A steep pulse array needle and its operation method

Abstract

The present invention relates to the technical field of medical devices, and specifically, to a steep pulse array needle and an operation method thereof, including: a handle, one end of the handle is cooperatively connected with the tail of the needle rod through an extension rod, a plurality of array needles are provided at the head of the needle rod, and the heads of the array needles are placed in a protective sleeve; a spacing adjustment component, which is used to adjust the spacing between the plurality of array needles, so as to adjust the ablation area corresponding to the array needles; a length adjustment component, which is used to control the limited movement of the protective sleeve along the axial direction of the array needles. By adjusting the spacing between the array needles, the present application overcomes the problem that current steep pulses cannot be used for surgery under a laparoscope, greatly enhances the effect of treating tumors, and at the same time ensures the accuracy of the working length L of the array needles, avoiding excessive puncture and injuring human organs. At the same time, the angle of the array needles can be adjusted, so that the array needles can closely adhere to the lesion area to ablate the lesion.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular, to a steep pulse array needle and an operation method thereof. Background Art

[0002] The inner diameter of the existing laparoscope is fixed. After the ablation needle is inserted, the ablation area is fixed. However, after the needle is inserted, it is often found that the tumor area is different from the expected one, either larger or smaller. It is necessary to adjust the distance between the ablation needles to adjust the coverage area of the ablation needles. However, in the prior art, the distance between the ablation needles and the working length are not adjustable, which cannot meet the current technical requirements.

[0003] The protection device of a radio frequency array needle with the authorization announcement number of CN205163233 U discloses a protection device of a radio frequency array needle. The radio frequency array needle includes a needle handle, an ablation needle fixing seat fixedly opposite to the needle handle, and four ablation needles arranged in two rows and two columns and fixedly opposite to the ablation needle fixing seat. The protection device includes: a protective sleeve sleeved on the four ablation needles and slidably matched with each ablation needle; a return spring arranged between the four ablation needles, and both ends of the return spring respectively abut against the protective sleeve and the ablation needle fixing seat; a pull wire, one end of which is fixed to the protective sleeve and the other end extends to the needle handle here, and a control mechanism arranged on the needle handle and cooperating with the end of the pull wire extending into the needle handle to control the retraction and release of the pull wire. The utility model can effectively protect the needle tip by setting the protective sleeve, prevent the needle handle from injuring human organs, and prevent the ablation needle tip from being contaminated; through the mutual cooperation of the return spring, the pull wire and the control mechanism, the protective sleeve can be easily switched between two states.

[0004] The utility model patent with the authorization announcement number of CN 204698678 U discloses a nanosecond pulse tumor ablation array electrode, which includes a positive electrode, a negative electrode, an insulating shell, and an electrode handle. One end of the insulating shell is provided with the electrode handle, the outer wall of the electrode handle is covered with an insulating layer, the other end of the electrode handle is an electrode handle base, and several electrode needles made of conductive materials extend out from the outer end face of the electrode handle base. The central electrode needle is the positive electrode, and the surrounding electrode needles are evenly arranged along the circumferential direction with the central electrode needle as the center, and the surrounding electrode needles are all negative electrodes. The utility model provides a piercing type array electrode, which fully adapts to the anatomical characteristics of the convex growth of the surface tumor, can puncture the tumor body, fix the solid tumor in the middle of the electrode needle array, and release a uniform electric field, so that the tumor can obtain sufficient electric field coverage.

[0005] The utility model patent with the authorization announcement number CN 205163234 U discloses an open - type radio - frequency array needle, which includes a needle handle, and four ablation needles arranged in two rows and two columns and fixed on the needle handle. The needle handle further includes a first fixing block for fixing the ablation needles. The first fixing block has a through - hole for the ablation needles to pass through. Both the left shell and the right shell have a groove arranged oppositely, and the two grooves form an installation cavity for installing the first fixing block. The radio - frequency array needle further includes a second fixing block sleeved on all the ablation needles, and the second fixing block is relatively fixed to each ablation needle. The beneficial effects of the present utility model are as follows: The design of four ablation needles arranged in two rows and two columns can increase the ablation range, shorten the ablation time, and thus reduce the surgical risk; The first fixing block with a through - hole can fix each ablation needle and ensure the relative distance between each ablation needle; By setting the second fixing block, each ablation needle can be better fixed, preventing the ablation needles from being bent or tilted relatively, so as to ensure the reliable and stable operation of the ablation needles.

[0006] None of the above - mentioned patents can solve the foregoing problems. Summary of the Invention

[0007] The purpose of the present invention is to solve the deficiencies of the prior art, and provide a steep - pulse array needle that can penetrate into the human body under a laparoscope, and the spacing and length of which are adjustable to adapt to different tumor areas.

[0008] To achieve the above - mentioned purpose, the present invention provides a steep - pulse array needle, including

[0009] a handle, one end of the handle is cooperatively connected with the tail of the needle rod through an extension rod, the head of the needle rod is provided with a plurality of array needles, and the heads of the array needles are placed in a protective sleeve;

[0010] a spacing adjustment component, the spacing adjustment component includes an operation part, a transmission part and an execution part connected in sequence. The spacing adjustment component is used to adjust the spacing between a plurality of the array needles, so as to adjust the ablation area corresponding to the array needles. The operation part is arranged inside the handle, and the execution part is arranged at the tail of the array needles. By manually controlling the operation part, the transmission part drives the execution part to expand the array needles from the initial position to a preset threshold position, and reversely operating the operation part, the array needles are retracted from the expanded position to the initial position;

[0011] a length adjustment component, the length adjustment component is used to control the limiting movement of the protective sleeve along the axial direction of the array needles. By controlling the length adjustment component to move the protective sleeve, the working length of the array needles is adjusted.

[0012] Preferably: It further includes an angle adjustment component, and the angle adjustment component is used to control the included angle between the needle rod and the extension rod, so that the needle rod and the array needles face the lesion area.

[0013] Preferably, the operation part includes a spacing turntable which is fixed in the handle through a turntable groove and is rotationally limited in the turntable groove.

[0014] The transmission part includes a turntable rotating shaft which is coaxially arranged in the extension rod. One end of the turntable rotating shaft is fixed to the spacing turntable, and the other end is fixed to a universal joint which is arranged at the connection between the extension rod and the needle rod. The universal joint is connected with one end of a large gear rotating shaft through an adapter. The large gear rotating shaft is coaxially arranged inside the needle rod, and the other end of the large gear rotating shaft is connected with the execution part.

[0015] When the spacing turntable rotates, it can drive the turntable rotating shaft to rotate, thereby driving the large gear rotating shaft to rotate. The universal joint is used to ensure that when there is an angle between the extension rod and the needle rod, the rotation of the spacing turntable can still be synchronously transmitted to the large gear rotating shaft.

[0016] Preferably, the execution part includes a large gear and a plurality of small gears. The number of small gears corresponds to the number of array needles. The large gear is fixed on a gear fixing seat sleeved on the large gear rotating shaft. A plurality of the small gears are fixed on the gear fixing seat through small gear rotating shafts, and the large gear meshes with a plurality of the small gears simultaneously.

[0017] The execution part further includes a plurality of swing arms which are connected with one end of the small gear rotating shafts. The array needles are sleeved inside the swing arms. The swing arms are arranged inside a swing arm fixing seat which is provided with a plurality of swing arm moving grooves for the swing arms to expand. When the small gears rotate, they drive the small gear rotating shafts to rotate, thereby driving the swing arms to expand in the swing arm moving grooves, and the array needles expand along with the swing arms.

[0018] Preferably, one end of the swing arm fixing seat is in plug-in fit with the gear fixing seat, and the other end of the swing arm fixing seat is in plug-in fit with a swing arm fixing cover plate. The large gear rotating shaft is also provided with a first limiting tube and a second limiting tube. The first limiting tube is arranged on one side of the swing arm fixing cover, and the second limiting tube is arranged on one side of the gear fixing seat. The first limiting tube and the second limiting tube are used to fasten between the gear fixing seat and the swing arm fixing cover plate and have no axial movement relative to the large gear rotating shaft.

[0019] Preferably, the operation part further includes a push button assembly which includes a push button and a slider. The push button and the slider are connected in cooperation. The handle includes a left shell and a right shell, and the handle is provided with a chute in which the push button assembly slides.

[0020] Preferably: a first limit plate and a second limit plate are provided on one side of the spacing rotating disk, the first limit plate and the second limit plate are hinged at a certain angle, and when the spacing rotating disk rotates, the first limit plate abuts against the first limit groove on the right shell to trigger the limit, and the second limit plate abuts against the second limit groove on the left shell to trigger the limit;

[0021] When the limit is triggered, the cylindrical boss on the slider is aligned with the positioning hole on the spacing dial, and the push button is pushed to fix the spacing dial and lock the position of the array needles at the same time.

[0022] Preferably: the length adjustment assembly includes a protective shaft, a protective shaft limit block and a sealing ring, the protective shaft is arranged at one end of the needle rod, and the protective shaft is coaxially arranged with the large gear shaft, the protective shaft limit block is arranged at the tail of the protective shaft, the protective shaft limit block is inserted and fixed to the front section of the swing arm fixed cover plate, the tail of the protective shaft is provided with an annular groove, the annular groove is used to fix the sealing ring, the outer wall of the sealing ring is tightly fitted with the inner wall of the large gear shaft to form a closed cavity, a through hole is provided on one side of the large gear shaft, the through hole is used to connect the pipeline, and the tail of the pipeline is connected to the steep pulse generator.

[0023] Preferably: the pipeline includes a water inlet pipeline and a water outlet pipeline,

[0024] When the array needle is in the protection state, the water outlet pipeline is closed, the water inlet pipeline is connected to the steep pulse generator, and water is pumped into the closed cavity through the water inlet pipeline, so that the protection shaft drives the protection sleeve to move away from the needle rod end to the left limit position and maintain it, at which time the head of the array needle is completely in the needle body movable groove of the protection sleeve;

[0025] When the array needle is in working state, the steep pulse generator draws water from the water inlet pipeline, so that the protection shaft drives the protection sleeve to move rightward to a specified position, the specified position is determined according to actual needs, and the stroke of the protection sleeve is the actual working length of the array needle;

[0026] When the array needle ends its working state, the steep pulse generator pumps water from the water inlet pipe, so that the protection shaft drives the protection sleeve to move to the right limit position toward the end close to the needle rod, opens the water outlet pipe, and pumps water into the water inlet pipe until water flows out of the water outlet pipe, thereby restoring the initial state.

[0027] Preferably, the angle adjustment assembly includes an angle turntable, an angle adjustment large gear, an angle adjustment small gear and a double gear.

[0028] The angle dial is arranged in a fixing groove of the right shell of the handle, and the angle dial is fixedly connected to the angle adjustment gear through a rotating shaft, the angle adjustment gear is meshed with the double gear, and the double gear is meshed with the angle adjustment pinion at the same time;

[0029] It also includes a support seat and a worm shaft, one end of the worm shaft is fixedly connected to the angle adjustment pinion, the other end of the worm shaft passes through the support seat and cooperates with the worm, a rotating base is provided between the worm and the support seat, the worm is meshed with a worm wheel, a worm wheel shaft is sleeved on the middle part of the worm wheel, the worm wheel shaft passes through the rotating base and the rotating bracket and is press-fitted and fixed, and the front section of the rotating bracket is fixedly connected to the needle rod;

[0030] The rotating base and the supporting base are arranged on the inner side of the extension tube, and the extension tube is coaxially sleeved in the extension rod.

[0031] Preferably: when the angle dial rotates, it drives the angle adjustment gear, the double gear and the angle adjustment pinion to rotate, the angle adjustment pinion drives the worm shaft to rotate and transmits the motion to the worm, the worm drives the worm wheel to rotate, thereby driving the rotating bracket to rotate, so that the extension rod forms an angle with the needle rod to adjust the angle of the array needle.

[0032] Preferably: the pinion shaft passes through the first shaft fixing hole of the gear fixing seat, the second shaft fixing hole of the swing arm fixing seat and the fourth shaft fixing hole of the swing arm fixing cover plate, and rotates freely in the holes, and the pinion shaft is fixedly connected to the third shaft fixing hole of the swing arm.

[0033] Preferably: a power line is welded at the tail of the array needle, and the power line passes through the third wire hole of the swing arm fixing seat, the wire groove of the gear fixing seat, the second wire hole of the rotating base and the first wire hole of the support seat and then enters the handle, and the power line is connected to the steep pulse generator through a cable.

[0034] Preferably, the water inlet pipeline and the water outlet pipeline pass through the second wire hole of the rotating base and the first wire hole of the support seat, enter into and pass out of the handle, and the water inlet pipeline is connected to the steep pulse generator.

[0035] Preferably: the handle also includes a button and a button board, the button board is connected with a signal line, the signal line is connected to the steep pulse generator through a cable, the button acts on the button board, and a signal is sent to the steep pulse generator through the signal line via the cable, the steep pulse generator outputs power to the array needle through the cable via the power line to ablate the lesion.

[0036] The present invention also provides an operation method for a steep pulse array needle, and the specific steps are as follows:

[0037] S1: Control the steep pulse generator to move the protective sleeve to the leftmost end, move the push button assembly to the right to unlock the pitch turntable, rotate the pitch turntable of the handle counterclockwise to retract each needle body of the array needle into the needle body placement groove of the protective sleeve, and move the push button to the left to lock the pitch turntable;

[0038] S2: Under medical imaging, deliver the handle forward to make the extension rod pass through the trocar;

[0039] S3: According to the location of the lesion, pre-adjust the angle turntable of the handle to make the needle array initially face the lesion;

[0040] S4: Move the push button to the right to unlock the pitch turntable, rotate the pitch turntable of the handle, and adjust the working pitch d1 of the array needle to a suitable value according to the specific situation of the lesion, and move the push button to the left to lock the pitch turntable;

[0041] S5: Preset the working length L of the array needle through the steep pulse generator according to the specific situation of the lesion;

[0042] S6: Insert the array needle into the lesion under medical imaging. During the insertion process, the angle of insertion of the array can be appropriately adjusted through the angle turntable until the protective sleeve is in close contact with the lesion, and then press the button to ablate the lesion area;

[0043] S7: After ablation, under medical imaging, retract the handle backward to completely withdraw the array needle from the lesion area, control the steep pulse generator to move the protective sleeve to the left limit, move the push button to the right to unlock the pitch turntable, rotate the pitch turntable of the handle to retract each needle body of the array needle into the needle body placement groove of the protective sleeve, move the push button to the left to lock the pitch turntable, adjust the angle turntable to make the extension rod and the needle rod substantially coaxial, and then continue to retract the handle backward to completely withdraw the instrument from the trocar.

[0044] Compared with the prior art, the technical solution proposed in the present application has the following beneficial effects: By adjusting the pitch between the array needles, the problem that the current steep pulse cannot be used for surgery under laparoscopy is overcome. By adjusting the pitch between the array needles, different tumor areas can be dealt with, greatly enhancing the effect of treating tumors. At the same time, the required working length L of the array needle is preset in advance, and then under medical imaging, the needle body of the array needle is inserted into the lesion. This way of inserting the needle ensures the accuracy of the working length L of the array needle to a certain extent, avoids excessive puncture and injury to human organs, improves safety, and at the same time the angle of the array needle is adjustable, enabling the array needle to closely adhere to the lesion area for ablation of the lesion. Description of the Drawings

[0045] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments read in conjunction with the accompanying drawings:

[0046] Figure 1 Overall structure diagram of the steep pulse array needle of the present invention;

[0047] Figure 2 Of the present invention Figure 1 Partial enlarged view;

[0048] Figure 3 Front view of the steep pulse array needle of the present invention;

[0049] Figure 4 Side view of the steep pulse array needle of the present invention;

[0050] Figure 5 Of the present invention Figure 3 A - A sectional view;

[0051] Figure 6 Of the present invention Figure 3 B - B sectional view;

[0052] Figure 7 Of the present invention Figure 3 C - C sectional view;

[0053] Figure 8 Of the present invention Figure 7 Partial enlarged view of the front section;

[0054] Figure 9 Of the present invention Figure 7 Partial enlarged view of the rear section;

[0055] Figure 10 Of the present invention Figure 8 D - D sectional view;

[0056] Figure 11 Structure diagram of the handle of the present invention;

[0057] Figure 12 Of the present invention Figure 11 Partial enlarged view;

[0058] Figure 13 Of the present invention Figure 11 Top view;

[0059] Figure 14 Of the present invention Figure 11 Second top view;

[0060] Figure 15 Spacing schematic diagram of the array needle of the present invention;

[0061] Figure 16Cross-sectional view of the length adjustment component of the present invention;

[0062] Figure 17 Schematic diagram of the maximum working length of the steep pulse array needle of the present invention;

[0063] Figure 18 Exploded view of the handle structure of the present invention;

[0064] Figure 19 Exploded view of the extension rod structure of the present invention;

[0065] Figure 20 Exploded view of the needle rod structure of the present invention. Detailed implementation manners

[0066] The following will clearly and completely describe and discuss the technical solutions in the embodiments of the present invention in conjunction with the drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all of the examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0067] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0068] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0069] A steep pulse array needle includes a handle. One end of the handle is cooperatively connected with the tail of the needle rod through an extension rod. The head of the needle rod is provided with a plurality of array needles, and the heads of the array needles are placed in a protective sleeve;

[0070] It further includes a spacing adjustment component, a length adjustment component and an angle adjustment component. The spacing adjustment component is used to adjust the spacing between the array needles, the length adjustment component is used to adjust the actual working length of the array needles, and the angle adjustment component is used to control the included angle between the needle rod and the extension rod, so as to adjust the angle between the needle rod and the target area.

[0071] See the appendix Figure 1-2 As shown, the technical solution of the present invention provides a steep pulse array needle, which includes a handle 1, an extension rod 2, a needle rod 3, an array needle 4, a protective sleeve 5, a cable 6 and a pipeline 7.

[0072] See Figures 3 to 14 and Figure 18 As shown, in this embodiment, the structure of the angle adjustment component is as follows: The handle 1 includes a left shell 12 and a right shell 13, which are fixed by screws. The handle 1 further includes an angle turntable 8, an angle adjustment large gear 40, a double gear 41, and an angle adjustment small gear 42. The extension rod 2 includes a support seat 38, an extension tube 37, a worm shaft 36, a worm 35-1, a worm gear 34-1, a worm gear shaft 33, a rotating base 32, a rotating bracket 31, and a fixing screw 27. The needle rod 3 includes a gear fixing seat 24.

[0073] Specifically, after the angle turntable 8 is fixed to the rotating shaft of the angle adjustment large gear 40, it is placed in the first fixing groove 133 of the right shell 13. The double gear 41 is placed in the second fixing groove 134 of the right shell 13. The second small gear 411 of the double gear 41 meshes with the angle adjustment large gear 40, and the second large gear 412 of the double gear meshes with the angle adjustment small gear 42. The boss 371 of the extension tube 37 is inserted into the groove 132 of the right shell 13. A rotating base 32 and a support seat 38 are centrally arranged in the extension tube 37. The rotating base 32 and the support seat 38 are respectively fixed to the extension tube 37 by screws 27. A worm shaft 36 is eccentrically arranged in the extension tube 37. The right end of the worm shaft 36 is fixed with an angle adjustment small gear 42, and the left end passes through the support seat 38 and the rotating base 32 and is fixed with a worm 35-1, which meshes with the worm gear 34-1. The worm gear shaft 33-1 passes through the rotating base 32 and is press-fitted and fixed to the worm gear 34-1 and the rotating bracket 31 respectively. The worm gear shaft 33-2 passes through the rotating base 32 and the rotating bracket 31 and is press-fitted and fixed. The left end of the rotating bracket 31 is fixed with the needle rod 3.

[0074] Adjustment of the working angle of the array needle: As Figure 13 and Figure 14 shown, further see Figure 19, rotate the angle turntable 8 from bottom to top. The angle turntable 8 drives the angle adjustment large gear 40 to rotate from bottom to top. The angle adjustment large gear 40 drives the second small gear 411 of the double gear 41 to rotate from top to bottom. At this time, the second large gear 412 of the double gear 41 rotates synchronously with the second small gear 411. The second large gear 412 of the double gear drives the angle adjustment gear 42 to rotate from bottom to top. The motion is transmitted to the worm 35-1 through the worm rotating shaft 36. The worm 35-1 rotates from bottom to top, and the worm wheel 34-1 meshing with the worm 35-1 rotates counterclockwise. The rotating bracket 31 fixed to the worm wheel 34-1 rotates counterclockwise, and the needle bar 3 fixed to the rotating bracket 31 rotates counterclockwise; rotate the angle turntable 8 from top to bottom, then the needle bar 3 rotates clockwise. The transmission ratio of the worm 35-1 and the worm wheel 34-1 is the same as the total transmission ratio of the angle adjustment small gear 42, the double gear 41, and the angle adjustment large gear 40. The rotation angles of the angle turntable 8 and the needle bar 3 are synchronous. The worm and worm wheel transmission composed of the worm wheel 34-1 and the worm 35-1 has self-locking property, that is, the operator can only adjust the angle turntable 8 to transmit the rotation to the worm 35-1, and then the worm 35-1 drives the worm wheel 34-1 to rotate, and finally drives the needle bar 3 to rotate synchronously. However, when the needle bar receives an external force, the worm wheel 35-1 cannot drive the worm 34-1 to rotate, so as to achieve the effect of locking after angle adjustment and positioning, which is convenient for doctors to accurately adjust the working angle of the array needle and lock it.

[0075] See Figure 19As shown in the figure, the structure of the spacing adjustment component in this embodiment is as follows: The operation part is a spacing turntable 9 and a push button assembly 10 arranged on the handle 1. The push button assembly 10 includes a push button 101 and a slider 102, and the push button 101 and the slider 102 are fixed by gluing; the left and right shells are provided with a turntable groove 135, and the spacing turntable 9 can rotate in the turntable groove 135. The left and right shells are also provided with a sliding groove 137, and the push button assembly 10 can slide in the sliding groove 137; the transmission part is an extension rod 2, and the extension rod 2 is specifically provided with a turntable rotating shaft 30, a universal joint 29, and an adapter 28; the needle rod 3 also includes a fixing screw 27, an outer sleeve 26, a large gear rotating shaft 25, a second limiting tube 17-2, and a gear fixing seat 24. The execution part is a first large gear 23, a first small gear 22, a small gear rotating shaft 20, a swing arm fixing seat 21, a swing arm 19, a swing arm fixing cover plate 18, and a first limiting tube 17-1. Specifically, the turntable rotating shaft 30 is coaxially arranged inside the extension tube 37. One end of the turntable rotating shaft 30 is fixed to the spacing turntable 9, and the other end sequentially passes through the support seat 38 and the rotating base 32 and is then fixed to the universal joint 29. The other end of the universal joint 29 is fixed to the adapter 28. The large gear rotating shaft 25 is coaxially arranged inside the outer sleeve 26. One end of the large gear rotating shaft 25 is fixed to the adapter 28, and the other end passes through the swing arm fixing cover plate 18. The function of the universal joint 29 is that when there is a certain angle between the extension rod 2 and the needle rod 3, the rotation of the spacing turntable 9 can still be synchronously transmitted to the large gear rotating shaft 25.

[0076] The first large gear 23 is fixed on the large gear rotating shaft 25 and is located in the large gear fixing groove 242 of the gear fixing seat 24. The first small gear 22 is fixed on the small gear rotating shaft 20 and is located in the small gear fixing groove 241 of the gear fixing seat 24. The first large gear 23 and the first small gear 22 are in meshing engagement.

[0077] The pinion shaft 20 passes through the first shaft fixing hole 243 of the gear fixing seat 24, the second shaft fixing hole 213 of the swing arm fixing seat 21, and the fourth shaft fixing hole 181 of the swing arm fixing cover plate 18, and can rotate freely within each shaft fixing hole. The swing arm fixing seat 21 and the gear fixing seat 24 are in plug-in fit, that is, the column 214 of the swing arm fixing seat 21 and the first groove 182 of the swing arm fixing cover plate 18 are inserted, ensuring no radial rotation between the two. The pinion shaft 20 is fixed on the third shaft fixing hole 191 of the swing arm 19, and there is no relative movement between the swing arm 19 and the pinion fixing shaft 30. The assembly is in the swing arm moving groove 215 of the swing arm fixing seat 21 for swing arm movement. The swing arm fixing seat 21 and the swing arm fixing cover plate 18 are in plug-in fit, that is, the column 214 of the swing arm fixing seat 21 is inserted into the second groove 182 of the swing arm fixing cover plate 18, and there is no radial rotation between the two. The large gear shaft 25 is fixed with a second limiting tube 17-2 and a first limiting tube 17-1, which are distributed at both ends of the gear fixing seat 24 and the swing arm fixing cover plate 18. Its function is to tightly fix the parts between the gear fixing seat 24 and the swing arm fixing cover plate 18 and there is no axial movement relative to the large gear shaft 25.

[0078] The needle bodies of the array needles 4 are respectively fixed in the needle body fixing holes 192 of the swing arm 19, and power lines 61 are welded to the tail ends. The power lines 61 pass through the third wire passing hole 212 of the swing arm fixing seat 21, the wire passing groove 244 of the gear fixing seat 24, the second wire passing hole 321 of the rotating base 32, and the first wire passing hole 381 of the support seat 38 and then enter the handle 1. The power lines 61 are connected to the steep pulse generator through the cable 6.

[0079] See Figure 15 , the working spacing adjustment and locking of the array needles:

[0080] As Figures 16-20 shown, the initial state of the array needles is that all the needle bodies are closely attached to the needle body placement groove 51 of the protective sleeve 5.

[0081] Rotate the spacing turntable 9 clockwise. The spacing turntable 9 drives the turntable shaft 30, drives the large gear shaft 25 to rotate through the universal joint 29. The first large gear 23 fixed to the large gear shaft 25 drives the first small gear 22 to rotate, so as to control the expansion of the swing arm 19 driven by the pinion shaft 20. The working spacing d of the array needles increases, and the corresponding ablation area increases at this time; conversely, rotate the spacing turntable 9 counterclockwise, the working spacing d of the array needles decreases, and the corresponding ablation area decreases at this time.

[0082] The working spacing d1 of the said array needles is steplessly adjustable, and the adjustable range is 6 - 12 mm, and the adjustable range of the corresponding diagonal working spacing d2 is 8.5 - 17 mm. Figure 10Indicates the minimum and maximum states with a working spacing d1 and a diagonal working spacing d2. The minimum working spacing d1 is denoted as d1min, and the maximum is denoted as d1max. Correspondingly, the minimum diagonal working spacing d2 is denoted as d2min, and the maximum is denoted as d2max.

[0083] Figures 1-18 As shown, sliding the push button assembly 10 to the right unlocks the spacing turntable 9. Rotating the spacing turntable 9 counterclockwise causes the first limiting plate 91 of the spacing turntable 9 to abut against the first limiting groove 136 of the right housing 13. At this time, the cylindrical boss 1021 of the slider 102 is aligned with the first positioning hole 93 of the spacing turntable 9. Sliding the push button assembly 10 to the left causes the cylindrical boss 1021 of the slider 102 to insert into the first positioning hole 93 of the spacing turntable 9, thereby locking the minimum working spacing d1min of the array needle and the corresponding minimum diagonal working spacing d2min. Sliding the push button assembly 10 to the right unlocks the spacing turntable 9. Rotating the spacing turntable 9 clockwise causes the second limiting plate 92 of the spacing turntable 9 to abut against the second limiting groove 121 of the left housing 12. At this time, the cylindrical boss 1021 of the slider 102 is aligned with the second positioning hole 94 of the spacing turntable 9. Sliding the push button assembly 10 to the left causes the cylindrical boss 1021 of the slider 102 to insert into the second positioning hole 94 of the spacing turntable 9, thereby locking the maximum working spacing d1max of the array needle and the corresponding maximum diagonal working spacing d2max. By adding new positioning holes between the first positioning hole 93 and the second positioning hole 94 of the spacing turntable 9, more adjustment gears can be obtained, with a smaller gear span and the gears can be locked, making it more flexible and convenient for doctors to operate the instrument.

[0084] See Figure 17 and Figure 20 As shown in FIGS. and, the needle rod 3 further includes a protection shaft 14, a protection shaft limiting block 15, and a sealing ring 16. Specifically, the cylindrical surface 152 of the protection shaft limiting block 15 is inserted and fixed in the third groove 183 of the swing arm fixed cover plate 18, and there is no relative movement between the two. The protection shaft 14 is a stainless steel hexagonal shaft and is centrally disposed in the through hole of the large gear rotating shaft 25. The left end of the protection shaft 14 passes through the limiting hole 151 of the protection shaft limiting block 15 and is fixed to the protection sleeve 5. The cross-sections of the protection shaft 14 and the limiting hole 151 of the protection shaft limiting block 15 are both hexagonal, which can effectively prevent the protection shaft 14 from rotating when the large gear rotating shaft 25 rotates. The right end of the protection shaft 14 is provided with an annular groove for fixing the sealing ring 16, and the outer wall of the sealing ring 16 is in close contact with the inner wall of the through hole of the large gear rotating shaft 25. The first through hole 251 of the large gear rotating shaft 25 is fixed with a water inlet pipeline 71, and the second through hole 252 is fixed with a water outlet pipeline 72. The water inlet pipeline 71 and the water outlet pipeline 72 pass through the second wire passing hole 321 of the rotating base 32 and the first wire passing hole 381 of the support base 38 and enter and pass through the handle 1, where the water inlet pipeline 71 is finally connected to the steep pulse generator.

[0085] Adjustment of the working length of the array needle:

[0086] Preparation stage: Close the Robert clamp of the water outlet pipeline 72, connect the water inlet pipeline 71 to the steep pulse generator, pump water from the water inlet pipeline 71, drive the protective sleeve 5 to move rightward to the right limit by the protective shaft 14, open the Robert clamp of the water outlet pipeline 72, and pump water into the water inlet pipeline until water flows out from the water outlet pipeline 72.

[0087] Protection state: Close the Robert clamp of the water outlet pipeline 72, pump water into the water inlet pipeline 71, drive the protective sleeve 5 to move leftward to the left limit by the protective shaft 14 and keep it. At this time, the tip of the array needle 4 is completely in the needle body moving slot 51 of the protective sleeve 5, effectively avoiding the tip of the needle from pricking the human organs and at the same time avoiding the needle from being contaminated.

[0088] Working state: Set the working length L on the steep pulse generator according to requirements. The steep pulse generator pumps water from the water inlet pipeline 71, drives the protective sleeve 5 to move rightward to the specified position by the protective shaft 14, so that the required working length L is preset. Then, under medical imaging, insert the needle body of the array needle into the lesion. This way of inserting the needle ensures the accuracy of the working length L of the array needle to a certain extent and avoids over-puncturing and pricking the human organs.

[0089] The adjustment of the working length of the array needle can be achieved by pumping water or pumping out water into the pipeline, or by pumping air or pumping out air into the pipeline. However, controlling water to adjust the working length is more accurate.

[0090] The working length L of the array needle is steplessly adjustable, and the adjustable range is 0 - 40 mm. Figure 17 It represents the state with the maximum working length L, and the maximum working length is represented as Lmax.

[0091] The handle 1 further includes a button 11 and a button board 43. A signal line 62 is connected to the button board 43, and the signal line 62 is connected to the steep pulse generator through a cable 6. The button 11 acts on the button board 43, gives a signal to the steep pulse generator through the signal line 62 via the cable 6, and the steep pulse generator outputs power to the array needle through the cable 6 via a power line 61 to ablate the lesion.

[0092] The clinical value of the endoscopic steep pulse lies in that: the steep pulse requires parallel needle placement, and more than 2 electrodes need to be parallelly placed and there are basic requirements for the distance between the electrodes, generally between 1 cm and 2 cm. If it is too short, it is easy to cause a short circuit, and if it is too long, the effect is not good. The best ablation effect can be achieved according to the recommended value. The commonly used clinical specifications of the trocar of the endoscope are 10 mm and 12 mm, and the pulsed electrodes with a distance exceeding 12 mm cannot pass through the trocar. Therefore, currently, the steep pulse cannot be used for surgery under the endoscope. Designing this electrode with adjustable needle spacing can achieve the purpose of performing steep pulse treatment under the endoscope, which should be an innovation in surgical methods.

[0093] The specific operation steps are as follows:

[0094] Step 1: Control the steep pulse generator to move the protective sleeve 5 to the leftmost end, move the push button assembly 10 to the right to unlock the pitch turntable 9, rotate the pitch turntable 9 of the handle 1 counterclockwise to retract the needle bodies of the array needle 4 into the needle body placement groove of the protective sleeve 5, and move the push button to the left to lock the pitch turntable 9;

[0095] Step 2: Under medical imaging, deliver the handle 1 forward so that the extension rod 2 passes through the trocar;

[0096] Step 3: According to the location of the lesion, pre-adjust the angle turntable 8 of the handle 1 so that the array needle 4 is initially facing the lesion;

[0097] Step 4: Move the push button assembly 10 to the right to unlock the pitch turntable 9, rotate the pitch turntable 9 of the handle 1, and adjust the working pitch d1 of the array needle 4 to a suitable value according to the specific situation of the lesion, and move the push button to the left to lock the pitch turntable 9;

[0098] Step 5: Preset the working length L of the array needle through the steep pulse generator according to the specific situation of the lesion;

[0099] Step 6: Insert the array needle 4 into the lesion under medical imaging. During the insertion process, the insertion angle of the array can be appropriately adjusted through the angle turntable 8 until the protective sleeve 5 is in close contact with the lesion, and then press the button 11 to ablate the lesion area;

[0100] Step 7: After ablation, under medical imaging, retract the handle 1 backward so that the array needle 4 completely exits the lesion area, control the steep pulse generator to move the protective sleeve 5 to the left limit, move the push button assembly 10 to the right to unlock the pitch turntable 9, rotate the pitch turntable 9 of the handle 1 to retract the needle bodies of the array needle 4 into the needle body placement groove of the protective sleeve 5, move the push button to the left to lock the pitch turntable 9, adjust the angle turntable 8 so that the extension rod 2 and the needle rod 3 are basically coaxial, and then continue to retract the handle 1 backward to completely withdraw the instrument from the trocar.

[0101] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and for the combination embodiments of one or more of the above embodiments, those skilled in the art can make various changes, modifications or combinations within the scope of the claims, which does not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A steep pulse array needle, characterized in that Including a handle, one end of the handle is cooperatively connected with the tail of the needle rod through an extension rod, the head of the needle rod is provided with a plurality of array needles, and the heads of the array needles are placed in a protective sleeve; a pitch adjustment component, the pitch adjustment component is used to adjust the pitch between the plurality of array needles, so as to adjust the ablation area corresponding to the array needles; the pitch adjustment component includes an operation part, a transmission part and an execution part which are connected in sequence: the operation part includes a pitch turntable, the pitch turntable is fixed in the handle through a turntable groove, and the pitch turntable is limited to rotate in the turntable groove; the transmission part includes a turntable rotating shaft, the turntable rotating shaft is coaxially arranged in the extension rod, one end of the turntable rotating shaft is fixed to the pitch turntable, and the other end is fixed to a universal joint, the universal joint is arranged at the connection of the extension rod and the needle rod, the universal joint is cooperatively connected with one end of a large gear rotating shaft through an adapter, the large gear rotating shaft is coaxially arranged inside the needle rod, and the other end of the large gear rotating shaft is cooperatively connected with the execution part; the execution part includes a large gear and a plurality of small gears, the number of the small gears corresponds to the number of the array needles, the large gear is fixed on a gear fixing seat sleeved on the large gear rotating shaft, the plurality of small gears are fixed on the gear fixing seat through small gear rotating shafts, and the large gear meshes with the plurality of small gears at the same time; the execution part further includes a plurality of swing arms, the swing arms are cooperatively connected with one end of the small gear rotating shafts, and the array needles are sleeved inside the swing arms, the swing arms are arranged inside a swing arm fixing seat, the swing arm fixing seat is provided with a plurality of swing arm activity grooves, the swing arm activity grooves are used for the swing arms to expand, when the small gears rotate, the small gear rotating shafts are driven to rotate, so as to drive the swing arms to expand in the swing arm activity grooves, and the array needles expand along with the swing arms; a length adjustment component, the length adjustment component is used to adjust the working length of the array needles.

2. The steep pulse array needle according to claim 1, characterized in that, The operation part is arranged inside the handle, the execution part is arranged at the tail of the array needles, by manually controlling the operation part, the transmission part drives the execution part to expand the array needles from the initial position to a preset threshold position, and reversely operating the operation part, the array needles are retracted from the expanded position to the initial position; the length adjustment component is used to control the protective sleeve to perform limited movement along the axial direction of the array needles, and by controlling the length adjustment component to move the protective sleeve, the working length of the array needles is adjusted.

3. The steep pulse array needle according to claim 2, wherein It further includes an angle adjustment component, the angle adjustment component is used to control the included angle between the needle rod and the extension rod, so that the needle rod and the array needles face the target area.

4. The steep pulse array needle according to claim 3, characterized in that, When the pitch turntable rotates, it can drive the turntable rotating shaft to rotate, so as to drive the large gear rotating shaft to rotate, and the universal joint is used for the rotation of the pitch turntable to still be synchronously transmitted to the large gear rotating shaft when the extension rod and the needle rod have an included angle.

5. A steep pulse array needle according to claim 4, characterized in that, One end of the swing arm fixing seat is plugged into and matched with the gear fixing seat, and the other end of the swing arm fixing seat is plugged into and matched with the swing arm fixing cover plate. The large gear rotating shaft is also provided with a first limiting tube and a second limiting tube. The first limiting tube is arranged on one side of the swing arm fixing cover, and the second limiting tube is arranged on one side of the gear fixing seat. The first limiting tube and the second limiting tube are used to tighten the gear fixing seat and the swing arm fixing cover plate, and there is no axial movement relative to the large gear rotating shaft.

6. The steep pulse array needle according to claim 5, wherein, The operating part also includes a push button assembly, which includes a push button and a slider, the push button and the slider are cooperatively connected, the handle includes a left shell and a right shell, the handle is provided with a slide groove, and the push button assembly slides in the slide groove.

7. A steep pulse array needle according to claim 6, characterized in that, A first limit plate and a second limit plate are provided on one side of the spacing rotating disk, and the first limit plate and the second limit plate are hinged at a certain angle. When the spacing rotating disk rotates, the first limit plate abuts against the first limit groove on the right shell to trigger the limit, and the second limit plate abuts against the second limit groove on the left shell to trigger the limit; When the limit is triggered, the cylindrical boss on the slider is aligned with the positioning hole on the spacing dial, and the push button is pushed to fix the spacing dial and lock the position of the array needles at the same time.

8. A steep pulse array needle according to claim 7, characterized in that, The length adjustment assembly includes a protective shaft, a protective shaft limit block and a sealing ring. The protective shaft is arranged at one end of the needle rod, and the protective shaft is coaxially arranged with the large gear shaft. The protective shaft limit block is arranged at the tail of the protective shaft. The protective shaft limit block is inserted and fixed to the front section of the swing arm fixing cover plate. An annular groove is provided at the tail of the protective shaft, and the annular groove is used to fix the sealing ring. The outer wall of the sealing ring is tightly fitted with the inner wall of the large gear shaft to form a closed cavity. A through hole is provided on one side of the large gear shaft, and the through hole is used to connect a pipeline. The tail of the pipeline is connected to a steep pulse generator.

9. The steep pulse array needle according to claim 8, wherein The pipeline includes a water inlet pipeline and a water outlet pipeline. When the array needle is in the protection state, the water outlet pipeline is closed, the water inlet pipeline is connected to the steep pulse generator, and water is pumped into the closed cavity through the water inlet pipeline, so that the protection shaft drives the protection sleeve to move away from the needle rod end to the left limit position and maintain it, at which time the head of the array needle is completely in the needle body movable groove of the protection sleeve; When the array needle is in working state, the steep pulse generator draws water from the water inlet pipeline, so that the protection shaft drives the protection sleeve to move rightward to a specified position, the specified position is determined according to actual needs, and the stroke of the protection sleeve is the actual working length of the array needle; When the array needle ends its working state, the steep pulse generator pumps water from the water inlet pipe, so that the protection shaft drives the protection sleeve to move to the right limit position toward the end close to the needle rod, opens the water outlet pipe, and pumps water into the water inlet pipe until water flows out of the water outlet pipe, thereby restoring the initial state.

10. A steep pulse array needle according to claim 9, characterized in that, The angle adjustment assembly includes an angle turntable, an angle adjustment large gear, an angle adjustment small gear and a double gear. The angle turntable is arranged in the fixed groove of the right shell of the handle, and the angle turntable is fixedly connected with the large angle adjustment gear through a rotating shaft. The large angle adjustment gear meshes with the double gear, and the double gear simultaneously meshes with the small angle adjustment gear; It further includes a support base and a worm rotating shaft. One end of the worm rotating shaft is fixedly connected with the small angle adjustment gear. The other end of the worm rotating shaft passes through the support base and cooperates with a worm. A rotating base is arranged between the worm and the support base. The worm meshes with a worm gear. A worm gear rotating shaft is sleeved in the middle of the worm gear. The worm gear rotating shaft passes through the rotating base and the rotating bracket and is press-fitted and fixed. The front section of the rotating bracket is fixedly connected with the needle bar; The rotating base and the support base are arranged inside the extension tube, and the extension rod is coaxially sleeved outside the extension tube.

11. A steep pulse array needle according to claim 10, characterized in that, When the angle turntable rotates, it drives the large angle adjustment gear, the double gear and the small angle adjustment gear to rotate. The small angle adjustment gear drives the worm rotating shaft to rotate and transmits the motion to the worm. The worm drives the worm gear to rotate, thereby driving the rotating bracket to rotate, so that an included angle is formed between the extension rod and the needle bar, and the angle of the array needle is adjusted.

12. A steep pulse array needle according to claim 11, wherein, The small gear rotating shaft passes through the first rotating shaft fixing hole of the gear fixing seat, the second rotating shaft fixing hole of the swing arm fixing seat and the fourth rotating shaft fixing hole of the swing arm fixing cover plate, and rotates freely in the holes. The small gear rotating shaft is fixedly connected with the third rotating shaft fixing hole of the swing arm.

13. A steep pulse array needle according to claim 12, wherein A power line is welded to the tail of the array needle. The power line passes through the third wire passing hole of the swing arm fixing seat, the wire groove of the gear fixing seat, the second wire passing hole of the rotating base and the first wire passing hole of the support base and then enters the handle. The power line is connected to the steep pulse generator through a cable.

14. A steep pulse array needle according to claim 13, characterized in that, The water inlet pipeline and the water outlet pipeline pass through the second wire passing hole of the rotating base and the first wire passing hole of the support base, enter and pass through the handle, and the water inlet pipeline is connected to the steep pulse generator.

15. A steep pulse array needle according to claim 1, characterized in that, The handle further includes a button and a button board. A signal line is connected to the button board. The signal line is connected to the steep pulse generator through a cable. The button acts on the button board to send a signal to the steep pulse generator through the signal line and the cable. The steep pulse generator outputs power to the array needle through the cable and the power line to ablate the lesion.

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