[0095] Furthermore, the second slide groove 140 and the fourth slide groove 240 have the same shape, and the two slide grooves have the same length and width, which are used to limit the second slider 416. In the needle-retracting state, the second slider 416 is located at the leftmost side of the second slide groove 140 and the fourth slide groove 240. In the needle-retracting state, the second slider 416 is located at the rightmost side of the second slide groove 140 and the fourth slide groove 240, thereby limiting the forward and backward movement position of the needle-retracting part 410.

[0096] The first, second, third and fourth sliding grooves 120, 140, 220 and 240 limit the forward and backward movement of the needle collecting member 410, so that the forward and backward movement position of the needle collecting member 410 remains unchanged and the movement of the needle collecting member 410 is more stable.

[0097] A needle ejection member installation groove 250 is provided on the right shell 200 of the handle corresponding to the needle ejection member installation hole 150. The needle ejection member installation groove 250 is used to limit the needle ejection member 610. When the thumb presses the needle ejection member 610, it can move along the direction of the thumb pressing.

[0098] A second sleeve 270 is provided above the needle ejector mounting groove 250 and is fixed to the inner wall of the right handle shell 200 . The second sleeve 270 is used to mount the rotating shaft 511 , which can rotate axially along the second sleeve 270 .

[0099] A second support column 260 is provided above the second sleeve 270. The second support column 260 is fixed to the inner wall of the right shell 200 of the handle. A protrusion is provided at one end of the second support column 260 away from the right shell 200 of the handle. The protrusion is used to be inserted into the positioning groove 424 to limit the spring positioning column 420 and improve the stability of the spring positioning column 420.

[0100] In this embodiment, a pushing mechanism is installed in the ablation device, and the needle ejection part 610 is pressed on the side of the handle to eject the needle, which is convenient for the doctor to operate. No motor drive or electromagnetic drive is required. A mechanical pushing mechanism is used to instantly stimulate the needle ejection. The needle ejection length is stable and the depth of insertion into the prostate tissue is controllable, thereby improving the effectiveness of the treatment area.

[0101] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A hot steam ablation exhaust needle pushing mechanism, characterized in that: It comprises an exhaust needle assembly (300), a needle collection assembly (400), a locking hook assembly (500) and a needle removal assembly (600). The exhaust needle assembly (300) comprises a stainless steel double-lumen tube (340) and an exhaust needle (350), wherein the exhaust needle (350) is installed in the stainless steel double-lumen tube (340); The needle collection assembly (400) includes a needle collection piece (410), the needle collection piece 410 is provided with a buckle (417), the needle collection piece (410) is connected to the stainless steel double-lumen tube (340) and the exhaust needle (350), and the needle collection piece (410) is pressed to store the exhaust needle (350) in the exhaust needle assembly (300), and the tail end of the exhaust needle (350) is fixed on the needle collection piece (410); in the needle-out state, the needle collection piece (410) moves forward, driving the exhaust needle (350) to extend to the outside of the tip cap (330); in the needle-out state, the needle collection piece (410) moves backward, driving the exhaust needle (350) to return to the inside of the tip cap (330); The locking hook assembly (500) includes a locking hook (510) and a locking hook torsion spring (520). The locking hook (510) is used to connect the needle-collecting member (410). The locking hook (510) is provided with a rotating shaft (511). The locking hook torsion spring (520) is sleeved on the rotating shaft (511). The rotating shaft (511) is provided with a first connecting portion (512) and a second connecting portion (513). The first connecting portion (512) is a buckle-shaped structure and is used to connect with the buckle (417). The needle ejection assembly (600) includes a needle ejection member (610). The inner side wall of the needle ejection member (610) is further provided with a bevel (612). The bevel (612) contacts the second connecting portion (513). In the needle ejection state, the locking hook (510) is separated from the needle retracting member (410); in the needle retracting state, the locking hook (510) is connected to the needle retracting member (410).

2. The hot steam ablation exhaust needle pushing mechanism according to claim 1, characterized in that: The exhaust needle assembly (300) further includes a double-lumen tube fixing joint (320) for fixing the stainless steel double-lumen tube (340); It also includes a tip cap (330), which is clamped to the front end of the stainless steel double-lumen tube (340), and the tip cap (330) is in communication with the stainless steel double-lumen tube (340).

3. The hot steam ablation exhaust needle pushing mechanism according to claim 1, characterized in that: The needle collection assembly (400) further comprises a spring positioning column (420) and a needle collection spring (430), wherein the spring positioning column (420) is mounted on the needle collection spring (430), and the needle collection spring (430) is used to provide elastic support to the needle collection member (410), thereby pushing the needle collection member (410) to move forward.

4. The hot steam ablation exhaust needle pushing mechanism according to claim 1, characterized in that: The forward and backward movement position of the needle-retracting member (410) is relatively fixed, and in the needle-retracting state, the length of the exhaust needle (350) extending to the outside of the tip cap (300) is a fixed value.

5. The hot steam ablation exhaust needle pushing mechanism according to claim 1, characterized in that: The first connecting portion (512) and the second connecting portion (513) form an angle of 90±5 degrees in the radial direction of the rotating shaft (511).

6. The hot steam ablation exhaust needle pushing mechanism according to claim 1, characterized in that: The needle removal assembly (600) further comprises a needle removal spring (620) and a spring baffle (630). The spring baffle (630) is fixed to the ablation device and is used to limit the axial position of the needle removal spring (620).

7. The hot steam ablation exhaust needle pushing mechanism according to claim 1, characterized in that: The hypotenuse (612) is at an angle of 30-60 degrees.

8. An ablation device, characterized in that: The device comprises the pushing mechanism according to any one of claims 1 to 7, and further comprises a left handle shell (100) and a right handle shell (200) connected to the left handle shell (100). The pushing mechanism is installed on the left handle shell (100), fixed with screws, and then covered with the right handle shell (200), thereby completing the installation of the ablation device.

9. The ablation device according to claim 8, characterized in that The inner walls of the left handle shell (100) and the right handle shell (200) are both provided with limiting mechanisms, which are connected to the needle collecting member (410) and are used to limit the forward and backward movement positions of the needle collecting member (410).

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