WO2023241630A1

WO2023241630A1 - Bending handle, adjustable bending catheter and ablation apparatus

Info

Publication number: WO2023241630A1
Application number: PCT/CN2023/100252
Authority: WO
Inventors: 陈鹏; 刘成
Original assignee: 杭州德诺电生理医疗科技有限公司
Priority date: 2022-06-15
Filing date: 2023-06-14
Publication date: 2023-12-21
Also published as: CN114748159B; CN114748159A

Abstract

Provided are a bending handle (3), an adjustable bending catheter (1) and an ablation apparatus (100). The bending handle (3) is used for controlling the bending of a pipe body (4) mounted at the distal end thereof. The bending handle (3) comprises a handle assembly (31) and a driving assembly (32). The handle assembly (31) comprises a handle main body (33) and a traction unit (34), the traction unit (34) being movably arranged in the handle main body (33) in the axial direction of the handle main body (33), and the traction unit (34) comprising a first traction block (341) and a second traction block (342) connected to the distal end of the pipe body (4). The driving assembly (32) is connected to the traction unit (34) and can circumferentially rotate relative to the handle main body (33) to drive the first traction block (341) and the second traction block (342) to simultaneously and oppositely move in the axial direction, such that when the first traction block (341) moves towards the proximal end, the pipe body (4) is driven to be bent in a direction different from the direction in which the pipe body (4) is driven to be bent when the second traction block (342) moves towards the proximal end. By controlling the forward rotation and the reverse rotation of one driving assembly (32), the pipe body (4) can be bent in different directions, eliminating the need for multiple positioning and ablation procedures to replace a suitable pipe body (4) during the operation process.

Description

Adjustable handles, adjustable catheters and ablation devices

Technical field

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 technique

Atrial fibrillation (atrial fibrillation) is one of the most common clinical cardiac arrhythmias. It is characterized by the loss of the orderly electrical activity under the control of sinus rhythm and its replacement by rapid and disorderly fibrillation waves. As a result, the atrium loses effective contraction and relaxation. , the pumping function deteriorates or is lost, leading to extremely irregular ventricular responses, which is one of the main causes of sudden cardiac death.

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-diagnosis atrial fibrillation and paroxysmal atrial fibrillation without relevant contraindications. , ventricular heart rate can be controlled and the basic functions of the heart can be ensured mainly through drug treatment, such as beta-blockers, amiodarone, digitalis, etc.; non-drug treatments mainly include anticoagulation therapy, electrical cardioversion, surgical maze surgery, and catheter ablation.

Catheter ablation is currently relatively mature on the market with radiofrequency ablation and cryoablation, which use interventional means to control temperature to kill abnormal myocardial cells. The overall trauma is small and the recovery period is short. However, the temperature will kill normal cells indiscriminately, which can easily cause Other complications. The currently emerging pulse ablation technology is also a type of catheter ablation. It applies a certain pulsed electric field to selectively cause irreversible electroporation of abnormal cardiomyocytes and restore normal sinus rhythm. Because pulse ablation technology also belongs to catheter interventional treatment, it has the same advantages as radiofrequency ablation and cryoablation. At the same time, because the ablation target is selective, it can avoid complications caused by damage to surrounding tissues. It is considered to be the most advanced technology in the field of electrophysiology. A generation of atrial fibrillation ablation. However, for the above various catheter ablation technologies, many ablation catheters currently on the market cannot flexibly reach different parts of the tissue, and do not have the ability to flexibly adjust the shape or position of the distal end of the ablation tube body according to individualized differences in the specific human lumen anatomy. Function, resulting in the need for multiple positioning and ablation procedures to replace the appropriate tube during the operation, making the operation complex and time-consuming, and increasing the risk of the operation.

Contents of the invention

In order to solve the above technical problems, this application discloses a bending handle, an adjustable bending catheter and an ablation device to achieve flexible adjustment of the bending state of the distal end of the tube body.

According to the first aspect of the present application, an embodiment of the present application provides a bending handle for controlling the bending of a pipe body installed at its distal end. The bending handle includes a handle assembly and a driving assembly: the handle assembly includes a handle The main body and the traction unit are movably disposed in the handle body along the axial direction of the handle body. The traction unit includes a first traction block and a second traction block connected to the distal end of the tube body. Traction block; the driving assembly is connected to the traction unit and can rotate in the circumferential direction relative to the handle body to simultaneously drive the first traction block and the second traction block to move axially in opposite directions, 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.

According to the second aspect of the present application, an embodiment of the present application provides an adjustable and bendable catheter, including: the above-mentioned bending handle; 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 Adjustable bending section; a first traction line, its proximal end is connected to the first traction block, and its distal end is connected to one side of the adjustable bending section; a second traction line, its proximal end is connected to the second The distal end of the traction block is connected to the other side of the adjustable bending section.

According to a third aspect of the present application, an embodiment of the present application provides an ablation device, including: the above-mentioned adjustable bent tube; an ablation component disposed at the distal end of the tube body, the ablation component being used to ablate the target tissue area isolation.

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:

The bending handle in the embodiment of the present application can 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. By controlling the rotation of a driving component, this application can realize the bending of the distal end of the tube body in different directions, so that the bending state of the distal end of the tube body can be flexibly adjusted according to the individual differences in the anatomical structure of the human lumen. The process no longer requires multiple positioning and ablation procedures due to replacement of suitable tube bodies, saving operation time. In addition, compared with setting up two separate drive components to control the first traction block and the second traction block respectively, this application The technical solution is more in line with the new functional integration concept design and is convenient for users to operate.

Description of the drawings

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

Figure 2 is a partial enlarged structural diagram of the ablation device A shown in Figure 1;

Figure 3 is a schematic diagram of the explosion structure of the ablation device shown in Figure 1;

Figure 4 is a partial structural diagram of the traction assembly in the ablation device shown in Figure 3;

Figure 5 is a schematic cross-sectional structural diagram of the traction assembly shown in Figure 4;

Figure 6 is a schematic view of the unfolded structure of the driving assembly and traction unit in the ablation device shown in Figure 3;

Figure 7 is a schematic structural diagram of another embodiment of the driving assembly and traction unit;

Figure 8 is a schematic structural diagram of the first traction block in the ablation device shown in Figure 3;

Figure 9 is a schematic structural diagram of the first traction block shown in Figure 8 from another perspective;

Figure 10 is a schematic structural diagram of the support shaft in the ablation device shown in Figure 3;

Figure 11 is a schematic cross-sectional structural diagram of the support shaft along the section line A-A in Figure 10;

Figure 12 is a schematic cross-sectional structural diagram of the support shaft along section line B-B in Figure 10;

Figure 13 is a structural schematic diagram of the support shaft shown in Figure 10 from another perspective;

Figure 14 is a schematic structural diagram of another embodiment of the driving assembly and traction unit;

Figure 15 is a schematic structural diagram of a driving assembly and a traction unit according to another embodiment;

Figure 16 is a schematic structural diagram of a driving assembly and a traction unit according to another embodiment;

Figure 17 is a schematic diagram of the explosion structure of the ablation device according to the second embodiment of the present application;

Figure 18 is a schematic structural diagram of the driving assembly and traction unit of the ablation device shown in Figure 17;

Figure 19 is a schematic structural diagram of a driving assembly and a traction unit according to another embodiment;

Figure 20 is a schematic structural diagram of another embodiment of the driving assembly and traction unit;

Figure 21 is a partial structural schematic diagram of the ablation device according to the third embodiment of the present application;

Figure 22 is a schematic diagram of the explosion structure of the ablation device shown in Figure 21;

Figure 23 is a schematic structural diagram of the pulling component in the ablation device shown in Figure 22.

Detailed ways

In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings.

In the description of this application, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection" and "setting" should be understood in a broad sense. For example, it can be a fixed connection or a fixed connection. It can be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood on a case-by-case basis.

For ease of understanding, in the description of this application, for the same moving object, the term "forward" refers to the clockwise direction, the term "forward rotation" refers to the rotation in the clockwise direction, and the term "reverse" refers to the counterclockwise direction. direction, the term "reverse rotation" refers to rotation in the counterclockwise direction. Or, for the same moving object, the term "forward" refers to the counterclockwise direction, the term "forward rotation" refers to the rotation in the counterclockwise direction, the term "reverse" refers to the clockwise direction, and the term "reverse rotation" refers to the rotation in the counterclockwise direction. Turn clockwise. 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 both rotating in the clockwise direction, or "forward rotation" can be interpreted as different movements. One/part of the object rotates in a clockwise direction and the other/another part rotates in a counter-clockwise direction.

For ease of description, in the field of intraluminal interventional therapy, the proximal end refers to the end of the instrument that is close to the operator after it is used for interventional treatment, and the distal end refers to the end of the instrument that is far away from the operator after it is used for interventional treatment.

Please refer to Figure 1. An embodiment of the present application provides an ablation device 100, which can ablate and isolate a target tissue area. The target tissue region may be located in the heart, including but not limited to the mitral isthmus, tricuspid isthmus, left atrium roof, pulmonary veins, or synovial There are also typical atrial flutter and trigger lesions originating from non-pulmonary veins (such as left atrial appendage, superior vena cava, coronary sinus ostia), etc. It can be understood that the target tissue area is not limited to the heart, but can also be located on other body tissues, which is not limited in this application.

The ablation device 100 includes an adjustable catheter 1 and an ablation assembly 2 . The ablation component 2 is disposed at the distal end of the adjustable and bendable catheter 1. The adjustable and bendable catheter 1 is used to drive the ablation component 2 disposed at its distal end to intervene in the target tissue area for ablation and isolation of the target tissue area. Figure 1 illustrates that the adjustable bend tube 1 includes a bending handle 3 and a tube body 4. The proximal end of the tube body 4 is connected to the bending handle 3, and the distal end of the tube body 4 is connected to the ablation component 2. The bending handle 3 can control The tube body 4 is bent in different directions, so that the orientation or position 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 lumen, so that the tube body 4 can reach the target tissue area of the human blood vessel, thereby making it possible to The tube body 4 carries the ablation component 2 to the target tissue area.

The ablation component 2 can be radially expanded to expand. The radially expanded ablation component 2 can perform circumferential ablation and isolation of tissue areas (such as the ostium of the pulmonary veins), or perform focal ablation of, for example, the mitral valve isthmus to prevent Abnormal electrical propagation and/or disruption of abnormal electrical conduction through heart tissue, treating arrhythmias and reducing the risk of many potentially fatal complications. Among them, the ablation component 2 can be radially expanded and spread out in various ways. For example, the ablation component 2 can be a self-expanding structure, and the ablation device 100 is provided with a sheath sleeved outside the tube body 4 (not shown in the figure). (shown), the sheath is used to radially compress the ablation component 2, so that the radially compressed ablation component 2 is received in the internal channel of the sheath, and the radially compressed ablation component 2 can be delivered to the target tissue area within the sheath, that is, The ablation component 2 is contained in the sheath before being released. When reaching the target tissue area, the ablation component 2 can extend out of the sheath and expand naturally. The ablation component 2 includes a supporting frame 21 and an ablation electrode 22 arranged on the supporting frame 21. The supporting frame 21 can be a self-expanding stent with shape memory function, such as a nickel-titanium alloy stent with shape memory function. The expansion of the ablation component 2 of this application means that the support frame 21 can radially expand and expand. The ablation electrode 22 may change its radial position as the support frame 21 expands. The ablation electrode 22 itself does not expand. Alternatively, the ablation component 2 can expand radially and expand under human manipulation intervention. Figure 2 shows the expansion structure of the ablation component 2 in an expanded state.

Continuing to refer to FIG. 2 , the ablation device 100 further includes an inner sheath core 5 . The distal end of the inner sheath core 5 is connected to the distal end of the supporting frame 21 . The inner sheath core 5 is movably threaded in the tube body 4 to be able to face each other in the axial direction. The movement of the tube body 4 controls the radial contraction or radial expansion of the support frame 21. On the basis of the structure shown in Figure 2, during the process of the inner sheath core 5 moving proximally relative to the tube body 4 in the axial direction, the supporting frame 21 can expand radially outward relative to the axis of the tube body 4, that is, supporting The middle part of the skeleton 21 expands toward the axis of the tube body 4; when the inner sheath core 5 moves distally in the axial direction relative to the tube body 4, the supporting framework 21 can contract radially inward relative to the axis of the tube body 4. That is to say, the middle part of the support frame 21 converges toward the axis direction of the tube body 4 .

The inner sheath core 5 can extend from the distal end of the bending handle 3 to the proximal end of the bending handle 3, thereby facilitating the control of the inner sheath core 5 to move along the axial direction at the proximal end of the bending handle 3. Referring to FIG. 3 , the ablation device 100 further includes a pulling component 6 disposed at the proximal end of the bending handle 3 . The pulling component 6 is used to drive the inner sheath core 5 to move along the axial direction toward the proximal end or the distal end. Through the control of the pulling component 6, the radial expansion and radial contraction of the ablation component 2 can be achieved.

FIG. 3 illustrates that the pulling assembly 6 includes an axially connected traction slider 61 and a traction rod 62 . The traction slider 61 is movably disposed in the bending handle 3 along the axial direction of the bending handle 3 . The proximal end of the inner sheath core 5 is connected to the traction slider 61 , and the traction rod 62 can drive the traction slider 61 to reciprocate along the axial direction, so that the inner sheath core 5 moves relative to the tube body 4 along the axial direction. Referring to FIGS. 4 and 5 , the traction slider 61 is provided with a sheath core through hole 611 extending in the axial direction, and the inner sheath core 5 is penetrated and fixed in the sheath core through hole 611 . In some embodiments, the inner sheath core 5 can be fixed to the sheath core through hole 611 through glue. In other embodiments, the inner sheath core 5 can also be fixed in the sheath core through hole 611 of the traction slider 61 through interference fit, buckle, etc. For example, Figures 4 and 5 specifically illustrate that the outer peripheral surface of the traction slider 61 is provided with a glue injection hole 613 connected to the sheath core through hole 611. In actual operation, the user can directly inject glue from the glue injection hole 613 to fix the inner sheath. Core 5.

In some embodiments, the traction slide block 61 is also provided with a slide groove 612, which can cooperate with the guide rail 301 provided inside the bending handle 3, thereby constraining the circumferential movement of the traction slide block 61 through the guide rail 301. Optionally, the glue injection hole 613 is opened on the groove surface of the slide groove 612 .

It should be noted that during the process of fixing the inner sheath core 5, in order to facilitate the adjustment of the initial shape of the support frame 21, the drawbar 62 is located at the proximal end of the drawbar 61 and the drawbar 62 is hollow inside to form an inner cavity 621. The inner cavity 621 and The sheath core through holes 611 communicate with each other in the axial direction, and the inner cavity 621 provides a space for the inner sheath core 5 to extend in the axial direction. In this way, when selecting the inner sheath core 5, a sufficiently long inner sheath core 5 can be provided to avoid internal sheath core 5 being inserted into the inner sheath core 5. The inner sheath core 5 cannot be installed due to insufficient length of the sheath core 5. At this time, the inner sheath core 5 can penetrate into the sheath core through hole 611 and reach the position of the inner cavity 621. First, adjust the initial shape of the support frame 21, and then inject glue from the glue injection hole 613 to fix the inner sheath core 5.

Continuing to refer to FIGS. 4 and 5 , the traction slider 61 is also provided with an axially extending wire through hole 614 . The wire through hole 614 extends from the distal end of the traction slider 61 to the proximal end of the traction slider 61 and is connected to the traction rod 62 The inner cavity 621 is connected, and the wire through hole 614 is used for the electrode wire 102 to pass through. The radial size of the wire through hole 614 is preferably set to be larger than the radial size of the electrode wire 102 to prevent the electrode wire 102 from passing through the wire through hole. 614 was subject to greater wear and tear. The distal end of the electrode lead 102 is connected to the ablation electrode 22 provided on the supporting frame 21, and the proximal end of the electrode lead 102 is passed through the lead through hole 614 and connected to the connector 7 provided at the proximal end of the bending handle 3 (Fig. 3) connect. The wire through hole 614 and the sheath core through hole 611 are independent of each other, that is, they are isolated from each other, so that the electrode lead 102 and the inner sheath core 5 do not affect each other, and avoid the pulling slider 61 from pulling the electrode while pulling the inner sheath core 5 Wire 102 Risks.

It should be noted that in this embodiment, the connector 7 is provided at the proximal end of the bending handle 3. Specifically, the distal end of the connector 7 is connected to the proximal end of the conduit 8, and the distal end of the conduit 8 is embedded in the drawbar. 62, so that the proximal end of the electrode wire 102 is connected to the connector 7 through the wire tube 8, thereby realizing the electrical connection between the connector 7 and the ablation electrode 22. It can be understood that in other examples, from the perspective of structural integrity, the connector 7 can be directly fixedly connected to the proximal end of the bending handle 3 without being connected to the bending handle 3 through the conduit 8 , that is, the conduit 8 is omitted.

In addition, this embodiment does not specifically limit the number of connectors 7 . The number of connectors 7 may be one, two, or other appropriate numbers. For example, when the number of ablation electrodes 22 is large, When the number of pinholes for connecting the electrode leads 102 on one connector 7 is insufficient, another connector 7 can be added, and the two connectors 7 can be fixedly connected to the proximal end of the bending handle 3 side by side.

The connector 7 is used to connect to the pulse signal source, so that the pulse signal source can transmit the pulse signal to the ablation electrode 22 through the connector 7, so that the ablation electrode 22 can transmit the pulse signal to the target tissue area for ablation. It should be explained that the ablation electrode 22 may adopt unipolar ablation or bipolar ablation. During unipolar ablation, the ablation electrode 22 on the supporting frame 21 can be set as the positive electrode, and the negative electrode is placed outside the body close to the positive electrode and in contact with human skin. During bipolar ablation, the ablation electrode 22 on the supporting frame 21 can be configured to include a positive electrode and a negative electrode. The positive electrode and negative electrode can be arranged at alternating intervals. The specific arrangement is not limited here. The number of positive electrodes/negative electrodes can be one or more. indivual. It can be understood that the connector 7 can also be connected to a non-pulse source. For example, the connector 7 can be connected to a radio frequency energy source for radio frequency ablation, or other energy forms. Alternatively, the ablation electrode 22 can perform hybrid ablation using pulses and radiofrequency.

As mentioned above, the traction slider 61 is circumferentially limited to the bending handle 3. This can be achieved by providing a chute 612 on the traction slider 61 and cooperating with the guide rail 301 provided inside the bending handle 3. . Of course, in other embodiments, the slide groove 612 can be provided in the bending handle 3 , and accordingly, the guide rail 301 is provided on the traction slide block 61 . Referring to Figure 3, in order to more easily realize the reciprocating movement of the traction slider 61 along the axial direction driven by the traction rod 62, the pulling assembly 6 of the present application also includes a traction knob 63, and the traction knob 63 is axially limited to the bending handle 3, The traction knob 63 is threadedly connected to the drawbar 62. For example, FIG. 3 shows that the traction knob 63 is sleeved on the outside of the drawbar 62. At this time, the internal thread of the traction knob 63 is threadedly connected to the external thread provided on the drawbar 62. Of course, in other embodiments, the traction knob 63 may also be partially disposed inside the drawbar 62 , in which case the external thread of the traction knob 63 is threadedly connected to the internal thread provided on the drawbar 62 . The traction knob 63 can rotate forward and reverse relative to the bending handle 3 in the circumferential direction. When the traction knob 63 rotates forward relative to the bending handle 3, it can drive the traction rod 62, the traction slider 61 and the inner sheath core 5 to move toward the proximal end in the axial direction. Under the traction of the inner sheath core 5, the distal end of the ablation component 2 The end moves toward its proximal end, so that the axial distance of the ablation component 2 becomes shorter and the radial size becomes larger, thereby causing the ablation component 2 to expand radially. When the traction knob 63 rotates in the opposite direction relative to the bending handle 3, it can drive the traction rod 62, the traction slider 61 and the inner sheath core 5 to move axially toward the distal end. Under the push of the inner sheath core 5, the distal end of the ablation component 2 The end moves toward the direction away from its proximal end, so that the axial distance of the ablation component 2 becomes longer and the radial size becomes smaller, so that the ablation component 2 shrinks radially.

As mentioned above, the bending handle 3 can control the tube body 4 to bend in different directions, so that the tube body 4 can reach the target tissue area of human blood vessels, so that the tube body 4 can carry the ablation component 2 to the tissue ablation area. The specific implementation method can be referred to Figure 3 again. The bending handle 3 includes a handle assembly 31 and a driving assembly 32. The handle assembly 31 includes a handle body 33 and a traction unit 34. The traction unit 34 is moveable along the axial direction of the handle body 33. Set inside the handle body 33. The driving assembly 32 is connected to the traction unit 34 and can rotate forward relative to the handle body 33, so that the traction unit 34 can drive the tube body 4 to bend toward one side (defined as the first side). The driving assembly 32 can also rotate in the opposite direction relative to the handle body 33. Rotate 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 first side and the second side have different directions. The first side and the second side can be at The circumferential direction of the tube body 4 is arranged at any angle. For example, the first side and the second side can be 180° apart in the circumferential direction. In this case, the directions of the first side and the second side are parallel and opposite.

The handle body 33 can be understood as a mounting housing for the traction unit 34 and the drive assembly 32 . The distal end of the handle body 33 is fixedly connected to the proximal end of the tube body 4 . The proximal end of the handle body 33 is connected to the aforementioned pulling assembly 6, and the traction slider 61 of the pulling assembly 6 is circumferentially limited to the handle body 33. The handle body 33 has a receiving cavity 33a, which is used for installing components such as the traction unit 34 and the driving assembly 32. The handle body 33 serves as a structural body and is used to be held by the operator's hand during use, thereby facilitating the operation. The handle body 33 can be injection molded from materials such as acrylonitrile-butadiene-styrene (English name: Acrylonitrile Butadiene Styrene, abbreviation: ABS) or polycarbonate (English name: Polycarbonate, abbreviation: PC) to improve the user's grip. The hand feel improves comfort. The appearance of the handle body 33 can adapt to ergonomics to meet the needs of human-computer interaction. Referring to FIG. 3 , the handle body 33 includes a first housing 331 and a second housing 332 . The first housing 331 and the second housing 332 are engaged to form an accommodation cavity 33 a. Among them, the first housing 331 and the second housing 332 are detachably connected, for example, through threaded connectors, which makes it more convenient to disassemble and assemble the internal components of the handle body 33 in terms of assembly process.

The traction unit 34 includes a first traction block 341 and a second traction block 342 for connecting with the distal end of the tube body 4 . The distal end of the tube body 4 is provided with an adjustable bending section. The adjustable bending catheter 1 of the present application also includes a first traction wire 103 and a second traction wire 104. The proximal end of the first traction wire 103 is connected to the first traction block 341. , the distal end of the first pulling wire 103 is connected to one side (the first side) of the adjustable bending section of the pipe body 4, that is, the first pulling block 341 passes through the first pulling wire 103 and is connected to the adjustable bending section of the pipe body 4. First side connection. The proximal end of the second traction wire 104 is connected to the second traction block 342 , and the distal end of the second traction wire 104 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 The second pulling wire 104 is connected to the second side of the adjustable bending section of the pipe body 4 .

The driving assembly 32 can rotate circumferentially relative to the handle body 33 to simultaneously drive the first traction block 341 and the second traction block 342 to move axially in opposite directions, so that the first traction block 341 drives the tube when moving toward the proximal end. The direction in which the adjustable bend section of the body 4 bends is different from the direction in which the second traction block 342 drives the adjustable bend section of the tube body 4 to bend when moving toward the proximal end.

The movement of the first traction block 341 and the second traction block 342 driven by the driving assembly 32 can be set as follows: when the driving assembly 32 rotates forward, the first traction block 341 moves toward the proximal end, and the second traction block 342 moves toward the distal end, The adjustable bending section of the tube body 4 is pulled by the first traction block 341 and bent toward one side (the first side); when the driving assembly 32 rotates reversely, the first traction block 341 moves toward the far end, and the second traction block 342 moves toward the distal end. The proximal end moves, and the adjustable bending section of the tube body 4 is pulled by the second traction block 342 to bend toward the other side (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 from this 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 driving component 32, so that the tube body can be flexibly adjusted according to the individualized differences in the anatomical structure of the human lumen. 4. Due to the shape of the distal end, the surgical process no longer requires the replacement of different tube bodies, that is, there is no need 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 driving assemblies 32 to control the first traction block 341 and the second traction block 342 respectively, the solution of this embodiment is more in line with the design of the new functional integration concept and is convenient for the user to operate.

In some embodiments, the driving assembly 32 is threadedly connected to the first traction block 341 and the second traction block 342 , which are movably disposed on the handle body 33 along the axial direction of the handle body 33 . 33, the first traction block 341 and the second traction block 342 are also located in the handle body 33 at the circumferential upper limit of the handle body 33, so that the driving assembly 32 can communicate with the first traction block 341 and the second traction block 342 through it when rotating. The threaded coupling of the traction block 342 drives the first traction block 341 and the second traction block 342 to move along the axial direction. Specifically, referring to FIG. 6 , 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 driving assembly 32 is provided with both a third thread 3211 and a fourth thread 3221 . 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. combine. Based on the screwing relationship between the above threads, when the driving assembly 32 rotates forward, the driving assembly 32 drives the first traction block 341 along the axial direction through the screwing effect of the third thread 3211 and the first thread 3411. While moving toward the proximal end, the driving assembly 32 also drives the second traction block 342 to move toward the distal end along the axial direction through the rotation of the fourth thread 3221 and the second thread 3421 . When the driving assembly 32 rotates in the reverse direction, the driving assembly 32 drives the first traction block 341 to move toward the distal end along the axial direction through the rotation of the third thread 3211 and the first thread 3411. The rotation of the four threads 3221 and the second threads 3421 drives the second traction block 342 to move toward the proximal end along the axial direction.

3 and 6 , the driving assembly 32 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 engaged, a third thread 3211 and a third thread 3211 are formed on the inner wall thereof. Fourth thread 3221. The third thread 3211 and the fourth thread 3221 It is a continuous internal thread structure with two spiral directions in opposite directions. Specifically, the inner wall of the first semi-cylinder 321 is provided with the third thread section 3211a and the fourth thread section 3221a, and the inner wall of the second semi-cylinder 322 is provided with the third thread section 3211b and the fourth thread section 3221b. The third thread section 3211a of the first half cylinder 321 and the third thread section 3211b of the second half cylinder 322 are connected to form a continuous third thread 3211. The fourth thread section 3221a of the first half cylinder 321 and the second half cylinder 322 are connected. The fourth thread segments 3221b are connected to form a continuous fourth thread 3221. 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 second external thread, the third thread 3211 is defined as a first internal thread, and the fourth thread 3221 is defined as The second internal thread, the first external thread and the first internal thread are screwed together, and the second external thread and the second internal thread are screwed together.

Referring to FIG. 6 , the driving assembly 32 has an axially extending composite thread arrangement section 323 , and both the first semi-cylinder 321 and the second semi-cylinder 322 are provided with the composite thread arrangement section 323 . The composite thread arrangement section 323 is arranged with third thread sections 3211a/3211b and fourth thread sections 3221a/3221b arranged to intersect with each other. The intersection of the third thread sections 3211a/3211b and the fourth thread sections 3221a/3221b can be understood here as The intersection of the first internal thread and the second internal thread. The third thread section 3211a/3211b and the fourth thread section 3221a/3221b on the composite thread arrangement section 323 both extend from the proximal end of the composite thread arrangement section 323 to the distal end of the composite thread arrangement section 323. In the composite thread arrangement section 323, when the first external thread and the first internal thread are screwed together, the second external thread and the second internal thread are screwed together. Based on the above structure of the composite thread arrangement section 323, the axial size of the driving assembly 32 can be reduced to a certain extent, thereby reducing the size of the entire device and reducing consumables.

Specifically, the third thread section 3211a/3211b and the adjacent fourth thread section 3221a/3221b of the composite thread arrangement section 323 intersect to form a V-shaped structure, and a plurality of third thread sections 3211a/3211b and fourth thread sections 3221a/ 3221b are alternately arranged so that the composite thread arrangement section 323 assumes a continuous W-shaped configuration as a whole.

It can be understood that in other embodiments, the axial size of the driving assembly 32 is not considered, or the bending amplitude of the tube body 4 connected to the bending handle 3 is small (i.e., the first traction block 341 and the second traction block When the required movement stroke of 342 is short), the driving assembly 32 may not be provided with the composite thread arrangement section 323. Referring to Figure 7, the driving assembly 32 (ie, the first semi-cylinder 321 and the second semi-cylinder 322) has a first coupling section 324 and a second coupling section 325 that are connected along the axial direction. At this time, the first internal thread 3211 is only formed In the first coupling section 324, the third thread sections 3211a and 3211b are respectively provided on the first semi-cylinder 321 and the second semi-cylinder 322 of the first coupling section 324. The second internal thread 3221 is only formed on the second coupling section 325, that is, the fourth thread sections 3221a and 3221b are respectively provided on the first semi-cylinder 321 and the second semi-cylinder 322 of the second coupling section 325. When the first semi-cylinder 321 and the second semi-cylinder 322 are engaged with each other, the third thread segments 3211a and 3211b are connected with each other to form the third thread 3211, that is, the first internal thread 3211; the fourth thread segments 3221a and 3221b are connected with each other to form a continuous thread. The fourth thread 3221 is the second internal thread 3221. On this basis, the first thread 3411 of the first traction block 341 is threadedly connected with the third thread 3211 on the first coupling section 324, and the second thread 3421 of the second traction block 342 is connected with the fourth thread 3421 on the second coupling section 325. Threaded 3221 threaded connection.

The traction unit 34 is configured such that the pipe body 4 is in a straight state when it is in the initial position, that is, the pipe body 4 is in an unbent state. Referring to FIG. 6 , FIG. 6 illustrates a schematic diagram of the traction unit 34 in an 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 composite thread arrangement section 323 , and the second thread 3421 The distal end is located between the proximal end and the distal end of the composite thread arrangement section 323. In this way, a movement space for the first thread 3411 to be relatively displaced along the axial direction after being threadedly connected to the third thread 3211 can be provided, and the second thread can be provided. 3421 is threadedly connected to the fourth thread 3221 and has a relatively displaced movement space along the axial direction. At this time, the driving assembly 32 can drive the first traction block 341 and the second traction block 342 regardless of forward or reverse rotation in the circumferential direction. Move along the axis. Furthermore, in the initial position, both the first traction block 341 and the second traction block 342 are located entirely between the proximal end and the distal end of the composite thread arrangement section 323, that is, the proximal end and the distal end of the first traction block 341 are both located in the composite thread arrangement section 323. Between the proximal end and the distal end of the threaded arrangement section 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 threaded arrangement section 323. With this arrangement, the first traction can be achieved. Based on the necessary movement stroke of the block 341 and the second traction block 342, the consumable materials for manufacturing the first traction block 341 and the second traction block 342 are reduced to achieve the purpose of saving material costs. And based on the nature of the driving assembly 32 driving the first traction block 341 and the second traction block 342 to move through threaded connection, the axial length of the first traction block 341 and the second traction block 342 does not need to be too long.

The limit angle at which the tube body 4 bends toward the first side from the initial position under the traction of the first traction block 341 is equal to the limit angle at which the tube 4 bends toward the second side under the traction of the second traction block 342 . This can be understood as the limit distance that the first traction block 341 moves toward the proximal end from the initial position is equal to the limit distance that the second traction block 342 moves from the initial position toward the proximal end.

Referring to Figure 3, the driving assembly 32 is provided with a constraining first traction block 341 and a second traction block 342 at the proximal end of the composite thread arrangement section 323. The first limiting portion 35 is used to limit the proximal movement stroke of the first traction block 341 and the second traction block 342 along the axial direction. The driving assembly 32 is also provided with a second limiting portion 36 at the distal end of the composite thread arrangement section 323 that restrains the first traction block 341 and the second traction block 342. The second limiting portion 36 is used to limit the first traction block 341 and the second traction block 342. The second traction block 342 moves axially toward the distal end. In addition to limiting the movement stroke, the first limiting part 35 and the second limiting part 36 are also used to limit the movement of the two semi-cylinders (the first semi-cylinder 321 and the second semi-cylinder 322) of the driving assembly 32. When assembled and fixed, the first limiting part 35 and the second limiting part 36 can be ferrules, and convex ribs 326 can be provided on the driving assembly 32, that is, convex ribs can be provided on both the first semi-cylinder 321 and the second semi-cylinder 322. 326, and correspondingly, clamping grooves 352 and 362 are respectively provided on the first limiting part 35 and the second limiting part 36, and the ribs 326 cooperate with the clamping grooves 352 and 362 to ensure that the two semi-cylinders are assembled together, The degree of freedom of the two semi-cylinders is limited, while ensuring the consistency of the rotation of the first limiting part 35, the second limiting part 36 and the driving assembly 32, avoiding the irregular movement of the two semi-cylinders inside the bending handle 3 and causing This leads to the problem that the first traction block 341 and the second traction block 342 cannot move in synchronized reverse direction, and when the bending force is too large, the two semi-cylinders are stretched apart, resulting in the structural failure of the bending handle 3.

Wherein, the limit distance for the first traction block 341 to move toward the proximal end along the axial direction is defined as L1, the distance for the first traction block 341 to move toward the distal end along the axial direction is L2, and the second traction block 342 moves toward the proximal end along the axial direction. The limit distance of is L3, and the limit distance of the second traction block 342 moving toward the distal end along the axial direction is L4. In the initial position, in order to bend the tube body 4 toward the first side, the first traction block 341 will move axially toward the proximal end and pull the tube body 4 to bend through the first traction line 103. Since the first traction block 341 moves along the While the second traction block 342 moves axially toward the proximal end, the second traction block 342 moves axially toward the distal end, so the limit angle at which the tube body 4 bends toward the first side under the traction of the first traction block 341 not only depends on the first traction block 341 The limit distance L1 that moves toward the proximal end along the axial direction also depends on the limit distance L4 that the second traction block 342 moves toward the distal end along the axial direction. Similarly, in order to bend the tube body 4 toward the second side, the second traction block 342 will move toward the proximal end along the axial direction and pull the tube body 4 to bend through the second traction line 104. Since the second traction block 342 moves along the axial direction, While moving toward the proximal end, the first traction block 341 moves toward the distal end along the axial direction, so the limit angle at which the tube body 4 bends toward the second side under the traction of the second traction block 342 not only depends on the second traction block 342 along the axis. The limit distance L3 that moves toward the proximal end also depends on the limit distance L2 that the first traction block 341 moves toward the distal end along the axial direction.

It can be seen from this that the limit distance of the first traction block 341 moving toward the proximal end along the axial direction can be limited by the contact between the first limiting portion 35 provided at the proximal end and the first traction block 341 , or by the contact between the first traction block 341 provided at the distal end. The second limiting part 36 is limited by contact with the second traction block 342 . The limit distance that the second traction block 342 moves toward the proximal end along the axial direction can be limited by the contact between the first limiting portion 35 provided at the proximal end and the second traction block 342 , or by the second limiting portion provided at the distal end. It is restricted by the contact between the first traction block 341 and the first traction block 341 . To sum up, in order to make the limit distance that the first traction block 341 moves from the initial position toward the proximal end equal to the limit distance that the second traction block 342 moves from the initial position toward the proximal end, there are several possible implementation solutions as follows:

Option 1: The limit distance of the first traction block 341 moving toward the proximal end along the axial direction is limited by the contact between the first limiting portion 35 provided at the proximal end and the first traction block 341, and the second traction block 342 moves along the axis. The limit distance of movement toward the proximal end is limited by the contact between the first limiting portion 35 and the second traction block 342 provided at the proximal end. That is to say: in the initial position, the axial distance from the proximal end of the first traction block 341 to the first limiting part 35 is equal to the axial distance from the proximal end of the second traction block 342 to the first limiting part 35. The first Both the traction block 341 and the second traction block 342 can move along the axial direction from the initial position to abut against the first limiting portion 35 . In this embodiment, the second limiting part 36 may not be provided, that is, the second limiting part 36 may be omitted.

When the first traction block 341 moves along the axial direction from the initial position to the position abutting the first limiting part 35 , the angle of forward rotation of the driving assembly 32 in the circumferential direction is defined as α11. When the second traction block 342 moves from the initial position The process of moving along the axial direction to the position abutting the first limiting portion 35 defines the angle of reverse rotation of the driving assembly 32 in the circumferential direction as α21. In this embodiment, the pitch of the first thread 3411 is set to be equal to the pitch of the second thread 3421, that is, the pitch of the third thread 3211 is also equal to the pitch of the fourth thread 3221. At this time, the driving assembly 32 rotates forward through the angle α11 in the circumferential direction. The angle equal to the reverse rotation of the driving assembly 32 in the circumferential direction is α21. In other embodiments, the pitch of the first thread 3411 can also be set to be different from the pitch of the second thread 3421. For example, the pitch of the first thread 3411 can be set to be smaller than the pitch of the second thread 3421, that is, the third thread The pitch of 3211 is also smaller than the pitch of the fourth thread 3221. At this time, the angle α11 of the forward rotation of the driving component 32 along the circumferential direction is greater than the angle α21 of the reverse rotation of the driving component 32 along the circumferential direction. In this way, starting from the initial position, the driving assembly 32 drives the tube body 4 to bend toward the first side and rotates in the forward direction, and the driving assembly 32 drives the tube body 4 to bend toward the second side and rotates in the reverse direction. Regardless, the tube body 4 can quickly switch from bending to one side to bending to the other side.

Option 2: The limit distance of the first traction block 341 moving toward the proximal end along the axial direction is determined by the first limiting portion 35 provided at the proximal end and the first traction The limit distance of the second traction block 342 moving toward the proximal end along the axial direction is limited by the contact between the second limiting portion 36 provided at the distal end and the first traction block 341 . That is, in the initial position, the axial distance from the proximal end of the first traction block 341 to the first limiting part 35 is equal to the axial distance from the distal end of the first traction block 341 to the second limiting part 36. The first The traction block 341 can move along the axial direction from the initial position to abutting the first limiting portion 35 , and the first traction block 341 can also move along the axial direction from the initial position to abutting the second limiting portion 36 .

In this embodiment, the pitch of the first thread 3411 can be set to be equal to the pitch of the second thread 3421. At this time, the axial distance from the proximal end of the second traction block 342 to the first limiting part 35 is set to be equal to the first traction block. 341 to the first limiting part 35, and the axial distance from the distal end of the second traction block 342 to the second limiting part 36 is set to be greater than or equal to the distal end of the first traction block 341 to The axial distance of the second limiting part 36, or, at this time, the axial distance from the proximal end of the second traction block 342 to the first limiting part 35 is set to be greater than the proximal end of the first traction block 341 to the first limiting part. 35 , and the axial distance from the distal end of the second traction block 342 to the second limiting part 36 is set to be greater than or equal to the axial distance from the distal end of the first traction block 341 to the second limiting part 36 distance to prevent the second traction block 342 from contacting the second limiting part 36 before the first traction block 341 contacts the first limiting part 35, and to prevent the second traction block 342 from contacting the first traction block 341 and the first limiting part 35. The two limiting parts 36 are in contact with the first limiting part 35 before abutting.

In this embodiment, starting from the initial position, the driving assembly 32 drives the tube body 4 to bend toward the first side and rotates in the forward direction, and the driving assembly 32 drives the tube body 4 to bend toward the second side and rotates in the reverse direction. equal.

Option 3: The limit distance of the first traction block 341 moving toward the proximal end along the axial direction is limited by the contact between the second limiting portion 36 provided at the distal end and the second traction block 342. The second traction block 342 moves along the axis. The limit distance of movement toward the proximal end can be limited by the contact between the first limiting portion 35 and the second traction block 342 provided at the proximal end. That is to say: in the initial position, the axial distance from the proximal end of the second traction block 342 to the first limiting part 35 is equal to the axial distance from the distal end of the second traction block 342 to the second limiting part 36. The second The traction block 342 can move along the axial direction from the initial position to abutting the first limiting portion 35 , and the second traction block 342 can also move along the axial direction from the initial position to abutting the second limiting portion 36 . This embodiment only replaces the first traction block 341 and the second traction block 342, which is inherently inconvenient. For details, please refer to the description of the second solution, which will not be described again here.

Scheme 4: The limit distance of the first traction block 341 moving toward the proximal end along the axial direction is limited by the contact between the second limiting portion 36 provided at the distal end and the second traction block 342. The second traction block 342 moves along the axis. The limit distance of movement toward the proximal end is limited by the contact between the second limiting portion 36 provided at the distal end and the first traction block 341 . That is to say: in the initial position, the axial distance from the distal end of the first traction block 341 to the second limiting part 36 is equal to the axial distance from the distal end of the second traction block 342 to the second limiting part 36. The first Both the traction block 341 and the second traction block 342 can move along the axial direction from the initial position to abut against the second limiting portion 36 . In this embodiment, the first limiting part 35 may not be provided, that is, the first limiting part 36 may be omitted.

In the process of the first traction block 341 moving along the axial direction from the initial position to the position abutting the second limiting portion 36 , the angle of reverse rotation of the driving assembly 32 in the circumferential direction is defined as α12. When the second traction block 342 During the process of moving from the initial position along the axial direction to the position abutting the second limiting portion 36 , the forward rotation angle of the driving assembly 32 along the circumferential direction is defined as α22. In this embodiment, the pitch of the first thread 3411 can only be set equal to the pitch of the second thread 3421. At this time, the angle α12 of the reverse rotation of the driving component 32 in the circumferential direction is equal to the angle α22 of the forward rotation of the driving component 32 in the circumferential direction.

It should be noted that the driving assembly 32 includes the first semi-cylinder 321 and the second semi-cylinder 322. In order to match the shapes of the first semi-cylinder 321 and the second semi-cylinder 322, the first traction block 341 and the second traction block 341 are The block 342 may also be configured as a semi-cylindrical structure. Referring to FIG. 3 , in the initial position, the first traction block 341 and the second traction block 342 form a cylindrical structure when they face each other. Since the structures of the first traction block 341 and the second traction block 342 are the same, Figures 8 and 9 only illustrate the structural diagram of the first traction block 341. Referring to Figures 8 and 9, the outer wall of the first traction block 341 is provided with a third A thread 3411, the first traction block 341 is provided with a through hole 3412 running through its proximal end and distal end. The through hole 3412 has a penetration end 3413 at the distal end and a penetration end 3414 at the proximal end. The penetration end 3413 is used for The first traction wire 103 whose distal end is connected to the tube body 4 passes through, and the exit end 3414 is used for the first traction wire 103 to pass out. In this embodiment, the through hole 3412 used to fix the first pulling wire 103 is set as a through hole with a gradual diameter, that is, the penetration end 3413 is set as a large opening to ensure the convenience of assembling the first pulling wire 103, and the penetration end 3414 is set The opening is of a small size so that the first traction wire 103 cannot pass through the structure after being mechanically compressed by the steel sleeve, thereby ensuring the effectiveness of the first traction block 341 in pulling the first traction wire 103 . The structure of the second traction block 342 is similar to the structure of the first traction block 341 and will not be described again here.

Since the driving assembly 32 is threadedly connected to the first traction block 341 and the second traction block 342 to drive the first traction block 341 and the second traction block 342 moves along the axial direction, so the first traction block 341 and the second traction block 342 need to be located in the handle body 33 at the upper circumferential limit of the handle body 33 . To this end, referring to FIG. 3 , the handle assembly 31 further includes a hollow support shaft 37 , which is located within the handle body 33 at its circumferential upper limit, that is, the support shaft 37 cannot rotate in the circumferential direction relative to the handle body 33 . The driving assembly 32 is threadedly coupled with the first traction block 341 and the second traction block 342 to form a sleeve structure, and the sleeve structure is sleeved on the outside of the support shaft 37 . Specifically, FIG. 3 illustrates that 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 driving assembly 32 formed by the first semi-cylinder 321 and the second semi-cylinder 322 is sleeved. outside the traction unit 34. 8 and 9, the first traction block 341 and the second traction block 342 are both provided with track grooves 3415 extending axially along the handle body 33. Referring to Figures 10 and 11, the support shaft 37 is provided with a track groove 3415 extending along the handle body 33. 33 of the axially extending slide rail 371, the first traction block 341 and the second traction block 342 respectively form an axial sliding fit with the slide rail 371 through their respective track grooves 3415, so that the slide rail 371 and the track groove 3415 The cooperation also realizes the limitation of the first traction block 341 and the second traction block 342 in the circumferential direction of the support shaft 37 . It can be understood that the track groove 3415 can also be provided on the support shaft 37 , and accordingly, 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 may be provided on the inner wall of the handle body 33. In this case, the first traction block 341 and the second traction block 342 are respectively slidably provided on the handle body. Slide 371 on 33.

It should be noted that, with reference to FIG. 12 , the internal 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 that communicates with the internal channel 372. After the tube body 4 is penetrated through the internal channel 372 of the support shaft 37, the proximal end of the tube body 4 can be bonded to the bonding position 373, thereby The relative fixation of the tube body 4 and the support shaft 37 is achieved. Specifically, referring to FIG. 13 , 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 realize the close connection of the tube body 4 The end is fixed at the bonding position 373 to ensure that there is no risk of air tightness on the outside of the pipe body 4. Secondly, with reference to Figure 3 and Figure 12, after completing the bonding step of the pipe body 4, the three-way valve 38 provided on the handle body 33 and the three-way inlet 375 provided on the support shaft 37 are tightly bonded to pass through the three-way valve 38. The three-way valve 38 ensures that there is no risk of air tightness on the side wall of the support shaft 37. At the same time, the three-way valve 38 can also be used to infuse cold saline to reduce the risk of thrombosis during the ablation process and ensure the therapeutic effect. Specifically, cold saline is injected through the three-way valve 38. The injected cold saline can flow into the gap between the inner sheath core 5 and the tube body 4. The cold saline flows in the gap between the inner sheath core 5 and the tube body 4 and flows from the tube. The distal end of the body 4 flows out to cool the ablation site and reduce the risk of thrombus formation due to excessive temperature at the ablation site.

3 and 12, the handle assembly 3 also includes a sealing cover 391 and a sealing ring 392. The sealing cover 391 is a hollow structure with openings at both ends. The sealing cover 391 resists and seals the sealing ring 392 against the proximal end of the support shaft 37. For example, Figure 12 shows that the proximal end of the support shaft 37 is provided with a threaded hole 376. The sealing cover 391 can be inserted into the threaded hole 376 at the proximal end of the support shaft 37 and is threadedly connected to the proximal end of the support shaft 37. The sealing cover 391 is connected to the support shaft 37. The threaded connection relationship allows the sealing cover 391 to 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 penetrated by the inner sheath core 5 in sequence. 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 in close contact with each other, thereby ensuring that there is no risk of air tightness at the proximal end of the support shaft 37. In actual operation, the moderately oversized sealing ring 392 can be cut with a blade on the front and back of the cross, but the two cuts do not intersect, that is, the front and back of the sealing ring 392 are not connected, and then the sealing cover 391 is used. The threaded structure matched with the support shaft 37 closes the sealing ring 392 to the support shaft 37, and then the inner sheath core 5 penetrates the sealing ring 392 through the front and back cuts of the sealing ring 392, so that the partial area of the sealing ring 392 is penetrated. The smallest and tight fit of the inner sheath core 5 ensures that there is no risk of air tightness at the 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. The risk of air leakage at the proximal end of the support shaft 37 is eliminated, and the overall structural design of the support shaft 37 still reflects a high degree of functional integration.

In order to allow the user to hold the bending handle 3 to facilitate the operation and control of the driving assembly 32, with reference to FIG. 3, the bending handle 3 of the present application also includes a bending knob 393, which is fixedly connected to the driving assembly 32. Figure 3 illustrates that the bending knob 393 is disposed at the distal end of the handle body 33 and is exposed on the handle body 33 to facilitate manual operation. The bending knob 393 is fixedly connected to the second limiting portion 36. Since the second limiting portion The portion 36 is fixedly connected to the driving assembly 32, thereby realizing the indirect fixing of the bending knob 393 relative to the driving assembly 32. The bending knob 393 is limited in the axial direction of the handle body 33 , and the bending knob 393 can carry the driving assembly 32 to rotate forward and reverse in the circumferential direction relative to the handle body 33 . It should be explained that the bending knob 393 can also be located at other positions of the handle body 33 . For example, the bending knob 393 can also be located at the proximal end of the handle body 33 . In this case, the bending knob 393 can also be connected to the first limiting portion 35 Fixed connection.

14-15 illustrate a schematic structural diagram of another embodiment of the driving assembly 32 and the traction unit 34.

The structure of the embodiment shown in Figures 14-15 is similar to that of the first embodiment, except that the bending limit angle of the tube body 4 is different. Because in the eyes Due to the differential characteristics of ablation in different locations of the target tissue, the bending angle of a certain side of the tube body 4 needs to be limited when bending. Specifically, in this embodiment, the limit angle at which the first traction block 341 drives the tube body 4 to bend toward the first side is smaller than the limit angle at which the second traction block 342 drives the tube body 4 to bend toward the second side. This can be understood that the limit distance for the first traction block 341 to move toward the proximal end from the initial position is smaller than the limit distance for the second traction block 342 to move toward the proximal end from the initial position.

As can be seen from the foregoing, the limit distance of the first traction block 341 moving toward the proximal end along the axial direction can be limited by the contact between the first limiting portion 35 provided at the proximal end and the first traction block 341 , or by the contact between the first traction block 341 provided at the distal end. The second limiting part 36 is limited by contact with the second traction block 342 . The limit distance that the second traction block 342 moves toward the proximal end along the axial direction can be limited by the contact between the first limiting portion 35 provided at the proximal end and the second traction block 342 , or by the second limiting portion provided at the distal end. It is restricted by the contact between the first traction block 341 and the first traction block 341 . To sum up, in order to make the limit distance of the first traction block 341 moving from the initial position toward the proximal end smaller than the limit distance of the second traction block 342 moving from the initial position toward the proximal end, there are several possible implementation solutions as follows:

Option 1: The limit distance of the first traction block 341 moving toward the proximal end along the axial direction is limited by the contact between the first limiting portion 35 provided at the proximal end and the first traction block 341, and the second traction block 342 moves along the axis. The limit distance of movement toward the proximal end is limited by the contact between the first limiting portion 35 and the second traction block 342 provided at the proximal end. That is, in the initial position, referring to FIG. 14 , the axial distance S1 from the proximal end of the first traction block 341 to the first limiting part 35 is smaller than the axial distance S1 from the proximal end of the second traction block 342 to the first limiting part 35 to the distance S2, and the axial distances S3 and S4 from the distal ends of the first traction block 341 and the second traction block 342 to the second limiting part 36 are set to allow both the first traction block 341 and the second traction block 342 to Move along the axial direction until it contacts the first limiting portion 35 . It should be noted that in this embodiment, the second limiting portion 36 does not need to be provided, that is, the second limiting portion 36 can be omitted.

When the first traction block 341 moves along the axial direction from the initial position to the position abutting the first limiting part 35 , the angle of forward rotation of the driving assembly 32 in the circumferential direction is defined as α11. When the second traction block 342 moves from the initial position The process of moving along the axial direction to the position abutting the first limiting portion 35 defines the angle of reverse rotation of the driving assembly 32 in the circumferential direction as α21. In this embodiment, the pitch of the first thread 3411 is set to be equal to the pitch of the second thread 3421, that is, the pitch of the third thread 3211 is also equal to the pitch of the fourth thread 3221. At this time, the driving assembly 32 rotates forward through the angle α11 in the circumferential direction. The angle smaller than the reverse rotation of the driving assembly 32 in the circumferential direction is α21. In other embodiments, the pitch of the first thread 3411 can also be set to be unequal to the pitch of the second thread 3421. For example, the pitch of the first thread 3411 can also be set to be smaller than the pitch of the second thread 3421. In this case, according to the specific The pitch value, the angle α11 of the forward rotation of the driving component 32 in the circumferential direction may be greater than, less than, or equal to the angle α21 of the reverse rotation of the driving component 32 in the circumferential direction. For example, if the difference between the pitch of the first thread 3411 and the pitch of the second thread can By making up the difference between the axial distance between the proximal end of the first traction block 341 and the first limiting part 35 and the axial distance between the proximal end of the second traction block 342 and the first limiting part 35, the driving assembly 32 can be realized. The angle α11 of the forward rotation in the circumferential direction is equal to the angle α21 of the reverse rotation of the driving assembly 32 in the circumferential direction.

Option 2: The limit distance of the first traction block 341 moving toward the proximal end along the axial direction is limited by the contact between the first limiting portion 35 provided at the proximal end and the first traction block 341, and the second traction block 342 moves along the axis. The limit distance of movement toward the proximal end is limited by the contact between the second limiting portion 36 provided at the distal end and the first traction block 341 . That is, in the initial position, the axial distance S1 from the proximal end of the first traction block 341 to the first limiting part 35 is less than the axial distance S3 from the distal end of the first traction block 341 to the second limiting part 36, That is, S1 is smaller than S3, and the axial distances S2 and S4 between the proximal end and the distal end of the second traction block 342 to the first limiting part 35 and the second limiting part 36 respectively are set to allow the first traction block 341 The first traction block 341 can move along the axial direction until it contacts the first limiting part 35 , and the first traction block 341 can also move along the axial direction until it contacts the second limiting part 36 . At this time, both the first limiting part 35 and the second limiting part 36 must be provided.

In this embodiment, starting from the initial position, the number of rotations that the driving assembly 32 drives the tube body 4 to bend toward the first side and rotate forward is smaller than the number of rotations the driving assembly 32 drives the tube body 4 to bend toward the second side and rotate in the reverse direction.

In this embodiment, referring to FIG. 14 , the pitch of the first thread 3411 is equal to the pitch of the second thread 3421 . In the initial position, the axial distance S1 from the proximal end of the first traction block 341 to the first limiting part 35 is less than The axial distance S2 from the proximal end of the second traction block 342 to the first limiting part 35, the axial distance S3 from the distal end of the first traction block 341 to the second limiting part 36, the distal end of the second traction block 342 The axial distance S4 to the second limiting part 36 and the axial distance S2 from the proximal end of the second traction block 342 to the first limiting part 35 are equal. That is: S1<S2, and S2=S3=S4. It can be seen from this that during ablation, it is convenient for the user to directly set the tube body 4 to the first side according to the length value (S2-S1) of the proximal end of the first traction block 341 beyond the proximal end of the second traction block 342. The reduction amplitude of the bending angle (the reduction amplitude is relative to the bending angle of the pipe body 4 towards the second side degree).

Option 3: Referring to Figure 15, the limit distance of the first traction block 341 moving toward the proximal end along the axial direction is limited by the contact between the second limiting portion 36 provided at the distal end and the second traction block 342. The second traction block The limit distance that 342 moves toward the proximal end along the axial direction can be limited by the contact between the first limiting portion 35 provided at the proximal end and the second traction block 342 . That is, in the initial position, the axial distance S4 from the distal end of the second traction block 342 to the second limiting part 36 is smaller than the axial distance S2 from the proximal end of the second traction block 342 to the first limiting part 35. And the axial distance S1 between the proximal end of the first traction block 341 and the first limiting part 35 and the axial distance S3 between the distal end of the first traction block 341 and the second limiting part 36 are set to allow The second traction block 342 can move along the axial direction until it contacts the first limiting part 35 , and the second traction block 342 can also move along the axial direction until it contacts the second limiting part 36 .

In this embodiment, referring to FIG. 15 , the pitch of the first thread 3411 is equal to the pitch of the second thread 3421 . In the initial position, the axial distance S4 from the distal end of the second traction block 342 to the second limiting part 36 is less than the first thread 3411 . The axial distance S3 from the distal end of a traction block 341 to the second limiting part 36, the axial distance S3 from the distal end of the first traction block 341 to the second limiting part 36, the axial distance S3 from the proximal end of the first traction block 341 to The axial distance S1 of the first limiting part 35 and the axial distance S2 from the proximal end of the second traction block 342 to the first limiting part 35 are equal. That is: S4<S3, and S1=S2=S3. It can be seen from this that during ablation, it is convenient for the user to directly set the tube body 4 to the first side according to the length value (S3-S4) of the distal end of the second traction block 342 beyond the distal end of the first traction block 341. The reduction amplitude of the bending angle (the reduction amplitude is relative to the bending angle of the tube body 4 towards the second side).

Scheme 4: The limit distance of the first traction block 341 moving toward the proximal end along the axial direction is limited by the contact between the second limiting portion 36 provided at the distal end and the second traction block 342. The second traction block 342 moves along the axis. The limit distance of movement toward the proximal end is limited by the contact between the second limiting portion 36 provided at the distal end and the first traction block 341 . That is to say: in the initial position, the axial distance S3 from the distal end of the first traction block 341 to the second limiting part 36 is greater than the axial distance S4 from the distal end of the second traction block 342 to the second limiting part 36, And the axial distances S1 and S2 from the proximal ends of the first traction block 341 and the second traction block 342 to the first limiting part 35 are set to allow both the first traction block 341 and the second traction block 342 to move along the axial direction. Move to contact the second limiting portion 36 . It should be noted that in this embodiment, the first limiting part 35 may not be provided, that is, the first limiting part 35 may be omitted.

In the process of the first traction block 341 moving along the axial direction from the initial position to the position abutting the second limiting portion 36 , the angle of reverse rotation of the driving assembly 32 in the circumferential direction is defined as α12. When the second traction block 342 During the process of moving from the initial position along the axial direction to the position abutting the second limiting portion 36 , the forward rotation angle of the driving assembly 32 along the circumferential direction is defined as α22. In this embodiment, the pitch of the first thread 3411 can be set to be equal to the pitch of the second thread 3421. At this time, the angle α12 of the reverse rotation of the driving component 32 along the circumferential direction is greater than the angle α22 of the forward rotation of the driving component 32 along the circumferential direction. That is, the driving The number of rotations of the assembly 32 that drives the tube body 4 to bend toward the first side when rotated forward is smaller than the number of rotations that the driving assembly 32 rotates reversely to drive the tube body 4 to bend toward the second side.

FIG. 16 shows a schematic structural diagram of yet another embodiment of the driving assembly 32 and the traction unit 34 .

In this embodiment, the limit angle at which the first traction block 341 drives the tube body 4 to bend toward the first side is also smaller than the limit angle at which the second traction block 342 drives the tube body 4 to bend toward the second side, and during ablation, this embodiment also It is convenient for the user to directly set the reduction range of the bending angle of the tube body 4 towards the first side (the reduction range is relative to the bending angle of the tube body 4 towards the second side). The main difference between this embodiment and the above-mentioned embodiment is that the structure of the traction unit 34 is different. Specifically, in this embodiment, the pitch of the first thread 3411 is smaller than the pitch of the second thread 3421. In the initial position, the axial distance S1 from the proximal end of the first traction block 341 to the first limiting part 35, the first The axial distance S3 from the distal end of the traction block 341 to the second limiting part 36, the axial distance S2 from the proximal end of the second traction block 342 to the first limiting part 35, and the axial distance S2 from the distal end of the second traction block 342 to the first limiting part 36. The axial distance S4 of the two limiting parts 36 is equal.

Based on the above structural characteristics of the traction unit 34, when the driving assembly 32 rotates in the reverse direction, due to the larger pitch of the second thread 3421 provided on the second traction block 342, the second traction block 342 will precede the first traction block 341. It reaches the proximal limit position in one step to contact the first limiting part 35, but the first traction block 341 cannot reach the stroke limit position and cannot contact the second limiting part 36. When the driving assembly 32 rotates forward, Since the thread 3421 provided on the second traction block 342 has a larger pitch, the second traction block 342 will reach the far end limit position one step ahead of the first traction block 341 to contact the second limiting portion 36, thereby limiting the second traction block 342. The first traction block 341 continues to move toward the proximal end, and the first traction block 341 Unable to contact the first limiting part 35, the pulling stroke of the first pulling block 341 is shortened, so the angle at which the first pulling block 341 pulls the tube body 4 to bend toward the first side is limited.

It can be seen from this that during ablation, it is convenient for the user to directly set according to the difference between the pitch of the first thread 3411 provided on the first traction block 341 and the pitch of the second thread 3421 provided on the second traction block 342. The reduction amplitude of the bending angle of the tube body 4 towards the first side (the reduction amplitude is relative to the bending angle of the tube body 4 towards the second side).

Referring to Figures 17 and 18, an ablation device 100 according to a second embodiment of the present application is shown; Figure 17 illustrates a schematic structural diagram of the ablation device 100, and Figure 18 illustrates the driving assembly 32 and the traction unit 34 of the ablation device 100. Structural diagram.

The structure of the ablation device 100 of this embodiment is similar to that of the first embodiment. For similarities, please refer to the above description of the first embodiment and will not be repeated here. The difference is that this embodiment eliminates the structure of the support shaft 37 , and the thread arrangement positions of the driving assembly 32 and the traction unit 34 are also different. Specifically, in this embodiment, the driving component 32 includes a screw that is hollow and open at both ends. The hollow cavity of the screw is used for the pipe body 4 to pass through. The driving component 32 as a screw is passed through the traction unit 34, that is, the traction unit. 34 is sleeved on the screw. At this time, the first traction block 341 and the second traction block 342 in the traction unit 34 can cooperate with the handle body 33 by setting slide rails and track grooves, so that the first traction block 341 and the second traction block 342 The two traction blocks 342 are circumferentially limited to the handle body 33 . The third thread 3211 and the fourth thread 3221 on the driving assembly 32 are continuous external threads formed on the outer wall of the screw. The first thread 3411 on the first traction block 341 and the second thread on the second traction block 342 3421 are all internal threads, the third thread 3211 as an external thread screws with the first thread 3411 as an internal thread, and the fourth thread 3221 as an external thread screws with the second thread 3421 as an internal thread, so the first The traction block 341 and the second traction block 342 can be driven to move in the axial direction.

As shown in FIG. 18 , the third thread 3211 and the fourth thread 3221 are continuously arranged for multiple turns along the axial direction of the driving assembly 32 , and the thread directions of the third thread 3211 and the fourth thread 3221 are opposite. Therefore, the third thread 3211 and the fourth thread 3221 have opposite directions. Thread 3221 has multiple intersections. Specifically, in this embodiment, the third thread 3211 and the fourth thread 3221 have the same pitch and intersect in an X shape. FIG. 19 is a schematic structural diagram of a modified form of the driving assembly 32 and the traction unit 34 of the ablation device 100 in the second embodiment.

Similar to the embodiment shown in Figures 14-15, the limit angle at which the first traction block 341 of this embodiment drives the pipe body 4 to bend toward the first side is also smaller than the limit angle at which the second traction block 342 drives the pipe body 4 to bend toward the second side. angle. That is, the limit distance that the first traction block 341 moves toward the proximal end from the initial position is smaller than the limit distance that the second traction block 342 moves from the initial position toward the proximal end. For example, FIG. 19 illustrates that in the initial position, the axial distance S1 from the proximal end of the first traction block 341 to the first limiting part 35 is smaller than the axial distance S1 from the proximal end of the second traction block 342 to the first limiting part 35 The distance S2, and the axial distances S3 and S4 between the distal ends of the first traction block 341 and the second traction block 342 and the second limiting part 36 are set such that the first traction block 341 and the second traction block 342 are both It can move along the axial direction until it comes into contact with the first limiting part 35 . The specific implementation can refer to all the embodiments shown in Figures 14-15. The difference between this embodiment and the embodiment shown in Figures 14-15 is that the driving component 32 of this embodiment is a screw, and the thread provided on the driving component 32 It is an external thread. For details, please refer to the description in Figures 17-18. More details of this embodiment will not be described again here.

FIG. 20 shows a schematic structural diagram of yet another modification of the driving assembly 32 and the traction unit 34 of the ablation device 100 in the second embodiment.

Similar to the embodiment shown in FIG. 16 , this embodiment also adjusts the bending angle of the pipe body 4 by adjusting the pitch of the first thread 3411 and the pitch of the second thread 3421 . Specifically, in this embodiment, the pitch of the first thread 3411 is smaller than the pitch of the second thread 3421. In the initial position, the axial distance S1 from the proximal end of the first traction block 341 to the first limiting part 35, the first The axial distance S3 from the distal end of the traction block 341 to the second limiting part 36, the axial distance S2 from the proximal end of the second traction block 342 to the first limiting part 35, and the axial distance S2 from the distal end of the second traction block 342 to the first limiting part 36. The axial distance S4 of the two limiting parts 36 is equal. The specific implementation can refer to all the embodiments related to Figure 16. The difference between this embodiment and the embodiment shown in Figure 16 is that the driving component 32 of this embodiment is a screw, and the threads provided on the driving component 32 are external threads. Specifically, Please refer to the description of Figures 17-18. More details of this embodiment will not be described again here.

Referring to Figures 21-23, an ablation device 100 according to a third embodiment of the present application is shown; Figures 21 and 22 illustrate a schematic structural diagram of the ablation device 100, and Figure 23 illustrates a structure of the pulling component 6 of the ablation device 100. Schematic diagram.

The structure of the ablation device 100 of this embodiment is similar to that of the first embodiment. For similarities, please refer to the above description of the first embodiment, which will not be described again here. The difference lies in the structure of the pulling component 6 . Specifically, in this embodiment, the traction rod 62 is fixed with a limiting block 622 , the limiting block 622 is located at the proximal end of the traction slider 61 , and the traction slider 61 can move toward the proximal end of the handle body 33 to abut against the handle body 33 . Holding, the traction slider 61 can move toward the distal end of the handle body 33 so that the limiting block 622 resists the handle body 33 . It should be noted that, limited to The contact between the bit block 622 and the handle body 33 limits the limit distance that the traction slider 61 can move toward the distal end in the axial direction. The contact between the traction slider 61 and the handle body 33 limits the axial movement of the traction slider 61 toward the proximal end. The limit distance of movement.

In the first embodiment, in order to ensure the self-locking property of the rear position of the inner sheath core 5 after pulling, the threaded connection between the traction knob 63 and the traction rod 62 is adopted in the first embodiment. Specifically, the traction knob 63 and the traction rod 62 are connected through a thread. The inner sheath core 5 is pulled by the pitch thread matching. In this embodiment, the thickness of the sealing ring 392 and the interference between the sealing ring 392 and the support shaft 37 are increased. At the same time, the roughness of the outer surface of the inner sheath core 5 is increased, and the cutting process of the sealing ring 392 is increased. The cross-shaped cutting without cutting through the front and back sides is changed to drilling to realize the self-locking property of the inner sheath core 5 after being pulled. Therefore, in this embodiment, the self-locking property after using the traction slider 61 to pull the inner sheath core 5 depends on two aspects after modification. On the one hand, the increase in the thickness of the sealing ring 392 causes the contact between the inner sheath core 5 and the sealing ring 392. The area increases, and the drilling process makes the gap between the inner sheath core 5 and the sealing ring 392 smaller and the fit closer after the inner sheath core 5 passes through the sealing ring 392. On the other hand, the roughness after polishing the outer surface of the inner sheath core 5 increases the friction between the inner sheath core 5 and the sealing ring 392, resulting in the need for external force to pull or push the inner sheath core 5. Relying on the rebound of the supporting frame 21 does not cause the inner sheath core 5 and the sealing ring 392 to move relative to each other.

When assembling the ablation device 100, first pass the inner sheath core 5 that passes through the sealing ring through the sheath core through hole 611 shown in Figure 23, and at the same time pass the electrode lead 102 through the wire through hole 614 shown in Figure 23 , and then adjust the support frame 21 to a retractable tube state (ie, a radially contracted state), so as to determine the initial position of the inner sheath core 5 and thereby determine the bonding position of the inner sheath core 5 and the traction slider 61 . After completing the above steps, the limiting block 622 is moved toward the distal end to contact the handle body 33. At this time, the traction slider 61 moves toward the distal end to the extreme position. At this time, the traction slider 61 is in the initial state. Then, the inner sheath core 5 and the traction slider 61 are bonded together by gluing, thereby achieving relative fixation of the inner sheath core 5 and the traction slider 61 . Therefore, during actual operation, when the user holds the proximal end of the traction rod 62 and pulls the traction slider 61 along the axial direction, the traction slider 61 can be pushed back to the proximal extreme position to contact the handle body 33. At this time, The support frame 21 is pulled by the inner sheath core 5 so that the axial size gradually decreases and the radial size gradually increases. The support frame 21 completes radial expansion. During the process of the traction slider 61 moving proximally along the axial direction, 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 frame 21 reaches the most appropriate expansion shape. . Among them, the limit distance that the traction slider 61 moves toward the proximal end along the axial direction limits the maximum radial expansion size of the support frame 21, thereby ensuring that the support frame 21 will not be overstretched and cause failure. When it is necessary to retract the sheath, that is, when it is necessary to adjust the support frame 21 from the radially expanded state to the radially contracted state, the traction rod 62 can be operated to push the traction slider 61 along the axis to the far end to the extreme position. It can be seen from this that the improved structure of the pulling assembly 6 and the sealing module in this embodiment performs better in terms of the timeliness of pulling the inner sheath core 5 .

In summary, the bending handle in the embodiment of the present application can 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 first traction block can be connected to one side of the distal end of the pipe body, and the second traction block can be connected to the other side of the distal end of the pipe body. Since the driving assembly rotates relative to the handle body, the driving assembly can simultaneously The first traction block and the second traction block are driven to move in opposite directions, that is, when the driving assembly rotates forward, the first traction block moves toward the proximal end, the second traction block moves toward the distal end, and the tube body is moved by the first traction block. When the driving assembly rotates in reverse direction, the first traction block moves toward the distal end, the second traction block moves toward the proximal end, and the tube body is pulled by the second traction block and bends toward the other side. Based on the above arrangement, 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. It can be seen that this application can realize the bending of the distal end of the tube body in different directions by controlling the rotation of a driving component, so that the bending of the distal end of the tube body can be flexibly adjusted according to the individual differences in the anatomical structure of the human lumen. In this state, the surgical process no longer requires multiple positioning and ablation procedures to replace the appropriate tube body, which saves surgical time. In addition, compared with setting up two separate drive components to control the first traction block and the second traction block respectively, In other words, the technical solution of this application is more in line with the new functional integration concept design and is convenient for users to operate.

The above-mentioned embodiments only express several implementation modes of the present application. It should be understood that the shown and described embodiments are only as examples, and the descriptions are relatively specific and detailed, but this cannot be understood as a limitation of the application. Limitations on Patent Scope. It is understood that any features described herein may be used with any embodiment. The illustrated embodiments are not exclusive of each other or other embodiments not described herein. Accordingly, this application also provides embodiments including a combination of one or more of the above embodiments. For example, in addition to applying the combination of the driving assembly and the traction unit shown in FIG. 6 , the ablation device of the third embodiment can also apply the combination of the driving assembly and the traction unit of any of the embodiments described in conjunction with FIGS. 7 and 14-16. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

A bending handle used to control the bending of a pipe body installed at its distal end, characterized in that the bending handle includes:

A handle assembly includes a handle body and a traction unit. The traction unit is movably disposed in the handle body along the axial direction of the handle body. The traction unit includes a first end connected to the distal end of the tube body. traction block and second traction block;

A driving assembly is connected to the traction unit and can rotate circumferentially relative to the handle body to simultaneously drive the first traction block and the second traction block to move axially in opposite directions, so that the third traction block 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 bending handle according to claim 1, characterized in that the first traction block and the second traction block are located in the handle body at the circumferential upper limit of the handle body, and the first traction block A first thread is provided, the second traction block is provided with a second thread, the driving assembly is provided with a third thread and a fourth thread at the same time, the spiral direction of the first thread and the second thread is opposite, so 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.
The bending handle according to claim 2, wherein the driving assembly has an axially extending composite thread arrangement section, and the composite thread arrangement section is arranged with the third thread and the third thread intersecting each other. Four threads, the third thread and the fourth thread both extend from the proximal end of the composite thread arrangement section to the distal end of the composite thread arrangement section.
The bending handle according to claim 3, characterized in that the traction unit can be in an initial position, and in the initial position, the first traction block and the second traction block are located in the composite thread arrangement. between the proximal and distal ends of the segment.
The bending handle according to claim 4, wherein the limit distance of the first traction block moving toward the proximal end from the initial position is equal to the limit distance of the second traction block moving from the initial position toward the proximal end. The limit distance is such that the limit angle at which the first traction block drives the pipe body to bend is equal to the limit angle at which the second traction block drives the pipe body to bend.
The bending handle according to claim 5, characterized in that a first limiting part is provided at the proximal end of the composite thread arrangement section, and the first limiting part is used to restrain the first traction block and the The limit distance that the second traction block moves from the initial position toward the proximal end;

In the initial position, the axial distance from the proximal end of the first traction block to the first limiting part is equal to the axial distance from the proximal end of the second traction block to the first limiting part. ; Both the first traction block and the second traction block can move along the axial direction from the initial position to abutting the first limiting portion.
The bending handle according to claim 5, characterized in that the distal end of the composite thread arrangement section is provided with a second limiting part, and the second limiting part is used to restrain the first traction block and the The limit distance that the second traction block moves from the initial position toward the far end;

The pitch of the first thread is equal to the pitch of the second thread. In the initial position, the axial distance from the distal end of the first traction block to the second limiting part is equal to the second traction block. The axial distance from the distal end of the block to the second limiting part; both the first traction block and the second traction block can move axially from the initial position to the position in contact with the second limiting part. Partial contact.
The bending handle according to claim 5, characterized in that the proximal end of the composite thread arrangement section is provided with a first limiter, and the distal end of the composite thread arrangement section is provided with a second limiter;

The pitch of the first thread is equal to the pitch of the second thread. In the initial position, the axial distance from the proximal end of the first traction block to the first limiting part is equal to the first traction block. The axial distance from the distal end of the block to the second limiting part, the first traction block can move in the axial direction from the initial position to abutting the first limiting part, and the third A traction block can also move along the axial direction from the initial position to abutting the second limiting portion.
The bending handle according to claim 8, characterized in that in the initial position, the axial distance from the proximal end of the first traction block to the first limiting part, the first traction block The axial distance from the distal end of the second traction block to the second limiting part, the axial distance from the proximal end of the second traction block to the first limiting part, and the axial distance from the distal end of the second traction block to the The axial distances of the second limiting parts are equal.
The bending handle according to claim 8, characterized in that, in the initial position, the axial distance from the proximal end of the first traction block to the first limiting part is equal to the second traction block. The axial distance between the proximal end of the first traction block and the first limiting part is smaller than the axial distance between the distal end of the first traction block and the second limiting part. The axial distance of the second limiting part.
The bending handle according to claim 8, characterized in that, in the initial position, the axial distance from the distal end of the first traction block to the second limiting part is equal to the second traction block. The axial distance from the distal end to the second limiting part, the axial distance from the proximal end of the first traction block to the first limiting part is smaller than the axial distance from the proximal end of the second traction block to the The axial distance of the first limiting part.
The bending handle according to claim 8, characterized in that, in the initial position, the proximal end of the first traction block reaches the The axial distance of the first limiting part is less than the axial distance from the proximal end of the second traction block to the first limiting part, and the distal end of the first traction block to the second limiting part The axial distance is less than the axial distance from the distal end of the second traction block to the second limiting part.
The bending handle according to claim 4, wherein the limit distance of the first traction block moving toward the proximal end from the initial position is smaller than the limit distance of the second traction block moving toward the proximal end from the initial position. The limit distance is such that the limit angle at which the first traction block drives the pipe body to bend is smaller than the limit angle at which the second traction block drives the pipe body to bend.
The bending handle according to claim 13, characterized in that a first limiting portion is provided at the proximal end of the composite thread arrangement section, and the first limiting portion is used to restrain the first traction block and the first traction block. The limit distance that the second traction block moves from the initial position toward the proximal end;

In the initial position, the axial distance from the proximal end of the first traction block to the first limiting part is smaller than the axial distance from the proximal end of the second traction block to the first limiting part. ; Both the first traction block and the second traction block can move along the axial direction to abut against the first limiting portion.
The bending handle according to claim 13, characterized in that the distal end of the composite thread arrangement section is provided with a second limiting portion, and the second limiting portion is used to restrain the first traction block and the first traction block. The limit distance that the second traction block moves from the initial position toward the far end;

In the initial position, the axial distance from the distal end of the first traction block to the second limiting part is greater than the axial distance from the distal end of the second traction block to the second limiting part. ;

The pitch of the first thread is equal to or smaller than the pitch of the second thread, and both the first traction block and the second traction block can move along the axial direction to abut against the second limiting portion.
The bending handle according to claim 13, characterized in that the proximal end of the composite thread arrangement section is provided with a first limiter, and the distal end of the composite thread arrangement section is provided with a second limiter;

In the initial position, the axial distance from the proximal end of the first traction block to the first limiting part is smaller than the axial distance from the distal end of the first traction block to the second limiting part. , the first traction block can move along the axial direction to contact the first limiting portion, and the first traction block can also move along the axial direction to contact the second limiting portion. .
The bending handle according to claim 16, wherein the pitch of the first thread is equal to the pitch of the second thread, and in the initial position, the proximal end of the first traction block reaches the The axial distance of the first limiting part is less than the axial distance from the proximal end of the second traction block to the first limiting part;

The axial distance from the distal end of the first traction block to the second limiting part, the axial distance from the distal end of the second traction block to the second limiting part, and the second traction The axial distance from the proximal end of the block to the first limiting part is equal.
The bending handle according to claim 13, characterized in that the proximal end of the composite thread arrangement section is provided with a first limiter, and the distal end of the composite thread arrangement section is provided with a second limiter;

In the initial position, the axial distance from the distal end of the second traction block to the second limiting part is smaller than the axial distance from the proximal end of the second traction block to the first limiting part. , the second traction block can move along the axial direction to contact the first limiting portion, and the second traction block can also move along the axial direction to contact the second limiting portion. .
The bending handle according to claim 18, wherein the pitch of the first thread is equal to the pitch of the second thread, and in the initial position, the distal end of the second traction block reaches the The axial distance of the second limiting part is less than the axial distance from the distal end of the first traction block to the second limiting part;

The axial distance from the distal end of the first traction block to the second limiting part, the axial distance from the proximal end of the first traction block to the first limiting part, and the second traction The axial distance from the proximal end of the block to the first limiting part is equal.
The bending handle according to claim 13, characterized in that the proximal end of the composite thread arrangement section is provided with a first limiter, and the distal end of the composite thread arrangement section is provided with a second limiter;

The pitch of the first thread is smaller than the pitch of the second thread. In the initial position, the axial distance from the proximal end of the first traction block to the first limiting part, the first traction The axial distance from the distal end of the block to the second limiting part, the axial distance from the proximal end of the second traction block to the first limiting part, the axial distance from the distal end of the second traction block to the The axial distances of the second limiting parts are equal.
The bending handle according to any one of claims 2 to 20, characterized in that the handle assembly further includes a hollow support shaft, the support shaft is located at the upper limit of the circumferential direction of the handle body. Inside, the driving component is threadedly coupled with the first traction block and the second traction block to form a sleeve structure, and the sleeve structure is sleeved on the outside of the support shaft;

The internal channel of the support shaft is used 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 bending handle according to claim 21, characterized in that the support shaft is provided with a slide rail extending along the axial direction of the handle body, and the first traction block and the second traction block are respectively slidably arranged. on the slide rail.
The bending handle according to claim 21, wherein the inner wall of the handle body is provided with a slide rail extending along the axial direction of the handle body, and the first traction block and the second traction block are respectively Slide is provided on the slide rail.
The bending handle according to any one of claims 21 to 23, characterized in that the handle assembly further includes a sealing cover and a sealing ring, the sealing cover is a hollow structure with openings at both ends, and the sealing cover will The sealing ring resists and seals against the proximal end of the support shaft, and the sealing cover, the sealing ring and the tube body can be penetrated by the inner sheath core in sequence.
The bending handle according to any one of claims 1 to 24, characterized in that the bending handle further includes a bending knob, the bending knob is fixedly connected to the driving component, and the bending knob The handle body is limited in the axial direction of the handle body, and the bending knob can carry the driving assembly to rotate forward and reverse in the circumferential direction relative to the handle body.
The bending handle according to any one of claims 2 to 25, wherein the driving assembly includes a first semi-cylinder and a second semi-cylinder that are detachably connected, and the inner wall of the first semi-cylinder is provided with A third threaded section and a fourth threaded section, the inner wall of the second semi-cylinder is provided with a third threaded section and a fourth threaded section; the third threaded section of the first semi-cylinder and the second semi-cylinder The third threaded section of the first semi-cylinder is connected to form a continuous first internal thread, and the fourth threaded section of the first semi-cylinder is connected to the fourth threaded section of the second semi-cylinder to form a continuous second internal thread. Threads; the first thread on the first traction block is a first external thread, and the second thread on the second traction block is a second external thread; the first external thread and the third An internal thread is screwed together, and the second external thread is screwed into the second internal thread.
The bending handle according to any one of claims 2 to 25, wherein the driving component includes a hollow screw rod with openings at both ends, and the third thread and the fourth thread on the driving component The thread is an external thread formed on the outer wall of the screw; the first thread on the first traction block and the second thread on the second traction block are both internal threads, and the two external threads Screw together with the two internal threads respectively.
An adjustable and bendable conduit, which is characterized by including:

The bending handle according to any one of claims 1 to 27;

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;

A first traction line, the proximal end of which is connected to the first traction block, and the distal end of which is connected to one side of the adjustable bend section;

The proximal end of the second traction wire is connected to the second traction block, and the distal end is connected to the other side of the adjustable bend section.
An ablation device, characterized by including:

The adjustable bending conduit as claimed in claim 28;

An ablation component is provided at the distal end of the tube body, and is used to ablate and isolate the target tissue area.
The ablation device according to claim 29, wherein the ablation component includes a support frame and an ablation electrode arranged on the support frame, and the support frame is capable of radial contraction and expansion;

The ablation device includes an inner sheath core, the distal end of the inner sheath core is connected to the support frame, and the inner sheath core is movably inserted into the tube body to be able to move relative to the tube body along the axial direction, Then, the radial contraction or expansion of the support frame is controlled.
The ablation device according to claim 30, characterized in that the ablation device further includes a connected traction slider and a traction rod, the traction slider is movably disposed on the handle along the axial direction of the handle body. In the main body; the proximal end of the inner sheath core is connected to the traction slider, and the traction rod can drive the traction slider to reciprocate along the axial direction, so that the inner sheath core is axially relative to the tube. body moves.
The ablation device according to claim 31, wherein the traction slider is circumferentially limited to the handle body, the ablation device further includes a traction knob, and the traction knob is axially limited to the handle body. The handle body, the traction knob can rotate relative to the handle body in the circumferential direction, and the traction knob is threadedly connected to the drawbar.
The ablation device according to claim 31, wherein the traction rod is fixed with a limiting block, the limiting block is located at the proximal end of the traction slider, and the traction slider can move toward the handle body. The proximal end moves to resist the handle body, and the traction slide block can move toward the distal end of the handle body to make the limiting block resist the handle body.