CN216221636U

CN216221636U - V-shaped ablation clamp with limiting structure

Info

Publication number: CN216221636U
Application number: CN202122655400.4U
Authority: CN
Inventors: 吴桂电; 张有干
Original assignee: Hangzhouready Biological Technology Co ltd
Current assignee: Hangzhouready Biological Technology Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-08
Anticipated expiration: 2031-10-29

Abstract

The utility model relates to the field of medical instruments, in particular to a V-shaped ablation clamp with a limiting structure. The clamping and closing gap of the existing V-shaped ablation clamp during working is difficult to control, the level of a doctor on site needs to be relied on, and the clamping gap is easy to generate larger deviation. In order to solve the technical problems, the utility model provides a V-shaped ablation clamp with a limiting structure, which comprises a catheter, a mounting seat arranged in the catheter, and a left clamp and a right clamp which are arranged on the mounting seat and can move in opposite directions, wherein the inner ends of the two clamps are movably connected with the mounting seat, opposite surfaces of the two clamps are provided with matched electrodes, the limiting structure with a stop block is arranged between the outer ends of the two clamps, and the limiting structure can limit a gap after the two clamps are folded. The utility model keeps the gap between the two clamps after being folded to be the preoperative preset distance through the limiting structure, so that the clamping effect is consistent with the preoperative scheme, and the ablation is facilitated.

Description

V-shaped ablation clamp with limiting structure

Technical Field

The utility model relates to the field of medical instruments, in particular to a V-shaped ablation clamp with a limiting structure.

Background

The V-shaped ablation clamp for treating atrial fibrillation of a heart through a chest minimally invasive mode is used for ablating pulmonary veins through two left and right clamps which can move close to each other in opposite directions during operation, the rear ends of the two clamps are rotatably arranged on the same mounting seat, electrodes matched in pairs are arranged on opposite surfaces between the two clamps, the mounting seat and the clamps are arranged in an ablation catheter, the mounting seat and the clamps can move forwards during operation, the clamps extend out of an opening at the front end of the ablation catheter, the two clamps are opened to be close to the pulmonary veins firstly and then folded to clamp the pulmonary veins and keep the opposite surfaces of the two clamps parallel, the electrodes on the clamps are close to the pulmonary veins, the rear ends of the ablation clamps are connected with a high-voltage electric pulse generator and then are electrified, and the discharge of the paired electrodes is utilized to ablate the pulmonary veins to realize pulmonary vein isolation and further treat atrial fibrillation. Before operation, the gap of the ablation clamp after clamping and folding the pulmonary veins can be determined according to image data of a patient, but the folding gap of the two clamps to the blood vessels in the operation is completely carried out on site by an operator, the gap after the two clamps are folded has a great influence on the subsequent treatment effect, the electrodes are excessively tightly attached to cause short circuit of the electrodes due to too tight clamping, the clamps can also unnecessarily damage the pulmonary veins, and the ablation effect of the electrodes with too large distance can be poor due to too loose clamping.

SUMMERY OF THE UTILITY MODEL

The utility model provides a V-shaped ablation clamp with a limiting structure, aiming at the technical problems that the clamping and folding gap of the existing V-shaped ablation clamp is difficult to control, the height of the clamping and folding gap depends on the practical operation level of a doctor on an operation site, and the clamping gap of the pulmonary vein is easy to generate large deviation.

The technical scheme adopted by the utility model for solving the technical problem is as follows: a V-shaped ablation clamp with a limiting structure comprises a catheter, a mounting seat arranged in the catheter, and a left clamp and a right clamp which are arranged on the mounting seat and can move in opposite directions, wherein the inner ends of the two clamps are movably connected with the mounting seat, and electrodes matched with each other are arranged on opposite surfaces of the two clamps. According to the utility model, the limiting structure with the stop block is arranged between the outer ends of the two clamps, so that the gap after the two clamps are folded is limited to be consistent with the preset distance before the operation, the folding gap of the ablation clamp in the operation is realized through the structure of the ablation clamp without depending on the operation of an operator, and the ablation effect of the subsequent ablation clamp is ensured.

As a further improvement and supplement to the above technical solution, the present invention adopts the following technical measures: the limiting structure comprises a tube seat, a spring and a stop block, the tube seat is of a sleeve structure with two open ends and is fixed on the opposite surface of the outer end of any clamp in the left clamp and the right clamp, the spring is arranged in the tube seat along the length direction of the tube seat, one end of the spring extends out of the tube seat to connect the stop block, the stop block is larger than the opening of the tube seat on one side of the spring, and the other end of the spring is connected with the clamp. The limiting structure is matched with the fixed pipe seat through the stop block capable of moving elastically to limit the folding of the two clamps, so that the gap between the two clamps after folding is consistent with the preset distance. Because the stop block can elastically move along the length direction of the spring under the action of the spring, when the two clamps are folded to enable the stop block to abut against one clamp, the two clamps are continuously folded to be close to each other, the stop block elastically moves and compresses the spring until the stop block abuts against the opening end of the tube seat on one side, the two clamps are folded to be in place and cannot be continuously close to each other again at the moment, and the gap reaches the preset distance. Because the ablation clamp is a disposable surgical tool, gaps of various specifications can be made according to different clamping gaps of the pulmonary veins by operation, the ablation clamp of different specifications is different in the thickness of the stop block, and the gap after the two clamps are folded is adjusted and changed by utilizing the thickness change of the stop block.

The connecting ends of the spring and the clamp are arranged in a mounting hole channel formed in the clamp, and the axes of the mounting hole channel, the tube seat and the spring are coincided. The clamp is provided with a special mounting hole channel for mounting and placing the spring, and the mounting hole channel and the tube seat can both play a role in guiding the extension or compression of the spring, so that the spring is prevented from moving and deviating, and the normal use of the limiting structure is influenced.

The clamp is characterized in that a gear is arranged on the mounting seat, a first rack and a second rack which are matched with the gear are arranged on two sides of the gear respectively, the two racks are parallel to each other and are movably arranged on the mounting seat, the left clamp and the right clamp are connected to the first rack and the second rack in a rotating mode through the left rotating wheel and the right rotating wheel respectively, the inner end of each clamp is coaxially fixed with the corresponding rotating wheel, the left rotating wheel and the right rotating wheel are respectively connected with a pull wire which can drive the clamps to rotate, the left rotating wheel and the right rotating wheel are provided with torsional springs which can be reset in a rotating mode, and the pull wires can enable the left clamp and the right clamp to rotate and fold to be parallel to the two clamps. During operation gear revolve drives two racks and moves towards each other and is close to, and two runners drive the rotation through acting as go-between simultaneously, and under rack and runner combined action, two clamps are close to in opposite directions and fold up, and until limit structure's dog supports the tube socket open end of homonymy, two clamps fold up to put in place and carry the pulmonary vein. The clamp is enabled to move by using a transmission structure combining a rack and a rotating wheel, and the displacement track of the clamp is formed by combining rack translation and rotating of the rotating wheel, so that the two clamps are folded towards each other or unfolded back to back by using a more compact structure; meanwhile, the current position is conveniently locked by the meshing of the gear and the rack and the pulling of the pull wire to the rotating wheel, so that the two clamps are not loosened and opened after being folded in place, and the gap is kept unchanged. The reset torsion springs on the rotating wheels enable the two rotating wheels to have the trend of resetting and rotating to open, and under the condition that the stay wires are not pulled, the two rotating wheels enable the two clamps to rotate back to open. In addition, the torsional spring can also make two runners have the trend of rotating to fold in opposite directions, and the pulling act can make two runners rotate and open dorsad at this moment.

The pull wires of the left rotating wheel and the right rotating wheel are connected together, or the pull wires of the left rotating wheel and the right rotating wheel are mutually independent. The two rotating wheels can use the stay wires or two independent stay wires which are connected together, the stay wires which are connected together can enable the two rotating wheels to rotate simultaneously, the stay wires of the two independent rotating wheels are respectively and independently pulled to drive the two rotating wheels to rotate, and the two stay wires are arranged to enable the two clamps to rotate to be close to each other and to be folded to a parallel state.

The gap between the closed left clamp and the closed right clamp is 4-20 mm. The clearance between the two clamps after being folded is controlled to be 4-20 mm through the limiting structure, and the clamp is suitable for pulmonary vein ablation treatment.

The lengths of the left clamp and the right clamp extending out of the guide pipe are L, and the L is 10-150 mm; the thickness of the left clamp and the thickness of the right clamp are both W, and W is 1-10 mm. The length L of the two clamps extending out of the catheter is 10-150 mm, the thickness W of the clamps is 1-10 mm, and the extending length and the thickness of the clamps can enable the clamps to have enough strength and rigidity to meet the requirement of pulmonary vein ablation.

Be equipped with 2 ~ 3 groups of paired electrodes between left side clamp and the right clamp, every group paired electrode all is including setting up left side electrode and right side electrode on the opposite face of left and right clamp separately. The two clamps are provided with a plurality of groups of paired electrodes, the electrodes are discharged through the 2-3 groups of paired electrodes during ablation, the pulmonary veins clamped between the left clamp and the right clamp are ablated, each group of paired electrodes comprises an electrode of the left clamp and an electrode of the right clamp, and after the two electrodes are electrified, one electrode is used as a positive electrode and the other electrode is used as a negative electrode for discharging. In addition, each electrode can be connected with the power output of the high-voltage electric pulse generator by an independent wire, so that each group of paired electrodes can independently control discharge.

According to the utility model, the limiting structure with the stop block is arranged between the outer ends of the two clamps, so that the parallel gap of the two clamps after being folded in place is consistent with the preoperative formulated treatment scheme, the problem that the gap is difficult to control depending on the operation of a doctor in the use of the existing ablation clamp is solved, and the ablation operation is ensured to be carried out smoothly.

Drawings

FIG. 1: the utility model is a schematic diagram of the opening structure of two clamps.

FIG. 2: the utility model discloses a schematic view of a folding structure of two clamps.

FIG. 3: the utility model discloses an enlarged schematic diagram of a limiting structure.

In the figure: 1. the wire drawing device comprises a left clamp, 2. a right clamp, 3. a left electrode, 4. a right electrode, 5. a guide pipe, 6. a mounting seat, 7. a limiting structure, 8. a pipe seat, 9. a spring, 10. a stop block, 11. a gear, 12. a first rack, 13. a second rack, 14. a left rotating wheel, 15. a right rotating wheel, 16. a mounting hole and 17. a wire drawing line.

Detailed Description

The utility model is further described with reference to the following description and embodiments in conjunction with the accompanying drawings.

As shown in fig. 1 to 3, a V-shaped ablation clamp with a limiting structure includes a catheter 5, a mounting seat 6 disposed in the catheter 5, and a left clamp 1 and a right clamp 2 disposed on the mounting seat 6 and capable of moving in opposite directions, inner ends of the two clamps are movably connected to the mounting seat 6, electrodes matched with each other are disposed on opposite surfaces of the two clamps, a limiting structure 7 with a stopper 10 is disposed between outer ends of the two clamps, the limiting structure 7 can limit a gap between the two clamps after being folded, the limiting structure 7 keeps the gap between the left clamp 1 and the right clamp 2 after being folded at 4 to 20mm, and the preferred gap after being folded in this embodiment is 10 mm. The limiting structure 7 comprises a tube seat 8, a spring 9 and a stop dog 10, the tube seat 8 in the embodiment is a sleeve structure with two open ends, the sleeve structure is fixed on the opposite surface of the right clamp 2 and faces the left clamp 1, the spring 9 is arranged in the tube seat 8 along the length direction of the tube seat 8, one end of the spring 9 extends out of the tube seat 8 to be connected with the stop dog 10, the stop dog 10 is larger than the opening of the tube seat 8 on the side where the spring 9 extends out, the other end of the spring 9 is arranged in a mounting hole 17 formed in the right clamp 2 and is connected with the right clamp 2, and the mounting hole 17 is coincided with the axes of the tube seat 8 and the spring 9; a gear is arranged on the mounting seat 6, a first rack 12 and a second rack 13 which are matched with the gear are respectively arranged on two sides of the gear, the two racks are parallel to each other and are movably arranged on the mounting seat 6, the left clamp 1 is rotatably connected to the first rack 12 through a left rotating wheel 14, the right clamp 2 is rotatably connected to the second rack 13 through a right rotating wheel 15, the inner end of each clamp is coaxially fixed with the corresponding rotating wheel, in the embodiment, the left rotating wheel 14 and the right rotating wheel 15 are respectively connected with an independent pull wire 17 to drive rotation, and meanwhile, torsion springs are arranged on the two rotating wheels to enable the rotating wheels to have a tendency of rotating reset; 2-3 pairs of electrodes are arranged between the left clamp 1 and the right clamp 2, in the embodiment, 2 pairs of electrodes are preferably arranged between the two clamps, and each pair of electrodes respectively comprises a left electrode 3 arranged opposite to the left clamp 1 and a right electrode 4 arranged opposite to the right clamp 2.

Before the ablation clamp is used, the size of a closure gap needs to be confirmed in advance through a preoperative scheme discussion, and then an ablation clamp with a corresponding specification is selected. When the ablation catheter is moved to the position near the pulmonary vein during operation, the mounting seat and the clamps can move forwards, the clamps extend out from the front end opening of the ablation catheter, the length of the two clamps extending out of the ablation catheter after the two clamps are folded is L and is 100-150 mm, the optimal length of the embodiment is 80mm, and the thickness of the two clamps is W and is 1-10 mm, and the optimal length of the embodiment is 3 mm. Pulling the stay wire to make the left and right rotating wheels rotate to open the two clamps, simultaneously, the gear rotates to drive the two racks to translate and keep away from, further, the two clamps are opened, the ablation catheter is close to the pulmonary veins, when the pulmonary veins are positioned between the two clamps, the gear rotates reversely to drive the two racks to translate and close, then the stay wire is loosened gradually, the two rotating wheels also rotate reversely to make the two clamps close to the pulmonary veins to be treated by the two clamps in parallel, the opposite surfaces on the two clamps are kept parallel at the moment, the electrodes on the two clamps are close to the pulmonary veins, the rear end of the ablation clamp is connected with a high-voltage electric pulse generator to electrify the electrodes, the pulmonary veins are ablated by discharge of the paired electrodes to realize pulmonary vein isolation, and then atrial fibrillation is treated. In the process of closing and approaching the two clamps, the stop block on the right clamp touches the left clamp, the stop block moves elastically and compresses the spring along with the continuous closing and approaching of the two clamps until the stop block abuts against the opening end of the tube seat on one side, at the moment, the two clamps are closed in place and cannot be closed again, and the gap also reaches the preset distance of 10 mm.

Claims

1. The utility model provides a take limit structure's V-arrangement to ablate clamp, includes pipe (5) and locates mount pad (6) in it, establishes two left clamp (1) and right clamp (2) that can move about in opposite directions on mount pad (6), and the inner of two clamps all is equipped with the electrode that matches on the opposite face of two clamps with mount pad (6) swing joint, characterized by be equipped with limit structure (7) of taking dog (10) between the outer end of two clamps, limit structure (7) can limit the clearance after two foldings when two clamps are foldings.

2. The V-shaped ablation clamp with the limiting structure according to claim 1, wherein the limiting structure (7) comprises a tube seat (8), a spring (9) and a stop block (10), the tube seat (8) is of a sleeve structure with two open ends and is fixed on the opposite surface of the outer end of any one of the left clamp and the right clamp (1, 2) facing the other clamp, the spring (9) is arranged in the tube seat (8) along the length direction of the tube seat (8), one end of the spring (9) extends out of the tube seat (8) to connect the stop block (10), the stop block (10) is larger than the opening of the tube seat (8) on the side where the spring (9) extends out, and the other end of the spring (9) is connected with the clamp.

3. The V-shaped ablation clamp with the limiting structure as claimed in claim 2, wherein the connecting ends of the spring (9) and the clamp are arranged in a mounting hole (16) formed in the clamp, and the axes of the mounting hole (16), the tube seat (8) and the spring (9) are coincident.

4. The V-shaped ablation clamp with the limiting structure as claimed in claim 1, wherein a gear is arranged on the mounting seat (6), a first rack (12) and a second rack (13) which are matched with the gear are respectively arranged on two sides of the gear, the two racks are parallel and movably arranged on the mounting seat (6), the left clamp (1) and the right clamp (2) are respectively connected on the first rack (12) and the second rack (13) in a rotating way through a left rotating wheel (14) and a right rotating wheel (15), the inner end of each clamp is coaxially fixed with the corresponding rotating wheel, the left rotating wheel (14) and the right rotating wheel (15) are respectively connected with a pull wire (17) which can drive the left clamp (14) and the right clamp (15) to rotate, and reset torsional springs are arranged on the left rotating wheel (14) and the right rotating wheel (15), and the pull wires (17) can enable the left clamp (14) and the right clamp (15) to rotate and close to be parallel.

5. The V-shaped ablation forceps with the limiting structure as defined in claim 4, wherein the pulling wires (17) of the left and right rotating wheels (14,15) are connected together, or the pulling wires (17) of the left and right rotating wheels (14,15) are independent of each other.

6. The V-shaped ablation clamp with the limiting structure as claimed in any one of claims 1 to 5, wherein the gap between the closed left clamp and the closed right clamp (1, 2) is 4-20 mm.

7. The V-shaped ablation clamp with the limiting structure as claimed in claim 1, wherein the lengths of the left clamp (1) and the right clamp (2) extending out of the catheter (5) are L, and L is 10-150 mm; the thickness of the left clamp (1) and the thickness of the right clamp (2) are both W, and W is 1-10 mm.

8. The V-shaped ablation clamp with the limiting structure as claimed in any one of claims 1 to 7, wherein 2-3 pairs of electrodes are arranged between the left clamp (1) and the right clamp (2), and each pair of electrodes comprises a left electrode (3) and a right electrode (4) which are respectively arranged on the opposite surfaces of the left clamp (1) and the right clamp (2).