A handle and ablation catheter

Abstract

This application provides a handle and an ablation catheter, belonging to the field of ablation technology. The handle is used for the ablation catheter and includes a housing and a first sealing gasket. The first sealing gasket is disposed within the housing and has a first through hole for a movable component to pass through and a second through hole for a wire to pass through. The movable component is press-fitted with the first through hole, and the wire is press-fitted with the second through hole. This handle can reduce the risk of bleeding.

Description

Technical Field

[0001] This application relates to the field of ablation technology, and more specifically, to a handle and ablation catheter. Background Technology

[0002] Catheter ablation is used to treat various arrhythmias, tumors, and other conditions. The ablation catheter plays a crucial role in energy conduction and target localization during the procedure, serving as the instrument for ablation. Currently, with multi-lumen ablation catheters, after the movable element and suture are inserted into the handle, the handle is generally not specially sealed. Due to the large number of sutures in a multi-lumen catheter, fluids from the body's natural cavities, such as blood from blood vessels, may flow through the movable element and suture into the handle, posing a risk of bleeding from the handle. Summary of the Invention

[0003] This application provides a handle and ablation catheter that can reduce the risk of bleeding from the handle.

[0004] In a first aspect, embodiments of this application provide a handle for an ablation catheter. The handle includes a housing and a first sealing gasket. The first sealing gasket is disposed within the housing and has a first through hole for a movable member to pass through and a second through hole for a wire to pass through. The movable member is interference-fitted with the first through hole, and the wire is interference-fitted with the second through hole.

[0005] In this design, after the filament and movable component, such as the center wire, in the ablation catheter are inserted into the housing within the handle, a first sealing gasket is provided inside the housing. The movable component is press-fitted with a first through-hole on the first sealing gasket, meaning the wall of the first through-hole can apply pressure to the movable component. As a moving part, the first through-hole allows the movable component to move relative to the first through-hole of the first sealing gasket, ensuring its mobility, while also maintaining a relatively sealed state between the movable component and the wall of the first through-hole through frictional force, reducing the risk of blood on the movable component flowing through the first through-hole. Similarly, a second through-hole is provided on the first sealing gasket, and the filament is press-fitted with the second through-hole on the first sealing gasket, meaning the wall of the second through-hole can apply pressure to the filament. Through frictional force between the second through-hole and the filament, a relatively sealed state between the filament and the wall of the second through-hole is maintained, reducing the risk of blood on the filament flowing through the second through-hole. Therefore, the first sealing gasket inside the housing of the handle can promptly block blood from the moving parts and threads in the distal area of ​​the handle, reducing the risk of bleeding from the handle.

[0006] In some embodiments, there are multiple threads, and the number of threads is equal to the number of second through holes; the multiple second through holes are distributed at intervals around the outer periphery of the first through hole.

[0007] In the above technical solution, the number of second through holes on the first sealing gasket is set to multiple, and multiple second through holes can be used to insert multiple wires respectively, so as to meet the ablation requirements of multiple effect devices such as electrodes in the ablation catheter. The first sealing gasket can seal each group of wires separately, reducing the risk of bleeding from the handle.

[0008] By placing multiple second through holes on the outer periphery of the first through hole, on the one hand, the moving parts and the wires are spatially separated, which reduces the risk of interference between them. On the other hand, each wire passes through the second through hole of the first sealing gasket relatively independently, and there is a gap between adjacent wires, making it less likely for signal interference or short circuits to occur between the wires.

[0009] In some embodiments, the handle further includes a second sealing gasket disposed within the housing. The second sealing gasket has a third through hole for a movable member to pass through and a plurality of fourth through holes for multiple threads to pass through. The movable member is interference-fitted with the third through hole, and the threads are interference-fitted with the fourth through holes.

[0010] In the above technical solution, when the thread is a single strand with a circular cross-section, the sealing requirement can be met by the interference fit between the second through hole on the first sealing gasket and the thread. However, when the thread is an irregularly shaped thread, such as a stranded thread formed by twisting multiple threads together or multiple threads joined together, the first sealing gasket alone cannot effectively seal the thread. This is because there will be gaps or gaps between the second through hole of the first sealing gasket and the irregularly shaped thread. After the ablation catheter is inserted into a natural cavity of the human body, such as a blood vessel, the blood flowing in the blood vessel will leak out from the gap between the second through hole of the first sealing gasket and the thread under pressure, causing bleeding from the handle. Therefore, by setting the second sealing gasket, which has a third through hole for the moving part to pass through and multiple fourth through holes for multiple threads to pass through, the third through hole on the second sealing gasket and the first through hole on the first sealing gasket can both prevent blood seepage from the moving part, and the fourth through hole on the second sealing gasket and the second through hole on the first sealing gasket can both prevent blood seepage from the threads. The combined effect of the first sealing gasket and the second sealing gasket provides better protection against blood seepage from the moving part and the threads, especially the irregularly shaped threads, further reducing the risk of blood seepage from the handle.

[0011] In some embodiments, both the first sealing gasket and the second sealing gasket are made of flexible material.

[0012] In the above technical solution, by using flexible materials for the sealing gasket and the second sealing gasket, the deformation capacity of the first sealing gasket and the second sealing gasket can be utilized to achieve an interference fit with the first sealing gasket, the second sealing gasket, the moving parts, and the wires. The structure is simple and easy to implement.

[0013] In some embodiments, the second sealing gasket is stacked on top of the first sealing gasket.

[0014] In the above technical solution, by stacking the second sealing gasket and the first sealing gasket, on the one hand, the first and second sealing gaskets occupy less space inside the handle, resulting in a more compact internal structure of the handle housing. On the other hand, the second and first sealing gaskets cooperate with each other, with no gaps between them, further isolating blood from passing through the first and second sealing gaskets and reducing the risk of blood leakage from the handle.

[0015] In some embodiments, the first through hole and the third through hole are coaxially distributed, and the second through hole and the fourth through hole are staggered.

[0016] In the above technical solution, since the movable component is a moving part, the first and third through holes are coaxially distributed. This allows the movable component to move relative to the first sealing gasket, improving the smoothness of its movement. Furthermore, the combined effect of the first through hole in the first sealing gasket and the third through hole in the second sealing gasket creates a synergistic effect in hindering blood flow, reducing the risk of blood permeating through the first and second sealing gaskets. By misaligning the second and fourth through holes, the path of the thread passing through the first and second sealing gaskets changes. Even if blood follows the thread through the second through hole, it is less likely to flow to the fourth through hole in the second sealing gasket, increasing the difficulty of blood permeating through the second and fourth through holes and further improving the sealing effect of the first and second sealing gaskets.

[0017] In some embodiments, the distance between the fourth through hole and the third through hole is greater than the distance between the second through hole and the first through hole.

[0018] In the above technical solution, the distance between the fourth and third through holes is greater than the distance between the second and first through holes, meaning the fourth and second through holes are radially offset from each other on the first sealing gasket. On one hand, this increases the radial distance between the fourth and second through holes, improving the resistance to blood flow along the thread. On the other hand, after passing through the second through hole, the thread branches out towards the outer fourth through hole, allowing the thread to shift from a relatively centered state to a relatively dispersed one. This results in a larger spacing between multiple threads, allowing the threads to adhere more closely to the inner wall of the handle, which is more conducive to the structural assembly of the handle.

[0019] In some embodiments, the distance between each fourth through hole and the third through hole is equal, and the distance between each second through hole and the first through hole is equal.

[0020] In the above technical solution, the distance between each fourth through hole and the third through hole is equal, and the distance between each second through hole and the first through hole is equal, so that after the thread passes through the second through hole and the fourth through hole, the distribution of the thread is relatively neat and the phenomenon of messy thread distribution is not easy to occur.

[0021] In some embodiments, the handle further includes a housing, the housing being located within and connected to the housing, the housing including a first structural member and a second structural member, the first structural member and the second structural member being connected to press a first sealing gasket and a second sealing gasket together.

[0022] In the above technical solution, the housing includes a first structural component and a second structural component. The first and second structural components are connected to compress the first and second sealing gaskets, causing them to deform under pressure. This results in a tight fit between the first and second sealing gaskets, improving the sealing effect against blood. In particular, even if blood on the thread enters the second through-hole along the thread, it is less likely to pass through the gap between the first and second sealing gaskets into the fourth through-hole, further enhancing the sealing effect of the first and second sealing gaskets against blood.

[0023] In some embodiments, the second structural member has a cavity, and the first sealing gasket and the second sealing gasket are located within the cavity; the first structural member includes a flange and a first boss, the first boss being connected to the flange, the first boss being in a sealing fit with the opening of the cavity and being at least partially located within the cavity to press the first sealing gasket and the second sealing gasket together.

[0024] In the above technical solution, the second structural component has a cavity, and the first and second sealing gaskets are disposed within the cavity. The first boss of the first structural component is at least partially inserted into the cavity, pressing and fixing the first and second sealing gaskets together to ensure their sealing effect. Furthermore, the sealing fit between the first boss and the cavity opening, combined with the action of the cavity and the first boss, forms an independent, enclosed space inside the outer shell. Blood that is blocked from flowing through the moving parts and threads by the first and second sealing gaskets will remain within the cavity of the shell and will not flow out, thus reducing the likelihood of handle bleeding.

[0025] In some embodiments, the first structural member further includes a sleeve, the sleeve and the first boss being located on opposite sides of the flange; the first structural member has a first cavity penetrating the sleeve, the flange and the first boss, the first cavity being used for the insertion of a conduit and for the conduit to be connected to the first structural member.

[0026] In the above technical solution, the catheter is connected to the first cavity of the first structural component, realizing the connection between the catheter and the distal end of the handle. The first cavity is provided through the sleeve, flange and the first boss. The movable part and the thread inside the catheter pass through the first cavity and directly enter the concave cavity of the second structural component. Under the sealing action of the first sealing gasket and the second sealing gasket, blood is prevented from passing through the first sealing gasket and the second sealing gasket, so that the blood on the movable part and the thread is blocked in the concave cavity and the blood will not flow out of the concave cavity, reducing the risk of bleeding from the handle.

[0027] In some embodiments, the first structural member is bonded to the conduit, and the sleeve has a filler port communicating with the first cavity.

[0028] In the above technical solution, the conduit is bonded to the first structural component. The connection between the conduit and the first structural component is convenient and quick, and the conduit has a good fixing effect. Adhesive can be injected from both ends of the first cavity of the first structural component. By providing a glue-applying port on the sleeve that communicates with the first cavity, a small amount of adhesive can be applied through the glue-applying port, increasing the bonding strength between the conduit and the first structural component.

[0029] In some embodiments, the second structural member has a first end face close to the first structural member, and a cavity is disposed on the first end face; the flange has a second end face close to the first boss, and a second boss is disposed on the second end face; the second boss abuts against the first end face to form a gap between the first end face and the second end face.

[0030] In the above technical solution, since the first structural component and the second structural component are fastened together, a second protrusion is provided at the second end face. The second protrusion abuts against the first end face of the second structural component, so that a gap is formed between the first end face and the second end face. In this way, when the first structural component and the second structural component need to be reassembled, a tool can be inserted into the gap between the first end face and the second end face to pry open the first structural component and the second structural component, which facilitates the assembly and disassembly of the first structural component and the second structural component.

[0031] Secondly, embodiments of this application also provide an ablation catheter, which includes the handle of any of the foregoing embodiments.

[0032] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A partial structural diagram illustrating the engagement of the handle housing and the conduit in some embodiments of this application;

[0035] Figure 2 for Figure 1 A cross-sectional view of the housing of the middle handle mating with the conduit;

[0036] Figure 3 Cross-sectional views of the handle and catheter mating provided in some embodiments of this application;

[0037] Figure 4 for Figure 1 An exploded diagram showing the fit between the housing and the conduit of the middle handle;

[0038] Figure 5 for Figure 4 Schematic diagram of the structure of the first sealing gasket;

[0039] Figure 6 for Figure 4 Schematic diagram of the structure of the second sealing gasket;

[0040] Figure 7 for Figure 4 Structural diagram of the first structural component;

[0041] Figure 8 for Figure 4 Structural diagram of the second structural component;

[0042] Figure 9 This is a schematic diagram of the structure of the ablation catheter provided in some embodiments of this application;

[0043] Figure 10 This is a schematic diagram of the handle in an ablation catheter provided in some embodiments of this application;

[0044] Figure 11 A frontal sectional view of the handle in an ablation catheter provided in some embodiments of this application;

[0045] Figure 12 for Figure 11 An enlarged diagram of A in the diagram.

[0046] Icons: 100-Ablation catheter; 10-Handle; 11-Shell; 12-First structural component; 121-Flange; 1211-Second end face; 1212-Second boss; 122-First boss; 1221-Step; 123-Sleeve; 124-First cavity; 125-Applying sealant port; 13-Second structural component; 131-Cavity; 1311-Cavity body; 1312-Cavity opening; 132-First end face; 14-Shell; 20-First sealing gasket; 21-First through hole; 22-Second through hole; 30-Second sealing gasket; 31-Third through hole; 32-Fourth through hole; 40-Moving component; 50-Wire; 60-Guide tube; 70-Catheter; 80-Electrode support. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0049] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0050] In the description of the embodiments of this application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on this application. In addition, the terms "first," "second," "third," etc. are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0051] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up" and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0052] This application provides a handle; please refer to... Figures 1 to 12 The handle 10 is used for ablation catheter 100. The handle 10 includes a housing 14 and a first sealing gasket 20. The first sealing gasket 20 is disposed inside the housing 14. The first sealing gasket 20 has a first through hole 21 for the movable member 40 to pass through and a second through hole 22 for the wire 50 to pass through. The movable member 40 is press-fitted with the first through hole 21 and the wire 50 is press-fitted with the second through hole 22.

[0053] In this solution, after the filament 50 and movable component 40 in the ablation catheter 100, such as the center wire, are inserted into the housing 14 inside the handle 10, a first sealing gasket 20 is provided inside the housing 14. The movable component 40 is press-fitted with the first through hole 21 on the first sealing gasket 20, that is, the wall of the first through hole 21 can apply a compressive force to the movable component 40. As a moving part, the first through hole 21 allows the movable component 40 to move relative to the first through hole 21 of the first sealing gasket 20, ensuring the mobility of the movable component 40. At the same time, the friction between the movable component 40 and the wall of the first through hole 21 can keep the movable component 40 and the hole wall of the first through hole 21 in a relatively sealed state, reducing the risk of blood on the movable component 40 passing through the first through hole 21 along the movable component 40. Similarly, by providing a second through hole 22 on the first sealing gasket 20, the thread 50 is interference-fitted with the second through hole 22 on the first sealing gasket 20. That is, the wall of the second through hole 22 can apply a compressive force to the thread 50. Through the friction between the second through hole 22 and the thread 50, the thread 50 and the wall of the second through hole 22 are in a relatively sealed state, reducing the risk of blood on the thread 50 passing through the second through hole 22. Therefore, the provision of the first sealing gasket 20 in the housing 14 of the handle 10 can promptly block blood on the moving part 40 and the thread 50 in the distal area of ​​the handle 10, reducing the risk of bleeding from the handle 10.

[0054] The following embodiments are described in a non-limiting manner based on radiofrequency ablation. Those skilled in the art will understand that the following descriptions are merely exemplary, and similarly, the ablation catheter provided in this application can be adapted to other ablation scenarios such as ultrasound ablation, laser ablation, cryoablation, and chemical ablation after being adapted based on the application scenario.

[0055] Please refer to Figure 9 The ablation catheter 100 generally includes a handle 10, a catheter 70, and an electrode holder 80. The handle 10 is connected to the proximal end of the catheter 70, and the electrode holder 80 is located at the distal end of the catheter 70.

[0056] The movable element 40 and the wire 50 can be inserted into the catheter 70. The movable element 40 refers to the component of the ablation catheter 100 that can move along the catheter axis. One end of the movable element 40 is inserted into and connected to the handle 10, and the other end of the movable element 40 is connected to the electrode holder 80 to control the extension and contraction deformation of the electrode holder 80. The movable element 40 can be the central wire that drives the deformation of the electrode holder 80. By operating the handle 10, the movable element 40 can be pulled to move, realizing the shape switching of the electrode holder.

[0057] The wire 50 is the wiring between the effect device and / or monitoring component on the electrode holder 80 and the ablation device. The effect device refers to the component that can perform the ablation function, and the effect device can be an electrode or an ultrasonic transducer, etc. The monitoring component refers to the monitoring component that can monitor the ablation process. One end of the wire 50 is electrically connected to the effect device and / or monitoring component on the electrode holder, which means that the wire 50 can be electrically connected to the effect device on the electrode holder, or it can be electrically connected to both the effect device and the monitoring component on the electrode holder.

[0058] In some applications, the thread 50 can also be a single strand. In other applications, the thread 50 can be non-conductive, such as a thread made of polymer materials.

[0059] Of course, the wire 50 can be a multi-strand wire twisted and spirally wound together. When the wire 50 is electrically connected to both the effect device and the monitoring component, the wire 50 passing through the same second through hole 22 on the first sealing gasket 20 is a multi-strand wire. That is, each wire 50 may include a first wire and a second wire. The first wire is electrically connected to the effect device, and the second wire is electrically connected to the monitoring component. The first wire and the second wire are combined into a single wire 50, which passes through the same second through hole 22 of the first sealing gasket 20.

[0060] The monitoring components may include a temperature sensor and / or a pressure sensor. The temperature sensor monitors the ablation temperature of the ablation zone, and the pressure sensor monitors the adhesion of the electrode holder to the wall. If the monitoring components include both a temperature sensor and a pressure sensor, then the wire 50 may also include a third wire. The first wire is electrically connected to the effect device, the second wire is electrically connected to the temperature sensor, and the third wire is electrically connected to the pressure sensor. The first, second, and third wires are combined into a single wire 50, which passes through the same second through-hole 22 of the first sealing gasket 20.

[0061] Of course, the number of effect devices on the electrode holder 80 can be one or more. The effect devices in the following embodiments are all described using electrodes as an example. When there is only one electrode, there is only one second through hole 22. For electrode holder 80 with multiple electrodes, the number of sensors corresponds to the number of electrodes. Therefore, the number of second through holes 22 on the first sealing gasket 20 corresponds to the number of electrodes. Each electrode and its corresponding sensor wire 50 are selectively threaded through the second through hole 22 of the first sealing gasket 20.

[0062] The number of first sealing gaskets 20 inside the housing 14 can be one or more, and the specific number of first sealing gaskets 20 can be determined according to the actual situation. See Figures 11-12 , Figure 11 This illustrates the case where a sealing gasket is installed inside the housing 14. Figure 12 It indicates Figure 11 A partially enlarged schematic diagram showing a sealing gasket installed in the middle. See also... Figures 3-4 The diagram illustrates the structure of two sealing gaskets installed inside the housing 14.

[0063] There are several ways to achieve an interference fit between the first through hole 21 on the first sealing gasket 20 and the movable part 40, and between the second through hole 22 and the thread 50. One approach is to use a partially flexible material at the edges of the holes 21 and 22 of the first sealing gasket 20, allowing for an interference fit with the movable part 40 and the thread 50 through the flexible deformation of the first and second through holes 21 and 22. Another approach is to provide flexible sealing rings at the holes 21 and 22 of the first sealing gasket 20, allowing for an interference fit with the movable part 40 and the thread 50 through the deformation of the sealing rings. Alternatively, the first sealing gasket 20 can be made entirely of flexible material, utilizing its deformation capability to allow for changes in the opening size of the first and second through holes 21 and 22, thereby achieving an interference fit with the movable part 40 and the thread 50. The specific manner in which the first through hole 21 on the first sealing gasket 20 is interference-fitted with the moving part 40, and the second through hole 22 is interference-fitted with the wire 50, can be determined according to the actual situation.

[0064] Please refer to Figure 5The first through hole 21 and the second through hole 22 on the first sealing gasket 20 refer to through hole structures that penetrate the thickness direction of the first sealing gasket 20. The interference fit between the movable part 40 and the first through hole 21 means that the outer diameter of the movable part 40 is larger than the diameter of the first through hole 21. Utilizing the deformability of the hole portion of the first through hole 21 on the first sealing gasket 20, the diameter of the first through hole 21 can be varied within a certain range. After the movable part 40 passes through the first through hole 21, the diameter of the first through hole 21 can be enlarged to match the outer diameter of the movable part 40. Under the reset action of the first through hole 21, the hole wall of the first through hole 21 is in close contact with the outer wall of the movable part 40, thereby achieving the function of preventing blood leakage. Similarly, the diameter of the second through hole 22 can vary within a certain range. After the thread 50 passes through the second through hole 22, the diameter of the second through hole 22 can be enlarged to match the outer diameter of the thread 50. Under the resetting action of the second through hole 22, the hole wall of the second through hole 22 is in close contact with the outer wall of the thread 50, which plays a role in preventing blood leakage.

[0065] Optionally, taking a moving part 40 with a diameter of 0.3 mm as an example, the diameter of the first through hole 21 of the first sealing gasket 20 can be set to be no less than 0.2 mm and no more than 0.25 mm. In this case, the interference fit between the moving part 40 and the first through hole 21 is between 0.05 mm and 0.1 mm. Similarly, the diameter of the wire 50 is larger than the diameter of the second through hole 22, and the wire 50 and the second through hole 22 also have a certain interference fit, which will not be elaborated further here.

[0066] In some embodiments, the number of wires 50 is multiple, and the number of wires 50 is equal to the number of second through holes 22. By setting the number of second through holes 22 on the first sealing gasket 20 to multiple, multiple second through holes 22 can allow multiple wires 50 to be threaded through, meeting the ablation requirements of the ablation catheter 100 electrodes. The first sealing gasket 20 can seal each group of wires 50 separately, reducing the risk of bleeding from the handle 10.

[0067] In other embodiments, the number of threads 50 may not be equal to the number of second through holes 22 on the first sealing gasket 20. For example, the number of second through holes 22 may be less than the number of threads 50. Taking three second through holes 22 and six threads 50 as an example, the six threads 50 can be divided into three groups and respectively threaded through the three second through holes 22 on the first sealing gasket 20. Of course, the number of second through holes 22 may also be greater than the number of threads 50.

[0068] The number of wires 50 can be two, four, or six, etc., and the specific number of wires 50 can be determined according to the number of electrodes on the electrode holder 80. In this embodiment, the number of electrodes and sensors on the electrode holder 80 is six, so the number of wires 50 is six, and the wire 50 corresponding to each electrode and sensor passes through the same second through hole 22 on the first sealing gasket 20.

[0069] In some embodiments, please refer to Figure 5 Multiple second through holes 22 are spaced apart around the outer periphery of the first through hole 21. Positioning the multiple second through holes 22 on the outer periphery of the first through hole 21 serves two purposes: firstly, the movable component 40 and the wire 50 are spatially separated, reducing the risk of interference between them; secondly, each wire 50 passes through the second through hole 22 of the first sealing gasket 20 relatively independently, with gaps between adjacent wires 50, minimizing signal interference or short circuits between them.

[0070] In some embodiments, please combine Figure 2 , Figure 3 , Figure 4 and Figure 6 The handle 10 also includes a second sealing gasket 30, which is disposed inside the housing 14. The second sealing gasket 30 has a third through hole 31 for the movable member 40 to pass through and a plurality of fourth through holes 32 for multiple threads 50 to pass through. The movable member 40 is interference-fitted with the third through hole 31 and the threads 50 are interference-fitted with the fourth through holes 32.

[0071] When the thread 50 is a single strand with a circular cross-section, the sealing requirement of the thread 50 can be met by the interference fit between the second through hole 22 on the first sealing gasket 20 and the thread 50. However, when the thread 50 is an irregularly shaped thread, such as a stranded thread formed by twisting multiple threads together or multiple threads joined together, the first sealing gasket 20 alone cannot effectively seal the thread 50. This is because there will be gaps or gaps between the second through hole 22 of the first sealing gasket 20 and the thread 50. After the ablation catheter 100 is inserted into a natural cavity of the human body, such as a blood vessel, the blood flowing in the blood vessel will leak out from the gap between the second through hole 22 of the first sealing gasket 20 and the thread 50 under pressure, causing bleeding in the handle 10. Therefore, through the provision of the second sealing gasket 30, which has a third through hole 31 for the movable part 40 to pass through and multiple fourth through holes 32 for multiple threads 50 to pass through, both the third through hole 31 on the second sealing gasket 30 and the first through hole 21 on the first sealing gasket 20 can prevent blood seepage from the movable part 40, and both the fourth through holes 32 on the second sealing gasket 30 and the second through hole 22 on the first sealing gasket 20 can prevent blood seepage from the threads 50. The combined effect of the first sealing gasket 20 and the second sealing gasket 30 provides better protection against blood seepage from the movable part 40 and the threads 50, especially the irregularly shaped threads 50, further reducing the risk of blood seepage from the handle 10. In some embodiments, both the first sealing gasket 20 and the second sealing gasket 30 are made of flexible material.

[0072] The first sealing gasket 20 and the second sealing gasket 30 are made of flexible materials. The deformation capacity of the first sealing gasket 20 and the second sealing gasket 30 can be used to achieve an interference fit with the first sealing gasket 20 and the second sealing gasket 30, the moving part 40 and the wire 50. The structure is simple and easy to implement.

[0073] The flexible material of the first sealing gasket 20 can be of various types, such as liquid silicone or rubber. In this embodiment, the material of the first sealing gasket 20 is liquid silicone.

[0074] Similarly, the material of the second sealing gasket 30 can be various, including rubber or liquid silicone. The materials of the second sealing gasket 30 and the first sealing gasket 20 can be the same or different. In this embodiment, the material of the second sealing gasket 30 is the same as that of the first sealing gasket 20, which is liquid silicone.

[0075] The first sealing gasket 20 and the second sealing gasket 30 can be stacked on top of each other within the handle 10, that is, the first sealing gasket 20 and the second sealing gasket are placed close to each other. Of course, the first sealing gasket 20 and the second sealing gasket 30 can also be spaced apart, that is, there is a gap between the first sealing gasket 20 and the second sealing gasket 30.

[0076] The third through hole 31 on the second sealing gasket 30 works on the same principle as the first through hole 21 on the first sealing gasket 20 to prevent blood leakage from the moving part 40, so it will not be described in detail here. The number of fourth through holes 32 on the second sealing gasket 30 is equal to the number of second through holes 22 on the first sealing gasket 20. The diameter of the third through hole 31 can be equal to the diameter of the first through hole 21, or it can be slightly smaller than the diameter of the first through hole 21. The diameter of the fourth through hole 32 can be equal to the diameter of the second through hole 22, or it can be slightly smaller than the diameter of the second through hole 22, depending on the actual situation.

[0077] In this embodiment, the diameter of the first through hole 21 is equal to the diameter of the third through hole 31, and the diameter of the second through hole 22 is equal to the diameter of the fourth through hole 32.

[0078] In some embodiments, please refer to Figure 2 and Figure 3 The second sealing gasket 30 is stacked on top of the first sealing gasket 20. By stacking the second sealing gasket 30 and the first sealing gasket 20, on the one hand, the first sealing gasket 20 and the second sealing gasket 30 occupy less space within the handle 10, resulting in a more compact internal structure within the housing 14 of the handle 10. On the other hand, the second sealing gasket 30 and the first sealing gasket 20 cooperate with each other, with no gap between them, further isolating blood from passing through the first sealing gasket 20 and the second sealing gasket 30, thus reducing the risk of blood leakage from the handle 10.

[0079] The first sealing gasket 20 is positioned closer to the distal end of the handle 10 than the second sealing gasket 30, meaning the first sealing gasket 20 is positioned closer to the conduit 70.

[0080] It should be noted that, through the cooperation of the first sealing gasket 20 and the second sealing gasket 30, and with the first sealing gasket 20 and the second sealing gasket 30 being stacked and pressed together, the irregular thread 50 can be sealed well, reducing the risk of bleeding from the handle 10.

[0081] The second through holes 22 on the first sealing gasket 20 and the fourth through holes 32 on the second sealing gasket 30 can be coaxially distributed, that is, the second through holes 22 and the fourth through holes 32 are aligned. Alternatively, the second through holes 22 on the first sealing gasket 20 and the fourth through holes 32 on the second sealing gasket 30 can be misaligned.

[0082] In some embodiments, please refer to Figure 4 The first through hole 21 and the third through hole 31 are coaxially distributed, while the second through hole 22 and the fourth through hole 32 are staggered. Since the movable component 40 is a moving part, the coaxial distribution of the first through hole 21 and the third through hole 31 allows the movable component 40 to move relative to the first sealing gasket 20, improving the smoothness of its movement. Furthermore, the combined effect of the first through hole 21 of the first sealing gasket 20 and the third through hole 31 of the second sealing gasket 30 creates a superimposed effect on blood flow, reducing the risk of blood permeating through the first and second sealing gaskets 20 and 30. The second through hole 22 and the fourth through hole 32 are misaligned, and the path of the thread 50 when passing through the first sealing gasket 20 and the second sealing gasket 30 is changed. Even if the blood follows the thread 50 through the second through hole 22, it is not easy to flow to the fourth through hole 32 of the second sealing gasket 30. This increases the difficulty for blood to pass through the second through hole 22 and the fourth through hole 32, and further improves the sealing effect of the first sealing gasket 20 and the second sealing gasket 30 on the blood.

[0083] The coaxial distribution of the first through hole 21 and the third through hole 31 means that their central axes are collinear. The staggered distribution of the second through hole 22 and the fourth through hole 32 means that the second through hole 22 on the first sealing gasket 20 and the fourth through hole 32 on the second sealing gasket 30 are misaligned. The fourth through hole 32 and the second through hole 22 can be staggered in the circumferential direction of the first sealing gasket 20 or the second sealing gasket 30, or they can be staggered in the radial direction of the first sealing gasket 20 or the second sealing gasket 30.

[0084] When the fourth through hole 32 and the second through hole 22 are offset from each other in the circumferential direction of the first sealing gasket 20 or the second sealing gasket 30, the distance between the fourth through hole 32 and the third through hole 31 can be equal to the distance between the second through hole 22 and the first through hole 21. Of course, the distance between the fourth through hole 32 and the third through hole 31 can also be different from the distance between the second through hole 22 and the first through hole 21.

[0085] like Figure 4 As shown, when the fourth through hole 32 and the second through hole 22 are misaligned in the radial direction of the first sealing gasket 20, the distance between the fourth through hole 32 and the third through hole 31 is greater than the distance between the second through hole 22 and the first through hole 21.

[0086] In some embodiments, please combine Figure 4 , Figure 5 and Figure 6 The distance between the fourth through hole 32 and the third through hole 31 is greater than the distance between the second through hole 22 and the first through hole 21. This greater distance means the fourth through hole 32 and the second through hole 22 are radially misaligned within the first sealing gasket 20. On one hand, this increases the radial distance between the fourth through hole 32 and the second through hole 22, improving the resistance to blood flow on the thread 50. On the other hand, the thread 50, after passing through the second through hole 22, branches out towards the outer fourth through hole 32, allowing the thread 50 to move from a relatively centered state to a relatively dispersed state. This results in a larger spacing between the multiple threads 50, allowing the threads 50 to fit closer to the inner wall of the handle 10, which is more conducive to the structural assembly of the handle 10.

[0087] The distance between the fourth through hole 32 and the third through hole 31 can be equal for each fourth through hole 32 and the third through hole 31, or the distances between multiple fourth through holes 32 and the third through hole 31 can be unequal. Similarly, the distance between the second through hole 22 and the first through hole 21 can be equal for each second through hole 22 and the first through hole 21, or the distances between multiple second through holes 22 and the first through hole 21 can be unequal.

[0088] In some embodiments, the distances between each fourth through hole 32 and the third through hole 31 are equal, and the distances between each second through hole 22 and the first through hole 21 are equal. Equal distances between the fourth through holes 32 and the third through hole 31, and between the second through holes 22 and the first through hole 21, result in a neater distribution of the threads 50 after they pass through the second through holes 22 and the fourth through holes 32, reducing the likelihood of a disordered distribution of the threads 50.

[0089] Taking six groups of threads 50 as an example, the six second through holes 22 on the first sealing gasket 20 are evenly distributed at intervals along the outer periphery of the first sealing gasket 20 on the outer periphery of the first through hole 21. Figure 6As shown, the six fourth through holes 32 on the second sealing gasket 30 can be divided into three groups of sealing holes, and the two fourth through holes 32 in each group of sealing holes are arranged adjacent to each other in the circumferential direction on the second sealing gasket 30.

[0090] In some embodiments, please refer to Figure 2 and Figure 3 The handle 10 also includes a housing 11, with a housing 14 located inside and connected to the housing 11. The housing 14 includes a first structural member 12 and a second structural member 13, which are connected to press the first sealing gasket 20 and the second sealing gasket 30 together. The housing 14, with its first structural member 12 and second structural member 13, presses the first sealing gasket 20 and the second sealing gasket 30 together, causing them to deform under pressure. This results in a tight fit between the first and second sealing gaskets, improving the sealing effect against blood. In particular, even if blood on the thread 50 enters the second through hole 22 along the thread 50, it is less likely to pass through the gap between the first and second sealing gaskets 20 and enter the fourth through hole 32, further enhancing the sealing effect of the first and second sealing gaskets 20 and 30 against blood.

[0091] There are multiple ways to connect the first structural member 12 and the second structural member 13. The first structural member 12 and the second structural member 13 can be connected by a thread or by a snap-fit ​​connection.

[0092] When the first structural member 12 and the second structural member 13 are connected by a threaded connection, one of the first structural member 12 and the second structural member 13 is provided with an internal thread and the other is provided with an external thread, and the first structural member 12 and the second structural member 13 are connected by a threaded connection.

[0093] When the first structural member 12 and the second structural member 13 are connected by a snap-fit ​​method, the first structural member 12 and the second structural member 13 can be connected by a pressing process, which provides a pre-tightening effect to the first sealing gasket 20 and the second sealing gasket 30, so that there is no gap between the first sealing gasket 20 and the second sealing gasket 30, and the blood blocking effect is better.

[0094] In some embodiments, please refer to Figure 2The second structural member 13 has a cavity 131, within which the first sealing gasket 20 and the second sealing gasket 30 are located. The first structural member 12 includes a flange 121 and a first boss 122. The first boss 122 is connected to the flange 121 and is in a sealing fit with the opening 1312 of the cavity 131, and is at least partially located within the cavity 131 to press the first sealing gasket 20 and the second sealing gasket 30 together. The second structural member 13 has a cavity 131, within which the first sealing gasket 20 and the second sealing gasket 30 are disposed. The first boss 122 of the first structural member 12 is at least partially inserted into the cavity 131, pressing and fixing the first sealing gasket 20 and the second sealing gasket 30 together, providing a pressing effect to ensure the sealing effect of the first sealing gasket 20 and the second sealing gasket 30. Furthermore, the first boss 122 and the cavity opening 1312 of the cavity 131 are sealed together. Under the cooperation of the cavity 131 of the second structural member 13 and the first boss 122, an independent closed space is formed inside the outer shell 11. The blood that is blocked and isolated on the moving part 40 and the thread 50 by the first sealing gasket 20 and the second sealing gasket 30 will also remain in the cavity 131 of the outer shell 14 and will not flow out of the cavity 131. Therefore, the handle 10 is not prone to bleeding.

[0095] The first structural member 12 and the second structural member 13 are fastened together, meaning that the first boss 122 and the cavity 131 of the second structural member 13 are engaged. The outer peripheral surface of the first boss 122 protrudes to form a stepped portion 1221, please refer to... Figure 8 The cavity 131 on the second structural member 13 includes an opening 1312 and a cavity 1311. The first sealing gasket 20 and the second sealing gasket 30 are located inside the cavity 1311. The opening 1312 communicates with the interior of the cavity 1311 and is located on the side of the second structural member 13 closer to the first structural member 12. The opening 1312 allows the first boss 122 to enter the cavity 1311. When the first structural member 12 and the second structural member 13 are pressed together, the stepped portion 1221 of the first boss 122 passes through the opening 1312 and enters the cavity 1311, where it is engaged with the inner end face of the opening 1312, preventing the first structural member 12 from separating from the second structural member 13. The first boss 122 presses the first sealing gasket 20 and the second sealing gasket 30 against the cavity 1311 of the second structural member 13.

[0096] In some embodiments, the first structural member 12 further includes a sleeve 123, with the sleeve 123 and the first boss 122 located on opposite sides of the flange 121, respectively. The first structural member 12 has a first cavity 124 penetrating the sleeve 123, the flange 121, and the first boss 122. The first cavity 124 is used for the conduit 70 to pass through and connect to the first structural member 12. The conduit 70 is connected to the first cavity 124 of the first structural member 12, thereby connecting the conduit 70 to the distal end of the handle 10. The first cavity 124 is provided through the sleeve 123, flange 121 and first boss 122. The movable part 40 and the thread 50 in the conduit 70 pass through the first cavity 124 and directly enter the cavity 131 of the second structural member 13. Under the sealing effect of the first sealing gasket 20 and the second sealing gasket 30, blood is prevented from passing through the first sealing gasket 20 and the second sealing gasket 30, so that the blood on the movable part 40 and the thread 50 is blocked in the cavity 131 and the blood will not flow out of the cavity 131, reducing the risk of bleeding from the handle 10.

[0097] In some embodiments, the first structural member 12 is bonded to the conduit 70, and the sleeve 123 has a glue inlet 125 communicating with the first cavity 124. Bonding the conduit 70 to the first structural member 12 is convenient and quick, provides good fixation of the conduit 70, and allows glue to be injected from both ends of the first cavity 124 of the first structural member 12. By providing the glue inlet 125 on the sleeve 123 communicating with the first cavity 124, a small amount of glue can be applied through the glue inlet 125, increasing the bonding strength between the conduit 70 and the first structural member 12.

[0098] The number of 125 glue repair nozzles can be one or more, and the specific number of 125 glue repair nozzles can be determined according to the actual situation.

[0099] In some embodiments, please combine Figure 4 , Figure 7 and Figure 8The second structural member 13 has a first end face 132 close to the first structural member 12, and a cavity 131 is disposed on the first end face 132; the flange 121 has a second end face 1211 close to the first boss 122, and a second boss 1212 is disposed on the second end face 1211; the second boss 1212 abuts against the first end face 132 so that a gap is formed between the first end face 132 and the second end face 1211. Since the first structural member 12 and the second structural member 13 are fastened together, a second protrusion 1212 is provided at the second end face 1211. The second protrusion 1212 abuts against the first end face 132 of the second structural member 13, so that a gap is formed between the first end face 132 and the second end face 1211. In this way, when the first structural member 12 and the second structural member 13 need to be reassembled, a tool can be inserted into the gap between the first end face 132 and the second end face 1211 to pry open the first structural member 12 and the second structural member 13, which facilitates the assembly and disassembly of the first structural member 12 and the second structural member 13.

[0100] A guide tube 60 is provided at the near end of the second structural member 13. The guide tube 60 allows the movable member 40 to pass through the second structural member 13 and then be inserted. The guide tube 60 can play a certain guiding role for the movable member 40.

[0101] This application also provides an ablation catheter, the ablation catheter 100 including the handle 10 of any of the foregoing embodiments.

[0102] The ablation catheter 100 can be used in ablation scenarios such as radiofrequency ablation, ultrasound ablation, laser ablation, cryoablation, and chemical ablation, without being limited to specific scenarios.

[0103] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0104] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A handle for an ablation catheter, characterized in that, include: case; A first sealing gasket is disposed inside the housing. The first sealing gasket has a first through hole for a movable part to pass through and a second through hole for a thread to pass through. The movable part is interference-fitted with the first through hole, and the thread is interference-fitted with the second through hole. The number of the threads is multiple, and the number of the threads is equal to the number of the second through holes; the multiple second through holes are distributed at intervals around the outer periphery of the first through hole; A second sealing gasket is disposed inside the housing. The second sealing gasket has a third through hole for the movable member to pass through and a plurality of fourth through holes for the plurality of threads to pass through. The movable member is interference-fitted with the third through hole, and the threads are interference-fitted with the fourth through holes. The first through hole and the third through hole are coaxially distributed, while the second through hole and the fourth through hole are misaligned.

2. The handle according to claim 1, characterized in that, Both the first and second sealing gaskets are made of flexible material.

3. The handle according to claim 1, characterized in that, The second sealing gasket is stacked on top of the first sealing gasket.

4. The handle according to claim 1, characterized in that, The distance between the fourth through hole and the third through hole is greater than the distance between the second through hole and the first through hole.

5. The handle according to claim 4, characterized in that, The distance between each of the fourth through holes and the third through hole is equal, and the distance between each of the second through holes and the first through hole is equal.

6. The handle according to claim 1, characterized in that, The handle also includes a housing, the housing being located inside the outer casing and connected to the outer casing; The housing includes a first structural member and a second structural member, which are connected to press the first sealing gasket and the second sealing gasket together.

7. The handle according to claim 6, characterized in that, The second structural member has a cavity, and the first sealing gasket and the second sealing gasket are located in the cavity; the first structural member includes a flange and a first boss, the first boss is connected to the flange, the first boss is in sealing fit with the opening of the cavity and is at least partially located in the cavity to press the first sealing gasket and the second sealing gasket together.

8. The handle according to claim 7, characterized in that, The first structural component further includes a sleeve, and the sleeve and the first boss are respectively located on opposite sides of the flange; the first structural component has a first cavity penetrating the sleeve, the flange and the first boss, the first cavity being used for the insertion of a conduit and for the conduit to be connected to the first structural component.

9. The handle according to claim 8, characterized in that, The first structural component is bonded to the conduit, and the sleeve has a filling port that communicates with the first cavity.

10. The handle according to claim 7, characterized in that, The second structural member has a first end face close to the first structural member, and the cavity is disposed on the first end face; the flange has a second end face close to the first boss, and the second end face is provided with a second boss; the second boss abuts against the first end face to form a gap between the first end face and the second end face.

11. An ablation catheter, characterized in that, Includes the handle according to any one of claims 1-10.

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