Bending-adjustable conformal ablation needle device under laparoscope and operation method thereof

Abstract

The invention discloses a bending-adjustable conformal ablation needle device under a laparoscope and an operation method thereof.The bending-adjustable conformal ablation needle device comprises a conformal needle combination, a bending control pipe assembly is fixed to the rear end of the conformal needle combination, an extension rod is fixed to the rear end of the bending control pipe assembly, and a handle device is fixed to the rear end of the extension rod; the conformal needle assembly, the bending control pipe assembly, the extension rod and the handle device are sleeved with a protection assembly, the protection assembly moves front and back to hide an ablation needle assembly at the front end of the conformal needle assembly, and the handle device comprises a bending control adjusting part and a conformal needle adjusting part. The bending control adjusting part is connected with the bending control pipe assembly so that the bending control pipe assembly and the protection assembly can be kept bent towards the two sides, and the conformal needle adjusting part is connected with the conformal needle in a combined mode so that the ablation needle assembly can penetrate through the front end of the protection assembly and move in the radial direction.

Description

Technical Field

[0001] This invention relates to the field of pulse ablation needle technology, specifically to an adjustable bendable conformal ablation needle device for laparoscopy and its operation method. Background Technology

[0002] Laparoscopic surgery, hailed as "minimally invasive surgery" or "keyhole surgery," boasts the core advantages of minimal trauma and rapid recovery. Because instruments enter through small incisions in the abdominal wall, it is often difficult to establish a perpendicular operating path to deep tissues such as the liver. Therefore, surgical instruments must possess excellent controllable bending capabilities to ensure the ablation needle can flexibly adjust its angle for precise ablation of the tumor. Traditional instruments lack the ability to adjust the tip's conformal adjustment, failing to flexibly adjust the spacing between multiple needles according to the irregular shape of the tumor to achieve conformal coverage. Existing technologies either only achieve single bending adjustment or only have a fixed needle array, unable to integrate the complex motion function of "first adjusting the path for alignment, then conformally deploying the ablation needle" on a single instrument. Furthermore, they lack intraoperative biopsy channels, modular rapid ablation needle replacement, and safety locking mechanisms for adjustable structures. Extensive research has been conducted on these issues. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an adjustable bendable conformal ablation needle device for laparoscopy and its operation method, which can solve the problems in the prior art.

[0004] This invention is achieved through the following technical solution: A laparoscopic adjustable bendable conformal ablation needle device includes a conformal needle assembly. A bend control tube assembly is fixed to the rear end of the conformal needle assembly. An extension rod is fixed to the rear end of the bend control tube assembly. A handle device is fixed to the rear end of the extension rod. A protective assembly is sleeved on the outside of the conformal needle assembly, the bend control tube assembly, the extension rod, and the handle device. The protective assembly, when moved back and forth, conceals the ablation needle assembly at the front end of the conformal needle assembly. The handle device includes a bend control adjustment part and a conformal needle adjustment part. The bend control adjustment part is connected to the bend control tube assembly, causing the bend control tube assembly and the protective assembly to remain bent to both sides. The conformal needle adjustment part is connected to the conformal needle assembly, allowing the ablation needle assembly to pass through the front end of the protective assembly and move radially.

[0005] In a further technical solution, the protective component includes a protective tube, the front end of which is fixed with a protective sleeve, and a perforation is provided inside the protective sleeve. The fitting assembly includes a five-lumen tube and a channel inner tube, with a central hole provided inside the five-lumen tube. The fitting adjustment part includes a channel guide tube, and the perforation, central hole, channel inner tube, and channel guide tube inside the protective sleeve form a central channel.

[0006] A further technical solution includes a five-lumen tube disposed within the extension rod. A lower fitting seat is inserted and fixed to the front end of the five-lumen tube. Multiple ablation needle assemblies are elastically slidably disposed within the lower fitting needle seat. An insulating wire is electrically connected to one side of each ablation needle assembly, and a fitting needle pull rope is also connected and fixed to one side of each ablation needle assembly. The fitting needle pull rope and the insulating wire pass through the five-lumen tube, and the fitting needle pull rope is connected and fixed to the fitting needle adjustment part.

[0007] A further technical solution includes an ablation needle assembly comprising an ablation needle with a threaded tail and a needle seat. A connector is inserted into the needle seat. The tail of the ablation needle passes through the needle seat and is threadedly connected and fixed to the internal threaded hole in the connector. One end of the connector is electrically connected and fixed to the insulated wire. The tail of the needle seat is connected and fixed to the conformal needle pull cord. A compression spring is provided inside the needle seat, and the compression spring is elastically disposed between the inside of the needle seat and the inner tube of the channel.

[0008] In a further technical solution, a tail wire is also fixed inside the handle device, and the tail wire is electrically connected to the insulated wire.

[0009] In a further technical solution, the fitting needle adjustment part includes a rear sleeve, a pull cord guide block is fixed inside the rear sleeve, a plurality of sliding grooves are fixed inside the rear sleeve, a fitting push button is slidably disposed in the sliding groove, the fitting push button is fixedly connected to the fitting needle pull cord, a plurality of damping rings are fixed on the fitting push button, and the damping rings are disposed on the inner wall of the rear sleeve and the outer surface of the pull cord guide block.

[0010] A further technical solution is that the bending control tube assembly includes a bending control tube disposed inside the protective tube. The upper and lower ends of the inner side of the bending control tube are fixed with bending control tube ropes. The bending control tube ropes pass through the extension rod and are connected to the bending control adjustment part. The bending control adjustment part adjusts the upper and lower ends of the bending control tube ropes, so that one of the bending control tube ropes is stretched and the other bending control tube rope is released, thereby causing the bending control tube to bend.

[0011] In a further technical solution, the bending control adjustment unit includes a winding wheel rotatably disposed within the handle device. The upper and lower winding wheels are driven by a gear combination so that the upper and lower winding wheels rotate in opposite directions. The bending control tube pull rope is fixed to the outer surface of the winding wheel.

[0012] A further technical solution includes a gear assembly comprising a bending control gear that is poweredly connected to the winding wheel, an adjusting gear meshing between the bending control gears, and a handle assembly that can be locked after rotation on one side of the adjusting gear.

[0013] A further technical solution includes a bending control shaft fixed inside the adjusting gear. The bending control shaft is rotatably connected to the inside of the handle device. The adjusting gear and the bending control shaft are connected by a keyway and a key. A bending control knob is fixed on one side of the bending control shaft. An elastic block slot structure is provided between the bending control knob and the outer shell of the handle device to keep the bending control knob fixed to the outer shell of the handle device.

[0014] A further technical solution includes an elastic block slot structure comprising multiple connecting seats fixed to one side of the bending control knob, wherein a telescopic locking pin is elastically provided in the connecting seat, and the outer shell of the handle device is provided with multiple insertion holes arranged in a circular array, wherein the locking pin extends out of the locking pin baffle and engages with the insertion hole for fixation.

[0015] The beneficial effects of this invention are as follows: 1. Composite motion mechanism: It integrates dual, independently controllable motion of distal bending and distal conformal adjustment. Through the bending control tube and bending adjustment section, the distal end of the instrument, i.e., the part before the conformal needle assembly, achieves overall directional bending within the abdominal cavity, solving the path alignment problem from the trocar to the tumor surface. Through multiple independently controllable ablation needles, it achieves radial expansion and spacing adjustment of the ablation needles after they reach the target at the working end, solving the conformal coverage problem for irregularly shaped tumors. These two mechanisms are spatially connected but independently controlled, together forming a precise and efficient operating paradigm of "path bending alignment first, then distal conformal expansion."

[0016] II. Multifunctional Integrated Tube Structure: The "five-lumen tube" achieves compact spatial reuse and physical isolation of functional channels. Central Channel Function: The central lumen of the five-lumen tube is precisely aligned with the inner channel tube and the central channel guide tube of the handle, forming a central working channel that runs through the entire instrument. This can be used to introduce sensors for real-time monitoring during surgery or to insert biopsy needles for tissue sampling, achieving integrated diagnostic and therapeutic functions. Peripheral Channel Isolation: Four independent lumens around the five-lumen tube are used to lay the insulating wire and conformal needle pull cord corresponding to each ablation needle. This structure achieves physical isolation between the high-voltage power supply line and the mechanical transmission components, fundamentally avoiding motion interference and potential electrical safety risks, and ensuring the reliability of independent control of each ablation needle.

[0017] III. Modular Ablation Needle Unit: Employing an independent, replaceable module integrating electrical connections and mechanical transmission. Each ablation needle assembly functions as an independent functional unit. This design achieves decoupling and robust integration of high-voltage electrical connections and mechanical transmission within the module. As a sterile consumable, the ablation needle can be replaced independently and quickly, eliminating the need to discard the entire expensive instrument, significantly reducing surgical consumable costs and improving the convenience and economy of instrument use.

[0018] Fourth, for the conformal needle adjustment part, a damping ring is set between the pull rope guide block and the rear sleeve, so that the conformal push button remains in a fixed position through the damping effect after the movement and adjustment, so as to keep the position of the ablation needle assembly unchanged.

[0019] Fifth, by setting up an upper conformal needle seat, an inner channel tube, a middle hole, and a channel guide tube, a central channel is formed, which facilitates biopsy sampling or the insertion of other instruments, and at the same time connects the internal and external areas.

[0020] VI. The protective component is designed to slide and lock. In the initial stage of the instrument, it shields and protects the prosthetic needle assembly, improving the safety of its insertion into the body. The protective component can also slide backward to allow the prosthetic needle assembly to extend out of the insertion slot and move normally. Attached Figure Description

[0021] For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure of the adjustable bendable conformal ablation needle device for laparoscopy according to the present invention. Figure 2 for Figure 1 A schematic diagram of the structure after the ablation needle extends out of the protective tube and after the spacing is adjusted; Figure 3 for Figure 1 A cross-sectional view of the device in the middle; Figure 4 for Figure 2 A schematic diagram of the structure of the protective components and devices after disassembly; Figure 5 for Figure 4 Schematic diagram of the structure of the central protective component; Figure 6 for Figure 4 A schematic diagram of the structure of the conformal needle assembly; Figure 7 for Figure 6 Schematic diagram of the structure of the ablation needle assembly; Figure 8 for Figure 4 Schematic diagram of the central control bend assembly; Figure 9 for Figure 4 A schematic diagram of the middle handle device; Figure 10 for Figure 9 The composition of the central control curve adjustment unit and its disassembled structural diagram; Figure 11 for Figure 10 Schematic diagram of the front structure of the central control curve adjustment unit; Figure 12 for Figure 11 A schematic diagram showing the fit between the center pin and the bending control knob in the AA direction; Figure 13 for Figure 4 Schematic diagram of the structure of the fitting adjustment part; Figure 14 This is a schematic diagram of the bent structure of the device of the present invention; In the diagram, the components are: 1. Protective component; 2. Fitting needle assembly; 3. Bending control tube assembly; 4. Extension rod; 5. Handle device; 6. Tail wire; 11. Protective sleeve; 12. Protective tube; 21. Upper fitting needle seat; 22. Channel inner tube; 23. Ablation needle assembly; 231. Ablation needle; 232. Needle seat; 233. Terminal block; 234. Compression spring; 24. Lower fitting needle seat; 241. Inner cavity; 242. Guide groove; 243. Through hole; 25. Five-cavity tube; 251. Five-cavity tube through hole; 252. Middle hole; 26. Insulating wire; 27. Fitting needle pull rope; 31. Bending control tube; 32. Bending control tube pull rope; 52. Cap; 53. Front sleeve; 54. Locking screw; 55. Guide sleeve. 56. Left handle seat, 57. Bending control adjustment part, 571. Winding wheel, 572. Bending control gear, 573. Adjustment gear, 574. Locking nut, 575. Bending control knob, 576. Compression spring, 577. Locking pin, 578. Locking pin baffle, 579. Connecting seat, 590. Insertion hole, 591. Bending control shaft, 592. Fitting pin adjustment part, 58. Decorative sleeve, 581. Pull rope guide sleeve, 582. Pull rope guide block, 583. Fitting push button, 584. Rear end sleeve, 585. Channel guide tube, 586. Pull rope guide tube, 588. Damping ring, 587. Right handle seat, 59. Protrusion, 61. Groove, 62. Through slot, 63. Detailed Implementation

[0023] like Figures 1-14 As shown, the present invention will be described in detail. For ease of description, the directions mentioned below are defined as follows: the directions of up, down, left, right, front, and back mentioned below are the same as... Figure 1 The directions of the projection relationship are consistent in all directions: up, down, left, right, front, and back.

[0024] In Embodiment 1, a laparoscopic adjustable conformal ablation needle device of the present invention includes a conformal needle assembly 2, a bending control tube assembly 3 fixed to the rear end of the conformal needle assembly 2, an extension rod 4 fixed to the rear end of the bending control tube assembly 3, and a handle device 5 fixed to the rear end of the extension rod 4. A protective component 1 is sleeved on the outside of the conformal needle assembly 2, the bending control tube assembly 3, the extension rod 4, and the handle device 5. The protective component 1 can move back and forth to hide the ablation needle assembly 23 at the front end of the conformal needle assembly 2 so as to facilitate the passage of the trocar in the abdominal wall. The handle device 5 includes a bending adjustment part 57 and a conformal needle adjustment part 58. The bending adjustment part 57 is connected to the bending control tube assembly 3 so that the bending control tube assembly 3 and the protective component 1 are kept bent to both sides. The conformal needle adjustment part 58 is connected to the conformal needle assembly 2 so that the ablation needle assembly 23 passes through the front end of the protective component 1 alone or entirely and moves radially.

[0025] The overall structure of the device is constituted through Embodiment 1.

[0026] Example 2, based on Example 1, further defines the following: Advantageously, the protective component 1 includes a protective tube 12, a front sleeve 53 is fixedly provided on the rear side of the protective tube 12, a locking structure is provided on the front sleeve 53 and it is connected and fixed to the front end of the handle device 5, and a through groove 63 is provided on the protective tube 12, through which the ablation needle component 23 of the conformal needle assembly 2 extends out.

[0027] Advantageously, a protective sleeve 11 is fixed to the front end of the protective tube 12, which fixes the front end of the protective tube 12. A perforation is provided inside the protective sleeve 11, which serves as a limiting device. The first perforation facilitates the passage of the biopsy needle for biopsy sampling. The protective tube 12 is hollow. Beneficially, the protective pipe 12 is made of multiple sections of different flexible composite pipes, the middle section of which can bend and deform with the controlled bend pipe 31.

[0028] Advantageously, the handle device 5 has grooves 62 on both sides of the front end, and a guide sleeve 55 is fixed at the rear end of the front sleeve 53. A protrusion 61 is fixed inside the guide sleeve 55, and the protrusion 61 is slidably guided to the groove 62.

[0029] The outer protective tube structure is formed by the protective tube 12, the front sleeve 53, the locking screw 54, the guide sleeve 55, the protrusion 61 and the groove 62. It can extend and move to shield and protect the conformal needle assembly 2, so as to prevent the conformal needle assembly 2 from being damaged when it is placed in the equipment.

[0030] Example 3, based on Example 2, further defines the following: Advantageously, the locking structure includes a threaded hole provided in the front sleeve 53, and a locking screw 54 is threadedly connected in the threaded hole. By rotating the locking screw 54 and passing it through the front sleeve 53, it is pressed and fixed to the front end of the handle device 5.

[0031] The design of the locking screw 54 and the threaded hole in the front sleeve 53 allows the protective tube 12 to be locked and fixed after movement.

[0032] Example 4, based on Example 1, 2, or 3, further defines the following: Advantageously, the bending control tube assembly 3 includes a bending control tube 31, which is located in the middle section of the protective tube 12. The upper and lower ends of the inner side of the bending control tube 31 are fixed with bending control tube ropes 32. The bending control tube ropes 32 pass through the internal space of the extension rod 4 and are connected to the bending control adjustment part 57. The bending control adjustment part 57 adjusts the upper and lower ends of the bending control tube ropes 32, so that one bending control tube rope 32 is stretched and the other bending control tube rope 32 is released, thereby realizing the function of bending the bending control tube 31.

[0033] Through the specific structural design of 3, the bending control tube assembly 3 is fixed to the front side of the extension rod 4, and the extension rod 4 is fixed inside the handle device 5. However, the bending control tube 31 can be bent synchronously with the bending part of the protective tube 12, thereby changing the angle of the conformal needle assembly 2.

[0034] Example 5, based on Example 1, 2, 3, or 4, further defines the following: Advantageously, the bending control adjustment unit 57 includes a rotatable winding wheel 571 disposed in the handle device 5. The upper and lower winding wheels 571 are driven by a combination of three meshing gears, so that the upper and lower winding wheels 571 rotate in opposite directions. The bending control tube pull rope 32 is fixed to the outer surface of the winding wheel 571.

[0035] Advantageously, the gear assembly includes a bending control gear 573 that is poweredly connected to the winding wheel 571, an adjusting gear 574 that meshes between the bending control gears 573, and a handle assembly that can be locked after rotation is provided on one side of the adjusting gear 574.

[0036] Advantageously, a winding shaft 572 is fixed inside the winding wheel 571 and the bending control gear 573. The winding shaft 572 is rotatably connected to the handle device 5. The winding shaft 572 is connected to the winding wheel 571 and the bending control gear 573 through a keyway and a key. The winding shaft 572 is also provided with a step and a boss for engaging the winding wheel 571 and the bending control gear 573.

[0037] Advantageously, the handle assembly includes a bending control shaft 592 fixed within the adjusting gear 574. The bending control shaft 592 is rotatably connected to the handle device 5. The adjusting gear 574 and the bending control shaft 592 are connected via a keyway and a key. A bending control knob 576 is fixed on one side of the bending control shaft 592. An elastic block slot structure is provided between the bending control knob 576 and the outer shell of the handle device 5 to keep the bending control knob 576 fixed to the outer shell of the handle device 5.

[0038] Advantageously, the elastic block slot structure includes multiple connecting seats 590 fixed to one side of the bending control knob 576. The connecting seats 590 are elastically provided with telescopic locking pins 578. The outer shell of the handle device 5 is provided with multiple insertion holes 591 arranged in a circular array. After the locking pins 578 extend out of the locking pin baffle 579, they are engaged and fixed with the insertion holes 591.

[0039] Advantageously, a compression spring 577 is elastically provided between the locking pin 578 and the inside of the connecting seat 590. The locking pin 578 is elastically connected to the compression spring 577. A locking pin baffle 579 is fixed at the end of the connecting seat 590. The locking pin 578 extends out of the locking pin baffle 579. After the locking pin baffle 579 is removed, the locking pin 578 and the compression spring 577 can be removed.

[0040] Advantageously, the outer surface of the bending control shaft 592 is threadedly connected to a locking nut 575, which is located inside the handle device 5. The locking nut 575 is used to axially limit the bending control shaft 592 to prevent it from moving. A gap is provided between the adjusting gear 574 and the inside of the handle device 5 so that the bending control shaft 592 can rotate normally.

[0041] By setting up a gear assembly and a handle assembly, it is easy for personnel to operate the gear meshing structure, thereby driving the bending control tube pull rope 32 to stretch or release, so as to bend the bending control tube 31. The handle assembly is also equipped with a locking structure to make it easy to fix the gear assembly to maintain the bending angle of the bending control tube 31.

[0042] Example 6, based on Example 1, 2, 3, 4, or 5, further defines the following: Advantageously, the conformal needle assembly 2 includes a five-lumen tube 25, which is disposed within the extension rod 4. A lower conformal needle seat 24 is inserted and fixed to the front end of the five-lumen tube 25. Multiple ablation needle assemblies 23 are elastically slidably disposed within the lower conformal needle seat 24. An insulating wire 26 is electrically connected to one side of each ablation needle assembly 23, and a conformal needle pull rope 27 is also connected and fixed to one side of each ablation needle assembly 23. The conformal needle pull rope 27 and the insulating wire 26 pass through the five-lumen tube 25. The conformal needle pull rope 27 is connected and fixed to the conformal needle adjustment part 58. By adjusting the conformal needle adjustment part 58, the conformal needle pull rope 27 is pulled, causing the conformal needle pull rope 27 to move in a circular motion relative to the lower conformal needle seat 24, moving closer to or further away from it. A channel inner tube 22 is fixed within the lower conformal needle seat 24. The channel inner tube 22 is used to pass through a biopsy puncture needle or other instruments.

[0043] Advantageously, the five-lumen tube 25 is provided with a central hole 252 and multiple five-lumen tube penetration holes 251. The central hole 252 is used to pass through a biopsy puncture needle or other instruments, and the conformal needle pull cord 27 and the insulating wire 26 pass through the five-lumen tube penetration holes 251.

[0044] Advantageously, the handle device 5 also includes a tail wire 6, which is electrically connected to the insulating wire 26. The tail wire 6 connects the device to an external high-voltage pulse generator. Preset electrical pulse parameters, such as field strength, pulse width, and frequency, are applied to perform irreversible electroporation ablation on the tissue.

[0045] Advantageously, the ablation needle assembly 23 includes an ablation needle 231 with a threaded tail, and a needle seat 232. A connector 233 is inserted into the needle seat 232. The tail of the ablation needle 231 passes through the needle seat 232 and is threadedly connected and fixed to the internal threaded hole in the connector 233. One end of the connector 233 is electrically connected and fixed to the insulating wire 26. The tail of the needle seat 232 is connected and fixed to the conformal needle pull cord 27. A compression spring 234 is provided inside the needle seat 232. The compression spring 234 is elastically disposed inside the needle seat 232 and between the inner tube 22 of the channel.

[0046] Advantageously, the upper conformal needle seat 21 is fixedly connected to the front side of the lower conformal needle seat 24. The upper conformal needle seat 21 and the lower conformal needle seat 24 can be connected and fixed by fasteners such as set screws. The upper conformal needle seat 21 is provided with a through hole, which is also used to pass through a biopsy puncture needle or other instruments. The upper conformal needle seat 21 and the lower conformal needle seat 24 together form a sliding groove structure for the ablation needle assembly 23 to slide.

[0047] Advantageously, the groove structure includes a through hole 243 disposed in the lower conformal needle seat 24, an inner cavity 241 connected to one side of the through hole 243, guide grooves 242 connected to both sides of the inner cavity 241, the side of the needle seat 232 is slidably connected to the through hole 243, the terminal block 233 is located in the inner cavity 241, and the protrusions at both ends of the side of the needle seat 232 are slidably connected to the guide grooves 242.

[0048] The specific structure of the conformal needle assembly 2 includes a five-lumen tube penetration hole 251 for the insulation wire 26 and the conformal needle pull cord 27 to pass through, and a middle hole 252 for the biopsy puncture needle or other instruments to pass through. The lower conformal needle seat 24, the upper conformal needle seat 21 and the ablation needle assembly 23 form an elastic moving structure, allowing personnel to adjust the extension and retraction of individual or all of the ablation needle assemblies 23 by operating the conformal needle adjustment part 58, so that the ablation needle assembly 23 can adapt to the size of tumor tissues of different shapes.

[0049] Example 7, based on Example 1, 2, 3, 4, 5, or 6, further defines the following: Advantageously, the fitting adjustment part 58 includes a rear sleeve 585, a pull rope guide block 583 fixed inside the rear sleeve 585, and multiple sliding grooves fixed inside the rear sleeve 585. A fitting push button 584 is slidably disposed in the sliding grooves. The fitting push button 584 is fixedly connected to the fitting needle pull rope 27. Multiple damping rings 587 are fixed on the fitting push button 584. The damping rings 587 are disposed on the inner wall of the rear sleeve 585 and the outer surface of the pull rope guide block 583, so that the fitting push button 584 moves synchronously after the user's finger moves and remains stationary after the movement stops.

[0050] Advantageously, the front end of the conformal push button 584 is fixed with a pull rope guide tube 588, and the conformal needle pull rope 27 passes through the pull rope guide tube 588 and is connected and fixed to the conformal push button 584.

[0051] Advantageously, a pull rope guide sleeve 582 is fixed inside the pull rope guide block 583, and a channel guide tube 586 is fixed inside the pull rope guide sleeve 582. The channel guide tube 586 is used to pass through a biopsy puncture needle or other instruments. A decorative sleeve 581 is fixed to the front side of the pull rope guide block 583, and the decorative sleeve 581 is connected and fixed to the rear end of the handle device 5.

[0052] By disclosing the specific structural design of the conformal needle adjustment part 58, a damping ring 587 is set between the pull rope guide block 583 and the rear sleeve 585, so that the conformal push button 584 can remain in a fixed position through the damping effect after the movement and adjustment, so as to keep the position of the ablation needle assembly 23 unchanged.

[0053] Example 8, based on Example 1, 2, 3, 4, 5, 6, or 7, further defines the following: Advantageously, the handle device 5 includes a left handle seat 56 and a right handle seat 59, which are fastened together to form a handle structure. A bending adjustment part 57 is disposed between the left handle seat 56 and the right handle seat 59. A front sleeve 53 is slidably disposed at the front end of the left handle seat 56 and the right handle seat 59. A fitting adjustment part 58 is snapped and fixed at the rear end of the left handle seat 56 and the right handle seat 59.

[0054] Advantageously, a cap 52 is fixed to the front end of the left handle seat 56 and the right handle seat 59, and an extension rod 4 is inserted into the cap 52. The extension rod 4 is fixed in the handle seat slot in the left handle seat 56 and the right handle seat 59. The cap 52 is used to limit the movement of the front sleeve 53 and prevent the front sleeve 53 from slipping off the front end of the left handle seat 56 and the right handle seat 59.

[0055] Advantageously, hollow channels are provided in the left handle seat 56 and the right handle seat 59, and the channel guide tube 586 extends into the left handle seat 56 and the right handle seat 59, and the channel guide tube 586 is connected to the five-chamber tube 25.

[0056] Advantageously, the winding shaft 572 and the bending control shaft 592 are rotatably connected to the left handle seat 56 and the right handle seat 59, the bending control shaft 592 extends out of the right handle seat 59, and the insertion hole 591 is provided on the outer surface of the right handle seat 59.

[0057] By disclosing the specific structural design of 5, the various components are compactly installed around the handle device 5, making it easy for personnel to operate and use.

[0058] A method for operating an adjustable bendable conformal ablation needle device under laparoscopy includes the following steps: The first step is to establish a laparoscopic channel: After the patient is under general anesthesia, the doctor creates several trocars in the abdominal wall, inserts a laparoscope and other necessary operating instruments, and establishes a minimally invasive surgical channel. The second step is device introduction and initial positioning: The distal end of the device is inserted into the abdominal cavity via a suitable trocar. Under direct visualization with high-definition laparoscopy, the device is initially positioned near the target liver tumor area. Initially, the protective component 1 completely shields the conformal needle assembly 2. The third step is to precisely adjust the bend: Since the tumor is often at an angle to the trocar entrance, it is difficult to reach it in a straight line. The doctor begins to rotate the bend adjustment knob 576 on the handle.

[0059] The rotation of the bending control knob 576 drives the adjustment gear 574 on it to rotate via the bending control shaft 592.

[0060] The adjusting gear 574 simultaneously meshes with the upper and lower bending control gears 573, driving them to rotate in opposite directions.

[0061] The bending control gear 573 drives the winding wheel 571 to rotate in both directions via the winding shaft 572, thereby precisely winding and unwinding the two bending control tube ropes 32.

[0062] The pulling of the control tube rope 32 causes the control tube 31, which is composed of multi-spiral rotary cutting tubes, to produce a controllable unidirectional 0-90° or S-shaped bend, which ultimately drives the entire conformal needle assembly 2 at the front end to precisely adjust the angle so that the expected unfolding direction of the ablation needle is "directly facing" the surface of the tumor tissue.

[0063] When the ideal bending angle is reached, the locking pin 578 inside the bending control knob 576 automatically engages with the corresponding socket 591 on the right handle seat 59 under the action of the compression spring 577, reliably locking the current bending angle and preventing accidental displacement during the operation.

[0064] Step 4, conformal needle coverage: After aligning the angle, loosen the locking screw 54, pull the protective component 1 backward to move it backward, fully exposing the openings on the sides of the upper conformal needle seat 21 and the lower conformal needle seat 24.

[0065] Push the four fitting push buttons 584 of the fitting adjustment section 58 forward. Each fitting push button 584 transmits the tension to the corresponding needle seat 232 by pulling the fitting cord 27 connected to it.

[0066] The compression spring 234 pushes the pin seat 232 and the ablation needle 231 outward. The ablation needle 231 is pushed out radially from the through hole 243 and pierces the tumor tissue and the surrounding safe edge.

[0067] Based on the irregular shape of the tumor, such as approximately square, rectangular, or irregular polygon, the front and rear positions of the four conformal push buttons 584 are adjusted independently and asynchronously, thereby independently controlling the extension depth and radial spread distance of the four ablation needles to form a "conformal" ablation area that highly matches the shape of the tumor, ensuring complete coverage of the lesion.

[0068] The damping ring 587 installed on the conformal push button 584 provides appropriate frictional resistance, allowing the push button to remain stably in any intermediate position, achieving stepless adjustment and positioning of the ablation needle spacing.

[0069] Step 5, Monitoring and Ablation Treatment: Optional step: Real-time monitoring: Before applying the pulse, a thin temperature sensor or other detection probe can be inserted through the channel guide tube 586 at the end of the handle. The probe reaches the ablation needle area directly through the central working channel formed by the inner channel tube 22 and the central cavity of the five-lumen tube 25 and the channel guide tube 586, and monitors the physiological parameters such as temperature and impedance of the treatment area in real time, providing feedback for the treatment.

[0070] Pulse ablation: After confirming that all ablation needles are in the correct positions, connect the device to an external high-voltage pulse generator via tail wire 6. Apply preset electrical pulse parameters such as field strength, pulse width, and frequency to perform irreversible electroporation ablation on the tumor tissue.

[0071] Step 6: Organize sampling and withdraw equipment: Optional biopsy sampling: Before or after treatment, a biopsy needle can be inserted through the central working channel to take tissue samples from the target area for preoperative pathological diagnosis or postoperative efficacy comparison analysis.

[0072] Needle removal and repositioning: After treatment and sampling are completed, pull the conformal push button 584 back to the initial position. The conformal needle pull cord 27 pulls the needle seat 232 and ablation needle 231 inward and presses the compression spring 234, so that the four ablation needles automatically and synchronously retract into the protective sleeve 11.

[0073] Rotate the bending control knob 576 back to its initial position to restore the bending control tube 31 to a straight state.

[0074] Push the protective assembly 1 forward to the front end to ensure that all ablation needles 231 are fully protected, and turn the locking screw 54 to secure it.

[0075] Finally, the entire device was smoothly removed from the Trocar channel.

[0076] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions conceived without creative effort should be included within the scope of protection of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A laparoscopic adjustable bend conformal ablation needle device, comprising a conformal needle assembly (2), wherein a bend control tube assembly (3) is fixed to the rear end of the conformal needle assembly (2), an extension rod (4) is fixed to the rear end of the bend control tube assembly (3), a handle device (5) is fixed to the rear end of the extension rod (4), and a protective assembly (1) is sleeved on the outside of the conformal needle assembly (2), the bend control tube assembly (3), the extension rod (4), and the handle device (5), characterized in that, After the protective component (1) moves back and forth, it hides the ablation needle component (23) at the front end of the fitting needle assembly (2). The handle device (5) includes a bending adjustment part (57) and a fitting needle adjustment part (58). The bending adjustment part (57) is connected to the bending tube assembly (3) so that the bending tube assembly (3) and the protective component (1) remain bent to both sides. The fitting needle adjustment part (58) is connected to the fitting needle assembly (2) so that the ablation needle component (23) passes through the front end of the protective component (1) and moves radially.

2. The adjustable bendable conformal ablation needle device for laparoscopy according to claim 1, characterized in that: The protective component (1) includes a protective tube (12), with a protective sleeve (11) fixed to the front end of the protective tube (12). The protective sleeve (11) has a perforation inside. The fitting assembly (2) includes a five-lumen tube (25) and a channel inner tube (22). The five-lumen tube (25) has a central hole (252). The fitting adjustment part (58) includes a channel guide tube (586). The perforation inside the protective sleeve (11), the central hole (252), the channel inner tube (22), and the channel guide tube (586) form a central channel.

3. The adjustable bendable conformal ablation needle device for laparoscopy according to claim 1, characterized in that: The fitting assembly (2) includes a five-lumen tube (25), which is disposed inside the extension rod (4). A lower fitting seat (24) is inserted and fixed at the front end of the five-lumen tube (25). Multiple ablation needle assemblies (23) are elastically slidably disposed inside the lower fitting seat (24). An insulating wire (26) is electrically connected to one side of the ablation needle assembly (23). A fitting needle pull rope (27) is also connected and fixed to one side of the ablation needle assembly (23). The fitting needle pull rope (27) and the insulating wire (26) pass through the five-lumen tube (25). The fitting needle pull rope (27) is connected and fixed to the fitting needle adjustment part (58).

4. The adjustable bendable conformal ablation needle device for laparoscopy according to claim 3, characterized in that: The ablation needle assembly (23) includes an ablation needle (231) with a threaded tail and a needle seat (232). A connector (233) is inserted into the needle seat (232). The tail of the ablation needle (231) passes through the needle seat (232) and is threadedly connected and fixed to the internal threaded hole in the connector (233). One end of the connector (233) is electrically connected and fixed to the insulating wire (26). The tail of the needle seat (232) is connected and fixed to the conformal needle pull cord (27). A compression spring (234) is provided inside the needle seat (232). The compression spring (234) is elastically disposed inside the needle seat (232) and between the inner tube (22) of the channel.

5. The adjustable bendable conformal ablation needle device for laparoscopy according to claim 3, characterized in that: The fitting adjustment part (58) includes a rear sleeve (585), a pull rope guide block (583) is fixed inside the rear sleeve (585), and a plurality of sliding grooves are fixed inside the rear sleeve (585). A fitting push button (584) is slidably arranged in the sliding groove. The fitting push button (584) is fixedly connected to the fitting needle pull rope (27). A plurality of damping rings (587) are fixed on the fitting push button (584). The damping rings (587) are disposed on the inner wall of the rear sleeve (585) and the outer surface of the pull rope guide block (583).

6. A laparoscopic adjustable conformal ablation needle device according to any one of claims 1-5, characterized in that: The bending control tube assembly (3) includes a bending control tube (31), which is disposed inside the protective tube (12). The upper and lower ends of the inner side of the bending control tube (31) are fixed with bending control tube ropes (32). The bending control tube ropes (32) pass through the extension rod (4) and are connected to the bending control adjustment part (57). The bending control tube ropes (32) at the upper and lower ends are adjusted by the bending control adjustment part (57) so that one of the bending control tube ropes (32) is stretched and the other bending control tube rope (32) is released, so that the bending control tube (31) bends.

7. The adjustable bendable conformal ablation needle device for laparoscopy according to claim 6, characterized in that: The bending control adjustment part (57) includes a rotatable winding wheel (571) disposed in the handle device (5). The upper and lower winding wheels (571) are driven by a gear combination so that the upper and lower winding wheels (571) rotate in opposite directions. The bending control tube pull rope (32) is fixed to the outer surface of the winding wheel (571).

8. The adjustable bendable conformal ablation needle device for laparoscopy according to claim 7, characterized in that: The gear assembly includes a bending control gear (573) that is poweredly connected to the winding reel (571), and an adjusting gear (574) meshing between the bending control gears (573). A handle assembly that can be locked after rotation is provided on one side of the adjusting gear (574).

9. The adjustable bendable conformal ablation needle device for laparoscopy according to claim 8, characterized in that: The handle assembly includes a bending control shaft (592) fixed inside the adjusting gear (574). The bending control shaft (592) is rotatably connected to the handle device (5). A bending control knob (576) is fixed on one side of the bending control shaft (592). An elastic block slot structure is provided between the bending control knob (576) and the outer shell of the handle device (5) to keep the bending control knob (576) and the outer shell of the handle device (5) fixed.

10. The adjustable bendable conformal ablation needle device for laparoscopy according to claim 9, characterized in that: The elastic block slot structure includes multiple connecting seats (590) fixed to one side of the bending control knob (576). The connecting seats (590) are elastically provided with telescopic locking pins (578). The outer shell of the handle device (5) is provided with multiple insertion holes (591) arranged in a circular array. After the locking pins (578) extend out of the locking pin baffle (579), they are engaged and fixed with the insertion holes (591).

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