CN201840518U - Melting system - Google Patents

Abstract

The utility model discloses a melting system, which comprises a sheath tube with a central chamber. A melting duct is arranged in the central chamber; the duct including a duct body is provided with a far end, a near end and a second central chamber; a melting portion fixed to the far end of the duct body includes an elastic head end tube; the elastic head end tube is further provided with a pore; a guide wire and a lead are arranged in the second central chamber and extend into the elastic head end tube through the second central chamber; the guide wire extends to the outside of the duct through the pore; a far end of the guide wire is provided with an expansion support; and the expansion support consists of an expansion element by means of screw rotation. When the rotating direction of the duct is the same as the screw direction of the expansion element, the expansion element cannot rotate so as to stably support the guide wire.

Description

A kind of ablation system

Technical field

This utility model relates to a kind of ablation system, concretely, relates to a kind of ablation system that is used for the tubulose port area.

Background technology

Electricity physiological electrode conduit (hereinafter to be referred as electrode catheter) has been widely used in the medical practice at present, and the electricity physiological signal that it is mainly used in inner each position of record heart carries out electricity irritation to heart, thereby reaches the purpose to heart disease mapping and treatment.Its using method is at first puncture femoral vein blood vessel or internal jugular vein blood vessel, under radioscopy, along lumen of vessels electrode catheter is delivered to diverse location in the heart, and heart is carried out electrophysiologic study, mapping or radio-frequency (RF) ablation.

Conduit in the market in use, generally enters part to be melted by the seal wire traction, withdraws from seal wire then in body, then melts.And the far-end of conduit mostly is vertical structure, and when being used for linear ablation, the described part that melts is waited to melt part with the linearity in the atrium and contacted with each other, and supported and fixes for the described part that melts, thereby reach good ablation effect.But for tubular area, as pulmonary vein, when adopting the conduit of this structure to melt, its effect is very undesirable.Because when adopting this conduit when tubular areas such as pulmonary vein melt, except ablating electrode, the other parts of conduit all do not support the location, make described conduit be difficult to find target position in ablation procedure, are difficult for handling.

Therefore, need be a kind of for the tubulose port area, as melting of orifices of pulmonary veins, can provide better support localized ablation system.

Summary of the invention

This utility model provides a kind of ablation system, comprises the sheath pipe with a central lumen, and described central chamber is provided with ablation catheter;

Described conduit comprises catheter body, and it has far-end, near-end and second central lumen, is fixed with at the far-end of described catheter body and melts part, is fixed with joystick at the near-end of described catheter body;

The described part that melts comprises elasticity head end pipe, and it comprises at least one chamber, is provided with shape-memory wire at least one chamber of described elasticity head end pipe, also is provided with an aperture on the described elasticity head end pipe;

Also comprise seal wire and lead in described second central chamber, it extends in the chamber of described elasticity head end pipe by second central lumen, described seal wire extends to the conduit outside by described aperture, the far-end of described seal wire is provided with expanding stent, and described expanding stent is made of the rotation of expansion element spiral.

Preferably, described expanding stent can constitute by described expansion element one-way spiral rotation, also can constitute by described expansion element bidirectional screw rotation.

Preferably, after described expansion element is shaped in advance, on the described expanding stent that is adhesively fixed.

Preferably, described expansion element is made by shape-memory material, and is more preferred, and described expansion element is by nickel-titanium alloy material.

In the embodiment of the present utility model, the described part that melts comprises a bending section, and preferred, described bending section is a helical structure.

Described bending section supports by described shape-memory wire and constitutes.

Preferably, the left side projection view of described bending section is circular, and its diameter is 20-25mm.

In the orthographic projection view of described bending section, preferred, its length is 20-30mm.

Preferably, also be provided with ring electrode on described elasticity head end pipe, it is electrically connected with described lead respectively.

Of the present utility model one preferred embodiment in, described ablation system comprises the seal wire that has expanding stent, described expanding stent is made of the rotation of expansion element spiral, when the hand of spiral of direction and the expansion element of the described conduit of rotation is identical, this expansion element can not rotate, thereby provides stable support to seal wire.

Description of drawings

Shown in Figure 1 is the structural representation of a kind of preferredablation system 10 of the present utility model;

The postrotational view that shown in Figure 2 is according to ablation system among Fig. 1 10;

The cutaway view that shown in Figure 3 is along A-A line among Fig. 2;

The cutaway view that shown in Figure 4 is along B-B line among Fig. 1;

The cutaway view that meltspart 31 that shown in Figure 5 is according to this utility model preferred embodiment, the annexation betweenpart 31 and thecatheter body 33 is melted in expression;

The left view that shown in Figure 6 is according to ablation system among Fig. 1 10.

The specific embodiment

Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail, but this utility model is not limited only to the following examples.

Shown in Figure 1 is the structural representation of a kind of preferredablation system 10 of the present utility model, comprises sheath

Pipe 12 is located at theconduit 13 in the describedsheath pipe 12, and is located at theseal wire 14 in the described conduit 13.Describedseal wire 14 comprises far-end and near-end, and its far-end is provided with expandingstent 15.

The postrotational view that shown in Figure 2 is according to ablation system among Fig. 1 10.Describedconduit 13 comprisescatheter body 33, and describedcatheter body 33 comprises far-end and near-end, and the far-end of describedcatheter body 33 is connected with and meltspart 31, and the near-end of describedcatheter body 33 is connected with describedjoystick 17.

The cutaway view that shown in Figure 3 is along A-A line among Fig. 2.Describedsheath pipe 12 comprises singlecentral lumen 21, and describedconduit 13 extends in describedcentral lumen 21, and describedsheath pipe 12 can be made by the macromolecular material of biocompatibility, and is preferred, made by polyethylene or makrolon material.

The cutaway view that shown in Figure 4 is along B-B line among Fig. 1.The cutaway view that meltspart 31 that shown in Figure 5 is according to this utility model preferred embodiment, the annexation betweenpart 31 and thecatheter body 33 is melted in expression.Describedcatheter body 33 comprises reinforced pipe and is placed in its outside main body pipe (not shown).Described main body pipe can be made by the macromolecular material of biocompatibility, and is preferred, made by polyether block amide, polyurethane or nylon material.Preferably, the inwall of described main body pipe comprises one deck wire braid (not shown) at least, can be the rustless steel braid, and described wire braid can be one deck, two-layer or more.Described reinforced pipe comprises single secondcentral lumen 331, as shown in Figure 5.Described reinforced pipe can be made by any proper polymer material, and is preferred, by polyether block amide, polyurethane or the extrusion modling of nylon material one.Described catheter body is preferably elongated, flexible, but incompressible on its length direction, describedcentral lumen 331 extending axially incatheter body 33.

As shown in Figure 5, the describedpart 31 that melts comprises elasticityhead end pipe 311, and it can be made by biocompatible materials, is preferably made by elastomeric biomaterial, as the block polyetheramides resin.Preferably, the inwall of described elasticityhead end pipe 31 comprises one deck wire braid (not shown) at least, can be the rustless steel braid, and described wire braid can be one deck, two-layer or more.

As shown in Figure 5, described elasticityhead end pipe 311 comprises far-end and near-end, and it can be single chamber structure or multi-cavity structure, is preferably three chamber structures, comprises first chamber, 35, thesecond chambers 36 and the 3rd chamber 37.Describedfirst chamber 35,second chamber 36 and the3rd chamber 37 can all be eccentric chambers, also can be that a central lumen and two eccentric chambers constitute, and it is connected with thecentral lumen 331 of describedcatheter body 33 respectively.The near-end of described elasticityhead end pipe 311 is connected with describedcatheter body 33, and the far-end of described elasticityhead end pipe 311 is provided with ablating electrode 16.Be provided withring electrode 11 on the length direction of elasticityhead end pipe 311, its quantity can be according to actual needs and different, can not have ring electrode, also can be one, two, three, four or more.

Preferably, the near-end of described elasticityhead end pipe 311 islevigate end 315, as shown in Figure 5, its external diameter matches with the internal diameter ofcatheter body 33, describedlevigate end 315 is inserted in thecatheter body 33, it can be fixed by bonding, welding or other suitable manner, and is preferred, by ultraviolet curing glue that itself andcatheter body 33 bondings is fixing.

As shown in Figure 5, also be provided with shape-memory wire 34 in the described elasticityhead end pipe 311, it can be made by any suitable material, is preferably made by Nitinol.Described shape-memory wire 34 extends insecond chamber 36 of described elasticityhead end pipe 311, and its remote extension is fixed on the elasticityhead end pipe 311 by glue or other suitable material to the far-end of described elasticity head end pipe 311.The far-end of described shape-memory wire 34 can not fixed yet, and directly is placed on the far-end of elasticity head end pipe 311.The near-end of described shape-memory wire 34 is bonded and fixed at the near-end of described elasticityhead end pipe 311 by glue or other suitable material, promptly is fixed on the end of describedlevigate end 315.

As shown in Figure 3, the describedpart 31 that melts comprises abending section 313, and it is by described shape-memory wire 34 crooked formations.The bending of describedbending section 313 and size, those skilled in the art can determine according to the shape and size of pulmonary vein or pulmonary vein chamber, can be any suitable structure.In this utility model, preferred, describedbending section 313 is a helical structure, and its bending can be supported by described shape-memory wire 34 and constitute.

The left view that shown in Figure 6 is according to ablation system among Fig. 1 10.The left side projection view of described expandingstent 15 is circular, and its diameter is 20-25mm.In the front projection view of described expandingstent 15, as Fig. 1, Fig. 2 and shown in Figure 3, its length is 20-30mm.

As Fig. 2, Fig. 3, Fig. 5 and shown in Figure 6, the proximal end of described elasticityhead end pipe 311 is provided withaperture 32, and describedaperture 32 is used for the extension of seal wire 14.Describedseal wire 14 can be made by Nitinol or other suitable material, is used for guide support and enters pulmonary vein.The far-end of describedseal wire 14 extends infirst chamber 35 of described elasticityhead end pipe 311 by thecentral lumen 331 of describedcatheter body 33, and extends out by described aperture 32.The near-end of describedseal wire 14 extends tojoystick 17 by secondcentral lumen 331 of describedcatheter body 33, and extends to the outside of describedconduit 10 byjoystick 17.

The far-end of describedseal wire 14 is provided with expandingstent 15, and described expandingstent 15 comprises far-end, near-end and expansion element 51.The structure of described expandingstent 15 is the parts that are suitable for expanding into from foldable structure expansion structure, is used to put into body cavity, as the pulmonary vein place, plays the effect of support, thereby makes melting thatconduit 13 can be stable.Described expandingstent 15 can constitute by describedexpansion element 51 one-way spirals rotation, also can constitute by describedexpansion element 51 bidirectional screws rotation.Described one-way spiral rotation is meant described swollen

Expand element 51 all to same direction spiral rotation; Described bidirectional screw rotation is meant the spiral rotation in the opposite direction respectively of describedexpansion element 51, and promptly describedexpansion element 51 cross-helicities rotation can constitute braiding structure, as shown in Figure 2.The quantity of describedexpansion element 51, those skilled in the art can determine according to actual needs.This utility model is preferred, described expandingstent 15 is the self-expanding structure, and it is made of the rotation ofexpansion element 51 spirals, when the hand of spiral of the direction of the describedconduit 13 of rotation andexpansion element 51 is identical, describedexpansion element 51 can not rotate, thereby provides stable support to seal wire.Just can realize the folding of described expandingstent 15 and expand by handlingjoystick 17.

Describedexpansion element 51 can be any suitable shape-memory material, and this utility model is preferably nickel-titanium alloy material, and it has shape memory function, makes described expandingstent 15 can return to reservation shape when folding and expansion.According to those skilled in the art's needs, describedexpansion element 51 can be shaped in advance, this utility model is preferably spiral type, then somepreformed expansion elements 51 is fixed to the far-end and the near-end of described expandingstent 15, and its outside can also be with thread-protectedtube 52 and 53.This utility model is preferred, and describedexpansion element 51 can be fixed by bonding or welding.Described thread-protectedtube 52 and 53 is enclosed within the end of described someexpansion elements 51 respectively, by being adhesively fixed.

When described expandingstent 15 all was positioned at describedconduit 13, it was a foldable structure; When pushing describedseal wire 14 forward by describedjoystick 17 when, described expandingstent 15 slowly launches, and when it all launches, the surface of described expandingstent 15 is propped up the pulmonary vein place, thereby canwhole ablation system 10 is fixing.By describedjoystick 17 conduit is delivered to suitable position, orifices of pulmonary veins place again, by rotating describedconduit 13, make the describedpart 31 that melts, and tightly recline, thereby realize melting the pulmonary vein place with described orifices of pulmonary veins in the rotation of pulmonary vein place.

Lead 38, as shown in Figure 5, thecentral lumen 331 by describedcatheter body 33 extends insecond chamber 36 of elasticityhead end pipe 13, and its far-end is electrically connected withring electrode 11 and ablatingelectrode 16 respectively.At the section lead that extend describedcatheter body 33 and described elasticityhead end pipe 311 junctions, preferred, its outside is with first thread-protectedtube 314.

Lead 38 can be fixed onring electrode 11 and the ablatingelectrode 16 by welding or other suitable manner, and is preferably fixing by welding, as shown in Figure 5.Preferably, also be connected with safe steel wire on thelead 38, prevent that ablatingelectrode 16 from coming off after, be detained in the body.The near-end oflead 38 is connected withplug 73 on the describedjoystick 17, and its method of attachment can be adopted any suitable method well known to those skilled in the art, for example fixes by welding.

As shown in Figure 1, describedjoystick 17 comprises handlemain body 71, and it has far-end, near-end and one

Single central lumen (not shown).The far-end of described handlemain body 71 is connected withjoint 72, is used for connectingutricle pipe 14 andjoystick 17; The near-end of describedjoystick 17 is connected withguider 74, is used to guideseal wire 14 to enter joystick 17.Describedseal wire 14 extends in the described catheter body by the central lumen of described handle body 71.The near-end of described handlemain body 71 also comprises aside opening 75, and the near-end of describedlead 38 extends out by described side opening 75, is connected withplug 73.

Preferably, can also comprise that in thecentral lumen 331 of describedcatheter body 33 at least oneheat sensor 312 extends within it, it can be an occasionally critesistor of thermoelectricity; The quantity of described heat sensor can also be two, three, four or more.As shown in Figure 5, in a preferred embodiment, the far-end of describedheat sensor 312 is fixed on the described ablatingelectrode 16 by bonding, welding or other suitable manner, preferably be bonded in the ablatingelectrode 16 by heat-conducting glue, the near-end of describedheat sensor 312 extends in thecentral lumen 331 of describedcatheter body 33 by described the3rd chamber 37, extend out by describedjoystick 17 at last, (not shown) links to each other with device for detecting temperature.

Ablation system 10 of the present utility model is applicable to melting of tubulose port area, as melting of orifices of pulmonary veins, but is not limited to orifices of pulmonary veins, and it also can be used for superior vena cava and trunk mouth are melted.

According to a preferred implementation of the present utility model, describedablation system 10 before use, describedconduit 13 and describedseal wire 14 and expandingstent 15 are positioned at described sheath pipe 12.In the use, earlier describedsheath pipe 12 is sent into the suitable position of orifices of pulmonary veins, then operate describedjoystick 17 and push describedseal wire 14 forward, described expandingstent 15 and describedconduit 13 slowly leave described sheath pipe 12.Described expandingstent 15 slowly launches, and during to its whole expansion, the surface with described expandingstent 15 props up the pulmonary vein place earlier, therebywhole ablation system 10 can be fixed.By describedjoystick 17conduit 13 is pushed to suitable position, orifices of pulmonary veins place again, by rotating describedconduit 13, make the describedpart 31 that melts, and tightly recline, thereby realize melting the pulmonary vein place with described orifices of pulmonary veins in the rotation of pulmonary vein place.Melt finish after, operate describedjoystick 17, described expandingstent 15 slowly is folded into folded state, continue to handle joystick to describedconduit 13 and described expandingstent 15 and is retracted to fully in the describedsheath pipe 12, and describedsystem 10 is withdrawn from body.

It is described that embodiment of the present utility model is not limited to the foregoing description; under the situation that does not depart from spirit and scope of the present utility model; those of ordinary skills can make various changes and improvements to this utility model in form and details, and these all are considered to fall into protection domain of the present utility model.

Claims (13)

1. an ablation system is characterized in that comprising the sheath pipe with a central lumen, and described central chamber is provided with conduit;

Described conduit comprises catheter body, and it has far-end, near-end and second central lumen, is fixed with at the far-end of described catheter body and melts part, is fixed with joystick at the near-end of described catheter body;

The described part that melts comprises elasticity head end pipe, and it comprises at least one chamber, is provided with shape-memory wire in described at least one chamber, also is provided with an aperture on the described elasticity head end pipe;

Also comprise seal wire and lead in described second central chamber, it extends in the chamber of described elasticity head end pipe by second central lumen, and described seal wire extends to the conduit outside by described aperture; The far-end of described seal wire is provided with expanding stent, and described expanding stent is made of the rotation of expansion element spiral.

2. ablation system according to claim 1 is characterized in that described expanding stent is made of described expansion element one-way spiral rotation.

3. ablation system according to claim 1 is characterized in that described expanding stent is made of described expansion element bidirectional screw rotation.

4. according to claim 1 or 2 or 3 described ablation systems, it is characterized in that described expansion element made by shape-memory material.

5. according to claim 1 or 2 or 3 described ablation systems, it is characterized in that described expansion element is shaped in advance after, by being fixed on the described expanding stent.

6. according to claim 1 or 2 or 3 described ablation systems, the left side projection view that it is characterized in that described expanding stent is for circular, and its diameter is 20-25mm.

7. according to claim 1 or 2 or 3 described ablation systems, it is characterized in that in the orthographic projection view of described expanding stent that its length is 20-30mm.

8. according to claim 1 or 2 or 3 described ablation systems, it is characterized in that the described part that melts comprises a bending section.

9. ablation system according to claim 8 is characterized in that described bending section is a helical structure.

10. ablation system according to claim 9 is characterized in that described bending section supports formation by described shape-memory wire.

11. according to claim 1 or 2 or 3 described ablation systems, it is characterized in that described joystick comprises handle main body, it has far-end, near-end and a single central lumen, the far-end of described handle main body is connected with joint, the near-end of described handle main body is connected with guider, and described seal wire extends in the described catheter body by the central lumen of described handle body.

12. ablation system according to claim 9, it is characterized in that described joystick comprises handle main body, it has far-end, near-end and a single central lumen, the far-end of described handle main body is connected with joint, the near-end of described handle main body is connected with guider, and described seal wire extends in the described catheter body by the central lumen of described handle body.

13. according to claim 1 or 2 or 3 described ablation systems, it is characterized in that the near-end of described handle main body also comprises a side opening, the near-end of described lead extends out by described side opening, is connected with plug.

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