A catheter device and ablation apparatus for ease of manipulation

Abstract

This application discloses a user-friendly catheter device and ablation apparatus, relating to the field of medical device technology, including a catheter assembly, a control handle, an injection chamber, and a seal. The catheter assembly includes an inner tube, an outer tube, and a balloon. The gap between the inner and outer tubes forms a media channel. The distal end of the balloon is connected to the inner tube, and the proximal end of the balloon is connected to the outer tube. The control handle is connected to the proximal end of the catheter assembly and includes a control component connected to the inner tube. The inner tube can move axially relative to the outer tube under the action of the control component to adjust the balloon's switching between a contraction and inflation configuration. The injection chamber is located within the control handle, communicating with the proximal end of the media channel, and is sleeved outside the inner tube. The seal blocks the injection chamber and has a fixing hole that accommodates axial movement of the inner tube relative to the injection chamber. This user-friendly catheter device and ablation apparatus solves the problem of simultaneously adjusting the deformation of the catheter balloon and maintaining sealing stability during multiple movements.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to an easy-to-operate catheter device and ablation equipment. Background Technology

[0002] In recent years, the number of atrial fibrillation treatments via catheter ablation has increased significantly. Catheter ablation involves inserting an ablation catheter into the heart chamber and using an electrode at the distal end of the catheter to release energy, ablating or isolating the myocardial tissue causing atrial fibrillation.

[0003] In existing technologies, ablation catheters need to be close to human tissue to release energy for ablation. Furthermore, because the ablation catheter needs to be traversed through tortuous tissue to reach the target location, a small outer diameter is required, which involves catheter deformation after insertion. Additionally, a medium needs to be injected into the balloon at the distal end of the catheter to achieve ideal inflation and ensure support for the close proximity. However, due to the device's design, multiple ablation procedures require repeated balloon inflation and deflation, making it difficult to simultaneously adjust the catheter and balloon deformation and maintain sealing stability during multiple procedures. Utility Model Content

[0004] The purpose of this application is to provide an easy-to-operate catheter device and ablation equipment, which solves the problem of difficulty in balancing the deformation adjustment and sealing stability of the catheter balloon during multiple activities.

[0005] To achieve the above objectives, this application provides an easily operable catheter device, comprising:

[0006] A catheter assembly includes an inner tube, an outer tube, and a balloon body, wherein the gap between the inner tube and the outer tube forms a media channel, the distal end of the balloon body is connected to the inner tube, and the proximal end of the balloon body is connected to the outer tube;

[0007] A control handle, connected to the proximal end of the catheter assembly, includes a control component connected to the inner tube, which is axially movable relative to the outer tube under the action of the control component to adjust the cyst body to switch between a contraction configuration and an inflation configuration.

[0008] An injection chamber is located inside the control handle, the injection chamber is connected to the proximal end of the medium channel, and the injection chamber is sleeved on the outside of the inner tube;

[0009] A sealing element is provided to seal the injection cavity and has a fixing hole, which accommodates the axial movement of the inner tube relative to the injection cavity.

[0010] In some embodiments, the easily operable catheter device further includes a sleeve movably embedded in the seal, the sleeve being fitted over the inner tube and having a higher hardness than the inner tube, one end of the sleeve being disposed within the injection cavity, and the other end of the sleeve passing through the seal and connected to the control component.

[0011] And / or, the inner tube includes a hardened section, one end of which is disposed within the injection cavity, and the other end of which passes through the seal and is connected to the control assembly.

[0012] In some embodiments, the control handle has a sliding groove, and the control component includes an operating member that passes through the sliding groove and is connected to the sleeve or the hardened section. The operating member is used to drive the inner tube to move axially relative to the outer tube.

[0013] In some embodiments, the seal is an integrally formed elastomer, and the seal includes a sealing body, a sealing outer ring, a sealing inner ring, and a transition portion;

[0014] Both the outer sealing ring and the inner sealing ring are connected to the side of the sealing body facing the injection cavity. The radial dimension of the outer sealing ring gradually increases in the direction away from the sealing body, and the radial dimension of the inner sealing ring gradually decreases in the direction away from the sealing body.

[0015] The outer sealing ring is used to abut against the inner wall of the injection cavity, the inner sealing ring is used to abut against the outer wall of the sleeve or the hardened section, and the transition portion is the deformable area between the outer sealing ring and the inner sealing ring.

[0016] In some embodiments, the easily operable catheter device further includes a limiting structure, the limiting structure including a limiting protrusion and a limiting member engaging with the limiting protrusion, the limiting member being connected to one of the inner tube and the operating handle, and the limiting protrusion being connected to the other.

[0017] The limiting member includes a plurality of limiting grooves distributed along the axial direction, the limiting grooves restricting the movement of the limiting member between a first position and a second position.

[0018] In some embodiments, the limiting member is an integrally formed elastic body, the limiting member having a first piece and a second piece parallel to the axial direction, the first piece having a plurality of limiting grooves distributed along the axial direction, the second piece being fixedly connected to the inner tube or the control handle, the first piece and the second piece being connected to one side and having a variable gap on the other side.

[0019] In some embodiments, the number of seals is at least two, each seal is continuously arranged along the axial direction, and each seal has a lubrication isolation layer on its inner side.

[0020] In some embodiments, the catheter assembly further includes a middle tube disposed between the inner tube and the outer tube, wherein the proximal ends of the outer tube, the middle tube, and the inner tube are arranged axially offset in sequence, the proximal end of the outer tube is connected to the distal end of the control handle, the proximal end of the middle tube communicates with the injection cavity, and the proximal end of the inner tube is connected to the proximal end of the control handle.

[0021] The medium channel is formed between the middle tube and the inner tube, and the electrical connection channel is formed between the middle tube and the outer tube. The electrical connection channel and the medium channel are separated from each other, and the electrical connection channel is used for wires to be connected to multiple electrodes disposed on the capsule.

[0022] In some embodiments, the control handle has an inner cavity arranged along the axial direction, and the control handle also has an electrical connection line and a medium pipeline respectively disposed on both sides of the inner cavity. The electrical connection line is connected to the electrical connection channel, and the medium pipeline is connected to the medium channel.

[0023] The control handle has an inner tube interface that communicates with the inner tube cavity at its proximal end. The control handle also has a first opening and a second opening symmetrically arranged relative to the inner tube interface. The first opening is connected to the medium pipeline, and the second opening is connected to the electrical connection line.

[0024] This application provides an ablation device, including a media pipeline connector, an electrical connection connector, a media circulation device, a main unit, and a catheter device as described in any one of the above. The media circulation device is connected to the media pipeline of the catheter device through the media pipeline connector. The main unit is connected to the electrical connection line of the easily operable catheter device through the electrical connection connector. The inner tube interface of the easily operable catheter device allows the mapping catheter and / or contrast fluid to enter.

[0025] Compared to the aforementioned background technology, the easily operable catheter device provided in this application includes a catheter assembly, a control handle, an injection chamber, and a seal. The catheter assembly includes an inner tube, an outer tube, and a capsule. The gap between the inner and outer tubes forms a media channel. The distal end of the capsule is connected to the inner tube, and the proximal end of the capsule is connected to the outer tube. The control handle is connected to the proximal end of the catheter assembly and includes a control component connected to the inner tube. The inner tube can move axially relative to the outer tube under the action of the control component to adjust the switching between a contraction and inflation configuration of the capsule. The injection chamber is located within the control handle, communicating with the proximal end of the media channel, and is sleeved outside the inner tube. The seal blocks the injection chamber and has a fixing hole that accommodates axial movement of the inner tube relative to the injection chamber.

[0026] This design allows for the following: when the control handle is pulled back from the inner tube, an expansion medium is injected into the ablation chamber through the medium channel, causing the ablation chamber to expand (expansion structure); when the control handle is pushed out from the inner tube, the expansion medium in the ablation chamber is discharged through the medium channel, causing the ablation chamber to contract (retraction structure). The seal maintains a continuous seal during the axial movement of the inner tube. In this way, during multiple ablation procedures, the combination of the injection chamber and the seal effectively prevents leakage of the medium from the gap between the inner tube and the injection chamber. This design ensures that while the movement of the inner tube controls the state of the ablation chamber, the relative movement between the inner tube and the injection chamber does not compromise the seal. This guarantees smooth movement of the inner tube while maintaining stable pressure in the ablation chamber. Thus, it balances the support for deformation adjustment of the ablation chamber and the stability of the seal during multiple ablation procedures, avoiding safety hazards, extending the device's lifespan, and allowing operators to precisely control the state of the ablation chamber for optimal ablation results. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the assembly structure of the catheter device that is easy to operate in the embodiments of this application.

[0029] Figure 2 for Figure 1 A schematic diagram of the internal structure of the control handle in the easily operable catheter device is shown.

[0030] Figure 3 for Figure 1 A partial cross-sectional view of the control handle in the easily operable catheter device shown.

[0031] Figure 4 for Figure 2 A schematic diagram showing the connection of the injection chamber, seal, sleeve, operating parts, and connectors.

[0032] Figure 5 for Figure 4 A schematic diagram of the structure of the central sealing component.

[0033] Figure 6 for Figure 4 A cross-sectional view of the central seal.

[0034] in:

[0035] 10-Catheter assembly, 11-Inner tube, 12-Outer tube, 13-Middle layer tube;

[0036] 20 - Capsule, 21 - Electrode;

[0037] 30-Control handle, 31-Handle housing, 311-Inner cavity, 312-Mounting port, 313-First opening, 314-Second opening, 32-Control component, 321-Operating element, 322-Connector;

[0038] 40 - Injection cavity;

[0039] 50-Seal element, 51-Seal body, 52-Seal outer ring, 521-Outer ring protrusion, 53-Seal inner ring, 531-Inner ring protrusion, 54-Transition part;

[0040] 60-Casing;

[0041] 70 - Limiting structure, 71 - Limiting component, 72 - Limiting protrusion;

[0042] 80 - Medium piping, 81 - Medium piping connector;

[0043] 90 - Electrical connection line, 91 - Electrical connection connector. Detailed Implementation

[0044] 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. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] In the specific embodiments, the distal end refers to the part of the corresponding component that is farther away from the surgeon or operator, usually the end where the component enters the patient's body or surgical area. The proximal end is the part of the corresponding component that is closer to the surgeon or operator, usually the end that the surgeon or operator holds or manipulates. For a single component, the end closer to the surgeon or operator is the proximal end, and the end farther away from the surgeon or operator is the distal end. Furthermore, in this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "communication" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] The easy-to-operate catheter device provided in this application includes a catheter assembly 10, a control handle 30, an injection chamber 40, and a seal 50.

[0048] The catheter assembly 10 includes an inner tube 11, an outer tube 12, and a balloon 20. The gap between the inner tube 11 and the outer tube 12 forms a media channel. The distal end of the balloon 20 is connected to the inner tube 11, and the proximal end of the balloon 20 is connected to the outer tube 12. In this way, the inflation medium flows into the balloon 20 through the media channel to bring the balloon 20 to a set working state.

[0049] The control handle 30 is connected to the proximal end of the catheter assembly 10. The control handle 30 includes a control component 32 connected to the inner tube 11. The inner tube 11 can move axially relative to the outer tube 12 under the action of the control component 32 to adjust the switching of the bladder 20 between the contraction configuration and the inflation configuration.

[0050] The injection chamber 40 is located inside the control handle 30, and the injection chamber 40 is connected to the proximal end of the media channel, and the injection chamber 40 is sleeved on the outside of the inner tube 11. Thus, the inflation medium injected into the injection chamber 40 can flow into the capsule 20 through the media channel, so that the capsule 20 reaches the set working state.

[0051] The sealing element 50 blocks the injection cavity 40 and is provided with a fixing hole, which accommodates the inner tube 11 to move axially relative to the injection cavity 40.

[0052] As can be seen, while sealing the injection cavity 40, the sealing element 50 provides an axial guide and sealing interface for the inner tube 11 using its fixing hole. On the one hand, the fixing hole forms a sliding fit with the inner tube 11, which, together with the injection cavity 40, limits the inner tube, ensuring that the inner tube 11 always moves smoothly along the axis within the injection cavity 40, avoiding deviation and shaking; on the other hand, the sealing element 50 (which can be made of an elastic material, such as rubber or silicone) can continuously provide radial sealing force during the sliding process of the inner tube 11, preventing the filling medium from leaking along the outer wall of the inner tube 11.

[0053] Of course, depending on actual needs, the injection cavity 40 can be composed of an injection valve body. The injection valve body is installed in the handle housing 31 of the control handle 30 via a snap-fit ​​mechanism. The injection valve body is made of PC material with good transparency, which facilitates visual sealing of the injection cavity 40 during product assembly. The sealing element 50 is connected to the injection valve body by adhesive filling. In some embodiments, the radial dimension of the injection cavity 40 can gradually decrease or decrease in a stepped manner along the direction toward the distal end of the control handle 30 (i.e., away from the sealing element 50), such as... Figure 4 As shown, the structure at the distal end of the injection chamber 40 serves as a support for the inner tube 11, preventing swaying and eccentricity of the inner tube during movement and ensuring stability. In addition, the larger radial dimension at the proximal end of the injection chamber 40 also ensures the freedom of movement of the inner tube 11 and deformation of the seal 50. At the same time, when the inner tube 11 moves, the medium being displaced or drawn in has more space to "buffer," reducing the rate of pressure change and minimizing pressure fluctuations in the proximal medium. When the inner tube 11 moves and pushes the medium towards the proximal end, the flow velocity naturally decreases after the medium enters the large space at the proximal end, weakening the turbulence and eddies generated by high-speed flow. The low flow velocity reduces the "shearing and scouring" of the seal by the medium, preventing wear of the seal and failure of the sealing surface.

[0054] As can be seen from the above, when the control handle 30 pulls back the inner tube 11, an expansion medium is injected into the bladder 20 through the medium channel, causing the bladder 20 to expand (expansion structure); when the control handle 30 pushes the inner tube 11 outward, the expansion medium in the bladder 20 is discharged through the medium channel, causing the bladder 20 to contract (retraction structure); the inner tube 11 passes through the injection chamber 40 and the sealing element 50, and the sealing element 50 continues to maintain a seal during the axial movement of the inner tube 11. In this way, during multiple ablation operations, the combination of the injection chamber 40 and the seal 50 effectively prevents leakage of the medium from the gap between the inner tube 11 and the injection chamber 40. This design ensures that while the movement of the inner tube 11 controls the state of the capsule 20, the relative movement between the inner tube 11 and the injection chamber 40 does not compromise the seal. That is, the movement of the inner tube 11 causes the capsule 20 to expand and contract. The injection chamber 40 and the seal 50 are located outside the inner tube 11, so they do not affect the movement of the inner tube 11 and change the medium volume inside the capsule 20 along with the movement of the inner tube. In other words, the movement of the inner tube 11 and the expansion and contraction of the capsule 20 can be independent and parallel processes. With this structure, the inner tube 11 can move smoothly while the capsule 20 can maintain stable pressure. Thus, the deformation adjustment and sealing stability of the catheter capsule 20 are taken into account during multiple operations. This not only avoids safety hazards and extends the service life of the device, but also allows the operator to accurately control the state of the capsule 20 and achieve better ablation results.

[0055] In some embodiments, the easily operable catheter device further includes a sleeve 60, which is movably embedded in the fixing hole of the seal 50. The sleeve 60 is sleeved outside the inner tube 11, and the hardness of the sleeve 60 is higher than that of the inner tube 11, such as the sleeve 60 being a stainless steel tube. One end of the sleeve 60 is disposed in the injection chamber 40, and the other end of the sleeve 60 passes through the seal 50 and is connected to the control component 32.

[0056] In this way, the seal 50 only slides against the outer surface of the high-hardness sleeve 60, avoiding direct friction between the flexible inner tube 11 and the fixing hole of the seal 50. This extends the service life of the seal 50 and prevents the flexible inner tube 11 from moving synchronously with its proximal end due to excessive friction between it and the fixing hole of the seal 50, which would reduce the motion transmission ratio. Simultaneously, the greater hardness and rigidity of the sleeve 60 provides stable axial guidance for the inner tube 11, suppressing bending and wobbling during the pushing and pulling process.

[0057] In some embodiments, in addition to the above-described method of adding a sleeve 60, the structure of the inner tube 11 can be improved so that at least a portion of the structure of the inner tube 11 maintains a certain degree of rigidity. Specifically, the inner tube 11 includes a hardened section, one end of which is disposed within the injection cavity 40, and the other end of which passes through the fixing hole of the seal 50 and is connected to the control assembly 32.

[0058] To facilitate the axial movement of the inner tube 11, the control handle 30 is provided with a sliding groove. The control component 32 includes an operating member 321, which passes through the sliding groove and is connected to the sleeve 60 or the hardened section. The operating member 321 is used to drive the inner tube 11 to move axially relative to the outer tube 12.

[0059] The sliding groove provides a linear guide of fixed length for the operating member 321. The operating member 321 can be rigidly connected to the sleeve 60 (or hardened section) through the connector 322. The operating member 321 can be a toggle, so that the toggle force of the finger or thumb can be directly and without delay converted into the axial displacement of the inner tube 11, ensuring that the forward and backward stroke of the inner tube 11 corresponds one-to-one with the scale or displacement indication on the control handle 30, thereby improving the control accuracy.

[0060] In addition, the control handle 30 also includes a handle housing 31, a sliding groove is provided on the handle housing 31, the handle housing 31 also has an inner cavity 311 and a mounting port 312 communicating with the inner cavity 311. The mounting port 312 is located at the distal end of the handle housing 31 and is used to install the proximal end of the outer tube 12. The injection chamber 40 and the sealing element 50 are both accommodated in the inner cavity 311. It is understandable that... Figure 1 and 2 In the specific embodiment shown, the operating element 321 is located in the middle of the handle housing 31. In actual design, the operating element 321 can also be arranged at the tail end of the handle housing 31, that is, the proximal end of the handle housing 31. The middle of the handle housing 31 can be provided with a knob or the like for controlling the bending and turning of the distal end of the catheter assembly 10. The specific arrangement can be made by those skilled in the art according to actual needs. Various positional arrangements are not listed or illustrated one by one and do not exceed the protection scope of this application.

[0061] In some embodiments, such as Figure 5 and 6 As shown, the seal 50 is an integrally formed elastomer, such as an elastomer integrally injection molded from rubber material. The seal 50 includes a sealing body 51, a sealing outer ring 52, a sealing inner ring 53, and a transition portion 54.

[0062] The outer sealing ring 52 and the inner sealing ring 53 are both connected to the side of the sealing body 51 facing the injection cavity 40. The radial dimension of the outer sealing ring 52 gradually increases in the direction away from the sealing body 51, and the radial dimension of the inner sealing ring 53 gradually decreases in the direction away from the sealing body 51. The outer sealing ring 52 abuts against the inner wall of the injection cavity 40 (and can be further connected by adhesive), and the inner sealing ring 53 abuts against the outer wall of the hardened section of the sleeve 60 or the inner tube 11. The transition part 54 is a deformable area between the outer sealing ring 52 and the inner sealing ring 53.

[0063] As can be seen, the radial dimension of the outer sealing ring 52 gradually increases away from the sealing body 51, while the radial dimension of the inner sealing ring 53 gradually decreases, thus forming a V-shaped or trumpet-shaped elastic lip structure. This structure generates a bidirectional expansion force when the inner tube 11 is pushed, which can automatically compensate for the increase in gap caused by temperature changes, material aging, or wear, ensuring long-term reliable sealing performance and significantly extending the service life of the seal 50. At the same time, the transition portion 54, as a deformable area, can provide elastic buffering when the sleeve 60 moves axially, further reducing push-pull resistance and improving the handling feel.

[0064] For example, the outer sealing ring 52 has an outer ring protrusion 521 that protrudes toward the inner wall of the injection cavity 40, and the outer ring protrusion 521 abuts against the inner wall of the injection cavity 40. The inner sealing ring 53 has an inner ring protrusion 531 that protrudes toward the outer wall of the hardened section of the sleeve 60 or the inner tube 11, and the inner ring protrusion 531 abuts against the outer wall of the sleeve 60 or the hardened section.

[0065] In this way, the seal 50 is injection molded from rubber in one piece, making the sealing body 51, outer sealing ring 52, inner sealing ring 53, and transition portion 54 a continuous, seamless elastomer. Simultaneously, the outer ring protrusion 521 and the inner wall of the injection cavity 40, and the inner ring protrusion 531 and the outer wall of the sleeve 60 (or hardened section) both form a radial interference fit, creating a double independent sealing ring band. This ensures zero leakage even under positive or negative pressure conditions, maintaining sealing stability after more than 20 expansions and contractions of the bladder.

[0066] Of course, depending on actual needs, both the outer ring protrusion 521 and the inner ring protrusion 531 can be configured to achieve sealing of the corresponding components through local line contact. This configuration helps to reduce the contact area and lower frictional resistance.

[0067] In some embodiments, the easy-to-operate catheter device further includes a limiting structure 70, which includes a limiting protrusion 72 and a limiting member 71 that engages with the limiting protrusion 72. The limiting member 71 is connected to one of the inner tube 11 and the operating handle 30, and the limiting protrusion 72 is connected to the other.

[0068] For example, such as Figure 3 As shown, the limiting member 71 can be connected to the sleeve 60 outside the inner tube 11, and the limiting protrusion 72 is connected to the handle housing 31 of the control handle 30.

[0069] Furthermore, the limiting member 71 includes a plurality of limiting grooves distributed along the axial direction (catheter axial direction), which limit the movement of the limiting member 71 between the first position and the second position. In conjunction with some other embodiments, the limiting grooves and sliding grooves can be used together to limit the axial movement range of the inner tube 11 relative to the outer tube 12. For example, the sliding groove is used to limit the start and end points of the movement of the inner tube 11 relative to the outer tube 12 (such as the first position and the second position), so that the radial dimensions of the bladder 20 are different. The plurality of limiting grooves may include start and end limiting grooves corresponding to the first position and the second position, respectively. Of course, in addition to adjusting the inner tube to alternate between the first and second positions to provide the operator with support for the cyst 20 to be in the inflated or retracted configuration, this application also includes some other feasible implementation methods. For example, the limiting groove can cooperate with the limiting member 71 to keep the inner tube 11 in other preset positions between the first and second positions. The starting and stopping limits of the movement of the inner tube are achieved by the sliding groove. Having more intermediate limiting states is beneficial for the operator to adjust the maximum radial dimension of the cyst 20 in the inflated configuration according to the actual physiological structure of the patient, so as to fit the target tissue with a more suitable shape and size.

[0070] With this configuration, the inner tube 11 (or sleeve 60) can be locked in the corresponding first position, second position and intermediate position by the limiting protrusion 72 being engaged in different limiting grooves, so as to achieve precise positioning of the push-pull stroke and multiple tactile feedback; at the same time, the limiting protrusion 72 forms a mechanical hard limit at both ends of the limiting groove to prevent the inner tube 11 from overtraveling and avoid damage to tissue at the distal end of the catheter.

[0071] During operation, when the operating component 321 is pushed backward, the inner tube 11 moves backward, that is, the distal end of the capsule 20 retracts backward. When the predetermined position is reached, the radial expansion range of the capsule 20 is correspondingly determined. As the inner tube 11 drives the capsule 20 to retract, the medium channel simultaneously injects an expansion medium into the capsule 20, causing the capsule 20 to expand while retracting backward until the capsule 20 reaches the predetermined diameter. At this point, the injection of the expansion medium stops, and the capsule 20 is in an expanded structure. The capsule 20 remains in an expanded structure to maintain the stability of the outer surface of the capsule 20 in close contact with the tissue. When the capsule 20 needs to shrink, similarly, the pressure pump is connected to the medium pipeline connector 81 to aspirate the filling medium in the capsule 20. At this time, the operating member 321 needs to be pushed forward. When the limited position is reached, after the filling medium in the capsule 20 is completely aspirated, the capsule 20 is in a fully contracted structure. The capsule 20 continues to be in a contracted structure in order to maintain the overall small outer diameter of the capsule 20 so that the distal end of the catheter device can be retracted into the protective tube and used to switch the ablation position.

[0072] Specifically, the limiting member 71 is an integrally formed elastic body. The limiting member 71 has a first piece and a second piece that are parallel to each other. The first piece is provided with a plurality of limiting grooves distributed along the axial direction. The second piece is fixedly connected to the inner tube 11 or the control handle 30. The first piece and the second piece are connected on one side and have a variable gap on the other side.

[0073] With this configuration, when the push-pull operation component 321 is used, the limiting protrusion 72 pushes the first piece to produce elastic deformation, automatically shifting to the next groove; after releasing, the elastic restoring force causes the limiting protrusion 72 to re-engage with the limiting groove to achieve locking, realizing a tool-free and spring-free click-to-shift feel, which not only provides a clear feel but also simplifies the structure.

[0074] In some embodiments, the number of seals 50 is at least two, each seal 50 is continuously arranged along the axial direction, and each seal 50 has a lubricating isolation layer on its inner side. The lubricating isolation layer may be a hydrophobic grease, which functions to lubricate and isolate liquids.

[0075] As can be seen, at least two seals 50 arranged continuously along the axial direction form multiple independent sealing rings. Even if the near-end seal 50 fails due to wear or foreign matter, the far-end seal 50 can still ensure that the injection chamber 40 is completely isolated from the outside, achieving multi-stage sealing and significantly reducing the risk of leakage of the filling medium. At the same time, the inner side of each seal 50 is covered with a lubricating isolation layer (such as a silicone oil layer or a hydrophobic polymer film), which transforms the dry friction between the sleeve 60 (or hardened section) and the inner wall of the seal 50 into boundary lubrication friction, reducing the friction coefficient by more than 50%, significantly reducing the push-pull resistance, and preventing early wear of the seal 50, thus extending the overall service life.

[0076] In some embodiments, the catheter assembly 10 further includes a middle tube 13 disposed between the inner tube 11 and the outer tube 12. The proximal ends of the outer tube 12, the middle tube 13, and the inner tube 11 are arranged axially offset in sequence. The proximal end of the outer tube 12 is connected to the distal end of the control handle 30, the proximal end of the middle tube 13 communicates with the injection chamber 40, and the proximal end of the inner tube 11 is connected to the proximal end of the control handle 30. A medium channel is formed between the middle tube 13 and the inner tube 11, and an electrical connection channel is formed between the middle tube 13 and the outer tube 12. The electrical connection channel and the medium channel are separated from each other. The electrical connection channel is used for wires to be connected to a plurality of electrodes 21 disposed on the capsule 20.

[0077] In this embodiment, the inner tube 11, the middle tube 13, and the outer tube 12 are coaxially sleeved from the inside to the outside, and their proximal ends are axially staggered in sequence to form a stepped distribution of segmented functional interfaces:

[0078] The proximal end of the outer tube 12 is fixed to the distal end of the control handle 30, such as by connecting it to the mounting port 312 of the control handle 30, to provide overall mechanical support;

[0079] The proximal end of the middle tube 13 is connected to the injection cavity 40, forming an independent media channel for delivering / absorbing the inflation medium to the capsule 20;

[0080] The inner tube 11 extends to the proximal end of the control handle 30 and is directly connected to the control component 32 to achieve axial forward and backward control.

[0081] It is important to emphasize that the three channels formed by the three tubes are independent of each other and do not interfere with each other. That is, the medium channel and the electrical connection channel are physically isolated by the middle tube 13, preventing the expansion medium from seeping into the conductor area. This can significantly reduce the risk of short circuits or corrosion, improve long-term electrical reliability, and achieve integrated mechanical transmission, medium delivery and electrical signal transmission. The channel inside the inner tube 11 can be used to put in guide wires, catheters and contrast fluid, etc., and is isolated from other channels by the barrier formed by the inner tube 11.

[0082] In some embodiments, the control handle 30 has an inner cavity arranged along the axial direction. The control handle 30 also has an electrical connection line 90 and a medium conduit 80 respectively disposed on both sides of the inner cavity. The electrical connection line 90 communicates with an electrical connection channel, and the medium conduit 80 communicates with a medium channel. Simultaneously, the proximal end of the control handle 30 has an inner tube interface communicating with the inner cavity. The control handle 30 also has a first opening 313 and a second opening 314 symmetrically arranged relative to the inner tube interface. The first opening 313 connects to the medium conduit, and the second opening 314 connects to the electrical connection line.

[0083] It should be noted that, since the control handle 30 runs centrally along the axis of the inner lumen, the electrical connection line 90 and the media line 80 are distributed on both sides of this inner lumen. Furthermore, the electrical connection line 90 and the media line 80 are of similar weight and arranged horizontally or vertically, ensuring that the overall center of gravity of the handle is essentially on its geometric axis. This prevents eccentric torque when the surgeon rotates or pulls the handle, reducing the likelihood of kinking that could obstruct media transmission or interrupt electrical signals. The control feels balanced, reducing fatigue during prolonged operation and improving surgical precision and safety.

[0084] The ablation device provided in this application includes a media conduit connector 81, an electrical connection connector 91, a media circulation device, a main unit, and the catheter device described in the above embodiments. The media circulation device is connected to the media conduit 80 of the catheter device via the media conduit connector 81, and the main unit is connected to the electrical connection line 90 of the catheter device via the electrical connection connector 91. The inner tube interface of the catheter device allows the mapping catheter and / or contrast fluid to enter. Thus:

[0085] On the media side: The media circulation device connects to the media line 80 within the easily operable conduit device via the media line connector 81, forming a closed circulation or infusion channel. When the bladder 20 needs to be expanded, the inflation medium is injected into the media line 80 through the tee. The media line 80 is positioned on the right side of the handle, and a fixed locking mechanism ensures that the media line 80 will not move. The medium travels directly along the media line 80 to the injection chamber 40. The seal 50 in the injection chamber 40 prevents the inflation medium from flowing towards the handle, allowing the inflation medium to enter the bladder 20 only through the gap between the inner tube 11 and the middle tube 13, thereby inflating the bladder 20.

[0086] On the electrical side: The main unit connects to the electrical connection line 90 within the easily operable catheter device via an electrical connection connector 91, providing ablation energy and signal circuits to the multiple electrodes 21 on the capsule 20. The electrical connection line 90 is installed on the left side of the handle, allowing the wires to reach the electrodes 21 of the capsule 20 along the gap between the outer tube 12 and the middle tube 13, thus establishing a connection with the electrodes 21 and enabling the transmission of ablation energy or signals.

[0087] On the device side: The proximal end of the easily maneuverable catheter device has an independently open inner tube interface, allowing the insertion of mapping catheters, contrast fluid, or other diagnostic / therapeutic devices, enabling integrated "ablation-mapping-contrast" operations without the need to replace the handle or re-establish the channel.

[0088] The above arrangement, through the rational planning of the conduits and connected devices, avoids the cascading damage caused by water leakage, seepage, and electrical leakage, thereby improving safety and preventative measures to facilitate the implementation of treatment or diagnosis.

[0089] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0090] The above provides a detailed description of the easy-to-operate catheter device and ablation equipment provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A conveniently operable catheter device, characterized in that, include: A catheter assembly includes an inner tube, an outer tube, and a balloon body, wherein the gap between the inner tube and the outer tube forms a media channel, the distal end of the balloon body is connected to the inner tube, and the proximal end of the balloon body is connected to the outer tube; A control handle, connected to the proximal end of the catheter assembly, includes a control component connected to the inner tube, which is axially movable relative to the outer tube under the action of the control component to adjust the cyst body to switch between a contraction configuration and an inflation configuration. An injection chamber is located inside the control handle, the injection chamber is connected to the proximal end of the medium channel, and the injection chamber is sleeved on the outside of the inner tube; A sealing element is provided to seal the injection cavity and has a fixing hole, which accommodates the axial movement of the inner tube relative to the injection cavity.

2. The easily operable catheter device as described in claim 1, characterized in that, The catheter device further includes a sleeve movably embedded in the seal, the sleeve being sleeved outside the inner tube, and the hardness of the sleeve being higher than that of the inner tube. One end of the sleeve is disposed in the injection cavity, and the other end of the sleeve passes through the seal and is connected to the control component. And / or, the inner tube includes a hardened section, one end of which is disposed within the injection cavity, and the other end of which passes through the seal and is connected to the control assembly.

3. The easily operable catheter device as described in claim 2, characterized in that, The control handle has a sliding groove, and the control component includes an operating member. The operating member passes through the sliding groove and is connected to the sleeve or the hardened section. The operating member is used to drive the inner tube to move axially relative to the outer tube.

4. The easily operable catheter device as described in claim 2, characterized in that, The sealing element is an integrally formed elastic body, and the sealing element includes a sealing body, a sealing outer ring, a sealing inner ring, and a transition portion; Both the outer sealing ring and the inner sealing ring are connected to the side of the sealing body facing the injection cavity. The radial dimension of the outer sealing ring gradually increases in the direction away from the sealing body, and the radial dimension of the inner sealing ring gradually decreases in the direction away from the sealing body. The outer sealing ring is used to abut against the inner wall of the injection cavity, the inner sealing ring is used to abut against the outer wall of the sleeve or the hardened section, and the transition portion is the deformable area between the outer sealing ring and the inner sealing ring.

5. The easily operable catheter device as described in claim 1, characterized in that, The catheter device further includes a limiting structure, which includes a limiting protrusion and a limiting member that engages with the limiting protrusion. The limiting member is connected to one of the inner tube and the control handle, and the limiting protrusion is connected to the other. The limiting member includes a plurality of limiting grooves distributed along the axial direction, the limiting grooves restricting the movement of the limiting member between a first position and a second position.

6. The easily operable catheter device as described in claim 5, characterized in that, The limiting member is an integrally formed elastic body. The limiting member has a first piece and a second piece parallel to the axial direction. The first piece is provided with a plurality of limiting grooves distributed along the axial direction. The second piece is fixedly connected to the inner tube or the control handle. The first piece and the second piece are connected to one side and have a variable gap on the other side.

7. The easily operable catheter device as described in claim 1, characterized in that, The number of the seals is at least two, each seal is continuously arranged along the axial direction, and each seal has a lubricating isolation layer on its inner side.

8. The easily operable catheter device as described in any one of claims 1-7, characterized in that, The catheter assembly also includes a middle tube disposed between the inner tube and the outer tube. The proximal ends of the outer tube, the middle tube, and the inner tube are arranged axially offset in sequence. The proximal end of the outer tube is connected to the distal end of the control handle, the proximal end of the middle tube communicates with the injection cavity, and the proximal end of the inner tube is connected to the proximal end of the control handle. The medium channel is formed between the middle tube and the inner tube, and the electrical connection channel is formed between the middle tube and the outer tube. The electrical connection channel and the medium channel are separated from each other, and the electrical connection channel is used for wires to be connected to multiple electrodes disposed on the capsule.

9. The easily operable catheter device as described in claim 8, characterized in that, The control handle has an inner cavity arranged along the axial direction. The control handle also has electrical connection lines and medium pipelines respectively arranged on both sides of the inner cavity. The electrical connection lines are connected to the electrical connection channel, and the medium pipelines are connected to the medium channel. The control handle has an inner tube interface that communicates with the inner tube cavity at its proximal end. The control handle also has a first opening and a second opening symmetrically arranged relative to the inner tube interface. The first opening is connected to the medium pipeline, and the second opening is connected to the electrical connection line.

10. An ablation device, characterized in that, The device includes a media pipeline connector, an electrical connection connector, a media circulation device, a main unit, and a catheter device as described in any one of claims 1-9. The media circulation device is connected to the media pipeline of the catheter device through the media pipeline connector. The main unit is connected to the electrical connection line of the catheter device through the electrical connection connector. The inner tube interface of the catheter device allows the mapping catheter and / or contrast fluid to enter.

Images