CN201591623U

CN201591623U - Radio frequency ablation catheter for curing atrial fibrillation

Info

Publication number: CN201591623U
Application number: CN2010200269636U
Authority: CN
Inventors: 陈爱华; 宋旭东
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-01-19
Filing date: 2010-01-19
Publication date: 2010-09-29
Anticipated expiration: 2020-01-19

Abstract

The utility model discloses a radio frequency ablation catheter for curing atrial fibrillation. The radio frequency ablation catheter comprises an annular radio frequency ablation electrode (5) and a puncture catheter (2). The utility model is characterized in that the radio frequency ablation catheter also comprises a flexible annular ball (1); the wall of the annular ball (1) is symmetrically provided with a water inlet pipe (3) and a water outlet pipe (4) communicated with the annular ball (1); the radio frequency ablation electrode (5) is arranged inside the annular ball (1); a radio frequency transmission line (7) of the radio frequency ablation electrode (5) extends out through the water inlet pipe (3) and the water outlet pipe (4); and the water inlet pipe (3) and the water outlet pipe (4) penetrate through the catheter (2). The radio frequency ablation catheter is capable of obtaining a continuous ablation line and also avoiding thermal damage to human tissues during ablation.

Description

A kind of radio-frequency (RF) ablation conduit for the treatment of atrial fibrillation

Technical field

This utility model relates to and a kind ofly transmits the surgical device of the energy of on-mechanical form to human body, is specifically related to adopt electrode to make high frequency electric pass through the ablation catheter of tissue to be heated.

Background technology

Atrial fibrillation (atrial fibrillation) is called for short atrial fibrillation, is that intra-auricular a kind of electricity is unusual, i.e. common arrhythmia clinically.Therefore medicine is the basis for the treatment of irregular heart pulse, but the present situation of treatment is quite undesirable, the patients with atrial fibrillation that a large amount of antiarrhythmic drugs fails to respond to any medical treatment is arranged then accepts catheter ablation treatment.The principle of radio-frequency (RF) ablation catheter treatment atrial fibrillation is that the heat effect of using radio-frequency current makes tissue dewatering dry, in addition solidify, downright bad, carbonization, thereby eliminate pathological tissues and reach the purpose of treatment.Compare with Drug therapy, the sharpest edges of catheter ablation art success are atrial fibrillation thoroughly can be eradicated, so the radio-frequency (RF) ablation conduit has become the focus of industry research.The application for a patent for invention that is disclosed as CN 101190146A and Granted publication number disclose the different ablation catheter of radio-frequency ablation electrode structure respectively for CN 200954136Y and CN 201223445Y utility model patent, wherein, the main distinction of CN 101190146A application for a patent for invention is characterised in that, its radio-frequency ablation electrode is at least 2 and the formation petal-shaped that distributes, to realize " the successive circumferential ablation of multiple spot "; The main distinction of CN 200954136Y utility model patent is characterised in that the far-end of its radio-frequency ablation electrode is the rubber-like annular, to realize " loop wire melts "; The main distinction of CN 201223445Y utility model patent is characterised in that, its radio-frequency ablation electrode adopts the manufacturing of low temperature memorial alloy, reverts to the conical two umbrellas with the bottom under the condition of body temperature, with to " the vein vestibular portion goes in ring and melts ".By above concise and to the point description as seen, different technical schemes has been adopted in three patent applications, all solve linear electrode and be easy to generate the discontinuous and eclipsed technical problem of ablation points of ablation line, but describedly still there is following deficiency respectively, the described technical scheme of CN 101190146A application for a patent for invention will make many radio-frequency ablation electrodes distribute in the vein vestibule and form petal-shaped, described electrode just must have certain elasticity, it just very easily damages patient's organ-tissue in forming petal-like process so, simultaneously, also there is the discontinuous defective of ablation line; The described electrode of CN200954136Y utility model patent scheme also must have elasticity, and it also is foreseeable may causing damage to patient's organ-tissue; The design of the described electrode of CN 200954136Y utility model patent scheme is very ingenious, but complex structure not only, and the price of material is also very expensive, and especially described electrode just may refresh memory influence puncture procedure before arriving the ring orifices of pulmonary veins by very long femoral vein.In addition, above-mentioned three described radio-frequency ablation electrodes of patent application be expose and do not have any protective measure, the heat that is produced in the ablation procedure is easy to organize outside the lesion ablation district.Granted publication number is isolated zone of ablation and ultrasonic transducer for the utility model patent scheme of CN 2462972Y adopts in the circulating water pocket aqueous medium, preferably resolve the technical problem of organizing the hot injury outside the zone of ablation, but described water pocket is spherical, there is following deficiency unavoidably, the one, bigger with the atrium contact area, the damage that is caused is also relatively large, and the 2nd, cause orifices of pulmonary veins to stop up easily and influence blood circulation.

Summary of the invention

In view of there is above-mentioned deficiency in prior art, technical problem to be solved in the utility model provides the radio-frequency (RF) ablation conduit of a kind of hot injury's of avoiding the successive treatment atrial fibrillation of ablation line.

The technical scheme that this utility model addresses the above problem is:

A kind of radio-frequency (RF) ablation conduit for the treatment of atrial fibrillation, it comprises the conduit of annular radio-frequency ablation electrode and puncture, it is characterized in that, also comprises the ring type sacculus of a flexibility, is arranged with the water inlet pipe and the outlet pipe that are communicated with the ring type sacculus on the cyst wall of this ring type sacculus; Described radio-frequency ablation electrode is located in the ring type sacculus, and its radio-frequency transmission line passes through water inlet pipe or outlet pipe.

In order further to improve the anti-hot injury's of this utility model effect, be provided with the flexible support that supports radio-frequency ablation electrode in the described ring type sacculus, this flexible support is made up of at least 3 lines that are evenly distributed on the radio-frequency ablation electrode, wherein said each root line middle part is fixed on the radio-frequency ablation electrode, two is separately fixed on the inwall of ring type sacculus, just tensioning of described line when being full of water in the ring type sacculus is supported on annular radio-frequency ablation electrode at the center of ring type sacculus.

Radio-frequency (RF) ablation conduit described in the utility model wherein, is provided with temperature sensor in the described ring type sacculus, and the holding wire of this pick off passes through water inlet pipe or outlet pipe; Post the mapping electrode on the outer wall of described ring type sacculus, the data wire of this mapping electrode also passes through water inlet pipe or outlet pipe.

Because technical scheme described in the utility model is designed to annular with water pocket, and adopt flexible support with annular radio-frequency ablation electrode be supported on the ring type sacculus in, therefore have following beneficial effect:

1, utilize the tension force that is produced when being full of water in the ring type sacculus annular radio-frequency ablation electrode to be supported on the center of ring type sacculus dexterously, therefore use softish plain conductor also can obtain circular radio-frequency ablation electrode, with also utilizing aqueous medium that radio-frequency ablation electrode and zone of ablation are isolated reliably, avoid the hot injury of tissue outside the zone of ablation effectively.

2, the advantage of the more spherical water pocket of ring type sacculus is obvious, and the one, little with the atrium contact area, the damage that is caused is also less relatively, and the 2nd, can not cause orifices of pulmonary veins to stop up.

3, water inlet pipe and outlet pipe symmetry are located on the cyst wall, tension force after utilizing ring type sacculus and water inlet pipe and outlet pipe being full of water makes water inlet pipe relative with outlet pipe strong, thereby can realize adjusting ring type sacculus angle of inclination by pushing away or draw in water pipe and outlet pipe respectively, and then the radio-frequency ablation electrode of adjustable collar shape reaches the consistent as far as possible purpose of depth of ablation with the distance of zone of ablation.

Description of drawings

Fig. 1 and Fig. 2 are the structural representation of a specific embodiment of the present utility model under full (the being full of water) state of ring type sacculus, water inlet pipe and outlet pipe, and wherein, Fig. 1 is a front view, Fig. 2 left view.

Fig. 3 is for adjusting the sketch map of ring type sacculus spatial attitude among the embodiment illustrated in figures 1 and 2, and double dot dash line is an intermediateness in the adjustment process among the figure.

Fig. 4～Fig. 7 is the cut-away view of ring type sacculus among the embodiment illustrated in figures 1 and 2, wherein Fig. 4 is front view (vertical center line along Fig. 5 is analysed and observe), Fig. 5 is the A-A cutaway view of Fig. 4, and Fig. 6 is the enlarged drawing of local I among Fig. 4, and Fig. 7 is a B-B profile among Fig. 5.

The specific embodiment

Referring to Fig. 1 and Fig. 2, ring type sacculus 1 is the annular of 3mm for caliber, and the formed circle diameter in full back is 40mm, is arranged with the water inlet pipe 3 and the outlet pipe 4 that are communicated with ring type sacculus 1 on the end face of annulus; Conduit 2 adopts medical macromolecular materials to make.Described ring type sacculus 1, water inlet pipe 3 and outlet pipe 4 all adopt softish medical macromolecular materials to make, but folding becomes as referring to state shown in Figure 3, delivers to the patient atrium so that in operation process they are drawn in conduit 2 through the epitheca pipe before not full.

Referring to Fig. 4～Fig. 7, radio-frequency ablation electrode 5 is an annular, and its girth equals the length of ring type sacculus 1 annular center line; Flexible support is made up of three lines 11, and three line 11 uniform distribution also are looped around on the annular radio-frequency ablation electrode 5, and two heat seal respectively is bonded on the inwall of ring type sacculus 1, and it is long to be just in time tensioning (as shown in Figure 7) when ring type sacculus 1 fills.Described line 11 all adopts the soft macromolecule medical material identical with ring type sacculus 1 to make, so that adopt the method for heat seal to be bonded on the inwall of ring type sacculus 1.

In this example, post mapping electrode 11 (as shown in Figure 1) on the outer surface of ring type sacculus 1, the radio-frequency transmission line 7 of its data wire 8 and radio-frequency ablation electrode 5 all passes (as shown in Figure 6) through going out water inlet pipe 3; Be provided with thermocouple temperature sensor 6 in the ring type sacculus 1, it is pasted on the inwall of ring type sacculus 1, and its holding wire 9 passes (see figure 4) through outlet pipe 4; Water inlet pipe 3 and outlet pipe 4 are located in the conduit 2.

Briefly introduce the using method of radio-frequency (RF) ablation conduit described in the utility model below in conjunction with accompanying drawing.

Select femoral vein to puncture, earlier under the guiding of X-ray, the epitheca pipe is delivered to right atrium, again 1 folding of ring type sacculus is become shown in Fig. 3 solid line state to draw in the endoporus of sheath pipe 2 and deliver to left atrium through the epitheca pipe, then, radio-frequency transmission line 7 and data wire 8 are connected with radiofrequency generator respectively, holding wire 9 and physiology polygraph are connected, and it is full with ring type sacculus 1, water inlet pipe 3 and outlet pipe 4 to start the perfusion of saline pump at last; After ring type sacculus 1, water inlet pipe 3 and outlet pipe 4 are filled, under X line and the supervision of physiology polygraph, carry out the operation of push-and-pull water inlet pipe 3 and outlet pipe 4, adjust when the angle of inclination of ring type sacculus 1 can start radiofrequency generator the patient is carried out ablation.

Claims

1. radio-frequency (RF) ablation conduit for the treatment of atrial fibrillation, it comprises the conduit (2) of annular radio-frequency ablation electrode (5) and puncture, it is characterized in that, the ring type sacculus (1) that also comprises a flexibility is arranged with the water inlet pipe (3) and the outlet pipe (4) that are communicated with ring type sacculus (1) on the cyst wall of this ring type sacculus (1); Described radio-frequency ablation electrode (5) is located in the ring type sacculus (1), and its radio-frequency transmission line (7) passes through water inlet pipe (3) or outlet pipe (4), and water inlet pipe (3) and outlet pipe (4) are located in the conduit (2).

2. a kind of radio-frequency (RF) ablation conduit for the treatment of atrial fibrillation according to claim 1, it is characterized in that, be provided with the flexible support (11) that supports radio-frequency ablation electrode (5) in the described ring type sacculus (1), this flexible support (11) is made up of at least 3 lines that are evenly distributed on the radio-frequency ablation electrode (5), wherein said each root line middle part is fixed on the radio-frequency ablation electrode (5), two is separately fixed on the inwall of ring type sacculus (5), just tensioning of described line when being full of water in the ring type sacculus (1) is supported on annular radio-frequency ablation electrode (5) at the center of ring type sacculus (1).

3. a kind of radio-frequency (RF) ablation conduit for the treatment of atrial fibrillation according to claim 1 and 2 is characterized in that, is provided with temperature sensor (6) in the described ring type sacculus (1), and the holding wire of this pick off (8) passes through water inlet pipe (3) or outlet pipe (4).

4. a kind of radio-frequency (RF) ablation conduit for the treatment of atrial fibrillation according to claim 1 and 2, it is characterized in that, post mapping electrode (10) on the outer wall of described ring type sacculus (1), the data wire (9) of this mapping electrode (10) passes through water inlet pipe (3) or outlet pipe (4).

5. a kind of radio-frequency (RF) ablation conduit for the treatment of atrial fibrillation according to claim 3, it is characterized in that, post mapping electrode (10) on the outer wall of described ring type sacculus (1), the data wire (9) of this mapping electrode (10) passes through water inlet pipe (3) or outlet pipe (4).