CN112168338A - An intracavitary ablation device - Google Patents

Abstract

Translated fromChinese

本申请提供了一种腔内消融器，属于静脉消融技术领域。腔内消融器包括第一管、第二管、第一锁紧件、第三管、第二锁紧件、第四管、第三锁紧件、消融头、消融电极片、抓取网篮、拉丝和第四锁紧件。第一锁紧件用于将第一管与第二管锁紧。第二锁紧件用于将第三管与第二管锁紧。第三锁紧件用于将第四管与第三管锁紧。消融头连接于第三管的一端，并位于第二管内。消融电极片设于消融头上，消融电极片电连接有导线。抓取网篮设于第四管的一端，并位于第一管内。拉丝用于使抓取网篮张开或收拢，拉丝远离抓取网篮的一端穿出于第四管。第四锁紧件用于将拉丝与第四管锁紧。这种结构的腔内消融器结构简单，操作方便，可有效消除静脉血管中的纤维蛋白鞘。

The application provides an intracavity ablation device, which belongs to the technical field of vein ablation. The endoluminal ablation device includes 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 sheet, and a grabbing basket , wire drawing and fourth locking piece. The first locking member is used for locking the first tube and the second tube. The second locking member is used for locking the third tube and the second tube. The third locking member is used for locking the fourth pipe and the third pipe. The ablation head is connected to one end of the third tube and is located in the second tube. The ablation electrode sheet is arranged on the ablation head, and the ablation electrode sheet is electrically connected with a wire. The grabbing basket is arranged at one end of the fourth pipe and is located in the first pipe. The wire drawing is used to open or close the grabbing basket, and the end of the wire drawing away from the grabbing basket is passed through the fourth tube. The fourth locking piece is used for locking the drawing wire with the fourth tube. The endoluminal ablation device of this structure is simple in structure and convenient in operation, and can effectively eliminate the fibrin sheath in the venous 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 anintraluminal ablator 200 that includes afirst tube 10, asecond tube 20, a first retainingmember 30, athird tube 40, a second retainingmember 50, afourth tube 60, a third retainingmember 70, anablation head 80, anablation electrode sheet 90, a graspingbasket 100, apull wire 110, and a fourth retainingmember 120.

Thesecond tube 20 is movably disposed within thefirst tube 10. Thefirst locking member 30 is connected to thefirst pipe 10, and the first lockingmember 30 is used to lock thefirst pipe 10 with thesecond pipe 20. Thethird tube 40 is movably disposed within thesecond tube 20. Asecond locker 50 is attached to thesecond tube 20, and thesecond locker 50 is used to lock thethird tube 40 with thesecond tube 20. Thefourth tube 60 is movably disposed within thethird tube 40. Athird locker 70 is attached to thethird tube 40, and thethird locker 70 is used to lock thefourth tube 60 with thethird tube 40. Anablation head 80 is connected to one end of thethird tube 40, theablation head 80 being located within thesecond tube 20. Theablation electrode plate 90 is arranged on theablation head 80, and theablation electrode plate 90 is electrically connected with alead 91. Agripping basket 100 is provided at one end of thefourth tube 60, thegripping basket 100 being located within thefirst tube 10. Thewire 110 is movably disposed in thefourth tube 60, thewire 110 is connected to thegrasping basket 100, thewire 110 is used to open or close thegrasping basket 100, and an end of thewire 110 away from the graspingbasket 100 extends through thefourth tube 60. Afourth locking member 120 is attached to thefourth tube 60, thefourth locking member 120 being used to lock thewire 110 to thefourth 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. Theintracavity ablator 200 with the structure has simple structure and convenient operation, and can effectively eliminate the fibrin sheath 300 in the vein vessel 300.

Thefirst tube 10, thesecond tube 20, thethird tube 40 and thefourth tube 60 are hollow tubes with two open ends.

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

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

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

As shown in fig. 4, thesecond locker 50 includes asecond coupling body 51 and a plurality of second elastically deformingparts 52 circumferentially spaced apart from thesecond coupling body 51. Thesecond connector 51 is screwed to thesecond tube 20, and thesecond tube 20 has a second inner taperedsurface 21. When thesecond connection body 51 is rotated to axially move thesecond connection body 51 relative to thesecond tube 20, the plurality of secondelastic deformation portions 52 can be deformed toward the center position after abutting against the second inner taperedsurface 21 to press-lock thethird tube 40.

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

Thesecond 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, thesecond 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 innerconical 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.

Thesecond connector 51 is a rotary body, and thesecond 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 thethird tube 40 is provided with a plurality of limitinggrooves 41 which are arranged at intervals and arranged along the axial direction of thethird tube 40. Each second elastically deformingportion 52 has astrip portion 521. When the plurality of secondelastic deformation portions 52 are press-locked to thethird pipe 40, the bar-shapedportion 521 of each secondelastic deformation portion 52 is arranged in the axial direction of thethird pipe 40, and the bar-shapedportion 521 of each secondelastic deformation portion 52 is correspondingly caught in one of the catchinggrooves 41.

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

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

As shown in fig. 5, thethird locker 70 includes a third connectingbody 71 and a plurality of third elastically deformingparts 72 circumferentially spaced apart from the third connectingbody 71. The third connectingbody 71 is screwed to thethird tube 40, and thethird tube 40 has a third inner taperedsurface 42. When the third connectingbody 71 is rotated to axially move the third connectingbody 71 relative to thethird tube 40, the plurality of thirdelastic deformation portions 72 can be deformed toward the center position after abutting against the third inner taperedsurface 42 to press-lock thefourth tube 60.

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

Thethird pipe 40 includes a third large-diameter pipe section 43, a thirdtransition pipe section 44, and a third small-diameter pipe section 45, which are connected in sequence, the third connectingbody 71 is screwed to the third large-diameter pipe section 43, and the inner pipe wall of the thirdtransition pipe section 44 is the third innerconical 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. Thestopper groove 41 is provided on the outer peripheral wall of the third small-diameter tube section 45.

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

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

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

Thefourth pipe 60 includes a fourth large-diameter pipe section 62, a fourthtransition pipe section 63, and a fourth small-diameter pipe section 64, which are connected in sequence, the fourth connectingbody 121 is screwed to the fourth large-diameter pipe section 62, and the inner pipe wall of the fourthtransition pipe section 63 is the fourth innerconical 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 connectingbody 121 is a revolving body, and the fourth connectingbody 121 is provided with an external thread matched with the internal thread of the fourth large-diameter pipe section 62. The fourthelastic deformation portion 122 is a bent structure.

It should be noted that in other embodiments, the first lockingmember 30, thesecond locking member 50, thethird locking member 70 and thefourth locking member 120 can have other structures, such as locking screws.

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

Theablation head 80 is an elastic net structure, and after theablation head 80 is separated from thesecond tube 20 and exposed in the blood vessel, theablation 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, afirst receiving space 81 having an open end is formed in theablation head 80. Thegrasping basket 100 has asecond receiving space 101 formed therein and having an open end. The open end of theablation head 80 faces the open end of thegrasping basket 100. Thefourth tube 60 moves relative to thethird tube 40 to make thegrasping basket 100 abut against theablation head 80, so as to construct thefirst receiving space 81 and thesecond receiving space 101 as a sealed receiving space.

After the fibrin sheath 300 is pulled backwards by theablation electrode plate 90, thethird tube 40 and thefourth tube 60 are loosened by thethird locking member 70, and when thefourth tube 60 is pulled backwards (thefourth tube 60 moves relative to the third tube 40), the open end of the grabbingbasket 100 abuts against the open end of theablation head 80, so that the firstaccommodating space 81 and the secondaccommodating 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 theinner grabbing basket 100 in the process of pulling thethird tube 40 backwards.

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

With continued reference to fig. 7, grippingbasket 100 includes anet body 102, a plurality ofsupport rods 103, and a plurality oflinks 104. The supportingrods 103 correspond to the connectingrods 104 one by one, one end of each supportingrod 103 is hinged to the corresponding wire drawing 110, one end of each connectingrod 104 is hinged to the correspondingfourth pipe 60, and the other end of each connectingrod 104 is hinged to the middle of the corresponding supportingrod 103. Themesh body 102 is arranged on all thesupport rods 103.

In the above technical solution, when the wire drawing 110 moves relative to thefourth tube 60, the connectingrod 104 rotates relative to thefourth tube 60, the supportingrod 103 rotates relative to the wire drawing 110, and the connectingrod 104 and the supportingrod 103 rotate relative to each other, thereby realizing the opening or closing of thenet body 102. When thewire drawing wire 110 moves forward relative to thefourth pipe 60, thenet body 102 is finally folded, that is, thegripping basket 100 is folded; when thewire 110 is moved backward relative to thefourth tube 60, thenet body 102 will eventually be opened, i.e., thegripping 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)

Translated fromChinese

1.一种腔内消融器，其特征在于，包括：1. An intraluminal ablation device, characterized in that, comprising:第一管；first tube;第二管，可移动地设置于所述第一管内；a second pipe, movably disposed in the first pipe;第一锁紧件，连接于所述第一管，用于将所述第一管与所述第二管锁紧；a first locking member, connected to the first pipe, for locking the first pipe and the second pipe;第三管，可移动地设置于所述第二管内；a third pipe, movably disposed in the second pipe;第二锁紧件，连接于所述第二管，用于将所述第三管与所述第二管锁紧；a second locking member, connected to the second pipe, for locking the third pipe and the second pipe;第四管，可移动地设置于所述第三管内；a fourth pipe, movably arranged in the third pipe;第三锁紧件，连接于所述第三管，用于将所述第四管与所述第三管锁紧；a third locking member, connected to the third pipe, for locking the fourth pipe and the third pipe;消融头，连接于所述第三管的一端，并位于所述第二管内；an ablation head, connected to one end of the third tube and located in the second tube;消融电极片，设于所述消融头上，所述消融电极片电连接有导线；an ablation electrode sheet, which is arranged on the ablation head, and the ablation electrode sheet is electrically connected with a wire;抓取网篮，设于所述第四管的一端，并位于所述第一管内；Grab the mesh basket, which is arranged at one end of the fourth pipe and is located in the first pipe;拉丝，可移动地设置于所述第四管内，所述拉丝连接于所述抓取网篮，所述拉丝用于使所述抓取网篮张开或收拢，所述拉丝远离所述抓取网篮的一端穿出于所述第四管；以及The drawing wire is movably arranged in the fourth tube, the drawing wire is connected to the grabbing basket, the drawing wire is used to open or close the grabbing basket, and the drawing wire is away from the grabbing One end of the mesh basket passes through the fourth tube; and第四锁紧件，连接于所述第四管，用于将所述拉丝与所述第四管锁紧。The fourth locking member is connected to the fourth pipe and is used for locking the drawing wire with the fourth pipe.2.根据权利要求1所述的腔内消融器，其特征在于，所述消融头为脱离所述第二管后能够向外扩张的弹性网结构。2 . The endoluminal ablation device according to claim 1 , wherein the ablation head is an elastic mesh structure that can expand outward after being separated from the second tube. 3 .3.根据权利要求2所述的腔内消融器，其特征在于，所述消融头内形成一端开口的第一收容空间；3 . The intracavitary ablation device according to claim 2 , wherein a first receiving space with one end open is formed in the ablation head; 4 .所述抓取网篮内部形成一端开口的第二收容空间；所述消融头的开口端朝向所述抓取网篮的开口端；A second accommodating space with one end open is formed inside the grabbing basket; the open end of the ablation head faces the open end of the grabbing basket;所述第四管相对所述第三管移动能够使所述抓取网篮抵靠于所述消融头，以将所述第一收容空间和所述第二收容空间构建成一封口的收纳空间。The movement of the fourth tube relative to the third tube enables the grabbing basket to abut against the ablation head, so as to construct the first receiving space and the second receiving space into a sealed receiving space.4.根据权利要求1所述的腔内消融器，其特征在于，所述第一锁紧件包括第一连接体和周向间隔布置于所述第一连接体的多个第一弹性变形部；4 . The endoluminal ablation device according to claim 1 , wherein the first locking member comprises a first connecting body and a plurality of first elastic deformation portions circumferentially spaced apart from the first connecting body. 5 . ;所述第一连接体螺接于所述第一管，所述第一管具有第一内圆锥面；the first connecting body is screwed to the first pipe, and the first pipe has a first inner conical surface;当转动所述第一连接体使所述第一连接体相对所述第一管轴向移动时，所述多个第一弹性变形部在抵靠于所述第一内圆锥面后能够向中心位置变形，以挤压锁紧所述第二管。When the first connecting body is rotated to move the first connecting body axially relative to the first pipe, the plurality of first elastic deformation portions can be moved toward the center after abutting against the first inner conical surface The position is deformed to squeeze and lock the second tube.5.根据权利要求1所述的腔内消融器，其特征在于，所述第二锁紧件包括第二连接体和周向间隔布置于所述第二连接体的多个第二弹性变形部；5 . The endoluminal ablation device of claim 1 , wherein the second locking member comprises a second connecting body and a plurality of second elastic deformation portions circumferentially spaced apart from the second connecting body. 6 . ;所述第二连接体螺接于所述第二管，所述第二管具有第二内圆锥面；the second connecting body is screwed to the second pipe, and the second pipe has a second inner conical surface;当转动所述第二连接体使所述第二连接体相对所述第二管轴向移动时，所述多个第二弹性变形部在抵靠于所述第二内圆锥面后能够向中心位置变形，以挤压锁紧所述第三管。When the second connecting body is rotated to move the second connecting body axially relative to the second pipe, the plurality of second elastic deformation portions can move toward the center after abutting against the second inner conical surface The position is deformed to squeeze and lock the third tube.6.根据权利要求5所述的腔内消融器，其特征在于，所述第三管的外周壁上设有间隔布置且沿所述第三管的轴向布置的多个限位槽；6 . The endoluminal ablation device according to claim 5 , wherein a plurality of limiting grooves arranged at intervals and along the axial direction of the third tube are provided on the outer peripheral wall of the third tube; 7 .每个第二弹性变形部具有条形部；each second elastic deformation portion has a strip portion;当所述多个第二弹性变形部挤压锁紧所述第三管时，每个第二弹性变形部的条形部沿所述第三管的轴向布置，且每个第二弹性变形部的条形部对应卡于一个限位槽内。When the plurality of second elastic deformation parts press and lock the third tube, the strip portion of each second elastic deformation part is arranged along the axial direction of the third tube, and each second elastic deformation part is arranged along the axial direction of the third tube, and each second elastic deformation part is The bar-shaped part of the part is correspondingly clamped in a limit slot.7.根据权利要求1所述的腔内消融器，其特征在于，所述第三锁紧件包括第三连接体和周向间隔布置于所述第三连接体的多个第三弹性变形部；7 . The endoluminal ablation device according to claim 1 , wherein the third locking member comprises a third connecting body and a plurality of third elastic deformation portions arranged at circumferential intervals on the third connecting body. 8 . ;所述第三连接体螺接于所述第三管，所述第三管具有第三内圆锥面；the third connecting body is screwed to the third pipe, and the third pipe has a third inner conical surface;当转动所述第三连接体使所述第三连接体相对所述第三管轴向移动时，所述多个第三弹性变形部在抵靠于所述第三内圆锥面后能够向中心位置变形，以挤压锁紧所述第四管。When the third connecting body is rotated to move the third connecting body axially relative to the third pipe, the plurality of third elastic deformation parts can be moved toward the center after abutting against the third inner conical surface The position is deformed to squeeze and lock the fourth tube.8.根据权利要求1所述的腔内消融器，其特征在于，所述第四锁紧件包括第四连接体和周向间隔布置于所述第四连接体的多个第四弹性变形部；8 . The endoluminal ablation device according to claim 1 , wherein the fourth locking member comprises a fourth connecting body and a plurality of fourth elastic deformation portions arranged at a circumferential interval on the fourth connecting body. 9 . ;所述第四连接体螺接于所述第四管，所述第四管具有第四内圆锥面；the fourth connecting body is screwed on the fourth pipe, and the fourth pipe has a fourth inner conical surface;当转动所述第四连接体使所述第四连接体相对所述第四管轴向移动时，所述多个第四弹性变形部在抵靠于所述第四内圆锥面后能够向中心位置变形，以挤压锁紧所述拉丝。When the fourth connecting body is rotated to move the fourth connecting body axially relative to the fourth pipe, the plurality of fourth elastic deformation parts can move toward the center after abutting against the fourth inner conical surface The position is deformed to squeeze and lock the wire.9.根据权利要求1所述的腔内消融器，其特征在于，所述抓取网篮包括网体、多个支撑杆和多个连杆；9. The endoluminal ablation device according to claim 1, wherein the grabbing basket comprises a mesh body, a plurality of support rods and a plurality of connecting rods;所述支撑杆与所述连杆一一对应，所述支撑杆的一端铰接于所述拉丝，所述连杆的一端铰接于所述第四管，所述连杆的另一端铰接于所述支撑杆的中间位置；The support rod is in one-to-one correspondence with the connecting rod, one end of the support rod is hinged to the drawing wire, one end of the connecting rod is hinged to the fourth pipe, and the other end of the connecting rod is hinged to the the middle position of the support rod;所述网体布置于所述多个支撑杆上。The net body is arranged on the plurality of support rods.

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