Adjustable bend handle, adjustable bend catheter and ablation device

Abstract

The present application relates to a bending handle, an adjustable-bend catheter, and an ablation device. The bending handle is used to control the bending of a tube installed at its distal end. The bending handle includes a handle body, a traction unit, and a bending assembly. The traction unit includes a traction block connected to the distal end of the tube body. The traction block is movably arranged in the handle body along the axial direction to drive the distal end of the tube body to bend. The bending assembly is connected to the traction block and can rotate circumferentially relative to the handle body to drive the traction block to move axially. The present application can achieve the bending of the distal end of the tube body by controlling the rotation of the bending assembly, so that the bending state of the distal end of the tube body can be flexibly adjusted according to the individual differences in the specific anatomical structure of the human body. The surgical process no longer requires multiple positioning and ablation procedures, which simplifies the operation process during catheter ablation surgery.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a bending handle, an adjustable bending catheter and an ablation device. Background Art

[0002] Atrial fibrillation (AF) is one of the most common arrhythmias in clinical practice. It is characterized by the loss of orderly electrical activity of the atria under the control of sinus rhythm, which is replaced by rapid and disordered fibrillation waves. As a result, the atria lose effective contraction and relaxation, the pumping function deteriorates or is lost, and the ventricles respond extremely irregularly. It is one of the main causes of sudden cardiac death.

[0003] Effective treatments for atrial fibrillation are all aimed at restoring sinus rhythm, and are mainly divided into two categories: drug therapy and non-drug therapy. Drug therapy is mainly suitable for patients with first-time atrial fibrillation and paroxysmal atrial fibrillation who have no relevant contraindications. Drug therapy can control ventricular heart rate and ensure basic heart function, such as beta-blockers, amiodarone, digitalis, etc. Non-drug treatments mainly include anticoagulant therapy, electrical cardioversion, surgical maze surgery, and catheter ablation. Catheter ablation mainly uses an ablation catheter to deliver the ablation catheter to the target part of the human body by interventional means, and ablation is performed by applying a certain amount of ablation energy.

[0004] However, many ablation catheters currently on the market are unable to flexibly reach different parts of the tissue and do not have the function of flexibly adjusting the distal shape of the ablation catheter according to the individual differences in the specific anatomical structure of the human body. As a result, multiple positioning and ablation procedures need to be performed during the operation due to the replacement of appropriate catheters, making the operation complicated and time-consuming. Summary of the invention

[0005] In order to solve the above problems, the present application discloses a bending handle, an adjustable bending catheter and an ablation device to achieve flexible adjustment of the shape of the distal end of the ablation catheter.

[0006] In order to solve the above technical problems, this application adopts the following technical solutions:

[0007] According to the first aspect of the present application, the present application provides a bending adjustment handle for controlling the bending of a tube body installed at its distal end, the bending adjustment handle comprising a handle body, a traction unit and a bending adjustment assembly, the traction unit comprising a traction block for connecting to the distal end of the tube body, the traction block being movably arranged in the handle body along the axial direction of the handle body to drive the distal end of the tube body to bend, the bending adjustment assembly being connected to the traction block and being able to rotate circumferentially relative to the handle body to drive the traction block to move axially.

[0008] According to a second aspect of the present application, the present application provides an adjustable curved conduit, comprising:

[0009] The aforementioned bending handle;

[0010] A tube body, the proximal end of which is connected to the handle body, and the distal end of the tube body is provided with an adjustable bend section;

[0011] The number of the traction lines corresponds to the number of the traction blocks, and the proximal ends of the traction lines are connected to the traction blocks, and the distal ends of the traction lines are connected to the adjustable bending sections.

[0012] According to a third aspect of the present application, the present application provides an ablation device, comprising:

[0013] The aforementioned adjustable curved conduit; and

[0014] The ablation component is arranged at the distal end of the tube body and is used for ablating and isolating the target tissue area.

[0015] It can be seen from the above technical solutions that the embodiments of the present application have at least the following advantages and positive effects:

[0016] The bending adjustment handle of the embodiment of the present application can be used as an independent driving device to control the bending of the tube body installed at its distal end, so that the tube body can flexibly reach different parts of the curved vascular tissue. In actual operation, the traction block can be connected to the distal end of the tube body. Since the bending adjustment component rotates relative to the handle body, the bending adjustment component can drive the traction block to move along the axial direction of the handle body, that is, when the bending adjustment component rotates forward, the traction block moves toward the proximal end, and the tube body is pulled and bent by the traction block. When the bending adjustment component rotates in the opposite direction, the traction block moves toward the distal end, the force that pulls and bends the tube body is released, and the tube body returns to its initial state. It can be seen from this that the present application can achieve the bending of the distal end of the tube body by controlling the rotation of the bending adjustment component, so that the bending state of the distal end of the tube body can be flexibly adjusted according to the individual differences in the specific anatomical structure of the human body, and the surgical process no longer requires multiple positioning and ablation procedures. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 This is a schematic structural diagram of an ablation device according to a first embodiment of the present application;

[0019] Figure 2 for Figure 1 A schematic diagram of a local enlarged structure of the ablation device A is shown;

[0020] Figure 3 for Figure 1 A schematic diagram of the exploded structure of the ablation device shown;

[0021] Figure 4 for Figure 1 A schematic diagram of the internal structure of the ablation device shown;

[0022] Figure 5 for Figure 4 A schematic diagram of the exploded structure of the ablation device shown;

[0023] Figure 6 for Figure 4 A schematic diagram of the structure of a pulling rod and a pulling button in the ablation device shown;

[0024] Figure 7 for Figure 3 A schematic diagram of the structure of the bending adjustment component and the traction unit in the ablation device shown;

[0025] Figure 8 for Figure 3 A schematic structural diagram of a first traction block in the ablation device shown;

[0026] Fig. 9 for Figure 8 A schematic structural diagram of the first traction block from another perspective;

[0027] Fig.10 for Figure 3 A schematic diagram of the structure of the support shaft in the ablation device shown;

[0028] Fig.11 for Fig.10 A schematic diagram of the cross-sectional structure along the section line AA;

[0029] Fig.12 for Fig.10 A schematic diagram of the cross-sectional structure along the section line BB;

[0030] Fig.13 This is a schematic diagram of the explosion structure of the ablation device according to the second embodiment of the present application;

[0031] Fig.14 for Fig.13 A schematic diagram of a portion of the structure of a pulling assembly in the ablation device shown;

[0032] Fig.15 for Fig.14 A schematic cross-sectional structure diagram of a pulling assembly in the ablation device shown;

[0033] Fig.16 A partial structural schematic diagram of an ablation device according to a third embodiment of the present application;

[0034] Fig.17 for Fig.16A schematic diagram of the structure of a pulling assembly in the ablation device shown;

[0035] Fig.18 This is a structural diagram of the bending adjustment assembly and the traction unit in the ablation device of the fourth embodiment of the present application.

[0036] The following are the descriptions of the reference numerals:

[0037] 100 ablation device; 1, adjustable bend catheter; 2, ablation assembly; 21, support frame; 211, bearing frame; 212, conductive frame; 213, bearing rod; 214, pillar; 22, ablation electrode; 3a, bend handle; 3, handle body; 30, gripping area; 31, movable hole; 311, first slide rail; 3111, fixing groove; 3112, anti-slip pad; 312, second slide rail; 321, first semi-cylinder; 3211, third thread; 322, second semi-cylinder; 3221, fourth thread; 323, composite thread segment; 324, pin; 325, pin hole; 326, arc convex rib; 331, first shell; 332, second shell; 330, accommodating chamber; 34, traction unit; 341, first traction block; 3411, first thread; 3412, perforation; 3413, insertion end; 3414, exit end; 3415, track groove; 3416, first thread segment; 3417, first limiting segment; 3418, first convex rib; 3419, first threading hole; 342, second traction block; 3421, second thread; 3426, second thread segment; 3427, second limiting segment; 3428, second convex rib; 3429, second threading hole; 343, first internal thread; 3 44, second internal thread; 37, support shaft; 370, limit groove; 371, slide rail; 372, internal channel; 373, bonding position; 374, glue injection groove; 375, three-way entrance; 376, threaded hole; 38, three-way valve; 391, sealing cover; 392, sealing ring; 4, tube body; 41, reference electrode; 5, inner sheath core; 6, bending adjustment component; 61, rotating wheel; 611, rotating part; 612, threaded part; 62, linkage block; 621, plug block; 622, plug strip; 63, rubber ring; 64, rotary cylinder; 641, plug strip; 65, rotary shaft; 651, end cover; 66, rotary wheel; 661, linkage Moving block; 662, plug-in block; 7, pulling button; 70, bonding groove; 701, first slope; 702, second section; 703, wave crest; 71, pulling rod; 711, rod body; 712, connecting shaft; 713, sliding part; 7131, sheath core through hole; 7132, glue injection hole; 7133, slide rail groove; 7134, functional hole; 8, connector; 81, wire tube; 9, pulling assembly; 91, pulling slider; 911, sheath core through hole; 912, slide groove; 913, glue injection hole; 914, wire through hole; 92, pulling rod; 921, installation cavity; 922, limit block; 93, pulling knob. DETAILED DESCRIPTION

[0038] To facilitate understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] For ease of understanding, in the description of this application, for the same moving object, the term "forward direction" refers to the clockwise direction, the term "forward rotation" refers to rotation in the clockwise direction, the term "reverse" refers to the counterclockwise direction, and the term "reverse rotation" refers to rotation in the counterclockwise direction. Alternatively, for the same moving object, the term "forward direction" refers to the counterclockwise direction, the term "forward rotation" refers to rotation in the counterclockwise direction, the term "reverse" refers to the clockwise direction, and "reverse rotation" refers to rotation in the clockwise direction. In addition, for different moving objects, the interpretation of "forward rotation" can be the same or different. For example, "forward rotation" can be interpreted as rotation in the clockwise direction, or "forward rotation" can be interpreted as one / a part of different moving objects rotating in the clockwise direction and the other / another part rotating in the counterclockwise direction.

[0041] For ease of expression, in the field of intracavitary interventional treatment, the proximal end refers to the end of the instrument closer to the operator after the instrument is used for interventional treatment, and the distal end refers to the end of the instrument farther away from the operator after the instrument is used for interventional treatment.

[0042] See also Figure 1 The present application provides an ablation device 100, which can ablate and isolate a target tissue area. The target tissue area can be located in the heart, including but not limited to the mitral isthmus, the tricuspid isthmus, the top of the left atrium, the pulmonary vein, or a triggering focus with typical atrial flutter and non-pulmonary vein origin (such as the left atrial appendage, the superior vena cava, the coronary sinus ostium), etc. It can be understood that the target tissue area is not limited to being located in the heart, and can also be located on other body tissues.

[0043] The ablation device 100 includes an adjustable bend catheter 1 and an ablation assembly 2. The ablation assembly 2 is disposed at the distal end of the adjustable bend catheter 1. The adjustable bend catheter 1 is used to drive the ablation assembly 2 disposed at its distal end to intervene in the target tissue area, so as to ablate and isolate the target tissue area. Figure 1The diagram shows that the adjustable bend catheter 1 includes a bend adjustment handle 3a and a tube body 4, wherein the proximal end of the tube body 4 is connected to the bend adjustment handle 3a, and the distal end of the tube body 4 is connected to the ablation component 2. The bend adjustment handle 3a can control the bending of the tube body 4, thereby being able to flexibly adjust the shape of the distal end of the tube body 4 according to the individual differences in the specific anatomical structure of the human body, so that the tube body 4 reaches the target tissue area, thereby enabling the ablation component 2 to reach the target tissue area.

[0044] The ablation component 2 can expand and expand radially. The radially expanded and expanded ablation component 2 can perform annular ablation isolation of tissue regions such as the pulmonary vein orifices, or perform focal ablation of, for example, the isthmus of the mitral valve, to prevent abnormal electrical propagation and / or destroy abnormal electrical conduction through cardiac tissue, treat arrhythmias, and reduce the risk of many potentially fatal complications. Among them, there are many explanations for the ablation component 2 being able to expand and expand radially. For example, the ablation device 100 is provided with a sheath (not shown) sleeved on the outside of the tube body 4. The sheath is used to radially compress the ablation component 2 so that the radially compressed ablation component 2 is accommodated in the internal channel of the sheath. The radially compressed ablation component 2 can be delivered to the target tissue region in the sheath, that is, the ablation component 2 is accommodated in the sheath before being released. When reaching the target tissue region, the ablation component 2 can extend out of the sheath and expand and expand naturally. Reference Figure 2 The ablation component 2 includes a support frame 21 and an ablation electrode 22 arranged on the support frame 21. The support frame 21 can adopt a self-expanding stent with a shape memory function, such as a nickel-titanium alloy stent with a shape memory function. The ablation electrode 22 can be made of platinum-iridium alloy, gold alloy, stainless steel, nickel-titanium or any other biocompatible medical metal. The expansion of the ablation component 2 in the present application means that the support frame 21 can expand radially and expand, and the ablation electrode 22 may change its radial position as the support frame 21 expands, and the ablation electrode 22 itself does not expand. Alternatively, the ablation component 2 can expand radially and expand under human control intervention.

[0045] Please still refer to Figure 2 In this embodiment, the support frame 21 includes a bearing frame 211 and a conductive frame 212. The bearing frame 211 is arranged at the distal end relative to the conductive frame 212. The distal end of the conductive frame 212 is connected to the proximal end of the bearing frame 211, and the proximal end 1 of the conductive frame 212 is connected to the distal end of the tube body 4. The conductive frame 212 is conductive, and the ablation electrode 22 is arranged on the bearing frame 211. The conductive frame 212 and the ablation electrode 22 are respectively connected to two output terminals of an energy generator (such as an ablation device, etc.) at the proximal end of the bending handle 3a to transmit the ablation energy output by the energy generator to the target tissue area, so that the surrounding tissue cells are necrotic under the action of the ablation energy of the energy generator, so as to prevent the propagation of abnormal electrical signals and achieve the purpose of treating the disease. The ablation energy can be pulse energy, radio frequency energy or other forms of energy.

[0046] Further, the bearing frame 211 may include a plurality of bearing rods 213, which are arranged around the central axis of the support frame 21 at circumferential intervals. The distal ends of the plurality of bearing rods 213 converge and connect together, and each bearing rod 213 is provided with a plurality of ablation electrodes 22. At the same time, the proximal ends of the plurality of bearing rods 213 also converge and connect together, and are connected to the distal end of the tube body 4. The position of the bearing rod 213 that is radially farthest from the central axis of the tube body 4 is called the outermost end. The ablation electrode 22 in this embodiment is arranged between the outermost end and the farthest end of the bearing rod 213, so as to ensure that the ablation electrode 22 can better conform to the atrial tissue and maintain good wall adhesion. In this embodiment, the bearing rod 213 is arc-shaped, and the plurality of bearing rods 213 are spherical as a whole. The number of the plurality of bearing rods 213 used in the support frame 21 can be two, four, six, eight, ten, twelve or any other suitable number. In this embodiment, the number of the bearing rods 213 is six. The plurality of bearing bars 213 may be evenly or unevenly spaced circumferentially.

[0047] Indicatively, Figure 2 As shown, two ablation electrodes 22 are arranged at intervals along the axial direction on each bearing rod 213 of this embodiment, and they are ring-shaped electrodes. In multiple bearing rods 213, multiple ablation electrodes 22 correspond to each other along the axial direction. It can be understood that the number of ablation electrodes 22 can be reasonably set according to actual conditions, and the shape of the ablation electrodes 22 can also be sheet-shaped, spherical, dot-shaped or other shapes, which are not limited in this embodiment.

[0048] Furthermore, if Figure 2 As shown, the conductive frame 212 can be a grid structure with multiple pillars 214 connected end to end, the proximal end of the grid structure is connected to the distal end of the tube body 4, and the distal end of the grid structure is connected to the proximal ends of several bearing rods 213. The grid structure helps to improve the supporting performance of the supporting frame 21.

[0049] Continue to refer Figure 2 The ablation device 100 may further include an inner sheath core 5, the distal end of which is connected to the distal end of the support frame 21, and the inner sheath core 5 is movably arranged in the tube body 4 so as to be able to move relative to the tube body 4 along the axial direction, thereby controlling the radial contraction or expansion of the support frame 21. The bending handle 3a includes a handle body 3, which can be understood as a gripping portion of the bending handle 3a, and the inner sheath core 5 can extend from the distal end of the handle body 3 to the proximal end of the handle body 3, thereby facilitating the control of the inner sheath core 5 to move along the axial direction.

[0050] A reference electrode 41 may also be provided on the inner sheath core 5 and / or the tube body 4, and the connection methods of the reference electrode 41 include but are not limited to welding, clamping, bonding, integrated molding, etc. In the present embodiment, the number of reference electrodes 41 includes three, of which two reference electrodes 41 are provided on the tube body 4, two reference electrodes 41 are provided at intervals along the central axis of the tube body 4, and the remaining reference electrode 41 is provided on the inner sheath core 5. It should be noted that the number of reference electrodes 41 is only used for illustration and is not specifically limited in the embodiments of the present application. In the present embodiment, the reference electrode 41 is a ring electrode. In some other embodiments, the reference electrode 41 may also be a sheet electrode, a point electrode, etc., which is not specifically limited in the present embodiment.

[0051] The reference electrode 41 may be made of metal materials such as platinum, iridium, gold, silver, etc. The axial length of the reference electrode 41 may be 1.2 mm. It should be noted that the size of the reference electrode 41 is only for illustration and does not constitute a specific limitation.

[0052] The first function of the reference electrode 41 is to serve as a reference electrode 41, that is, to be used for ECG signal mapping to obtain a reference potential. The second function of the reference electrode 41 is to serve as a positioning electrode of a three-dimensional mapping system, that is, to be used to display the body of the tube 4 / inner sheath core 5 during the three-dimensional modeling process.

[0053] refer to Figure 1 and Figure 2 The bending handle 3a can also control the axial movement of the inner sheath core 5, so that when the ablation component 2 reaches the target tissue area, the operator can control the axial movement of the inner sheath core 5 while holding the handle body 3, thereby controlling the size of the ablation component 2 through the movement of the inner sheath core 5, so as to further facilitate the ablation component 2 to retract the sheath or conform to the target tissue area.

[0054] The ablation device 100 also includes a bending adjustment component 6 and a pulling button 7. The bending adjustment component 6 is connected to the distal end of the handle body 3 and extends out of the outer wall of the handle body 3. The portion of the bending adjustment component 6 extending out of the outer wall of the handle body 3 can be rotated by the user when the user holds the proximal end of the handle body 3 with one hand to drive the distal end of the tube body 4 to bend. The pulling button 7 is connected to the inner sheath core 5 and controls the inner sheath core 5 to move axially. The pulling button 7 is connected to the distal end of the handle body 3 and exposed to the outer wall of the handle body 3. The pulling button 7 can be pulled by the user when the user holds the proximal end of the handle body 3 with one hand to drive the inner sheath core 5 to move axially. That is, when the proximal end of the handle body 3 is held with one hand, the thumb of the hand can control the portion of the bending adjustment component 6 extending out of the outer wall of the handle body 3 and the pulling button 7. Figure 1It shows that the bending adjustment component 6 and the pulling button 7 are arranged at intervals along the axial direction, and the portion of the bending adjustment component 6 extending out of the outer wall of the handle body 3 is located at the distal end of the pulling button 7. The portion of the bending adjustment component 6 extending out of the outer wall of the handle body 3 is located at the distal end of the handle body 3 to adapt to the usage habit of holding the handle body 3 by hand for rotational operation, which is convenient and simple to operate.

[0055] It should be noted that a gripping area 30 with damping lines may be provided at the proximal end of the handle body 3, and the contour shape of the gripping area 30 may be ergonomically designed to fit the gripping shape of a human hand. When the four fingers of a human hand except the thumb grip the gripping area 30, the user's thumb may extend toward the distal end to rotate the bending adjustment component 6 or toggle the pulling button 7.

[0056] In summary, when the ablation device 100 of the present application is actually operated to allow the tube body 4 to intervene in a blood vessel, the operator can, under the premise of holding the proximal end of the handle body 3 with one hand, use the holding hand to rotate the bending adjustment component 6 at the distal end of the handle body 3 to drive the distal end of the tube body 4 to bend, thereby being able to flexibly adjust the bending state of the distal end of the tube body 4 according to the individual differences in the specific anatomical structure of the human body's lumen, so that the ablation component 2 set at the distal end of the tube body 4 can reach the target tissue area. After the ablation component 2 reaches the target tissue area, the operator can further use the holding hand to push the pulling button 7 at the distal end of the handle body 3 while keeping holding the proximal end of the handle body 3 with one hand, so as to drive the inner sheath core 5 to move axially through the pulling button 7, thereby controlling the radial expansion or contraction of the ablation component 2 through the inner sheath core 5, so that the ablation component 2 can adapt to the shape or size of the target tissue area.

[0057] It can be seen that the technical solution of the present application realizes the whole one-handed operation during the catheter ablation interventional surgery, and simplifies the operation process during the catheter ablation surgery. It should be understood that in other embodiments, without considering the one-handed holding control mentioned above, there may be any other possibilities for the relative setting positions of the bending adjustment component 6 and the pulling button 7, and the present application does not impose too many restrictions on this. For example, the bending adjustment component 6 can be set at the distal end and the pulling button 7 can be set at the proximal end. In addition, the ablation device 100 of the present application can also be configured to only realize the function of adjusting the bending of the tube body 4 without the function of adjusting the diameter of the ablation component 2, and the bending adjustment handle formed by the combination of the handle body 3 and the bending adjustment component 6 can be manufactured and sold separately, and used in conjunction with the external tube body 4.

[0058] In order to facilitate understanding of how the pulling button 7 is turned to drive the inner sheath core 5 to move axially, and how the bending adjustment component 6 is rotated to drive the distal end of the tube body 4 to bend, the present application will be described in detail below.

[0059] In order to ensure that the pull button 7 can drive the inner sheath core 5 to move axially when being pulled, refer to Figure 3The ablation device 100 also includes a pulling rod 71 arranged in the handle body 3. The pulling rod 71 extends to the proximal end and the distal end of the handle body 3 at opposite ends of the axial direction. The proximal end of the pulling rod 71 is connected to the inner sheath core 5, and the distal end of the pulling rod 71 is connected to the pulling button 7 located on the outer wall of the distal end of the handle body 3. When the pulling button 7 is pulled, the pulling button 7 indirectly drives the inner sheath core 5 to move axially through the pulling rod 71.

[0060] refer to Figure 4 and Figure 5 The handle body 3 is provided with an axially extending active hole 31, and the pulling button 7 moves axially in the active hole 31. When the pulling button 7 moves along the active hole 31 to the distal end of the active hole 31, the axial size of the ablation component 2 increases, and the radial size decreases. The ablation component 2 is driven by the pulling button 7 and the pulling rod 71 to be in a radial contraction state. When the pulling button 7 moves along the active hole 31 to the proximal end of the active hole 31, the axial size of the ablation component 2 decreases, and the radial size increases. The ablation component 2 is driven by the pulling button 7 and the pulling rod 71 to be in a radial expansion state. When the structure is designed, it can be ensured that when the pulling button 7 moves to the most distal limit point of the active hole 31, the ablation component 2 is in a radially completely contracted state, which means that the ablation component 2 can at least be accommodated in the sheath, or the radial size of the ablation component 2 is smaller than the blood vessel size. At the same time, when the pulling button 7 moves to the most proximal limit point of the active hole 31, the ablation component 2 can be in a maximum radial expansion and expansion state. In addition, the outer surface of the pull button 7 includes a first slope 701 and a second slope 702 protruding from the active hole 31, and the first slope 701 and the second slope 702 are arranged along the axial direction and intersect at the inner side of the pull button 7 to form a wave crest 703. The first slope 701 and the second slope 702 can be provided with a pattern for increasing friction damping to ensure that when the proximal end of the handle body 3 is held by one hand and the first slope 701 is moved to the distal end, the pull button 7 can be easily moved to the distal end of the active hole 31, and when the user holds the proximal end of the handle body 3 by one hand and moves the second slope 702 to the proximal end, the pull button 7 can be easily moved to the proximal end of the active hole 31.

[0061] The pulling rod 71 includes a rod body 711, a connecting shaft 712 and a sliding member 713. The connecting shaft 712 and the sliding member 713 are respectively arranged at opposite ends of the rod body 711 along the axial direction. The connecting shaft 712 is connected to the pulling button 7, for example Figure 6It is shown that the pulling button 7 is provided with an adhesive groove 70, and a part of the structure of the connecting shaft 712 is embedded in the adhesive groove 70 and bonded to the pulling button 7 in the adhesive groove 70, thereby realizing the fixed connection between the connecting shaft 712 and the pulling button 7. It should be understood that in other embodiments, the adhesive groove 70 can also be provided on the connecting shaft 712, and in this case, a part of the structure of the pulling button 7 is embedded in the adhesive groove 70. Of course, in addition to the above-mentioned bonding, the connection method between the connecting shaft 712 and the pulling button 7 can also adopt any other fixed connection structure, such as a threaded connection or a snap connection between the connecting shaft 712 and the pulling button 7. The sliding member 713 is connected to the proximal end of the inner sheath core 5, for example Figure 6 It is shown that the sliding member 713 is provided with a sheath core through hole 7131 and a glue injection hole 7132, the sheath core through hole 7131 extends axially, and the glue injection hole 7132 is connected to the sheath core through hole 7131. When the proximal end of the inner sheath core 5 is inserted into the sheath core through hole 7131, glue can be poured into the glue injection hole 7132 to achieve the connection between the inner sheath core 5 and the sliding member 713 at the proximal end. Of course, in other embodiments, the inner sheath core 5 can also be connected to the sliding member 713 by any other fixing method other than the above method, such as a buckle connection, a knot fixation, etc., which is not limited by the present application.

[0062] It should be noted that, in the process of fixing the inner sheath core 5, the inner sheath core 5 can be inserted into the appropriate position of the sheath core through hole 7131, and then the initial shape of the support frame 21 can be adjusted, and then the glue can be poured from the glue injection hole 7132 to fix the inner sheath core 5. In order to facilitate the adjustment of the initial shape of the support frame 21, the sheath core through hole 7131 can be set to penetrate the sliding member 713. In this way, when the inner sheath core 5 is selected, a sufficiently long inner sheath core 5 can be provided to avoid the problem that the inner sheath core 5 cannot be installed due to insufficient length of the inner sheath core 5. In addition, in the solution described in the present application, the connecting shaft 712 and the sliding member 713 are also respectively located on opposite sides of the rod body 711 in the radial direction, so that the axially extending rod body 711 can be ensured to be arranged as far away from the inner side of the handle body 3 as possible, and the rod body 711 can be ensured to be close to the side wall of the handle body 3 to provide a large enough avoidance space to install the bending module (the bending module is a component used to control the bending of the distal end of the tube body 4, i.e., the traction unit 34, the support shaft 37, the first semi-cylinder 321 and the second semi-cylinder 322 described below). The bending module and the pulling module inside the handle body 3 are arranged radially rather than axially, and the structure is compact. The axial length of the handle body 3 is shortened, so that the user can control the pulling button 7 and the bending component 6 with the holding hand when holding the proximal end of the handle body 3, so as to achieve single-handed holding and control.

[0063] Figure 6It is also shown that the sliding member 713 is provided with a sliding rail groove 7133 for constraining its circumferential movement. The sliding rail groove 7133 extends along the axial direction of the handle body 3. The sliding rail groove 7133 can cooperate with the guide rail provided inside the handle body 3. The circumferential movement of the sliding member 7133 is constrained by the cooperation between the sliding rail groove 7133 and the guide rail inside the handle body 3.

[0064] In some embodiments, in combination Figure 5 and Figure 6 The handle body 3 is provided with a first slide rail 311 and a second slide rail 312 extending axially. The first slide rail 311 and the second slide rail 312 may include any type of a guide rail and a guide groove. In this embodiment, the first slide rail 311 is a convex guide rail, and the second slide rail 312 is a concave guide groove. The sliding member 713 at the proximal end of the rod body 711 is limited to be axially slidably connected to the first slide rail 311. Specifically, the slide rail groove 7133 provided on the sliding member 713 is slidably matched with the first slide rail 311, and the distal end of the rod body 711 is limited to be axially slidably connected to the second slide rail 312. Since both the proximal and distal ends of the rod body 711 are limited to axial movement, the rod body 711 will not have the risk of radial deviation during the axial movement due to its excessive length. The radially deviated rod body 711 may cause the inner sheath core 5 to deviate radially, thereby making the radial expansion degree of the ablation component 2 inaccurate.

[0065] In order to ensure that the inner sheath core 5 can maintain the radial expansion state of the ablation component 2 after the ablation component 2 is pulled to expand radially, the present application can set a fixing groove 3111 on the first slide rail 311, and the ablation device 100 also includes an anti-skid pad 3112, the anti-skid pad 3112 is embedded in the fixing groove 3111 and a part of the structure of the anti-skid pad 3112 protrudes from the fixing groove 3111, and the anti-skid pad 3112 continuously abuts against the sliding member 713. In this way, the friction damping between the anti-skid pad 3112 and the sliding member 713 can maintain the radial expansion state of the ablation component 2.

[0066] Figure 3The handle body 3 is shown to include a first shell 331 and a second shell 332. The first shell 331 and the second shell 332 are detachably snap-fitted and connected to form a receiving chamber 330. The receiving chamber 330 is used to install the rod body 711 and the sliding member 713. The number of the first slide rails 311 is two, and the two first slide rails 311 are respectively arranged on the first shell 331 and the second shell 332 and are opposite to each other. The number of the slide rail grooves 7133 is two, and the two slide rail grooves 7133 are located on the opposite sides of the sliding member 713 in the radial direction. The two sides of the sliding member 713 in the radial direction are respectively connected to the two first slide rails 311 through corresponding anti-slip pads 3112. It should be understood that in other embodiments, the number of the first slide rail 311 and the slide rail groove 7133 can also be set to one. It should also be noted that the glue injection hole 7132 is arranged adjacent to the slide rail groove 7133 , that is, the sliding member 713 is further provided with a glue injection hole 7132 on the surface outside the slide rail groove 7133 , and the glue injection hole 7132 is arranged outside the slide rail groove 7133 .

[0067] Figure 6 It is also shown that the sliding member 713 is provided with an axially extending functional hole 7134, which is arranged side by side with the sheath core through hole 7131, and the functional hole 7134 extends from the distal end of the sliding member 713 to the proximal end of the sliding member 713. The functional hole 7134 can reduce the consumables of the sliding member 713, achieve a lighter sliding member 713, and achieve the purpose of reducing glue and preventing injection molding shrinkage of parts. Among them, the distal end of the electrode wire is connected to the ablation electrode 22 provided on the support frame 21 and the reference electrode 41 at the distal end of the tube body 4, and the proximal end of the electrode wire is connected to the connector 8 ( Figure 3 , 4 Or 5) connection. Specifically, the electrode wire connected to the conductive frame 212 and the electrode wire connected to the reference electrode 41 on the tube body 4 pass through the glue injection groove 374 described below, and then are directly connected to the connector 8. The electrode wire connected to the ablation electrode 22 on the carrier frame 211 and the electrode wire connected to the reference electrode 41 on the inner sheath core 5 pass through the interior of the inner sheath core 5. When the electrode wires are connected to the connector 8 at the tail end of the handle, sufficient margin is left to ensure that the electrode wires in the inner sheath core 5 are not affected when the pulling rod 71 moves.

[0068] The present embodiment does not specifically limit the number of connectors 8. The number of connectors 8 can be one, two, or other suitable numbers. For example, when the number of ablation electrodes 22 and reference electrodes 41 is large, and the number of pin holes for connecting electrode wires on one connector 8 is insufficient, another connector 8 can be added, and the two connectors 8 can be fixedly connected side by side at the proximal end of the handle body 3. The connector 8 is used to connect to the pulse signal source, so that the pulse signal source can transmit a pulse signal to the ablation electrode 22 or the reference electrode 41 through the connector 8, so that the ablation electrode 22 or the reference electrode 41 transmits the pulse signal to the target tissue area for ablation. It should be explained that the ablation electrode 22 can be used for monopolar ablation or bipolar ablation. During monopolar ablation, the ablation electrode 22 on the support frame 21 can be used as one pole, and the other pole can be set outside the body and in contact with human skin. During bipolar ablation, the ablation electrode 22 on the support frame 21 and the conductive frame 212 are matched for positive and negative poles. In other embodiments, some of the ablation electrodes 22 may be used as positive electrodes, and other ablation electrodes 22 may be used as negative electrodes. It is understood that the connector 8 may also be connected to a non-pulse source, for example, the connector 8 may be connected to a radio frequency energy source for radio frequency ablation, or other energy forms. Alternatively, the ablation electrodes 22 may use pulses and radio frequencies for hybrid ablation.

[0069] As mentioned above, the handle body 3 can control the distal bending of the tube body 4 so that the tube body 4 can reach the target tissue area, thereby enabling the tube body 4 to carry the ablation assembly 2 to the target tissue ablation area. Figure 3 The ablation device 100 further includes a traction unit 34, which is movably disposed in the handle body 3 along the axial direction of the handle body 3. The bending adjustment component 6 is connected to the traction unit 34 and can rotate in the positive direction relative to the handle body 3, so that the traction unit 34 can drive the tube body 4 to bend toward one side (defined as the first side). The bending adjustment component 6 can also rotate in the reverse direction relative to the handle body 3, so that the traction unit 34 can drive the tube body 4 to bend toward the other side (defined as the second side). It should be noted that the directions of the first side and the second side are different. The first side and the second side can be set at any angle in the circumferential direction of the tube body 4. For example, the first side and the second side can be 180° apart in the circumferential direction. At this time, the directions of the first side and the second side are parallel and opposite.

[0070] The traction unit 34 includes a first traction block 341 and a second traction block 342 for connecting to the distal end of the tube body 4. The first traction block 341 and the second traction block 342 are arranged radially side by side with at least part of the axial active area and at least part of the rod body 711. The distal end of the tube body 4 is provided with an adjustable bend section. The adjustable bend catheter 1 of the present application also includes a first traction line and a second traction line (not shown). The proximal end of the first traction line is connected to the first traction block 341, and the distal end of the first traction line is connected to one side (first side) of the adjustable bend section of the tube body 4, that is, the first traction block 341 is connected to the first side of the adjustable bend section of the tube body 4 through the first traction line. The proximal end of the second traction line is connected to the second traction block 342, and the distal end of the second traction line is connected to the other side (second side) of the adjustable bend section of the tube body 4, that is, the second traction block 342 is connected to the second side of the adjustable bend section of the tube body 4 through the second traction line. The bending assembly 6 can rotate in the circumferential direction relative to the handle body 3 to simultaneously drive the first traction block 341 and the second traction block 342 to move in opposite directions along the axial direction, so that the direction in which the first traction block 341 drives the adjustable bending section of the tube body 4 to bend when moving toward the proximal end is different from the direction in which the second traction block 342 drives the adjustable bending section of the tube body 4 to bend when moving toward the proximal end. It should be understood that in other embodiments, the traction unit 34 of the present application may also include only the first traction block 341 or the second traction block 342, in which case the movement of the first traction block 341 or the second traction block 342 along the axial direction can drive the adjustable bending section at the distal end of the tube body 4 to bend only toward one side.

[0071] The movement of the first traction block 341 and the second traction block 342 driven by the bending component 6 can be understood as follows: when the bending component 6 rotates forward, the first traction block 341 moves toward the proximal end, the second traction block 342 moves toward the distal end, and the adjustable bending section of the tube body 4 is pulled by the first traction block 341 to bend toward one side (the first side). When the bending component 6 rotates reversely, the first traction block 341 moves toward the distal end, the second traction block 342 moves toward the proximal end, and the adjustable bending section of the tube body 4 is pulled by the second traction block 342 to bend toward the other side (the second side). Based on the above settings, the direction in which the first traction block 341 drives the tube body 4 to bend when it moves toward the proximal end is different from the direction in which the second traction block 342 drives the tube body 4 to bend when it moves toward the proximal end. It can be seen that the present application can realize the bending of the tube body 4 in different directions by controlling the forward and reverse rotation of a bending adjustment component 6, so that the shape of the distal end of the tube body 4 can be flexibly adjusted according to the individual differences in the specific anatomical structure of the human body. The surgical process no longer needs to replace different catheters, that is, it is no longer necessary to perform multiple positioning and ablation procedures in the target tissue area, which can save surgical time to a certain extent. In addition, compared with setting up two separate bending adjustment components 6 to control the first traction block 341 and the second traction block 342 respectively, the present embodiment is more in line with the new functional integration concept design and is convenient for users to operate. It should be understood that in other embodiments of the present application, the number of traction lines can also be set to one.

[0072] In some embodiments, the bending adjustment component 6 is threadedly connected to the first traction block 341 and the second traction block 342. On the basis that the first traction block 341 and the second traction block 342 are movably arranged on the handle body 3 along the axial direction of the handle body 3, the first traction block 341 and the second traction block 342 are also located inside the handle body 3 at the circumferential upper limit of the handle body 3, so that when the bending adjustment component 6 rotates, it can drive the first traction block 341 and the second traction block 342 to move along the axial direction through the threaded coupling effect between it and the first traction block 341 and the second traction block 342. Specifically, refer to Figure 7, the first traction block 341 is provided with a first thread 3411, the second traction block 342 is provided with a second thread 3421, and the bending adjustment component 6 is provided with a third thread 3211 and a fourth thread 3221. Among them, the spiral directions of the first thread 3411 and the second thread 3421 are opposite, the spiral directions of the third thread 3211 and the fourth thread 3221 are opposite, the third thread 3211 is screwed with the first thread 3411, and the fourth thread 3221 is screwed with the second thread 3421. Based on the screwing relationship between the above threads, when the bending adjustment component 6 rotates forward, the bending adjustment component 6 drives the first traction block 341 to move toward the proximal end along the axial direction through the screwing action of the third thread 3211 and the first thread 3411, and at the same time, the bending adjustment component 6 also drives the second traction block 342 to move toward the distal end along the axial direction through the screwing action of the fourth thread 3221 and the second thread 3421. When the bending adjustment component 6 rotates in the opposite direction, the bending adjustment component 6 drives the first traction block 341 to move axially toward the distal end through the screwing action of the third thread 3211 and the first thread 3411. At the same time, the bending adjustment component 6 also drives the second traction block 342 to move axially toward the proximal end through the screwing action of the fourth thread 3221 and the second thread 3421.

[0073] Combination Figure 3 and Figure 7 The bending adjustment component 6 includes a first semi-cylinder 321 and a second semi-cylinder 322 that are detachably connected. After the first semi-cylinder 321 and the second semi-cylinder 322 are buckled together, two continuous internal thread structures with opposite spiral directions are formed on their inner walls. For the sake of easy distinction, the two continuous internal thread structures are defined here as a first internal thread 343 and a second internal thread 344 respectively. Figure 3 and Figure 7 It is also shown that the first semi-cylinder 321 is provided with a pin 324, and the second semi-cylinder 322 is provided with a pin hole 325. When the first semi-cylinder 321 and the second semi-cylinder 322 are buckled, the pin 324 is inserted into the pin hole 325 to realize the buckling connection between the first semi-cylinder 321 and the second semi-cylinder 322. In the structural design, the end faces of the first semi-cylinder 321 and the second semi-cylinder 322 that are buckled with each other are defined as the joint end, and the matching clearance between the pin 324 and the pin hole 325 on the radial side away from the joint end is greater than the matching clearance between the pin 324 and the pin hole 325 on the radial side close to the joint end, and the opening of the pin hole 325 on the radial side away from the joint end is filled with glue to realize the tight fit of the pin 324 in the pin hole 325. This method mainly leaves enough gap for filling glue on the basis of the precise buckling of the two semi-cylinders to make the two fit together precisely, and at the same time cooperates with the clamping structure inside the handle body 3 to jointly limit the non-circumferential degree of freedom of the two semi-cylinders. It should be understood that in other embodiments, the pin 324 may also be disposed on the second semi-cylinder 322 , and the pin hole 325 may be correspondingly disposed on the first semi-cylinder 321 . Figure 3It is also shown that both the first semi-cylinder 321 and the second semi-cylinder 322 are provided with a plurality of arcuate ribs 326 arranged axially at intervals, and the arcuate ribs 326 are axially limited with the side wall of the handle body 3, thereby limiting the two semi-cylinders to be able to rotate only relative to the handle body 3. The edge of the arcuate rib 326 on the first semi-cylinder 321 is provided with a pin 324, and the edge of the arcuate rib 326 on the second semi-cylinder 322 is provided with a pin hole 325. Due to the thin wall thickness of the semi-cylinder, the provision of the arcuate rib 326 provides space for installing the pin 324 and the pin hole 325.

[0074] Specifically, refer to Figure 7 The inner wall of the first semi-cylinder 321 is provided with a third thread 3211 and a fourth thread 3221, and the inner wall of the second semi-cylinder 322 is provided with a third thread 3211 and a fourth thread 3221. The third thread 3211 of the first semi-cylinder 321 is connected with the third thread 3211 of the second semi-cylinder 322 to form a continuous first internal thread 343, and the fourth thread 3221 of the first semi-cylinder 321 is connected with the fourth thread 3221 of the second semi-cylinder 322 to form a continuous second internal thread 344. The first thread 3411 on the first traction block 341 is a first external thread, and the second thread 3421 on the second traction block 342 is a second external thread. The first external thread is screwed with the first internal thread 343, and the second external thread is screwed with the second internal thread 344.

[0075] refer to Figure 7 The bending adjustment component 6 has an axially extending composite thread segment 323, which is distributed on the first semi-cylinder 321 and the second semi-cylinder 322. The composite thread segment 323 is arranged with a third thread 3211 and a fourth thread 3221 arranged in a cross-arrangement, and the intersection of the third thread 3211 and the fourth thread 3221 can be understood here as the intersection of the first internal thread 343 and the second internal thread 344. The third thread 3211 and the fourth thread 3221 on the composite thread segment 323 both extend from the proximal end of the composite thread segment 323 to the distal end of the composite thread segment 323. In the composite thread segment 323, when the first external thread is screwed with the first internal thread 343, the second external thread is screwed with the second internal thread 344. Based on the structure of the above composite threaded segment 323, the axial dimension of the bending adjustment component 6 can be reduced to a certain extent, thereby reducing the axial dimension of the entire device and reducing consumables. On the premise that the axial dimension of the entire device is reduced, it can also ensure that the user can hold the handle body 3 with one hand and use the holding hand to rotate the distal bending adjustment component 6 or toggle the distal pulling button 7.

[0076] The traction unit 34 can be in an initial position, and the tube body 4 in the initial position can be in a straight state, that is, the tube body 4 is in an unbent state. Figure 7 , Figure 7The schematic diagram shows the state of the traction unit 34 in the initial position. In the initial position, the distal end of the first thread 3411 is located between the proximal end and the distal end of the compound thread segment 323, and the distal end of the second thread 3421 is located between the proximal end and the distal end of the compound thread segment 323. In this way, a movement space for the first thread 3411 to be relatively displaced along the axial direction after being threadedly connected with the third thread 3211 can be provided, and a movement space for the second thread 3421 to be relatively displaced along the axial direction after being threadedly connected with the fourth thread 3221 can be provided. At this time, the bending adjustment component 6 can drive the first traction block 341 and the second traction block 342 to move along the axial direction regardless of rotating forward or reversely along the circumferential direction. Furthermore, in the initial position, the first traction block 341 and the second traction block 342 are located between the proximal end and the distal end of the compound thread segment 323, that is, the proximal end and the distal end of the first traction block 341 are both located between the proximal end and the distal end of the compound thread segment 323, and the proximal end and the distal end of the second traction block 342 are both located between the proximal end and the distal end of the compound thread segment 323. Such a configuration can reduce the consumables for manufacturing the first traction block 341 and the second traction block 342 to achieve the purpose of saving material costs. And relying on the nature of the bending adjustment component 6 driving the first traction block 341 and the second traction block 342 to move through the threaded connection, the axial length of the first traction block 341 and the second traction block 342 does not need to be set too long.

[0077] It should be noted that the bending adjustment assembly 6 described above includes the first semi-cylinder 321 and the second semi-cylinder 322. In order to match the appearance of the first semi-cylinder 321 and the second semi-cylinder 322, the first traction block 341 and the second traction block 342 can also be set as a semi-cylinder structure. In the initial position, the first traction block 341 and the second traction block 342 are opposite to each other to form a cylindrical structure. Since the first traction block 341 and the second traction block 342 have the same structure, Figure 8 and Fig. 9 Only the structural diagram of the first traction block 341 is shown. Figure 8 and Fig. 9 The outer wall of the first traction block 341 is provided with a first thread 3411, and the first traction block 341 is provided with a through hole 3412 that passes through its proximal end and distal end. The through hole 3412 has an entry end 3413 located at the distal end and an exit end 3414 located at the proximal end. The entry end 3413 is used for the entry of the first traction line connected to the tube body 4 at the distal end, and the exit end 3414 is used for the exit of the first traction line. In this embodiment, the through hole 3412 used to fix the first traction line is set as a gradient through hole, that is, the entry end 3413 is set as a large-sized opening to ensure the convenience of assembling the first traction line, and the exit end 3414 is set as a small-sized opening so that the first traction line cannot pass through the structure after the steel sleeve is mechanically compressed, thereby ensuring the effectiveness of the first traction block 341 pulling the first traction line. The structure of the second traction block 342 is similar to that of the first traction block 341.

[0078] Since the bending adjustment assembly 6 is threadedly connected with the first traction block 341 and the second traction block 342 to drive the first traction block 341 and the second traction block 342 to move along the axial direction, the first traction block 341 and the second traction block 342 need to be located inside the handle body 3 at the upper limit of the circumference of the handle body 3. Figure 3 The ablation device 100 further includes a hollow support shaft 37, and the support shaft 37 is located inside the handle body 3 at the circumferential upper limit of the handle body 3, that is, the support shaft 37 cannot rotate relative to the handle body 3 along the circumferential direction. Specifically, a limiting groove 370 is provided at the proximal end of the support shaft 37, and the inner wall of the handle body 3 is embedded in the limiting groove 370 to limit the axial movement and circumferential rotation of the support shaft 37. In order to balance the force of the support shaft 37 in the handle body 3, the number of the limiting grooves 370 is two and they are located on opposite sides of the proximal end of the support shaft 370 in the radial direction, and the two limiting grooves 370 are respectively engaged with the inner walls of the two shells.

[0079] The bending adjustment component 6 is threadedly coupled with the first traction block 341 and the second traction block 342 to form a sleeve structure, which is sleeved on the outside of the support shaft 37. Specifically, Figure 3 The traction unit 34 formed by the first traction block 341 and the second traction block 342 is sleeved on the outside of the support shaft 37, and the bending adjustment assembly 6 formed by the first semi-cylinder 321 and the second semi-cylinder 322 is sleeved on the outside of the traction unit 34. Figure 8 and Fig. 9 The first traction block 341 and the second traction block 342 are both provided with a track groove 3415 extending axially along the handle body 3. Fig.10 and Fig.11 The support shaft 37 is provided with a slide rail 371 extending along the axial direction of the handle body 3. The first traction block 341 and the second traction block 342 are respectively slidably provided on the slide rail 371 along the axial direction of the handle body 3 through their respective track grooves 3415, so that the first traction block 341 and the second traction block 342 are also limited in the circumferential direction of the support shaft 37 through the cooperation between the slide rail 371 and the track groove 3415. It can be understood that the track groove 3415 can also be provided on the support shaft 37, and the slide rail 371 is provided on the first traction block 341 and the second traction block 342. Of course, the support shaft 37 may not be provided with the slide rail 371. Instead, the slide rail 371 can be provided on the inner wall of the handle body 3. In this case, the first traction block 341 and the second traction block 342 are respectively slidably provided on the slide rail 371 on the handle body 3.

[0080] It should be noted that the reference Fig.12The inner channel 372 of the support shaft 37 is used for the tube body 4 to pass through, so that the proximal end of the tube body 4 is fixed to the proximal end of the support shaft 37. The proximal end of the support shaft 37 is provided with a bonding position 373 connected to the inner channel 372. After the tube body 4 passes through the inner channel 372 of the support shaft 37, the proximal end of the tube body 4 can be bonded to the bonding position 373, thereby achieving relative fixation of the tube body 4 and the support shaft 37. Specifically, refer to Fig.10 The support shaft 34 is also provided with a glue injection groove 374 at the proximal end. In actual operation, glue can be poured into the glue injection groove 374 so that the glue flows into the bonding position 373 to fix the proximal end of the tube body 4 at the bonding position 373, ensuring that there is no airtightness risk on the outside of the tube body 4.

[0081] Secondly, combined Figure 3 and Fig.12 After the bonding step of the tube body 4 is completed, the three-way valve 38 provided on the handle body 3 is tightly bonded to the three-way inlet 375 provided on the support shaft 37, so as to ensure that the side wall of the support shaft 37 will not have the risk of airtightness through the three-way valve 38. At the same time, cold saline can also be perfused through the three-way valve 38 to reduce the risk of thrombosis during the ablation process and ensure the treatment effect. It should be noted that the three-way inlet 375 can be understood as a tube interface, which is only one form of the tube interface. The tube interface can also be selected from other types of interfaces. In addition, the tube interface and the glue injection groove 374 are arranged on the same outer wall surface of the proximal end of the support shaft 37, and the tube interface and the glue injection groove 374 are formed on the surface outside the limiting groove 370, and the tube interface and the glue injection groove 374 exist independently of the limiting groove 370. The purpose of doing this is that in order to facilitate the electrode wires of the conductive frame 312 and the reference electrode 41 on the connecting tube body 4 to be led out to the connector 8, the electrode wires do not need to be led out through the limiting groove 370. If the glue injection groove 374 is set in the limiting groove 370, it will interfere with the positioning of the shell, and the wires coming out of the glue injection groove 374 may be broken by the positioning of the shell.

[0082] Combination Figure 3 and Fig.12 The ablation device 100 further includes a sealing cover 391 and a sealing ring 392. The sealing cover 391 is a hollow structure with two ends opened. The sealing cover 391 holds and seals the sealing ring 392 against the proximal end of the support shaft 37. Figure 3 and Fig.12It is shown that the proximal end of the support shaft 37 is provided with a threaded hole 376, and the sealing cover 391 can be penetrated through the threaded hole 376 of the proximal end of the support shaft 37 and is threadedly connected with the proximal end of the support shaft 37. Through the threaded connection relationship between the sealing cover 391 and the support shaft 37, the sealing cover 391 can hold the sealing ring 392 between the sealing cover 391 and the support shaft 37. The sealing cover 391, the sealing ring 392 and the tube body 4 can be sequentially passed through by the inner sheath core 5. After the inner sheath core 5 passes through the sealing ring 392, the outer wall of the inner sheath core 5 and the inner wall of the sealing ring 392 are closely attached to each other, thereby ensuring that there is no airtight risk at the proximal end of the support shaft 37, and also ensuring that the inner sheath core 5 is maintained in a certain stretched position. In actual operation, the sealing ring 392 with a moderate interference fit can be cut once on each of the front and back sides in a cross shape with a blade, but the two cuts do not intersect, that is, the front and back sides of the sealing ring 392 are not connected, and then the sealing ring 392 is pressed against the support shaft 37 through the threaded structure of the sealing cover 391 cooperating with the support shaft 37, and then the inner sheath core 5 passes through the sealing ring 392 through the front and back cuts of the sealing ring 392, so that the penetrated part of the sealing ring 392 is minimized and fits tightly to the inner sheath core 5, ensuring that there is no airtightness risk at the rear end of the support shaft 37, the sealing cover 391, the sealing ring 392 and the inner sheath core 5 jointly ensure that the tube body 4 will not come into contact with the outside air, eliminating the risk of air leakage at the proximal end of the support shaft 37, and the overall structural design of the support shaft 37 reflects a high degree of functional integration. It should be understood that the sealing ring 392 can be understood as a sealing damping ring. The sealing ring 392 not only achieves sealing but also increases the stability of the inner sheath core 5 when it is moved to any position, so as to prevent the radially expanded support frame 21 from driving the inner sheath core 5 to move axially, resulting in the radially expanded support frame 21 being unstable and having the risk of radial retraction, especially during the operation, which will cause a greater surgical risk. In addition, the sealing ring 392 and the anti-skid pad 3112 mentioned above can both achieve the effect of maintaining the state of the radially expanded support frame 21 stable. In the specific implementation, the sealing ring 392 and the anti-skid pad 3112 can be set at will.

[0083] It should be explained that there are many structural ways to fix the sealing ring 392 to the proximal end of the support shaft 37. The above is only one possible embodiment in which the sealing cover 391 is threadedly connected to the proximal end of the support shaft 37 to resist the sealing ring 392. In other embodiments, the sealing ring 392 can also be fixed to the proximal end of the support shaft 37 by clamping, or the sealing ring 392 is glued to the proximal end of the support shaft 37.

[0084] In order to enable the user to conveniently use the hand holding the proximal end of the handle body 3 to operate the bending assembly 6, refer to Figure 3The bending adjustment component 6 of the present application also includes a rotating wheel 61 and a linkage block 62. The linkage block 62 is connected to the rotating wheel 61 and can rotate synchronously with the rotating wheel 61. The linkage block 62 is circumferentially limited with the first semi-cylinder 341 and the second semi-cylinder 342. Specifically, the linkage block 62 includes a plurality of plug blocks 621 arranged at intervals in the circumference of the first semi-cylinder 341 and the second semi-cylinder 342. The plug block 621 is inserted into the gap between two adjacent plug bars 622. The plug block 621 will undergo radial elastic deformation while being inserted between two adjacent plug bars 622. When the plug block 621 is completely inserted between two adjacent plug bars 622, the pre-tightening of the two is achieved by elasticity. It should be understood that in other embodiments, the plug block 621 may not undergo elastic deformation when inserted into the gap between two adjacent plug bars 622, and only the plug block 621 and the plug bar 622 may be blocked along the circumference. The rotating wheel 61 extends out of the handle body 3 and can drive the linkage block 62 to rotate relative to the handle body 3 , so as to drive the first semi-cylinder 341 and the second semi-cylinder 342 to rotate.

[0085] The linkage block 62 is also sleeved with a rubber ring 63, which is held between the linkage block 62 and the handle body 3. The rotary wheel 61 is exposed on the handle body 3 and can drive the linkage block 62 to rotate relative to the handle body 3, so as to drive the first semi-cylinder 321 and the second semi-cylinder 322 to rotate circumferentially relative to the handle body 3. Based on the setting of the rubber ring 63, the rotary wheel 61 can be stably maintained at a certain rotation angle in the circumferential direction, so as to prevent the rotary wheel 61 from being accidentally touched or rotating due to other unexpected situations, resulting in a bending error at the distal end of the tube body 4. In addition, the first traction block 341 and the second traction block 342 can adopt a large pitch structure design, so that the rotary wheel 61 can achieve the bending of the distal end of the tube body 4 at a smaller rotation angle, and the operation is more convenient. However, the large pitch structure design will cause the tube body 4 to have a greater rebound tendency after bending, and it will be unable to maintain the shape after bending. Therefore, in order to ensure that the tube body 4 can be self-locking after bending, the rubber ring 63 of this embodiment increases the friction between the rotating wheel 61 and the handle body 3, thereby ensuring the self-locking property of the tube body 4 after bending.

[0086] In order to avoid the imbalance of weight between the proximal and distal ends of the handle body 3 caused by the rotating wheel 61 being a whole part, and the shrinkage defect caused by excessive mold wall thickness, an embodiment of the present application can also split the rotating wheel 61 for lightweighting. Specifically, the center of the rotating wheel 61 is hollowed out to reduce the overall weight of the rotating wheel 61. On this basis, the rotating wheel 61 is designed to be threadedly spliced ​​by a columnar rotating portion 611 and a conical threaded portion 612. Most of the material is also removed from the conical threaded portion 612 to reduce its weight. Among them, the outer surface of the rotating portion 611 is provided with a concave-convex structure to facilitate manual operation and rotation. The radial size of the distal end of the threaded portion 612 gradually decreases, and the distal end of the threaded portion 612 radially converges the tube body 4 and radially constrains the tube body 4.

[0087] Second embodiment

[0088] refer to Figures 13 to 15 ,in, Fig.13 Schematic diagram of the structure of the ablation device 100 is shown. Fig.14 The schematic diagram of the structure of the pulling component is shown. Fig.15 A schematic cross-sectional structure diagram of the pulling component is shown.

[0089] The structure of the ablation device 100 of this embodiment is basically the same as that of the first embodiment, except that the diameter adjustment structure of the ablation component 2 is different. In this embodiment, the pulling component 9 replaces the pulling button 7 and the pulling rod 71 in the first embodiment. The pulling component 9 includes an axially connected pulling slider 91 and a pulling rod 92. The pulling slider 91 is movably arranged in the handle body 3 along the axial direction of the handle body 3. The proximal end of the inner sheath core 5 is connected to the pulling slider 91, and the pulling rod 92 can drive the pulling slider 91 to reciprocate along the axial direction, so that the inner sheath core 5 moves axially relative to the tube body 4. Fig.14 and Fig.15 The traction slider 91 is provided with an axially extending sheath core through hole 911, and the inner sheath core 5 is passed through and fixed in the sheath core through hole 911. The inner sheath core 5 can be fixed in the sheath core through hole 911 by glue. For example, Fig.14 and Fig.15 It is shown that the traction slider 91 is also provided with a slide groove 912 for constraining its circumferential movement. The slide groove 912 can cooperate with the guide rail provided inside the handle body 3. The groove surface of the slide groove 912 is provided with a glue injection hole 913 connected to the sheath core through hole 911. In actual operation, the user can directly inject glue from the glue injection hole 913 to fix the inner sheath core 5. It should be noted that in the process of fixing the inner sheath core 5, in order to facilitate the adjustment of the initial shape of the support skeleton 21, the traction rod 92 is located at the proximal end of the traction slider 91 and the traction rod 92 is hollow inside to form an installation cavity 921. The installation cavity 921 is axially connected with the sheath core through hole 911. The installation cavity 921 provides space for the inner sheath core 5 to extend axially. In this way, when selecting the inner sheath core 5, a sufficiently long inner sheath core 5 can be provided to avoid the problem that the inner sheath core 5 cannot be installed due to insufficient length of the inner sheath core 5. At this time, in order to fix the inner sheath core 5, the inner sheath core 5 can be inserted into the sheath core through hole 911 and reach the position of the installation cavity 921, first adjust the initial shape of the support frame 21, and then inject glue from the glue injection hole 913 to fix the inner sheath core 5.

[0090] Continue to refer Fig.14 and Fig.15The traction slider 91 is also provided with an axially extending wire through hole 914, which extends from the distal end of the traction slider 91 to the proximal end of the traction slider 91 and communicates with the mounting cavity 921 of the traction rod 92. The wire through hole 914 is used for the electrode wire (not shown) to pass through, and the radial dimension of the wire through hole 914 should be set to be larger than the radial dimension of the electrode wire to avoid the electrode wire from being subjected to greater wear when passing through the wire through hole 914. Among them, the distal end of the electrode wire is connected to the conductive frame 211 and the reference electrode 41 provided on the tube body 4, and the proximal end of the electrode wire passes through the wire through hole 914 and connects to the connector 8 ( Fig.13 ) connection. The wire through hole 914 and the sheath core through hole 911 are independent of each other, so that the electrode wire and the inner sheath core 5 do not affect each other, avoiding the risk of the traction slider 91 pulling the electrode wire at the same time when pulling the inner sheath core 5. It should be noted that in this embodiment, the connector 8 is arranged at the proximal end of the handle body 3. Specifically, the distal end of the connector 8 is connected to the proximal end of the wire tube 81, and the distal end of the wire tube 81 is sleeved in the mounting cavity 921 of the traction rod 92, so that the proximal end of the electrode wire is connected to the connector 8 through the wire tube 81, thereby realizing the electrical connection between the connector 8 and the conductive frame 211 and the reference electrode 41 provided on the tube body 4. It can be understood that in other examples, considering the integrity of the structure, the connector 8 can be directly fixedly connected to the proximal end of the handle body 3 instead of being connected to the handle body 3 through the wire tube 81.

[0091] Third embodiment

[0092] refer to Fig.16 and Fig.17 ,in, Fig.16 The schematic diagram of the structure of the ablation device 100 is shown. Fig.17 The schematic diagram of the structure of the pulling component 9 of the ablation device 100 is shown.

[0093] The ablation device 100 of this embodiment is similar in structure to that of the second embodiment, except that the structure of the pulling assembly 9 is different. Specifically, in this embodiment, the traction rod 92 is provided with a limit block 922, and the limit block 922 is located at the proximal end of the traction slider 91. The traction slider 91 can move toward the proximal end of the handle body 3 to abut against the handle body 3, and the traction slider 91 can move toward the distal end of the handle body 3 to make the limit block 922 abut against the handle body 3. It should be noted that the abutment of the limit block 922 with the handle body 3 limits the maximum distance of the traction slider 91 moving axially toward the distal end, and the abutment of the traction slider 91 with the handle body 3 limits the maximum distance of the traction slider 91 moving axially toward the proximal end.

[0094] In the first embodiment, in order to ensure the self-locking property of the position after pulling the inner sheath core 5, the first embodiment adopts the threaded connection between the traction knob 93 and the traction rod 92, that is, the traction knob 93 and the traction rod 92 small pitch thread match the mode of pulling the inner sheath core 5. In the present embodiment, by increasing the thickness of the sealing ring 392 and the interference between the sealing ring 392 and the support shaft 37, and also by increasing the roughness of the outer surface of the inner sheath core 5, and changing the cutting process of the sealing ring 392 from not cutting through the front and back cross cutting to drilling. Therefore, the self-locking property after pulling the inner sheath core 5 by the traction slider 91 in the present embodiment depends on the two aspects after the change, on the one hand, due to the increase in the thickness of the sealing ring 392, the contact area between the inner sheath core 5 and the sealing ring 392 increases, and the drilling process makes the inner sheath core 5 smaller and the gap between the inner sheath core 5 and the sealing ring 392 after passing through the sealing ring 392, and the fit is tighter. On the other hand, the roughness of the outer surface of the inner sheath core 5 after grinding increases the friction between the inner sheath core 5 and the sealing ring 392, resulting in the need for external force whether pulling the inner sheath core 5 or pushing the inner sheath core 5. The rebound of the support skeleton 21 alone cannot cause relative movement between the inner sheath core 5 and the sealing ring 392.

[0095] When assembling the ablation device 100, first remove the inner sheath core 5 passing through the sealing ring 392 from the Fig.17 Insert the electrode wire from the sheath core through hole 911 as shown in the figure, and at the same time insert the electrode wire from Fig.17The wire through hole 914 shown is inserted, and then the support skeleton 21 is adjusted to the state of the retractable catheter (i.e., radial contraction state) to facilitate determining the position where the inner sheath core 5 is bonded to the traction slider 91. After completing the above steps, the limit block 922 is moved toward the distal end to abut against the handle body 3. At this time, the traction slider 91 moves toward the distal end to the limit position, and the traction slider 91 is in the initial state. Then the inner sheath core 5 is bonded to the traction slider 91 by gluing, that is, the relative fixation of the inner sheath core 5 and the traction slider 91 is achieved. Therefore, in actual operation, when the user holds the proximal end of the traction rod 92 and pulls the traction slider 91 axially, the traction slider 91 can be pushed back to the proximal limit position to abut against the handle body 3. At this time, the support skeleton 21 is pulled by the inner sheath core 5 and the axial size gradually decreases, and the radial size gradually increases, and the support skeleton 21 completes radial expansion. In the process of the traction slider 91 moving axially toward the proximal end, the inner sheath core 5 can be selectively pulled to a certain intermediate position according to the patient's pathological characteristics so that the support skeleton 21 can reach the optimal expansion shape. Among them, the limit distance of the traction slider 91 moving axially toward the proximal end limits the maximum radial expansion size of the support skeleton 21, thereby ensuring that the support skeleton 21 will not be over-stretched and cause failure. When the sheath needs to be retracted, that is, when the support skeleton 21 needs to be adjusted from a radially expanded state to a radially contracted state, the traction rod 92 can be operated to push the traction slider 91 axially toward the distal end to the limit position. It can be seen that the improved structure of the traction component 9 and the sealing module in this embodiment performs better in terms of the timeliness of pulling the inner sheath core 5.

[0096] Fourth embodiment

[0097] refer to Fig.18 ,in, Fig.18 The diagram shows the coordination structure of the bending adjustment assembly 6 and the traction unit 34 .

[0098] The ablation device 100 of this embodiment is basically similar in structure to the above-mentioned embodiments, except that the bending adjustment component 6 and the traction unit 34 have different detailed structures. Specifically, in this embodiment, the bending adjustment component 6 includes a rotary cylinder 64 and a rotary shaft 65. The rotary cylinder 64 is sleeved on the outer side of the rotary shaft 65, and the rotary cylinder 64 and the rotary shaft 65 can rotate synchronously along the circumferential direction. Specifically, Fig.18The diagram shows that the rotary drum 64 is a hollow structure with two ends open, and an end cap 651 is provided at the end of the rotary shaft 65. The rotary shaft 65 is inserted into the rotary drum 64 and the end cap 651 abuts against one end of the rotary wheel 66 facing the traction unit 34. The bending adjustment assembly 6 also includes a threaded connector (not shown in the figure), which is inserted into the end cap 651 and the rotary wheel 66 (described below) to achieve a detachable connection between the rotary wheel 66 and the rotary shaft 65. It should be understood that in other embodiments, the end cap of the rotary shaft 65 may not be provided, that is, the end cap at the end of the rotary shaft 65 is not a necessary component, and the rotary wheel 66 and the rotary shaft 65 may also be connected in other detachable ways such as snap-on, bonding, etc. In addition, when the mold cost is not considered, the rotary drum 64 and the rotary shaft 65 may also be integrally formed. Since the rotary drum 64 and the rotary shaft 65 are fixedly connected together, the rotary drum 64 and the rotary shaft 65 can rotate synchronously. Of course, in order to realize the synchronous rotation of the rotary cylinder 64 and the rotary shaft 65, the rotary cylinder 64 and the rotary shaft 65 can also adopt the structure of sliders and slide rails to realize the circumferential limitation of the two, so as to realize the synchronous circumferential rotation of the two.

[0099] For ease of understanding, define Fig.18 The side of the rotating shaft 65 provided with the end cap 651 is the distal end, and the side of the rotating shaft 65 away from the end cap 651 is the proximal end. In this case, the bending adjustment component 6 is located at the distal end of the handle body 3 as a whole, and the user can operate the bending adjustment component 6 at the distal end. Of course, the end cap 651 can also be provided at the proximal end, in which case the bending adjustment component 6 is located at the proximal end of the handle body 3 as a whole, and the user can operate the bending adjustment component 6 at the proximal end.

[0100] An axially extending installation gap is formed between the inner wall of the rotary cylinder 64 and the outer wall of the rotary shaft 65, and the installation gap is installed with the first traction block 341 and the second traction block 342 described above. In this embodiment, the first thread 3411 on the first traction block 341 is a first external thread, the second thread 3421 on the second traction block 342 is a first internal thread, the inner wall of the rotary cylinder 64 is provided with a third thread 3421, the third thread 3421 is a second internal thread, and the second internal thread is screwed with the first external thread, and the outer wall of the rotary shaft 65 is provided with a fourth thread 3221, the fourth thread 3221 is a second external thread, and the second external thread is screwed with the first internal thread.

[0101] Compared with the previous embodiment, the present embodiment completely integrates the rotary cylinder 64 and the rotary shaft 65, avoiding the risk of the above-mentioned thread structures failing due to the gap error caused by continuing to glue and bond after the first semi-cylinder 321 and the second semi-cylinder 322 are buckled, resulting in the inability to bend the tube body 4. At the same time, the first traction block 341 and the second traction block 342 of the present embodiment can be directly constrained on the handle body 3, and can further reduce the gap error caused by indirectly constraining its degree of freedom through the support shaft 37.

[0102] In one embodiment, the first traction block 341 includes a first thread segment 3416 and a first limiting segment 3417 connected in the axial direction, the first thread segment 3416 is provided with a first external thread (first thread 3411), the radial dimension of the first limiting segment 3417 is larger than the inner cavity dimension of the rotary cylinder 64, and the first thread segment 3416 can be driven by the rotary cylinder 64 to move axially in the rotary cylinder 64, so that the first limiting segment 3417 abuts against the end of the rotary cylinder 64. Fig.18 It is shown that the first thread segment 3416 can move axially to the distal end under the drive of the rotary cylinder 64. When the first thread segment 3416 moves toward the distal end, the second traction block 342 moves toward the proximal end, and the second traction block 342 drives the adjustable bending section of the tube body 4 to bend toward the second side. It should be noted that when the first thread segment 3416 moves toward the distal end to a certain extent, the first limit segment 3417 abuts against the proximal end of the rotary cylinder 64. At this time, the first thread segment 3416 is restricted from continuing to move toward the distal end, and the movement of the second traction block 342 toward the proximal end is also restricted, that is, the bending of the tube body 4 toward the second side reaches the limit.

[0103] Similarly, the second traction block 342 may also include a second thread segment 3426 and a second stop segment 3427 connected in the axial direction, the second thread segment 3426 is provided with a first internal thread (second thread 3421), the radial dimension of the second stop segment 3427 is larger than the inner cavity dimension of the rotary cylinder 64, and the second thread segment 3426 can be driven by the rotary shaft 65 to move axially in the rotary cylinder 64, so that the second stop segment 3427 abuts against the end of the rotary cylinder 64. Fig.18 It is shown that the second thread segment 3426 can move axially to the distal end under the drive of the rotating shaft 65. When the second thread segment 3426 moves toward the distal end, the first traction block 341 will move toward the proximal end, and the first traction block 341 will drive the adjustable bending section of the tube body 4 to bend toward the first side. It should be noted that when the second thread segment 3426 moves toward the distal end to a certain extent, the second limiting segment 3427 will abut against the proximal end of the rotating cylinder 64. At this time, the second thread segment 3426 is restricted from continuing to move toward the distal end, and the movement of the first traction block 341 toward the proximal end is also restricted, that is, the bending of the tube body 4 toward the first side reaches the limit.

[0104] Therefore, the first limiting section 3417 and the second limiting section 3427 can work together to limit the limit angle of the adjustable bending section of the tube body 4 bending toward the first side and the limit angle of the tube body 4 bending toward the second side. In specific implementation applications, the limit angle of the adjustable bending section of the tube body 4 bending toward the first side and the limit angle of the adjustable bending section of the tube body 4 bending toward the second side can be set to be equal or unequal. For example, Fig.18It shows that the limit angle of the adjustable bend of the tube body 4 toward the first side is equal to the limit angle of the adjustable bend of the tube body 4 toward the second side. Specifically, in this embodiment, an initial position is first defined, and the traction unit 34 can be moved axially to the initial external position. At the initial position, the first traction block 341 and the second traction block 342 can continue to move axially in opposite directions. The pitch and helix angle of the first external thread (first thread 3411) and the first internal thread (second thread 3421) are equal. The end face of the first limiting section 3417 facing the first thread section 3416 is defined as the first limiting surface, and the end face of the second limiting section 3427 facing the second thread section 3426 is defined as the second limiting surface. At the initial position, the second limiting surface is flush with the first limiting surface, and the distance from the second limiting surface to the proximal end of the rotary cylinder 64 is equal to the distance from the first limiting surface to the proximal end of the rotary cylinder 64. Based on the above settings, the maximum moving distance of the first traction block 341 and the second traction block 342 toward the proximal end is equal. When it is necessary to set the bending angles of the tube body 4 on both sides to be different, the pitch and helix angle of the thread can be changed.

[0105] It should be noted that in other embodiments, the first limiting section 3417 and the second limiting section 3427 may not be provided at the same time. For example, in one embodiment, one of the first traction block 341 and the second traction block 342 is provided with a limiting section, and the other can move toward the side where the end cover 651 is located and abut against the end cover 651. For ease of understanding, the above embodiments can be summarized into the following two implementations. In the first case, the proximal end of the first traction block 341 is provided with the first limiting section 3417, while the proximal end of the second traction block 342 is not provided with the second limiting section 3427, and the distal end of the second traction block 342 can abut against the end cover 651. In this case, when the first limiting section 3417 abuts against the proximal end of the rotary cylinder 64, the second traction block 342 moves toward the proximal end to the limit position and drives the tube body 4 to bend toward the second side to the limit angle, and when the distal end of the second traction block 342 abuts against the end cap 651, the first traction block 341 moves toward the proximal end to the limit position and drives the tube body 4 to bend toward the first side to the limit angle. In the second case, the proximal end of the second traction block 342 is provided with the second limiting section 3427 while the proximal end of the first traction block 341 is not provided with the first limiting section 3417, and the distal end of the first traction block 341 can abut against the end cap 651. In this case, when the second limiting section 3427 abuts against the proximal end of the rotary cylinder 64, the first traction block 341 moves toward the proximal end to the extreme position and drives the tube body 4 to bend toward the first side to the extreme angle. When the distal end of the first traction block 341 abuts against the end cover 651, the second traction block 342 moves toward the proximal end to the extreme distance and drives the tube body 4 to bend toward the second side to the extreme angle.

[0106] In one embodiment, reference Fig.18The first limiting section 3417 is provided with an axially extending first rib 3418, which is engaged with the handle body 3 to achieve circumferential limiting of the first traction block 341 and the handle body 3. The second limiting section 3427 is provided with an axially extending second rib 3428, which is engaged with the handle body 3 to achieve circumferential limiting of the second traction block 342 and the handle body 3. Fig.18 It is shown that the number of the first convex rib 3418 and the number of the second convex rib 3428 are both two, and the two convex ribs in the same limiting section can be respectively embedded in the detachable first shell 331 and the second shell 332.

[0107] In one embodiment, the first limiting section 3417 is provided with an axially extending first threading hole 3419, which is used for embedding and installing the first pulling wire, and the first pulling wire is used to connect with the first side of the adjustable bending section of the tube body 4. The second limiting section 3427 is provided with an axially extending second threading hole 3429, which is used for embedding and installing the second pulling wire, and the second pulling wire is used to connect with the second side of the adjustable bending section of the tube body 4. The first threading hole 3419 and the second threading hole 3429 are designed to maintain a gradual change of the large aperture at the distal end and the small aperture at the proximal end, ensuring that the bending wire cannot pass through the small aperture through hole at the proximal end after passing through the two limiting sections and being mechanically compressed by the steel sleeve, thereby achieving the purpose of the traction block pulling the bending wire.

[0108] In one embodiment, the end of the rotary drum 64 is provided with a plurality of inserts 641 arranged at intervals along the circumference, and the bending adjustment assembly further includes a rotary wheel 66, and the rotary wheel 66 is provided with a linkage block 661, and the linkage block 661 includes a plurality of inserts 662 arranged at intervals along the circumference, and the inserts 662 are detachably inserted into or separated from the circumferential gap between two adjacent inserts 641. The inserts 662 undergo radial elastic deformation and accumulate elastic force during the insertion of two adjacent inserts 641. When the inserts 662 are inserted between two adjacent inserts 641, the inserts 662 are pre-tightened by the pre-tightening force after the elastic deformation, thereby ensuring that the rotary wheel 66 will not easily detach from the rotary drum 64. At the same time, the synchronous rotation of the inserts 662 and the inserts 641 is also achieved, that is, the synchronous rotation of the rotary wheel 66 and the rotary drum 64 is achieved.

[0109] Although the present application has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present application can be implemented in a variety of forms without departing from the spirit or essence of the application, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A bending handle, used to control the bending of a tube installed at its distal end, characterized in that: The bending adjustment handle includes a handle body, a traction unit and a bending adjustment assembly. The traction unit includes a traction block connected to the distal end of the tube body. The traction block is movably arranged in the handle body along the axial direction of the handle body to drive the distal end of the tube body to bend. The bending adjustment assembly is connected to the traction block and can rotate circumferentially relative to the handle body to drive the traction block to move axially.

2. The bending handle according to claim 1, characterized in that: The traction unit includes a first traction block and a second traction block, the first traction block and the second traction block are both limited in the handle body in the circumferential direction of the handle body, and the first traction block and the second traction block can also reciprocate along the axial direction of the handle body, and the direction in which the first traction block drives the tube body to bend when moving toward the proximal end is different from the direction in which the second traction block drives the tube body to bend when moving toward the proximal end; the first traction block is provided with a first thread, and the second traction block is provided with a second thread, and the spiral directions of the first thread and the second thread are opposite, and the bending adjustment component is also provided with a third thread and a fourth thread, and the spiral directions of the third thread and the fourth thread are opposite; the third thread is screwed with the first thread, and the fourth thread is screwed with the second thread.

3. The bending handle according to claim 2, characterized in that: The first thread of the first traction block is a first external thread, and the second thread of the second traction block is a second external thread; the bending adjustment assembly includes a first semi-cylinder and a second semi-cylinder that are detachably connected, the inner wall of the first semi-cylinder is provided with the third thread and the fourth thread, and the inner wall of the second semi-cylinder is provided with the third thread and the fourth thread; the third thread of the first semi-cylinder is connected with the third thread of the second semi-cylinder to form a continuous first internal thread, and the fourth thread of the first semi-cylinder is connected with the fourth thread of the second semi-cylinder to form a continuous second internal thread; the first internal thread is screwed together with the first external thread, and the second internal thread is screwed together with the second external thread.

4. The bending handle according to claim 3, characterized in that: One of the first semi-cylinder and the second semi-cylinder is provided with a pin, and the other is provided with a pin hole, and the pin is inserted into the pin hole to achieve a snap-fit ​​connection between the first semi-cylinder and the second semi-cylinder.

5. The bending handle according to claim 4, characterized in that: The end faces of the first semi-cylinder and the second semi-cylinder that are interlocked are the joining ends, and the fitting clearance between the pin and the pin hole on the radial side away from the joining end is larger than the fitting clearance between the pin and the pin hole on the radial side close to the joining end; the opening of the pin hole on the radial side away from the joining end is used for filling with glue to achieve a tight fit of the pin in the pin hole.

6. The bending handle according to claim 4, characterized in that: The first semi-cylinder and the second semi-cylinder are both provided with a plurality of arcuate ribs arranged axially at intervals, the edge of the arcuate rib on the first semi-cylinder is provided with the pin column, and the edge of the arcuate rib on the second semi-cylinder is provided with the pin hole.

7. The bending handle according to claim 3, characterized in that: The bending adjustment assembly also includes a rotating wheel and a linkage block, the linkage block is connected to the rotating wheel and can rotate synchronously with the rotating wheel, the linkage block is circumferentially limited with the first semi-cylinder and the second semi-cylinder at the same time, the linkage block is also sleeved with a rubber ring, and the rubber ring is held between the linkage block and the handle body, the rotating wheel extends out of the handle body and can drive the linkage block to rotate relative to the handle body, so as to drive the first semi-cylinder and the second semi-cylinder to rotate.

8. The bending handle according to claim 3, characterized in that: The first semi-cylinder and the second semi-cylinder are both provided with a plurality of inserts at intervals in the circumference thereof. The bending adjustment assembly further comprises a rotating wheel and a linkage block. The linkage block is connected to the rotating wheel and can rotate synchronously with the rotating wheel. The linkage block comprises a plurality of inserts at intervals in the circumference thereof. The inserts can be detachably inserted into or detached from the circumferential gap between two adjacent inserts.

9. The bending handle according to claim 7 or 8, characterized in that: The rotating wheel is a hollow structure, and includes a columnar rotating part and a conical threaded part. The rotating part is arranged between the linkage block and the threaded part, and the threaded part is threadedly engaged with the rotating part; the distal end of the threaded part is radially converged, and the distal end of the threaded part is used to radially constrain the tube body.

10. The bending handle according to claim 3, characterized in that: The bending adjustment handle also includes a hollow support shaft, which is located inside the handle body at the circumferential upper limit of the handle body, and the internal channel of the support shaft is for the tube body to pass through, so that the proximal end of the tube body is fixed to the proximal end of the support shaft; the first traction block and the second traction block are sleeved on the outside of the support shaft, and the first traction block and the second traction block are both circumferentially limited to the support shaft; a limiting groove is provided at the proximal end of the support shaft, and the inner wall of the handle body is embedded in the limiting groove to limit the axial movement and circumferential rotation of the support shaft; the proximal end of the support shaft is also provided with a glue injection groove on the surface outside the limiting groove, and the glue injection groove is connected to the internal channel of the support shaft.

11. The bending handle according to claim 2, characterized in that: The first thread of the first traction block is a first external thread, and the second thread of the second traction block is a first internal thread; the bending adjustment assembly includes a rotary cylinder and a rotary shaft, the rotary cylinder is sleeved on the outside of the rotary shaft, the rotary cylinder and the rotary shaft can rotate synchronously along the circumferential direction, and an axially extending installation gap is formed between the inner wall of the rotary cylinder and the outer wall of the rotary shaft, and the first traction block and the second traction block are installed in the installation gap; the inner wall of the rotary cylinder is provided with the third thread, and the outer wall of the rotary shaft is provided with the fourth thread, the third thread is a second internal thread, and the fourth thread is a second external thread, the second internal thread is screwed together with the first external thread, and the second external thread is screwed together with the first internal thread.

12. The bending handle according to claim 11, characterized in that: The first traction block includes a first threaded section and a first limiting section connected in an axial direction, the first threaded section is provided with the first external thread, the radial size of the first limiting section is larger than the inner cavity size of the rotor, and the first threaded section can be moved axially in the rotor under the drive of the rotor so that the first limiting section abuts against the end of the rotor; the second traction block includes a second threaded section and a second limiting section connected in an axial direction, the second threaded section is provided with the first internal thread, the radial size of the second limiting section is larger than the inner cavity size of the rotor, and the second threaded section can be moved axially in the rotor under the drive of the rotary shaft so that the second limiting section abuts against the end of the rotor.

13. The bending handle according to claim 12, characterized in that: The traction unit can be moved axially to an initial external position. In the initial position, the first traction block and the second traction block can continue to move axially in opposite directions; the pitch and the helix angle of the first external thread and the first internal thread are equal, the end face of the first limiting section facing the first thread segment is the first limiting face, and the end face of the second limiting section facing the second thread segment is the second limiting face. In the initial position, the distance from the second limiting face to the end of the rotor is equal to that of the first limiting face.

14. The bending handle according to claim 12, characterized in that: The first limiting section is provided with a first convex rib extending axially, and the first convex rib is embedded in the handle body to achieve circumferential limitation of the first traction block and the handle body; the second limiting section is provided with a second convex rib extending axially, and the second convex rib is embedded in the handle body to achieve circumferential limitation of the second traction block and the handle body.

15. The bending handle according to claim 12, characterized in that: The first limiting section is provided with a first threading hole extending axially, and the second limiting section is provided with a second threading hole extending axially.

16. The bending handle according to claim 11, characterized in that: The end of the rotary cylinder is provided with a plurality of inserts arranged at intervals along the circumferential direction. The bending adjustment assembly also includes a rotary wheel and a linkage block. The linkage block is connected to the rotary wheel and can rotate synchronously with the rotary wheel. The linkage block includes a plurality of inserts arranged at intervals along the circumference. The inserts can be detachably inserted into or detached from the circumferential gap between two adjacent inserts.

17. The bending handle according to claim 16, characterized in that: The rotary cylinder is a hollow structure with openings at both ends. An end cap is provided at the end of the rotary shaft. The rotary shaft passes through the rotary cylinder and the end cap abuts against one end of the rotary wheel facing the traction unit. The bending adjustment handle includes a threaded connector, which passes through the end cap and the rotary wheel to achieve a detachable connection between the rotary wheel and the rotary shaft.

18. The bending handle according to claim 17, characterized in that: One of the first traction block and the second traction block is provided with a limiting segment, and the other can abut against the end cover; the limiting segment is located on the side of the traction unit facing away from the rotating wheel, and the radial dimension of the limiting segment is larger than the inner cavity dimension of the rotating drum; the limiting segment can abut against the end of the rotating drum facing the traction unit to limit the first traction block connected to the limiting segment or the second traction block connected to the limiting segment from continuing to move axially toward the end cover.

19. An adjustable curved conduit, characterized in that: include: The bending handle according to any one of claims 1 to 18; A tube body, the proximal end of which is connected to the handle body, and the distal end of the tube body is provided with an adjustable bend section; The number of the traction lines corresponds to the number of the traction blocks, and the proximal ends of the traction lines are connected to the traction blocks, and the distal ends of the traction lines are connected to the adjustable bending sections.

20. An ablation device, characterized in that: include: The adjustable curved conduit as claimed in claim 19; as well as The ablation component is arranged at the distal end of the tube body and is used for ablating and isolating the target tissue area.

21. The ablation device according to claim 20, characterized in that: The ablation device also includes an inner sheath core and a pulling button, the distal end of the inner sheath core is connected to the ablation component, the inner sheath core is movably arranged in the tube body so as to be able to move axially relative to the tube body, thereby controlling the radial expansion or contraction of the ablation component, and the pulling button is connected to the inner sheath core and controls the axial movement of the inner sheath core; the pulling button extends out of the outer wall of the handle body and is arranged close to the part of the bending adjustment component extending out of the outer wall of the handle body, the part of the bending adjustment component extending out of the outer wall of the handle body and the pulling button are both arranged at the distal end of the handle body; a gripping area is provided at the proximal end of the handle body, and when gripping the gripping area, the gripping hand can also manipulate the part of the bending adjustment component extending out of the outer wall of the handle body and the pulling button.

22. The ablation device according to claim 21, characterized in that: The portion of the bending adjustment component extending from the outer side wall of the handle body is arranged axially spaced from the pulling button, and the portion of the bending adjustment component extending from the outer side wall of the handle body is located at the distal end of the pulling button.

23. The ablation device according to claim 21, characterized in that: The ablation device also includes a pulling rod arranged in the handle body, the pulling rod includes a rod body, a connecting shaft and a sliding member, the connecting shaft and the sliding member are respectively arranged at opposite ends of the rod body in the axial direction, and the connecting shaft and the sliding member are also respectively located on opposite sides of the rod body in the radial direction, at least part of the traction block in the axial active area is arranged side by side with at least part of the rod body in the radial direction; the pulling button is connected to the connecting shaft and can move back and forth in the axial direction, and the sliding member is connected to the proximal end of the inner sheath core.

24. The ablation device according to claim 23, characterized in that: One of the pulling button and the connecting shaft is provided with a bonding groove, and a part of the structure of the other is embedded in and bonded to the bonding groove.

25. The ablation device according to claim 23, characterized in that: The handle body is provided with an axially extending movable hole, and the pulling button is axially movably arranged in the movable hole; the outer surface of the pulling button includes a first slope surface and a second slope surface protruding from the movable hole, and the first slope surface and the second slope surface are arranged axially and intersect at the inner side of the pulling button to form a wave crest.

26. The ablation device according to claim 23, characterized in that The handle body is provided with a first slide rail and a second slide rail extending axially, the sliding member is restricted to be axially slidably connected to the first slide rail, and the distal end of the rod body is restricted to be axially slidably connected to the second slide rail.

27. The ablation device according to claim 26, characterized in that: The first slide rail is provided with a fixing groove, and the ablation device also includes an anti-slip pad, which is embedded in the fixing groove and part of the structure of the anti-slip pad protrudes from the fixing groove. The sliding part is provided with an axially extending slide rail groove, which is slidably matched with the first slide rail, and the anti-slip pad is supported against the sliding part.

28. The ablation device according to claim 27, characterized in that: The handle body includes a first shell and a second shell, and the first shell and the second shell are detachably snap-fitted and connected to form a accommodating cavity, and the accommodating cavity is used to install the rod body and the sliding member; the number of the first slide rails is two, and the two first slide rails are respectively arranged on the first shell and the second shell and are opposite to each other; the number of the slide rail grooves is two, and the two slide rail grooves are located on opposite sides of the sliding member along the radial direction; the two sides of the sliding member along the radial direction are respectively slidably matched with the two first slide rails through the corresponding anti-slip pads.

29. The ablation device according to claim 27, characterized in that The sliding part is provided with a functional hole, a sheath core through hole and a glue injection hole. The functional hole and the sheath core through hole extend axially and are arranged side by side. The glue injection hole is connected to the sheath core through hole, and the glue injection hole is arranged adjacent to the slide rail groove.

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