An ablation catheter based on a high-efficiency sealing handle

Abstract

This application discloses an ablation catheter based on a high-efficiency sealing handle, comprising a catheter body and a handle. The catheter body has an electrode at its front end. The catheter body also has multiple pull-wire cavities and multiple lead wire cavities. Each pull-wire cavity contains a pull wire, and each lead wire cavity contains an electrode lead wire. The handle includes a housing and a sealing mechanism. In this ablation catheter, both the electrode lead wire and the pull wire have an insulating layer, thereby increasing the insulation capacity of the electrode lead wire and the pull wire and preventing puncture. The handle is doubly sealed to the catheter body by a first sealing ring and a second sealing ring, and further sealed by the sealing mechanism against the proximal ends of the pull-wire cavity and the electrode lead wire cavity, effectively preventing bleeding at the handle. Furthermore, the front end of the catheter body can be bent using an adjustment mechanism.

Description

Technical Field

[0001] This utility model relates to the field of ablation catheters, and more specifically, to an ablation catheter based on a high-efficiency sealing handle. Background Technology

[0002] Due to the stringent requirements of cardiac electrophysiology surgery, modern atrial fibrillation / ventricular tachycardia ablation procedures commonly employ high-energy pulsed electric fields (PFA) or radiofrequency energy. Energy is conducted and the ablation catheter is used for tissue localization, with operating voltages often reaching 1000-3000V. The ablation catheter consists of a catheter body and a handle. A pull wire connects the catheter body and the handle, allowing adjustment of the distal end of the catheter body to better align with the patient tissue.

[0003] Traditional ablation catheters operate under high voltage, and the electrode wires often have inadequate insulation, making them susceptible to breakdown if the wires are conductive. Furthermore, existing ablation catheters suffer from poor sealing between the handle and the catheter body, leading to easy bleeding. While CN119950017A discloses a handle and ablation catheter with multi-layered sealing gaskets, it fails to address the long-term sealing issue of dynamic moving parts (such as the adjusting wire) and lacks high-voltage insulation design. Another high-pressure-resistant ablation catheter, CN216090750U, focuses on electrode insulation, but its handle sealing performance is relatively weak, failing to block blood penetration. Utility Model Content

[0004] The present invention aims to overcome the defects of the prior art and provide an ablation catheter based on a high-efficiency sealing handle.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an ablation catheter based on a high-efficiency sealing handle, comprising a catheter body and a handle. The front end of the catheter body has an electrode, and the catheter body has a pull ring. The catheter body also has multiple pull wire cavities and multiple lead wire cavities. Each pull wire cavity contains a pull wire, and each lead wire cavity contains an electrode lead wire. The front end of the pull wire is fixedly connected to the pull ring. The number of electrodes and electrode lead wires is equal and they correspond one-to-one. The proximal ends of the pull wire cavity and the lead wire cavity are both frustoconical. The handle includes a housing and a sealing mechanism. The housing includes a front end shell, a rear end shell, a surrounding shell connecting the front end shell and the rear end shell, and an annular partition fixedly connected to the surrounding shell. The catheter body passes through the front end shell and the annular partition. A first sealing ring is fixedly connected between the catheter body and the front end shell. A fixing ring is fixedly connected to the annular partition. A second sealing ring is fixedly connected between the fixing ring and the catheter body.

[0006] Furthermore, the sealing mechanism includes an annular mounting plate, a plurality of first abutting sealing blocks fixedly connected to the annular mounting plate, and a plurality of second abutting sealing blocks fixedly connected to the annular mounting plate. The first abutting sealing block includes a cylindrical portion and a frustoconical portion, and has a first through hole through which a pull wire passes. The second abutting sealing block includes a cylindrical portion and a frustoconical portion, and has a second through hole through which an electrode wire passes.

[0007] Furthermore, the fixing ring has multiple fixing tubes with internal threads, and the annular mounting plate is fixedly connected to the fixing tubes by fixing bolts; the annular mounting plate has multiple first through holes through which the pull wire passes and multiple second through holes through which the electrode wire passes.

[0008] Thus, the first and second sealing blocks can respectively abut and seal against the proximal end of the wire drawing cavity and the proximal end of the electrode lead cavity.

[0009] Furthermore, the annular mounting plate has multiple mounting through holes that mate with fixing bolts.

[0010] Thus, the fixing bolt passes through the mounting hole and is fixedly connected to the fixing pipe.

[0011] Furthermore, the number of fixed tubes is greater than or equal to four and they are distributed in a ring with equal spacing.

[0012] This allows the sealing mechanism to be stably fixed.

[0013] Furthermore, the number of electrode wires and wire cavities is greater than or equal to 4; the number of electrode wires and second through holes is equal and they correspond one-to-one; the number of pull wires and first through holes is equal and they correspond one-to-one; the number of pull wires is two.

[0014] Furthermore, the annular mounting plate has multiple first mounting rings with external threads and multiple second mounting rings with external threaded holes. The number of first mounting rings and first through holes are equal and correspond one-to-one. Each first mounting ring surrounds a first through hole. The number of second mounting rings and second through holes are equal and correspond one-to-one. Each second mounting ring surrounds a second through hole. A first sealing ring is installed inside each first mounting ring, and a first tightening cap is installed at each first mounting ring. The first tightening cap can be installed at the first mounting ring and compress the first sealing ring. A second sealing ring is installed inside each second mounting ring, and a second tightening cap is installed at each second mounting ring. The second tightening cap can be installed at the second mounting ring and compress the second sealing ring.

[0015] Thus, under the action of the first and second tightening caps, the pull wire abuts against the inner side of the first sealing ring, and the electrode wire abuts against the inner side of the second sealing ring, and the degree of abutment can be adjusted.

[0016] Furthermore, the first sealing block, the second sealing block, the first sealing ring, and the second sealing ring are all made of rubber material.

[0017] Furthermore, the electrode wire includes a wire body and a wire insulation layer covering the wire body; the pull wire includes a pull wire body and a pull wire insulation layer covering the pull wire body.

[0018] Furthermore, the insulating layer includes a silicone rubber insulating layer body and a polyetheretherketone coating covering the silicone rubber insulating layer body.

[0019] This increases the insulation strength of the electrode wires and pull wires, preventing them from being broken down.

[0020] Furthermore, a circuit board is installed inside the handle, and all electrode wires are electrically connected to the circuit board, which is also connected to a cable unit.

[0021] Furthermore, the cable unit passes through the proximal end of the handle, and an end rubber ring is installed between the cable unit and the handle.

[0022] This increases the sealing performance between the cable unit and the handle.

[0023] Furthermore, an adjustment mechanism is also installed at the handle. The adjustment mechanism includes a first fixed shaft fixed to the housing and a rotating disk installed on the first fixed shaft. The rotating disk has two anchoring units, and the proximal ends of two pull lines are respectively fixedly connected to the two anchoring units. The housing also has a through groove, and a circular adjustment knob capable of driving the rotating disk to rotate is installed in the through groove.

[0024] Furthermore, the first fixed shaft has a first limiting plate and a second limiting plate, the rotating disk has a first shaft hole through which the first fixed shaft passes and is located between the first limiting plate and the second limiting plate; the through groove has a second fixed shaft, and the adjusting knob has a second shaft hole through which the second fixed shaft passes.

[0025] Furthermore, the circumferential surface of the rotating disk has a plurality of first protrusions, and the circumferential surface of the adjusting knob has a plurality of second protrusions.

[0026] By rotating the adjustment knob, the first protrusion engages with the second protrusion, causing the rotating disk to rotate.

[0027] Furthermore, the anchoring unit includes a protrusion fixed to the rotating disk, the protrusion having a through hole through which a pull wire passes, and a locking bolt for fixing the pull wire and the protrusion together; the line connecting the two anchoring units intersects the axis of the rotating disk.

[0028] Furthermore, one side of the rotating disk has multiple strip-shaped protrusions, and the housing is connected by a spring to an abutment ring capable of abutting the strip-shaped protrusions.

[0029] This provides a damping effect, preventing accidental activation of the adjustment knob from causing the disc to rotate.

[0030] Beneficial effects:

[0031] 1. The ablation catheter of this application has an insulating layer on the outside of the electrode wire and the pull wire, thereby increasing the insulation capacity of the electrode wire and the pull wire and preventing them from being broken down.

[0032] 2. The ablation catheter of this application has a double seal between the handle and the catheter body through a first sealing ring and a second sealing ring, and a sealing mechanism that abuts against the proximal end of the pull wire cavity and the electrode lead cavity, thereby effectively preventing bleeding at the handle.

[0033] 3. The ablation catheter of this application can be bent at the front end of the catheter body through the adjustment mechanism, so as to flexibly adjust the shape of the front end of the catheter according to actual needs. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of an ablation catheter;

[0035] Figure 2 This is a first-person perspective diagram of component separation.

[0036] Figure 3 This is a magnified view of region A;

[0037] Figure 4 This is a magnified view of region B.

[0038] Figure 5 This is a second-view diagram illustrating the separation of components.

[0039] Figure 6 This is a magnified view of region C;

[0040] Figure 7 This is a magnified view of region D;

[0041] Figure 8 This is a schematic diagram showing the connection between the sealing mechanism and the retaining ring;

[0042] Figure 9 This is a magnified view of region E.

[0043] Figure 10 This is a magnified view of region F;

[0044] Figure 11 for Figure 8 Another perspective illustration;

[0045] Figure 12 This is a magnified view of region G.

[0046] For the sake of brevity, Figures 2-12 In the diagram, a portion of the housing, the proximal end of the pull wire, the proximal end of the electrode wire, the connection between the proximal end of the pull wire and the anchoring unit, and the connection between the proximal end of the electrode wire and the circuit board are omitted and not shown.

[0047] Explanation of reference numerals in the attached drawings: 1.1 Pull wire cavity; 1.2 Wire cavity; 1.3 First sealing ring; 1.4 Second sealing ring; 2 Pull wire; 3 Electrode wire; 4.1 Front end shell; 4.2 Rear end shell; 4.3 Enclosing shell; 4.4 Annular partition; 4.5 Adjustment knob; 4.5.1 Second protrusion; 4.6 End rubber ring; 5 Fixing ring; 6.1 Annular mounting plate; 6.2 First abutting sealing block; 6.3 Second abutting sealing block; 6.4 Fixing tube; 6.5 First mounting ring; 6.6 First sealing ring; 6.7 First sealing ring; 6.8 First sealing ring; 6.9 First sealing ring; 1.0 ... 6.5.1 Sealing ring; 6.5.2 First tightening cap; 6.6 Second mounting ring; 6.6.1 Second sealing ring; 6.6.2 Second tightening cap; 7 Fixing bolt; 8 Circuit board; 8.1 Cable unit; 9.1 First fixing shaft; 9.2 Rotating disk; 9.2.1 First protrusion; 9.3 Anchoring unit; 9.3.1 Through hole; 9.3.2 Locking bolt; 9.4 First limiting plate; 9.5 Second limiting plate; 9.6 Strip protrusion; 9.7 Spring; 9.8 Abutment ring. Detailed Implementation

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0049] This utility model provides an ablation catheter based on a high-efficiency sealing handle, as shown in the figure. It includes a catheter body and a handle. The catheter body has an electrode at its front end and a pull ring inside. The catheter body also has multiple pull-wire cavities 1.1 and multiple lead wire cavities 1.2. Each pull-wire cavity 1.1 contains a pull wire 2, and each lead wire cavity 1.2 contains an electrode lead wire 3. The front end of the pull wire 2 is fixedly connected to the pull ring. The number of electrodes and electrode lead wires 3 is equal and they correspond one-to-one. The proximal ends of both the pull-wire cavity 1.1 and the lead wire cavity 1.2 are frustoconical. The handle includes a housing and a sealing mechanism. The housing includes a front housing 4.1, a rear housing 4.2, a surrounding housing 4.3 connecting the front housing 4.1 and the rear housing 4.2, and an annular partition 4.4 fixedly connected to the surrounding housing 4.3. The catheter body passes through the front housing 4.1 and the annular partition 4.4. A first seal is fixedly connected between the catheter body and the front housing 4.1. Ring 1.3, the annular partition 4.4 is fixedly connected to a fixing ring 5, and a second sealing ring 1.4 is fixedly connected between the fixing ring 5 and the conduit body; the sealing mechanism includes an annular mounting plate 6.1, a plurality of first abutting sealing blocks 6.2 fixedly connected to the annular mounting plate 6.1, and a plurality of second abutting sealing blocks 6.3 fixedly connected to the annular mounting plate 6.1. The first abutting sealing block 6.2 includes a cylindrical part and a frustoconical part, and has a first through hole through which the pull wire 2 passes. The second abutting sealing block 6.3 includes a cylindrical part and a frustoconical part, and has a second through hole through which the electrode wire 3 passes. The fixing ring 5 has a plurality of fixing tubes 6.4 with internal threads, and the annular mounting plate 6.1 is fixedly connected to the fixing tubes 6.4 by fixing bolts 7; the annular mounting plate 6.1 has a plurality of first through holes through which the pull wire 2 passes and a plurality of second through holes through which the electrode wire 3 passes.

[0050] The number of fixed tubes 6.4 is greater than or equal to 4 and they are distributed in a ring with equal spacing. The number of electrode wires 3 and wire cavities 1.2 is greater than or equal to 4; the number of electrode wires 3 and the number of second through holes are equal and they correspond one-to-one; the number of pull wires 2 and the number of first through holes are equal and they correspond one-to-one; the number of pull wires 2 is two. The annular mounting plate 6.1 has multiple first mounting rings 6.5 with external threads and multiple second mounting rings 6.6 with external threaded holes. The number of first mounting rings 6.5 and first through holes are equal and correspond one-to-one. Each first mounting ring 6.5 surrounds a first through hole. The number of second mounting rings 6.6 and second through holes are equal and correspond one-to-one. Each second mounting ring 6.6 surrounds a second through hole. Each first mounting ring 6.5 has a first sealing ring 6.5.1 installed inside and a first tightening cap 6.5.2 installed at each first mounting ring 6.5. The first tightening cap 6.5.2 can be installed at the first mounting ring 6.5 and compress the first sealing ring 6.5.1. Each second mounting ring 6.6 has a second sealing ring 6.6.1 installed inside and a second tightening cap 6.6.2 installed at each second mounting ring 6.6. The second tightening cap 6.6.2 can be installed at the second mounting ring 6.6 and compress the second sealing ring 6.6.1. The first sealing block 6.2, the second sealing block 6.3, the first sealing ring 6.5.1, and the second sealing ring 6.6.1 are all made of rubber material; the electrode wire 3 includes a wire body and a wire insulation layer covering the wire body; the pull wire 2 includes a pull wire body and a pull wire insulation layer covering the pull wire body.

[0051] A circuit board 8 is installed inside the handle, and all electrode wires 3 are electrically connected to the circuit board 8. The circuit board 8 is also connected to a cable unit 8.1. An adjustment mechanism is also installed at the handle. The adjustment mechanism includes a first fixed shaft 9.1 fixed to the housing and a rotating disk 9.2 installed on the first fixed shaft 9.1. The rotating disk 9.2 has two anchoring units 9.3, and the proximal ends of the two pull wires 2 are respectively fixedly connected to the two anchoring units 9.3. The housing also has a through groove, and a circular adjustment knob 4.5 capable of driving the rotating disk 9.2 to rotate is installed in the through groove. The first fixed shaft 9.1 has a first limiting plate 9.4 and a second limiting plate 9.5. The rotating disk 9.2 has a first shaft hole through which the first fixed shaft 9.1 passes and is located between the first limiting plate 9.4 and the second limiting plate 9.5. The through slot has a second fixed shaft, and the adjusting knob 4.5 has a second shaft hole through which the second fixed shaft passes. The circumferential surface of the rotating disk 9.2 has a plurality of first protrusions 9.2.1, and the circumferential surface of the adjusting knob 4.5 has a plurality of second protrusions 4.5.1. The anchoring unit 9.3 includes a protrusion fixed to the rotating disk 9.2. The protrusion has a through hole 9.3.1 through which the pull wire 2 passes, and the protrusion has a locking bolt 9.3.2 that fixes the pull wire 2 and the protrusion together. The line connecting the two anchoring units intersects the axis of the rotating disk 9.2. The rotating disk 9.2 has multiple strip-shaped protrusions 9.6 on one side, and the housing is connected by a spring 9.7 to an abutment ring 9.8 that can abut against the strip-shaped protrusions 9.6.

[0052] Working principle: The ablation catheter of this application has an insulating layer on the outside of the electrode wire and the pull wire, thereby increasing the insulation capacity of the electrode wire and the pull wire and preventing them from being broken down.

[0053] The annular mounting plate of this application is fixedly connected to the fixing tube by fixing bolts, so that the first and second sealing blocks abut against and seal the proximal ends of the pull wire cavity and the electrode lead cavity, respectively. Under the action of the first and second tightening caps, the first and second sealing rings can be compressed so that the pull wire abuts against the inner side of the first sealing ring and the electrode lead abuts against the inner side of the second sealing ring. The degree of tightness can be adjusted by the first and second tightening caps. For the pull wire, the first tightening cap can be relatively loose, thus allowing a tight seal between the first sealing ring and the pull wire. Furthermore, under the adjustment mechanism, the pull wire can move relative to the first sealing ring. The handle and the catheter body are also doubly sealed by the first and second sealing rings.

[0054] In addition, the adjustment mechanism can rotate the rotating disc by turning the adjustment knob, so that one of the two pull lines can be used to release the line and the other to retract the line, thereby allowing the front end of the catheter body to be bent.

[0055] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present invention without departing from the scope defined by the claims.

Claims

1. An ablation catheter based on a high-efficiency sealing handle, characterized in that, The device includes a catheter body and a handle. The catheter body has an electrode at its front end and a pull ring inside. The catheter body also has multiple pull-wire cavities and multiple lead wire cavities. Each pull-wire cavity contains a pull wire, and each lead wire cavity contains an electrode lead wire. The front end of each pull wire is fixedly connected to the pull ring. The number of electrodes and electrode leads is equal and they correspond one-to-one. The proximal ends of both the pull-wire cavity and the lead wire cavity are frustoconical. The handle includes a housing and a sealing mechanism. The housing includes a front end housing, a rear end housing, a surrounding housing connecting the front end housing and the rear end housing, and an annular partition fixedly connected to the surrounding housing. The catheter body passes through the front end housing and the annular partition. A first sealing ring is fixedly connected between the catheter body and the front end housing. The annular partition is fixedly connected... The device includes a fixing ring, and a second sealing ring is fixedly connected between the fixing ring and the conduit body. The sealing mechanism includes an annular mounting plate, multiple first abutting sealing blocks fixedly connected to the annular mounting plate, and multiple second abutting sealing blocks fixedly connected to the annular mounting plate. The first abutting sealing block includes a cylindrical portion and a frustoconical portion, and has a first through hole through which a pull wire passes. The second abutting sealing block includes a cylindrical portion and a frustoconical portion, and has a second through hole through which an electrode wire passes. The fixing ring has multiple fixing tubes with internal threads, and the annular mounting plate is fixedly connected to the fixing tubes by fixing bolts. The annular mounting plate has multiple first through holes through which pull wires pass and multiple second through holes through which electrode wires pass.

2. The ablation catheter based on a high-efficiency sealing handle according to claim 1, characterized in that, The number of fixed tubes is greater than or equal to four and they are distributed in a ring with equal spacing.

3. The high-efficiency sealed handle based ablation catheter of claim 1, wherein, The number of electrode wires and wire cavities is greater than or equal to 4; the number of electrode wires and second through holes is equal and they correspond one-to-one; the number of pull wires and first through holes is equal and they correspond one-to-one; the number of pull wires is two.

4. The high-efficiency sealed handle based ablation catheter of claim 1, wherein, The annular mounting plate has multiple first mounting rings with external threads and multiple second mounting rings with external threaded holes. The number of first mounting rings and first through holes are equal and correspond one-to-one. Each first mounting ring surrounds a first through hole. The number of second mounting rings and second through holes are equal and correspond one-to-one. Each second mounting ring surrounds a second through hole. A first sealing ring is installed inside each first mounting ring, and a first tightening cap is installed at each first mounting ring. The first tightening cap can be installed at the first mounting ring and compress the first sealing ring. A second sealing ring is installed inside each second mounting ring, and a second tightening cap is installed at each second mounting ring. The second tightening cap can be installed at the second mounting ring and compress the second sealing ring.

5. The high-efficiency sealed handle-based ablation catheter of claim 4, wherein, The first sealing block, the second sealing block, the first sealing ring, and the second sealing ring are all made of rubber material; the electrode wire includes a wire body and a wire insulation layer covering the wire body; the pull wire includes a pull wire body and a pull wire insulation layer covering the pull wire body.

6. The high-efficiency sealed handle based ablation catheter of claim 1, wherein, The handle contains a circuit board, and all electrode wires are electrically connected to the circuit board. The circuit board is also connected to a cable unit.

7. The high-efficiency sealed handle based ablation catheter of claim 3, wherein, An adjustment mechanism is also installed at the handle. The adjustment mechanism includes a first fixed shaft fixed to the housing and a rotating disk installed on the first fixed shaft. The rotating disk has two anchoring units, and the proximal ends of two pull lines are respectively fixedly connected to the two anchoring units. The housing also has a through groove, and a circular adjustment knob capable of driving the rotating disk to rotate is installed in the through groove.

8. The ablation catheter based on a high-efficiency sealing handle according to claim 7, characterized in that, The first fixed shaft has a first limiting plate and a second limiting plate, and the rotating disk has a first shaft hole through which the first fixed shaft passes and is located between the first limiting plate and the second limiting plate; the through groove has a second fixed shaft, and the adjusting knob has a second shaft hole through which the second fixed shaft passes; the circumferential surface of the rotating disk has a plurality of first protrusions, and the circumferential surface of the adjusting knob has a plurality of second protrusions.

9. The high-efficiency seal-based handle-based ablation catheter of claim 7, wherein, The anchoring unit includes a protrusion fixed to the rotating disk, the protrusion having a through hole through which a pull wire passes, and a locking bolt at the protrusion for fixing the pull wire and the protrusion together; the line connecting the two anchoring units intersects the axis of the rotating disk.

10. The high-efficiency sealed handle based ablation catheter of claim 7, wherein, The rotating disk has multiple strip-shaped protrusions on one side, and the housing is connected by a spring to an abutment ring that can abut against the strip-shaped protrusions.

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