Attached cardiac pulsed electric field ablation catheter

By designing fastening components in the cardiac pulse electric field ablation catheter, the stability of the catheter connecting wire under high-frequency electrical pulses and mechanical vibration is solved, and the convenient separation and fixation of the catheter and the pulse conductor are achieved, improving the convenience of equipment use Sex and practicality.

CN222265377UActive Publication Date: 2024-12-31HANGZHOU KEJIA BIOTECHNOLOGY CO LTD
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Patent Information

Application Number
CN202420962019.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-07
Publication Date
2024-12-31
Estimated Expiration
2034-05-07

AI Technical Summary

Technical Problem

During the use of existing cardiac pulse electric field ablation catheters, the connecting wires need to withstand high-frequency electrical pulses and mechanical vibrations, resulting in unstable connections, making it difficult to separate the catheter from the pulse conductor, and the commonly used welding or fixed structures are inconvenient to operate.

Method used

A fit-fit cardiac pulse electric field ablation catheter is designed, and the fastening components include operating handles, connectors, mounting sleeves, connecting rods, fixing sleeves, rubber pads, insert rods, U-shaped frames, telescopic springs and other structures are adopted to tighten the structure. The solid assembly enables the fastening and convenient separation of pulse conductors.

Benefits of technology

It effectively avoids the disengagement of the catheter connecting wire during use, improves the convenience and practicality of operation, and facilitates the separation and fixation of the catheter and the pulse conductor.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a fitting type heart pulsed electric field ablation catheter which comprises a catheter body and a pulse wire, a plurality of ablation ridges are arranged in the catheter body, an ablation electrode is arranged at one end of each ablation ridge, and an operating handle is fixedly installed on one side of the catheter body. A connector is installed at the end, away from the catheter body, of the operating handle, the connector is connected with the pulse wire in a matched mode, a fastening assembly is arranged on the outer side of the operating handle and the outer side of the pulse wire, and the fastening assembly comprises an installation sleeve arranged on the side, close to the connector, of the outer portion of the operating handle in a sleeving mode; connecting rods are symmetrically hinged to the side, close to the pulse wire, of the mounting sleeve, and fixing sleeves are hinged to the ends, away from the mounting sleeve, of the two connecting rods; and the pulse wire can be fastened and prevented from being separated in the use process of the catheter body, the pulse wire can be conveniently separated, and practicability and convenience are improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a fitted cardiac pulse electric field ablation catheter. Background Art

[0002] Atrial fibrillation is one of the most common arrhythmias in clinical practice, with a high prevalence. In addition to inducing and aggravating heart failure, atrial fibrillation can also cause thromboembolic events, leading to cerebral stroke, and in severe cases, death or disability. Early detection and early treatment are particularly important.

[0003] Publication No. CN216167811U discloses a cardiac pulse electric field ablation catheter. This patent controls the voltage amplitude of the pulse square wave within the range of 300V-2000V, thereby selectively ablating myocardial cells without affecting other non-target tissues. At the same time, since the pulse discharge time is short, no thermal effect will be generated, thereby avoiding damage to the esophagus and phrenic nerve. However, this patent still has the following problems in actual use:

[0004] By controlling the voltage amplitude range of the pulse square wave to 300V-2000V, the cardiomyocytes can be selectively ablated without affecting other non-target tissues. However, in actual use, the cardiomyocytes are ablated through pulse discharge. The connecting wire of the cardiac pulse electric field ablation catheter needs to withstand high-frequency electric pulses and mechanical vibrations. The connected pulse wire needs to be reinforced to avoid detachment. Currently, welding or adding a fixed structure to the pulse wire is mainly used for fixation. However, it is inconvenient when the catheter and the pulse wire need to be separated.

[0005] A conformable cardiac pulse electric field ablation catheter is proposed to solve the above-mentioned problems. Utility Model Content

[0006] The purpose of the utility model is to provide a fitting cardiac pulse electric field ablation catheter to solve the problem proposed in the above-mentioned background technology that the voltage amplitude range of the pulse square wave is controlled within a range of 300V-2000V, thereby selectively ablating myocardial cells without affecting other non-target tissues. However, in actual use, when ablating myocardial cells through pulse discharge, the connecting wire of the cardiac pulse electric field ablation catheter needs to withstand forces such as high-frequency electric pulses and mechanical vibrations, and the connected pulse wire needs to be reinforced to avoid detachment. Currently, welding or adding a fixing structure to the pulse wire is mainly used for fixing, but it is inconvenient when the catheter and the pulse wire need to be separated.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a conformable cardiac pulse electric field ablation catheter, comprising a catheter body and a pulse wire;

[0008] The catheter body is provided with a plurality of ablation ridges inside, and an ablation electrode is provided at one end of the plurality of ablation ridges, and an operating handle is fixedly installed on one side of the catheter body, and a connector is installed at one end of the operating handle away from the catheter body, and the connector is adapted to be connected with the pulse wire;

[0009] Also includes:

[0010] A fastening assembly is provided on one side of the operating handle and the outer side of the pulse wire;

[0011] The fastening assembly comprises a mounting sleeve sleeved on the outside of the operating handle near the connector, and a connecting rod is symmetrically hinged on the side of the mounting sleeve near the pulse wire, and two connecting rods are hinged on one end away from the mounting sleeve, and rubber pads are fixedly installed on the sides of the two fixing sleeves, and two groups of plug rods are symmetrically installed on one side of the fixing sleeve, and two groups of slots are symmetrically opened through one side of the fixing sleeve, and the plug rods are adaptively connected to the slots;

[0012] Among them, U-shaped frames are symmetrically installed on both sides of the fixing sleeve on the other side, and the interiors of the two U-shaped frames are symmetrically slidably connected to positioning rods, and the positioning rods are slidably connected to the fixing sleeve on the other side, and a plurality of positioning grooves are opened on one side of the insertion rod, and the positioning rods are engaged and connected with the positioning grooves.

[0013] Preferably, a telescopic spring is sleeved on one side of the outer portion of the positioning rod, one end of the telescopic spring is fixedly connected to the U-shaped frame, and a connecting block is fixedly installed on the other end of the telescopic spring, and the connecting block is fixedly connected to the positioning rod.

[0014] Preferably, a plurality of mounting grooves are provided above one end of the positioning rod close to the positioning groove, and balls are hinged inside the plurality of mounting grooves.

[0015] Preferably, two pull plates are fixedly mounted on the sides of the two groups of positioning rods that are away from each other.

[0016] Preferably, two groups of through grooves are symmetrically opened on the outer side of the installation sleeve, and movable rods are slidably connected inside the through grooves, and anti-slip pads are fixedly installed on the ends of the two groups of movable rods that are close to each other, and two arc plates are fixedly installed on the ends of the two groups of movable rods that are far away from each other.

[0017] Preferably, the inner centers of the two arc-shaped plates are both threadedly connected with a screw rod, one end of the screw rod is movably connected to the mounting sleeve, and the other end of the screw rod is fixedly mounted with a plum blossom knob.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the fitting cardiac pulse electric field ablation catheter has a fastening assembly arranged outside the operating handle and the pulse wire, so that the catheter body can fasten the pulse wire to prevent it from being separated during use, and the pulse wire can be easily separated, thereby improving the practicality and convenience. The specific contents are as follows:

[0019] 1. A fastening assembly is provided on the outside of the operating handle and the pulse wire, which is connected to the pulse wire through a connector, so that a pulse voltage can be provided to the catheter body, and ablation can be performed by fitting the ablation electrode on the ablation ridge with the myocardial cells. The pulse wire is fastened by two fixing sleeves. When installing the fixing sleeves, the two fixing sleeves are put on the outside of the pulse wire, and then the two sets of plug rods are inserted into the slots. The plug rods can contact the balls on the positioning rods, so that the balls rotate inside the installation slots, so that the plug rods can lift the positioning rods, and the positioning rods slide on the U-shaped frame, so that the telescopic springs are compressed by the connecting block, so that the rubber pads on the two fixing sleeves clamp the pulse wires. , so that the positioning rod is aligned with the adjacent positioning groove, the telescopic spring restores the deformation, so that the positioning rod is reset to engage with the positioning groove, so that the insertion rod is limited, so that the fixing sleeve is fixed to the outside of the pulse wire, and the installation sleeve is fixed to the outside of the operating handle. The fixing sleeve and the installation sleeve are connected by a connecting rod, and the pulse wire can be tightened. When the fixing sleeve is disassembled, the two pull plates can be pulled to drive the positioning rod to move, so that the positioning rod is disengaged from the positioning groove, and the fixing sleeve loses the limit and can be removed. The catheter body can be used to tighten the pulse wire during use through the fastening assembly to avoid detachment, and it is convenient to separate the pulse wire, thereby improving practicality and convenience;

[0020] 2. When fixing the installation sleeve, put the installation sleeve on the outside of the operating handle, turn the two plum blossom knobs to drive the screw to rotate, so that the arc plate moves, and the arc plate moves while pushing the movable rod to slide inside the through groove, so that the anti-slip pad on the movable rod contacts the operating handle, and the installation sleeve can be fixed on the outside of the operating handle, thereby facilitating the user to fix the installation sleeve and improving convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the front structure of the utility model;

[0022] Figure 2 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0023] Figure 3 This is a schematic diagram of the side sectional structure of the fixing sleeve of the utility model;

[0024] Figure 4 For this utility model Figure 3The enlarged structural diagram at B in the middle;

[0025] Figure 5 It is a schematic diagram of the side sectional structure of the installation sleeve of the utility model.

[0026] In the figure: 1. catheter body; 101. ablation ridge; 102. operating handle; 103. pulse wire; 104. connector; 2. fastening assembly; 201. mounting sleeve; 202. connecting rod; 203. fixing sleeve; 204. rubber pad; 205. plug rod; 206. slot; 207. U-shaped frame; 208. positioning rod; 209. positioning groove; 210. ball bearing; 211. telescopic spring; 212. connecting block; 213. pull plate; 214. through groove; 215. movable rod; 216. anti-slip pad; 217. arc plate; 218. screw; 219. plum blossom knob. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the implementation regulations described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-5The utility model provides a technical solution: a fitted cardiac pulse electric field ablation catheter, comprising a catheter body 1 and a pulse wire 103, wherein a plurality of ablation ridges 101 are arranged inside the catheter body 1, and ablation electrodes are arranged at one end of the plurality of ablation ridges 101, and an operating handle 102 is fixedly installed on one side of the catheter body 1, and a connector 104 is installed on the end of the operating handle 102 away from the catheter body 1, and the connector 104 is adaptively connected to the pulse wire 103, and further comprising: a fastening assembly 2 is arranged on one side of the outside of the operating handle 102 and the pulse wire 103, wherein the fastening assembly 2 comprises a mounting sleeve 201 which is sleeved on the outside of the operating handle 102 close to the connector 104, and a connecting rod 202 is symmetrically hinged on a side of the mounting sleeve 201 close to the pulse wire 103, and both ends of the two connecting rods 202 away from the mounting sleeve 201 are hinged to a fixing sleeve 203, and a rubber pad 204 is fixedly installed on one side of the two fixing sleeves 203 that are close to each other, and two groups of insertion rods 205 are symmetrically installed on one side of the fixing sleeve 203 on one side, and two groups of slots 206 are symmetrically opened through one side of the fixing sleeve 203 on the other side, and the insertion rods 205 are adaptively connected to the slots 206, wherein U-shaped frames 207 are symmetrically installed on both sides of the fixing sleeve 203 on the other side, and the interiors of the two U-shaped frames 207 are symmetrically slidably connected to the positioning rods 208, and the positioning rods 208 are slidably connected to the fixing sleeve 203 on the other side, and a plurality of positioning grooves 209 are opened on one side of the insertion rod 205, and the positioning rods 208 are snap-connected with the positioning grooves 209, and the fastening assembly 2 allows the catheter body 1 to fasten the pulse wire 103 during use to avoid detachment, and it is convenient to separate the pulse wire 103, thereby improving practicality and convenience.

[0029] A telescopic spring 211 is sleeved on one side of the outer side of the positioning rod 208, and one end of the telescopic spring 211 is fixedly connected to the U-shaped frame 207, and a connecting block 212 is fixedly installed on the other end of the telescopic spring 211, and the connecting block 212 is fixedly connected to the positioning rod 208, so that the positioning rod 208 can automatically reset after moving. A plurality of mounting grooves are opened above one end of the positioning rod 208 close to the positioning groove 209, and a plurality of mounting grooves are hinged with ball bearings 210 inside, so that the insertion rod 205 can push the positioning rod 208 to move, and two pull plates 213 are fixedly installed on the sides away from each other of the two groups of positioning rods 208, so that the two positioning rods 208 can be moved at the same time. The positioning rod 208 and the mounting sleeve 201 are symmetrically provided with two groups of through grooves 214 on the outside, and the movable rods 215 are slidably connected inside the through grooves 214, and the ends of the two groups of movable rods 215 that are close to each other are fixedly installed with anti-slip pads 216, and the ends of the two groups of movable rods 215 that are far away from each other are respectively fixedly installed with two arc plates 217, so that the movement of the arc plates 2217 can drive the movable rods 215 to move, the inner centers of the two arc plates 217 are threadedly connected with screws 218, and one end of the screw 218 is movably connected to the mounting sleeve 201, and the other end of the screw 218 is fixedly installed with a plum blossom knob 219 to facilitate the movement of the arc plate 220.

[0030] Working principle: Before using this type of conformable cardiac pulse electric field ablation catheter, you need to check the overall condition of the device to make sure it can work normally. Figure 1 - Figure 5As shown, a fastening assembly 2 is provided on the outside of the operating handle 102 and the pulse wire 103, which is connected to the pulse wire 103 through a connector 104, so that a pulse voltage can be provided to the catheter body 1, and ablation can be performed by fitting the ablation electrode on the ablation ridge 101 with the myocardial cells. The pulse wire 103 is fastened by two fixing sleeves 203. When installing the fixing sleeves 203, the two fixing sleeves 203 are sleeved on the outside of the pulse wire 103, and then two groups of insertion rods 205 are inserted into the slots 206. The insertion rods 205 can contact the balls 210 on the positioning rods 208, so that the balls 210 rotate inside the installation groove, so that the insertion rods 205 can lift the positioning rods 208, and the positioning rods 208 slide on the U-shaped frame 207, so that the telescopic springs 211 are compressed by the connecting block 212, so that the rubber pads 204 on the two fixing sleeves 203 clamp the pulse The wire 103 makes the positioning rod 208 aligned with the adjacent positioning groove 209, and the telescopic spring 211 restores the deformation, so that the positioning rod 208 is reset to engage with the positioning groove 209, so that the insertion rod 205 is limited, so that the fixing sleeve 203 is fixed to the outside of the pulse wire 103, and the installation sleeve 201 is fixed to the outside of the operating handle 102. The connecting rod 202 is connected between the fixing sleeve 203 and the installation sleeve 201, and the pulse wire 103 can be fastened. When the fixing sleeve 203 is disassembled, the two pull plates 213 can be pulled to drive the positioning rod 208 to move, so that the positioning rod 208 is disengaged from the positioning groove 209, and the fixing sleeve 203 loses the limit and can be removed. The fastening component 2 allows the catheter body 1 to fasten the pulse wire 103 during use to avoid disengagement, and it is convenient to separate the pulse wire 103, thereby improving practicality and convenience.

[0031] When fixing the installation sleeve 201, the installation sleeve 201 is put on the outside of the operating handle 102, and the two plum blossom knobs 219 are rotated to drive the screw 218 to rotate, so that the arc plate 217 moves. When the arc plate 217 moves, it pushes the movable rod 215 to slide inside the through groove 214, so that the anti-slip pad 216 on the movable rod 215 contacts the operating handle 102, and the installation sleeve 201 can be fixed on the outside of the operating handle 102, which makes it convenient for the user to fix the installation sleeve 201 and improves convenience.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A conformable cardiac pulse electric field ablation catheter, comprising a catheter body (1) and a pulse guide wire (103); The catheter body (1) is provided with a plurality of ablation ridges (101) inside, and an ablation electrode is provided at one end of the plurality of ablation ridges (101), and an operating handle (102) is fixedly mounted on one side of the catheter body (1), and a connector (104) is mounted on one end of the operating handle (102) away from the catheter body (1), and the connector (104) is adaptably connected to the pulse wire (103); It is characterized in that Also includes: A fastening assembly (2) is provided on one side of the outside of the operating handle (102) and the pulse wire (103); The fastening assembly (2) comprises a mounting sleeve (201) sleeved on the outside of the operating handle (102) near the connector (104), and a connecting rod (202) is symmetrically hinged on the side of the mounting sleeve (201) near the pulse wire (103), and two connecting rods (202) are hinged on one end away from the mounting sleeve (201) and a fixing sleeve (203), and rubber pads (204) are fixedly installed on the sides of the two fixing sleeves (203) near each other, and two groups of insertion rods (205) are symmetrically installed on one side of the fixing sleeve (203), and two groups of slots (206) are symmetrically opened on one side of the fixing sleeve (203), and the insertion rods (205) are adaptively connected to the slots (206); Wherein, U-shaped frames (207) are symmetrically installed on both sides of the fixing sleeve (203) on the other side, and the interiors of the two U-shaped frames (207) are symmetrically slidably connected to positioning rods (208), and the positioning rods (208) are slidably connected to the fixing sleeve (203) on the other side, and a plurality of positioning grooves (209) are opened on one side of the insertion rod (205), and the positioning rods (208) are snap-fitted and connected to the positioning grooves (209).

2. The conformable cardiac pulse electric field ablation catheter according to claim 1, characterized in that: A telescopic spring (211) is sleeved on one side of the exterior of the positioning rod (208), one end of the telescopic spring (211) is fixedly connected to the U-shaped frame (207), and a connecting block (212) is fixedly installed on the other end of the telescopic spring (211), and the connecting block (212) is fixedly connected to the positioning rod (208).

3. The conformable cardiac pulse electric field ablation catheter according to claim 1, characterized in that: A plurality of mounting grooves are provided above one end of the positioning rod (208) close to the positioning groove (209), and balls (210) are hingedly connected inside the plurality of mounting grooves.

4. The conformable cardiac pulse electric field ablation catheter according to claim 1, characterized in that: Two pull plates (213) are respectively fixedly mounted on the far-away sides of the two groups of positioning rods (208).

5. The conformable cardiac pulse electric field ablation catheter according to claim 1, characterized in that: Two groups of through grooves (214) are symmetrically formed on the outer side of the installation sleeve (201), and movable rods (215) are slidably connected inside the through grooves (214), and anti-slip pads (216) are fixedly installed on the ends of the two groups of movable rods (215) that are close to each other, and two arc-shaped plates (217) are fixedly installed on the ends of the two groups of movable rods (215) that are far away from each other.

6. The conformable cardiac pulse electric field ablation catheter according to claim 5, characterized in that: The inner centers of the two arc-shaped plates (217) are both threadedly connected with a screw rod (218), one end of the screw rod (218) is movably connected to the mounting sleeve (201), and the other end of the screw rod (218) is fixedly mounted with a plum blossom knob (219).