CN112168338A - Intracavity ablation device - Google Patents

Abstract

The application provides an intracavity ablator, belongs to vein ablation technical field. The intracavity ablator comprises a first tube, a second tube, a first locking piece, a third tube, a second locking piece, a fourth tube, a third locking piece, an ablation head, an ablation electrode plate, a grabbing basket, a wire drawing and a fourth locking piece. The first locking member is used for locking the first pipe with the second pipe. The second locking member is used for locking the third pipe with the second pipe. The third locking member is used for locking the fourth tube with the third tube. The ablation head is connected to one end of the third tube and is located within the second tube. The ablation electrode plate is arranged on the ablation head and is electrically connected with a lead. The grabbing basket is arranged at one end of the fourth pipe and is positioned in the first pipe. The wire drawing is used for enabling the grabbing basket to be opened or closed, and one end, far away from the grabbing basket, of the wire drawing penetrates out of the fourth pipe. And the fourth locking piece is used for locking the drawn wire and the fourth pipe. The intracavity ablator with the structure has simple structure and convenient operation, and can effectively eliminate fibrin sheath in vein blood vessel.

Description

Intracavity ablation device

Technical Field

The application relates to the technical field of vein ablation, in particular to an intracavity ablator.

Background

The central venous catheterization is a very common technology in clinic, can quickly establish an effective venous channel for a patient, and has no rare clinical complications. The catheter is used as a foreign body in a blood vessel, fibrin is gradually deposited around the catheter along with the prolonging of the catheter placement time, and a sleeve-shaped fibrin sheath which is wrapped around the catheter is formed. The fibrin sheath is wrapped around the surface of the central venous catheter, begins at the point of contact between the catheter and the vein wall, and is firmly attached to the vein wall and is not easily removed even if the catheter is removed. The fibrin sheath can directly cause the central venous catheter to fail and is a significant risk factor for central venous stenosis. Currently there is no effective way to eliminate the fibrin sheath in the vein.

Disclosure of Invention

The embodiment of the application provides an intracavity ablator to improve the problem that a fibrin sheath in a vein cannot be effectively eliminated.

The embodiment of the application provides an intracavity ablator, which comprises a first tube, a second tube, a first locking piece, a third tube, a second locking piece, a fourth tube, a third locking piece, an ablation head, an ablation electrode plate, a grabbing basket, a wire drawing and a fourth locking piece;

the second tube is movably arranged in the first tube;

a first locking member connected to the first tube for locking the first tube to the second tube;

a third tube movably disposed within the second tube;

the second locking piece is connected to the second pipe and used for locking the third pipe with the second pipe;

a fourth tube movably disposed within the third tube;

the third locking piece is connected to the third pipe and used for locking the fourth pipe and the third pipe;

the ablation head is connected to one end of the third tube and is positioned in the second tube;

the ablation electrode plate is arranged on the ablation head and is electrically connected with a lead;

the grabbing basket is arranged at one end of the fourth pipe and is positioned in the first pipe;

the wire drawing is movably arranged in the fourth pipe, is connected to the grabbing basket, is used for opening or closing the grabbing basket, and penetrates out of the fourth pipe at one end of the wire drawing, which is far away from the grabbing basket;

and the fourth locking piece is connected with the fourth pipe and used for locking the drawn wire with the fourth pipe.

When the wire drawing device is used, the first pipe and the second pipe are locked through the first locking piece, the second pipe and the third pipe are locked through the second locking piece, the third pipe and the fourth pipe are locked through the third locking piece, and the fourth pipe and the wire drawing are locked through the fourth locking piece, so that the first pipe, the second pipe, the third pipe, the fourth pipe and the wire drawing form a whole, and the adjacent pipes cannot move relatively; then, inserting the whole first tube into the superior vena cava blood vessel, and enabling the ablation electrode plate to be positioned at the upper end of the fibrin sheath to be ablated; the first tube and the second tube are loosened through the first locking piece, the second tube is immovable, the first tube is retracted to the position of the ablation head, so that the grasping basket is exposed in the blood vessel from the first tube, and the first tube and the second tube are locked again through the first locking piece; then, the second tube and the third tube are loosened through the second locking piece, the third tube is immobile, the second tube and the first tube are retracted together, so that the ablation head is exposed from the second tube to the blood vessel, and the second tube and the third tube are locked through the second locking piece; then, the third tube and the fourth tube are loosened through the third locking part, the position of the fourth tube is adjusted, the grabbing basket in the furled state is positioned at the lower end of the fibrin sheath to be ablated, and the third tube and the fourth tube are locked through the third locking part; then, the fourth pipe and the drawn wire are loosened through the fourth locking piece, the grabbing basket is unfolded through the drawn wire, and the fourth pipe and the drawn wire are locked through the fourth locking piece; then, the lead is externally connected with an ablation radio frequency device, and the ablation radio frequency device works to enable the ablation electrode plate to cut off the upper end of the fibrin sheath; then, the third tube and the fourth tube are loosened through the third locking piece, the fourth tube is pulled backwards, the fibrin sheath enters the grabbing basket, and the third tube and the fourth tube are locked through the third locking piece; then, the second tube and the third tube are loosened through the second locking piece, and the third tube is pulled backwards to enable the ablation head to enter the second tube; then, the fourth pipe and the drawn wire are loosened through the fourth locking piece, the grabbing basket is slightly contracted through the drawn wire, and the fourth pipe and the drawn wire are locked through the fourth locking piece; subsequently, the first tube and the second tube are loosened through the first locking piece, and the second tube is pulled backwards (the wire drawing, the fourth tube and the third tube move backwards along with the second tube), so that the grabbing basket enters the first tube again; finally, the first tube is pulled out of the blood vessel, and finally the fibrin sheath is taken out. The intracavity ablator with the structure has simple structure and convenient operation, and can effectively eliminate fibrin sheath in vein blood vessel.

In some embodiments of the present application, the ablation head is an elastic mesh structure that can expand outward after detachment from the second tube.

Among the above-mentioned technical scheme, melt the head and be the elasticity net structure, melt the head and break away from the second pipe and expose in the blood vessel after, melt the head and will expand outward, make and melt the electrode and be close to the fibrin sheath on the vascular wall, make and melt the electrode and cut off the fibrin sheath.

In some embodiments of the present application, a first receiving space with an opening at one end is formed in the ablation head;

a second accommodating space with one open end is formed in the grabbing basket; the open end of the ablation head faces the open end of the grasping basket;

the fourth tube moves relative to the third tube to enable the grabbing basket to abut against the ablation head, so that the first accommodating space and the second accommodating space form a sealed accommodating space.

Among the above-mentioned technical scheme, owing to behind the fibrin sheath at the ablation electrode, loosen third pipe and fourth pipe through the third retaining member, when pulling the fourth pipe backward (the fourth pipe removes relative to the third pipe), the open end that snatchs the basket will lean on with the open end of melting the head counterbalance, make first accommodation space and second accommodation space constitute a confined accommodation space, thereby restrict the fibrin sheath in accommodation space, prevent follow-up in-process pulling the third pipe backward, the fibrin sheath drops in snatching the basket from the inside.

In some embodiments of the present application, the first locking member includes a first coupling body and a plurality of first elastic deformation portions arranged at circumferential intervals on the first coupling body;

the first connecting body is in threaded connection with the first pipe, and the first pipe is provided with a first inner conical surface;

when the first connecting body is rotated to enable the first connecting body to move axially relative to the first pipe, the plurality of first elastic deformation parts can deform towards the central position after abutting against the first inner conical surface, so that the second pipe is pressed and locked.

Among the above-mentioned technical scheme, because first connector spiro union is in first pipe, when the first connector of forward rotation, first connector will be relative first pipe axial displacement to make each first elastic component support and lean on in first internal conical surface. Because the first elastic deformation parts have elastic deformation capacity, each first elastic deformation part is deformed to the central position after abutting against the first inner conical surface, and therefore each first elastic deformation part is simultaneously extruded on the second pipe to lock the second pipe. When the second pipe needs to be loosened, the first connecting body is rotated reversely, and each first elastic deformation part is gradually restored to the original state, so that the second pipe is loosened, and the second pipe can move relative to the first pipe.

In some embodiments of the present application, the second locking member includes a second connecting body and a plurality of second elastically deformable portions circumferentially spaced apart from the second connecting body;

the second connector is screwed to the second tube, and the second tube is provided with a second inner conical surface;

when the second connecting body is rotated to enable the second connecting body to move axially relative to the second pipe, the plurality of second elastic deformation parts can deform towards the central position after abutting against the second inner conical surface, so that the third pipe is pressed and locked.

In the above technical scheme, since the second connecting body is screwed to the second pipe, when the second connecting body is rotated in the forward direction, the second connecting body moves axially relative to the second pipe, so that each second elastic part abuts against the second inner conical surface. The second elastic deformation parts have elastic deformation capacity, so that each second elastic deformation part is deformed towards the central position after abutting against the second inner conical surface, and each second elastic deformation part is simultaneously extruded on the third pipe to lock the third pipe. When the third pipe needs to be loosened, the second connecting body is rotated reversely, and each second elastic deformation part is gradually restored to the original state, so that the third pipe is loosened, and the third pipe can move relative to the second pipe.

In some embodiments of the present application, the outer peripheral wall of the third tube is provided with a plurality of spacing grooves arranged at intervals and arranged along the axial direction of the third tube;

each second elastic deformation portion has a strip-shaped portion;

when the plurality of second elastic deformation parts are used for extruding and locking the third pipe, the strip-shaped part of each second elastic deformation part is arranged along the axial direction of the third pipe, and the strip-shaped part of each second elastic deformation part is correspondingly clamped in one limiting groove.

In the above technical scheme, when the second elastic deformation portions squeeze and lock the third pipe, the strip-shaped portions are arranged along the axial direction of the third pipe and clamped in the limiting grooves; when the third pipe is loosened to enable the third pipe to move relative to the second pipe, the second connector can rotate reversely to reduce the acting force of the strip-shaped portion on the bottom wall of the limiting groove, when the third pipe can move relative to the second pipe, the strip-shaped portion is still in contact with the bottom wall of the limiting groove, all the second elastic deformation portions play a good role in supporting the third pipe, and the third pipe is kept to move stably at the center of the second pipe. In the moving process of the third pipe, the strip-shaped part of the second elastic deformation part is still clamped in the limiting groove, so that the strip-shaped part has a good limiting effect on the third pipe, the third pipe can be limited to rotate in the moving process, and the axial moving range of the third pipe can be limited.

In some embodiments of the present application, the third locking member includes a third connecting body and a plurality of third elastically deformable portions circumferentially spaced apart from the third connecting body;

the third connector is screwed with the third tube, and the third tube is provided with a third inner conical surface;

when the third connecting body is rotated to enable the third connecting body to move axially relative to the third pipe, the plurality of third elastic deformation parts can deform towards the central position after abutting against the third inner conical surface, so that the fourth pipe is pressed and locked.

In the above technical solution, since the third connecting body is screwed to the third pipe, when the third connecting body is rotated in the forward direction, the third connecting body will move axially relative to the third pipe, so that each third elastic portion abuts against the third inner conical surface. The third elastic deformation parts have elastic deformation capacity, so that each third elastic deformation part is deformed towards the central position after abutting against the third inner conical surface, and each third elastic deformation part is simultaneously extruded on the fourth pipe to lock the fourth pipe. When the fourth pipe needs to be loosened, the third connecting body is rotated reversely, and each third elastic deformation portion gradually recovers to the original state, so that the fourth pipe is loosened, and the fourth pipe can move relative to the third pipe.

In some embodiments of the present application, the fourth locking member includes a fourth connecting body and a plurality of fourth elastically deformable portions circumferentially spaced apart from the fourth connecting body;

the fourth connector is screwed to the fourth tube, and the fourth tube is provided with a fourth inner conical surface;

when the fourth connecting body is rotated to enable the fourth connecting body to move axially relative to the fourth pipe, the fourth elastic deformation parts can deform towards the central position after abutting against the fourth inner conical surface, so that the drawn wire is pressed and locked.

Among the above-mentioned technical scheme, because fourth connector spiro union is in the fourth pipe, when the fourth connector was rotated to the forward, the fourth connector will be relative fourth pipe axial displacement to make each fourth elastic component support and lean on in fourth internal cone face. Because the fourth elastic deformation parts have elastic deformation capacity, each fourth elastic deformation part is deformed to the central position after abutting against the fourth inner conical surface, and therefore each fourth elastic deformation part is simultaneously extruded to the drawn wire so as to lock the drawn wire. When the wire drawing is loosened, the fourth connecting bodies are rotated reversely, and the fourth elastic deformation parts gradually recover to loosen the wire drawing, so that the wire drawing can move relative to the fourth pipe.

In some embodiments of the present application, the gripping baskets comprise a net body, a plurality of support bars, and a plurality of links;

the supporting rods correspond to the connecting rods one to one, one end of each supporting rod is hinged to the corresponding wire drawing pipe, one end of each connecting rod is hinged to the corresponding fourth pipe, and the other end of each connecting rod is hinged to the middle of each supporting rod;

the net body is arranged on the plurality of support rods.

Among the above-mentioned technical scheme, when the wire drawing removed for the fourth pipe, the connecting rod will rotate for the fourth pipe relatively, and the bracing piece will rotate for the wire drawing relatively, and connecting rod and bracing piece will rotate relatively to realize opening or drawing in of dictyosome.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic structural view of an endoluminal ablator provided herein;

FIG. 2 is a schematic illustration of the operation of the endoluminal ablator provided herein;

FIG. 3 is an enlarged view of a portion A shown in FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 1 at B;

FIG. 5 is an enlarged view of a portion of FIG. 1 at C;

FIG. 6 is an enlarged view of a portion of FIG. 1 at D;

fig. 7 is a partial view of an endoluminal ablator provided herein.

Icon: a first tube 10; a first inner conical surface 11; a first large diameter pipe section 12; a first transition duct section 13; a first minor-diameter tube section 14; a second tube 20; a second inner conical surface 21; a second large diameter pipe section 22; a second transition duct section 23; a second small diameter pipe section 24; a first locking member 30; the first connecting body 31; a first elastically deforming portion 32; a third tube 40; a limiting groove 41; a third inner conical surface 42; a third large diameter pipe section 43; a third transition duct section 44; a third minor diameter section 45; a second locking member 50; a second connecting body 51; the second elastically deforming part 52; a bar 521; a fourth tube 60; a fourth inner conical surface 61; a fourth large diameter pipe section 62; a fourth transition duct section 63; a fourth small diameter tube section 64; a third locking member 70; the third connecting body 71; a third elastically deforming part 72; an ablation head 80; a first housing space 81; an ablation electrode pad 90; a lead wire 91; a gripping basket 100; a second housing space 101; a mesh body 102; a support bar 103; a connecting rod 104; drawing a wire 110; a fourth retaining member 120; a fourth connecting body 121; a fourth elastically deforming part 122; an intraluminal ablator 200; a blood vessel 300; a fibrin sheath 400.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Examples

As shown in fig. 1, the present embodiment provides an intraluminal ablator 200 that includes a first tube 10, a second tube 20, a first retaining member 30, a third tube 40, a second retaining member 50, a fourth tube 60, a third retaining member 70, an ablation head 80, an ablation electrode sheet 90, a grasping basket 100, a pull wire 110, and a fourth retaining member 120.

The second tube 20 is movably disposed within the first tube 10. The first locking member 30 is connected to the first pipe 10, and the first locking member 30 is used to lock the first pipe 10 with the second pipe 20. The third tube 40 is movably disposed within the second tube 20. A second locker 50 is attached to the second tube 20, and the second locker 50 is used to lock the third tube 40 with the second tube 20. The fourth tube 60 is movably disposed within the third tube 40. A third locker 70 is attached to the third tube 40, and the third locker 70 is used to lock the fourth tube 60 with the third tube 40. An ablation head 80 is connected to one end of the third tube 40, the ablation head 80 being located within the second tube 20. The ablation electrode plate 90 is arranged on the ablation head 80, and the ablation electrode plate 90 is electrically connected with a lead 91. A gripping basket 100 is provided at one end of the fourth tube 60, the gripping basket 100 being located within the first tube 10. The wire 110 is movably disposed in the fourth tube 60, the wire 110 is connected to the grasping basket 100, the wire 110 is used to open or close the grasping basket 100, and an end of the wire 110 away from the grasping basket 100 extends through the fourth tube 60. A fourth locking member 120 is attached to the fourth tube 60, the fourth locking member 120 being used to lock the wire 110 to the fourth tube 60.

In use, as shown in fig. 2, the first tube 10 is locked with the second tube 20 by the first locking member 30, the second tube 20 is locked with the third tube 40 by the second locking member 50, the third tube 40 is locked with the fourth tube 60 by the third locking member 70, and the fourth tube 60 is locked with the wire 110 by the fourth locking member 120, so that the first tube 10, the second tube 20, the third tube 40, the fourth tube 60 and the wire 110 form a whole, and no relative movement exists between the adjacent two; then, the whole first tube 10 is inserted into the superior vena cava 300, so that the ablation electrode slice 90 is positioned at the upper end of the fibrin sheath 400 to be ablated; loosening the first tube 10 and the second tube 20 by the first locking member 30, leaving the second tube 20 immobile, and retracting the first tube 10 (pulling the first tube 10 back) to the position of the ablation head 80 to expose the grasping basket 100 from within the first tube 10 to the blood vessel 300, and then locking the first tube 10 and the second tube 20 again by the first locking member 30; subsequently, the second tube 20 and the third tube 40 are loosened by the second locker 50, the third tube 40 is fixed, the second tube 20 and the first tube 10 are retracted together (the second tube 20 is pulled backward) to expose the ablation head 80 from the second tube 20 to the blood vessel 300, and the second tube 20 and the third tube 40 are locked by the second locker 50; then, the third tube 40 and the fourth tube 60 are loosened by the third locking member 70, the position of the fourth tube 60 is adjusted, the gripping basket 100 in the folded state is positioned at the lower end of the fibrin sheath 300 to be ablated, and the third tube 40 and the fourth tube 60 are locked by the third locking member 70; subsequently, the fourth tube 60 and the wire 110 are loosened by the fourth locking member 120, the grasping basket 100 is unfolded by moving the wire 110, and the fourth tube 60 and the wire 110 are locked by the fourth locking member 120; then, the lead 91 is externally connected with an ablation radio frequency device, and the ablation radio frequency device works to cut off the upper end of the fibrin sheath 300 by the ablation electrode plate 90; then, the third tube 40 and the fourth tube 60 are loosened by the third locking member 70, the fourth tube 60 is pulled backwards to make the fibrin sheath 300 enter the grasping basket 100, and the third tube 40 and the fourth tube 60 are locked by the third locking member 70; subsequently, the second tube 20 and the third tube 40 are loosened by the second locker 50, and the third tube 40 is pulled backward to allow the ablation head 80 to enter the second tube 20; subsequently, the fourth tube 60 and the wire 110 are loosened by the fourth locker 120, the grasping basket 100 is slightly contracted by the wire 110, and the fourth tube 60 and the wire 110 are locked by the fourth locker 120; subsequently, the first tube 10 is loosened from the second tube 20 by the first locking member 30, the second tube 20 is pulled backward (the wire 110, the fourth tube 60 and the third tube 40 move backward following the second tube 20), and the gripping basket 100 is re-entered into the first tube 10; finally, the first tube 10 is pulled out of the blood vessel 300, and the fibrin sheath 300 is finally carried out. The intracavity ablator 200 with the structure has simple structure and convenient operation, and can effectively eliminate the fibrin sheath 300 in the vein vessel 300.

The first tube 10, the second tube 20, the third tube 40 and the fourth tube 60 are hollow tubes with two open ends.

As shown in fig. 3, the first lock member 30 includes a first coupling body 31 and a plurality of first elastic deformation portions 32 arranged at circumferential intervals at the first coupling body 31. The first connecting body 31 is screwed to the first pipe 10, and the first pipe 10 has a first inner tapered surface 11. When the first connecting body 31 is rotated to axially move the first connecting body 31 relative to the first pipe 10, the plurality of first elastic deformation portions 32 can deform toward the center position after abutting against the first inner conical surface 11 to press-lock the second pipe 20.

Since the first connecting body 31 is screwed to the first tube 10, when the first connecting body 31 is rotated in the forward direction, the first connecting body 31 will move axially relative to the first tube 10, so that each first elastic portion abuts against the first inner conical surface 11. Since the first elastic deformation portions 32 have elastic deformation capability, each first elastic deformation portion 32 will deform toward the central position after abutting against the first inner conical surface 11, so that each first elastic deformation portion 32 is simultaneously pressed against the second tube 20 to lock the second tube 20. When the second pipe 20 needs to be loosened, the first connecting body 31 is rotated in the opposite direction, and the first elastic deformation portions 32 are gradually restored to their original shapes, so that the second pipe 20 is loosened, and the second pipe 20 can move relative to the first pipe 10.

The first pipe 10 includes a first large-diameter pipe section 12, a first transition pipe section 13, and a first small-diameter pipe section 14, which are connected in sequence, the first connecting body 31 is screwed to the first large-diameter pipe section 12, and the inner pipe wall of the first transition pipe section 13 is the first inner conical surface 11.

The first connecting body 31 is a rotary body, and the first connecting body 31 is provided with an external thread matched with the internal thread of the first large-diameter pipe section 12. The first elastic deformation portion 32 has a bent structure.

As shown in fig. 4, the second locker 50 includes a second coupling body 51 and a plurality of second elastically deforming parts 52 circumferentially spaced apart from the second coupling body 51. The second connector 51 is screwed to the second tube 20, and the second tube 20 has a second inner tapered surface 21. When the second connection body 51 is rotated to axially move the second connection body 51 relative to the second tube 20, the plurality of second elastic deformation portions 52 can be deformed toward the center position after abutting against the second inner tapered surface 21 to press-lock the third tube 40.

Since the second connection body 51 is screwed to the second tube 20, when the second connection body 51 is rotated in the forward direction, the second connection body 51 will move axially relative to the second tube 20, so that each second elastic portion abuts against the second inner tapered surface 21. Since the second elastic deformation portions 52 have elastic deformation capability, each second elastic deformation portion 52 will deform toward the center position after abutting against the second inner conical surface 21, so that each second elastic deformation portion 52 is simultaneously pressed against the third tube 40 to lock the third tube 40. When the third tube 40 needs to be loosened, the second connecting body 51 is rotated in the opposite direction, and the second elastic deformation portions 52 are gradually restored to their original shapes, so that the third tube 40 is loosened, and the third tube 40 can move relative to the second tube 20.

The second pipe 20 includes a second large-diameter pipe section 22, a second transition pipe section 23, and a second small-diameter pipe section 24, which are connected in sequence, the second connector 51 is screwed to the second large-diameter pipe section 22, and the inner pipe wall of the second transition pipe section 23 is the second inner conical surface 21. The second small-diameter pipe section 24 is inserted into the first small-diameter pipe section 14, and the outer diameter of the second small-diameter pipe section 24 is matched with the inner diameter of the first small-diameter pipe section 14.

The second connector 51 is a rotary body, and the second connector 51 is provided with an external thread matched with the internal thread of the second large-diameter pipe section 22.

Further, the outer peripheral wall of the third tube 40 is provided with a plurality of limiting grooves 41 which are arranged at intervals and arranged along the axial direction of the third tube 40. Each second elastically deforming portion 52 has a strip portion 521. When the plurality of second elastic deformation portions 52 are press-locked to the third pipe 40, the bar-shaped portion 521 of each second elastic deformation portion 52 is arranged in the axial direction of the third pipe 40, and the bar-shaped portion 521 of each second elastic deformation portion 52 is correspondingly caught in one of the catching grooves 41.

When the second elastic deformation parts 52 are pressed and locked on the third pipe 40, the strip-shaped parts 521 are arranged along the axial direction of the third pipe 40 and clamped in the limiting grooves 41; when the third tube 40 needs to be loosened to move the third tube 40 relative to the second tube 20, the second connecting body 51 can be rotated reversely to reduce the acting force of the strip-shaped portion 521 on the bottom wall of the limiting groove 41, so that the strip-shaped portion 521 can still contact with the bottom wall of the limiting groove 41 under the condition that the third tube 40 can move relative to the second tube 20, and all the second elastic deformation portions 52 can well support the third tube 40 to keep the third tube 40 at the central position of the second tube 20 for smooth movement. In the moving process of the third tube 40, since the bar-shaped portion 521 of the second elastic deformation portion 52 is still clamped in the limiting groove 41, the bar-shaped portion 521 plays a good limiting role for the third tube 40, so that the third tube 40 can be limited from rotating in the moving process, and the axial moving range of the third tube 40 can be limited.

The second elastic deformation portion 52 is a bent Z-shaped structure as a whole.

As shown in fig. 5, the third locker 70 includes a third connecting body 71 and a plurality of third elastically deforming parts 72 circumferentially spaced apart from the third connecting body 71. The third connecting body 71 is screwed to the third tube 40, and the third tube 40 has a third inner tapered surface 42. When the third connecting body 71 is rotated to axially move the third connecting body 71 relative to the third tube 40, the plurality of third elastic deformation portions 72 can be deformed toward the center position after abutting against the third inner tapered surface 42 to press-lock the fourth tube 60.

Since the third connecting body 71 is screwed to the third tube 40, when the third connecting body 71 is rotated in the forward direction, the third connecting body 71 will move axially relative to the third tube 40, so that each of the third elastic parts abuts against the third inner tapered surface 42. Since the third elastic deformation portions 72 have elastic deformation capability, each third elastic deformation portion 72 will deform toward the center position after abutting against the third inner conical surface 42, so that each third elastic deformation portion 72 is simultaneously pressed against the fourth tube 60 to lock the fourth tube 60. When the fourth tube 60 needs to be loosened, the third connecting body 71 is rotated in the reverse direction, and the third elastic deformation portions 72 gradually restore to their original shapes, so that the fourth tube 60 is loosened, and the fourth tube 60 can move relative to the third tube 40.

The third pipe 40 includes a third large-diameter pipe section 43, a third transition pipe section 44, and a third small-diameter pipe section 45, which are connected in sequence, the third connecting body 71 is screwed to the third large-diameter pipe section 43, and the inner pipe wall of the third transition pipe section 44 is the third inner conical surface 42. The third small-diameter tube section 45 is inserted into the second small-diameter tube section 24, and the outer diameter of the third small-diameter tube section 45 is smaller than the inner diameter of the second small-diameter tube section 24. The stopper groove 41 is provided on the outer peripheral wall of the third small-diameter tube section 45.

The third connection body 71 is a rotary body, and the third connection body 71 is provided with an external thread matched with the internal thread of the third large-diameter pipe section 43. The third elastic deformation portion 72 has a bent structure.

As shown in fig. 6, the fourth locker 120 includes a fourth connecting body 121 and a plurality of fourth elastically deforming parts 122 circumferentially spaced apart from the fourth connecting body 121. The fourth connecting body 121 is screwed to the fourth tube 60, and the fourth tube 60 has a fourth inner tapered surface 61. When the fourth connection body 121 is rotated to axially move the fourth connection body 121 relative to the fourth tube 60, the plurality of fourth elastic deformation portions 122 can be deformed toward the center position after abutting against the fourth inner tapered surface 61 to press the locking wire 110.

Since the fourth connecting body 121 is screwed to the fourth tube 60, when the fourth connecting body 121 is rotated in the forward direction, the fourth connecting body 121 will move axially relative to the fourth tube 60, so that each of the fourth elastic parts abuts against the fourth inner conical surface 61. Since the fourth elastic deformation portions 122 have elastic deformation capability, each fourth elastic deformation portion 122 will deform toward the center position after abutting against the fourth inner conical surface 61, so that each fourth elastic deformation portion 122 is simultaneously pressed against the wire 110 to lock the wire 110. When the wire 110 needs to be loosened, the fourth connection body 121 is rotated in the reverse direction, and the fourth elastic deformation portions 122 are gradually restored to their original shapes, so that the wire 110 is loosened, and the wire 110 can move relative to the fourth tube 60.

The fourth pipe 60 includes a fourth large-diameter pipe section 62, a fourth transition pipe section 63, and a fourth small-diameter pipe section 64, which are connected in sequence, the fourth connecting body 121 is screwed to the fourth large-diameter pipe section 62, and the inner pipe wall of the fourth transition pipe section 63 is the fourth inner conical surface 61. The fourth small-diameter tube section 64 is inserted into the third small-diameter tube section 45, and the outer diameter of the fourth small-diameter tube section 64 is matched with the inner diameter of the third small-diameter tube section 45.

The fourth connecting body 121 is a revolving body, and the fourth connecting body 121 is provided with an external thread matched with the internal thread of the fourth large-diameter pipe section 62. The fourth elastic deformation portion 122 is a bent structure.

It should be noted that in other embodiments, the first locking member 30, the second locking member 50, the third locking member 70 and the fourth locking member 120 can have other structures, such as locking screws.

As shown in fig. 7, the ablation head 80 is an elastic mesh structure that can expand outward after being detached from the second tube 20.

The ablation head 80 is an elastic net structure, and after the ablation head 80 is separated from the second tube 20 and exposed in the blood vessel, the ablation head 80 expands outwards to make the ablation electrode close to the fibrin sheath 300 on the blood vessel wall, so that the ablation electrode cuts off the fibrin sheath 300.

In addition, a first receiving space 81 having an open end is formed in the ablation head 80. The grasping basket 100 has a second receiving space 101 formed therein and having an open end. The open end of the ablation head 80 faces the open end of the grasping basket 100. The fourth tube 60 moves relative to the third tube 40 to make the grasping basket 100 abut against the ablation head 80, so as to construct the first receiving space 81 and the second receiving space 101 as a sealed receiving space.

After the fibrin sheath 300 is pulled backwards by the ablation electrode plate 90, the third tube 40 and the fourth tube 60 are loosened by the third locking member 70, and when the fourth tube 60 is pulled backwards (the fourth tube 60 moves relative to the third tube 40), the open end of the grabbing basket 100 abuts against the open end of the ablation head 80, so that the first accommodating space 81 and the second accommodating space 101 construct a sealed accommodating space, and the fibrin sheath 300 is limited in the accommodating space, thereby preventing the fibrin sheath 300 from falling off from the inner grabbing basket 100 in the process of pulling the third tube 40 backwards.

Wherein the ablation head 80 is generally conical, and the small end of the ablation head 80 is connected to the third small diameter section 45 of the third tube 40. When the ablation head 80 is inside the second tube 20, the outer wall of the large end of the ablation head 80 abuts against the inner circumferential wall of the second tube 20. The ablation electrode sheet 90 is disposed inside or outside the ablation head 80.

With continued reference to fig. 7, gripping basket 100 includes a net body 102, a plurality of support rods 103, and a plurality of links 104. The supporting rods 103 correspond to the connecting rods 104 one by one, one end of each supporting rod 103 is hinged to the corresponding wire drawing 110, one end of each connecting rod 104 is hinged to the corresponding fourth pipe 60, and the other end of each connecting rod 104 is hinged to the middle of the corresponding supporting rod 103. The mesh body 102 is arranged on all the support rods 103.

In the above technical solution, when the wire drawing 110 moves relative to the fourth tube 60, the connecting rod 104 rotates relative to the fourth tube 60, the supporting rod 103 rotates relative to the wire drawing 110, and the connecting rod 104 and the supporting rod 103 rotate relative to each other, thereby realizing the opening or closing of the net body 102. When the wire drawing wire 110 moves forward relative to the fourth pipe 60, the net body 102 is finally folded, that is, the gripping basket 100 is folded; when the wire 110 is moved backward relative to the fourth tube 60, the net body 102 will eventually be opened, i.e., the gripping basket 100 is opened.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (9)

1. An endoluminal ablator, comprising:

a first tube;

a second tube movably disposed within the first tube;

a first locking member connected to the first tube for locking the first tube with the second tube;

a third tube movably disposed within the second tube;

the second locking piece is connected to the second pipe and used for locking the third pipe with the second pipe;

a fourth tube movably disposed within the third tube;

the third locking piece is connected to the third pipe and used for locking the fourth pipe and the third pipe;

the ablation head is connected to one end of the third tube and is positioned in the second tube;

the ablation electrode plate is arranged on the ablation head and is electrically connected with a lead;

the grabbing basket is arranged at one end of the fourth pipe and is positioned in the first pipe;

the wire drawing is movably arranged in the fourth pipe, is connected to the grabbing basket, is used for opening or closing the grabbing basket, and penetrates out of the fourth pipe at one end of the wire drawing, which is far away from the grabbing basket; and

and the fourth locking piece is connected to the fourth pipe and used for locking the drawn wire with the fourth pipe.

2. The endoluminal ablator of claim 1, wherein the ablation head is a resilient mesh structure that is expandable outwardly after detachment from the second tube.

3. The endoluminal ablator according to claim 2, wherein said ablation head defines a first receiving space therein which is open at one end;

a second accommodating space with one open end is formed in the grabbing basket; the open end of the ablation head faces the open end of the grasping basket;

the fourth tube moves relative to the third tube to enable the grabbing basket to abut against the ablation head, so that the first accommodating space and the second accommodating space form a sealed accommodating space.

4. The endoluminal ablator according to claim 1, wherein the first locking member comprises a first linkage body and a plurality of first resilient deformations circumferentially spaced apart from the first linkage body;

the first connecting body is in threaded connection with the first pipe, and the first pipe is provided with a first inner conical surface;

when the first connecting body is rotated to enable the first connecting body to move axially relative to the first pipe, the plurality of first elastic deformation parts can deform towards the central position after abutting against the first inner conical surface, so that the second pipe is pressed and locked.

5. The endoluminal ablator according to claim 1, wherein the second retaining member comprises a second connecting body and a plurality of second elastically deformable portions circumferentially spaced apart from the second connecting body;

the second connector is screwed to the second tube, and the second tube is provided with a second inner conical surface;

when the second connecting body is rotated to enable the second connecting body to move axially relative to the second pipe, the plurality of second elastic deformation parts can deform towards the central position after abutting against the second inner conical surface, so that the third pipe is pressed and locked.

6. The endoluminal ablator according to claim 5, wherein the peripheral wall of the third tube defines a plurality of spaced-apart retention grooves axially along the third tube;

each second elastic deformation portion has a strip-shaped portion;

when the plurality of second elastic deformation parts are used for extruding and locking the third pipe, the strip-shaped part of each second elastic deformation part is arranged along the axial direction of the third pipe, and the strip-shaped part of each second elastic deformation part is correspondingly clamped in one limiting groove.

7. The endoluminal ablator according to claim 1, wherein the third retaining member comprises a third connecting body and a plurality of third elastically deformable portions circumferentially spaced apart from the third connecting body;

the third connector is screwed with the third tube, and the third tube is provided with a third inner conical surface;

when the third connecting body is rotated to enable the third connecting body to move axially relative to the third pipe, the plurality of third elastic deformation parts can deform towards the central position after abutting against the third inner conical surface, so that the fourth pipe is pressed and locked.

8. The endoluminal ablator according to claim 1, wherein the fourth retaining member comprises a fourth connecting body and a plurality of fourth elastically deformable portions circumferentially spaced apart on the fourth connecting body;

the fourth connector is screwed to the fourth tube, and the fourth tube is provided with a fourth inner conical surface;

when the fourth connecting body is rotated to enable the fourth connecting body to move axially relative to the fourth pipe, the fourth elastic deformation parts can deform towards the central position after abutting against the fourth inner conical surface, so that the drawn wire is pressed and locked.

9. The endoluminal ablator of claim 1, wherein the gripping basket comprises a mesh body, a plurality of support rods, and a plurality of links;

the supporting rods correspond to the connecting rods one to one, one end of each supporting rod is hinged to the corresponding wire drawing pipe, one end of each connecting rod is hinged to the corresponding fourth pipe, and the other end of each connecting rod is hinged to the middle of each supporting rod;

the net body is arranged on the plurality of support rods.

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