CN201642315U - Radio frequency ablation electrode - Google Patents

Abstract

The utility model provides a radio frequency ablation electrode, which comprises a guide pin and an electrode pin. The electrode pin in a double-layer structure is capable of sliding along the guide pin; the electrode includes an injection shock tube and a central electrode pin from outside to inside; the injection shock tube comprises a tubular body, one portion of the body extends into the guide pin and is fixedly connected with the central electrode pin, and the rest portions of the body extend out of the guide pin and are provided with fluid outlet holes; and the central electrode pin is in full-length arrangement along the length direction of the guide pin, and a pinpoint portion of the central electrode pin is exposed out of the injection shock tube. The radio frequency ablation electrode solves the problem that surrounding electrodes affect radio frequency treatment when an individual solid tumor with higher hardness is treated, and since the electrode pin adopts the double-layer structure and fluid can be injected by using a gap between layers, the fluid can soften tumors and improve high-frequency thermal conducting capacity of tumor tissues so as to achieve expected treatment effects.

Description

A kind of radio-frequency ablation electrode

Technical field

This utility model relates to medical apparatus and instruments, particularly a kind of radio-frequency ablation electrode.

Background technology

RFA series multi-pole rf tumour ablation electrode is the auxiliary electrode that the application people produces for the design of RFA multi-pole rf tumour ablation system, is specially adapted to position tumors such as liver, lung are treated.

The basic structure of RFA series multi-pole rf tumour ablation electrode comprises contreelectrode pin 1, surround electrode pin 2 (sub-pin),guide pin 3,guide pin seat 4,rail plate 5,sliding handle 6, back fixed handle 7, precedingfixed handle 8,plug 9,cable 10 and medicine-pouringport 11 as shown in Figure 1.

During use this electrode is connected on the multi-pole rf tumour ablation treating instrument, the tip by electrode enters tissue, utilizes the high frequency alternating current to produce heat energy, kill tumor cell.Because the surround electrode pin (sub-pin) of this radio frequency tumour electrode is to be bent by the rubber-like metal material to make, can insert smoothly for most of body tumor tissues, but some tumor tissues is harder, and sub-pin inserts difficulty, perhaps inserts the sub-pin in back and is out of shape serious, depart from and normally open shape, the effect of influence treatment, after treatment finished, it is harder that not only harder tumor tissues can become, and sub-pin is recovered to guide pin inside also can encounters difficulties, thereby the smooth process of influence operation.

Summary of the invention

The purpose of this utility model is to insert difficulty or can not smooth opening at the sub-pin of umbrella surround electrode that above-mentioned prior art exists, influence the defective of therapeutic effect, a kind of radio-frequency ablation electrode is provided, has had the smooth and good advantage of therapeutic effect of plug, solved clinical needs.

The technical scheme taked of this utility model is to achieve these goals: a kind of radio-frequency ablation electrode, comprise guide pin and electrode, described electrode is double-deck and can slides along described guide pin, described electrode comprises injection floral tube and central electrode pin from outside to inside, described injection floral tube comprises piped body, the part of body stretches into the inside of described guide pin and fixedlys connected with described central electrode pin, the remainder of body stretches out described guide pin and this part is provided with liquid outlet, described central electrode pin is along the elongated setting of described guide pin length direction, and its needle tip exposes described injection floral tube.

As preferably, the body that stretches into the described injection floral tube of described catheter interior is provided with semicircle opening, and described injection floral tube welds by described semicircle opening and described central electrode pin.

In order to guarantee that fluid is even, the liquid outlet on the described injection floral tube is a plurality of and card interval unanimity.

The beneficial effects of the utility model are: this utility model on the basis of existing technology, removed original umbrella sub-electrode pin, solved when the higher entity tumor of the indivedual hardness of treatment, the surround electrode pin influences the problem of radio-frequency (RF) therapy, and the electrode needle that will insert tumor changes double-decker into, utilize bedding void to inject normal saline, normal saline can play softening tumor, increase the tumor tissues high frequency capacity of heat transmission, reaches desired therapeutic effect.

Description of drawings

Fig. 1 is the structure chart of RFA series multi-pole rf tumour ablation electrode described in the prior art;

Fig. 2 is the structure chart of radio-frequency ablation electrode described in the utility model;

Fig. 3 is the enlarged drawing of A among Fig. 2;

Fig. 4 is a fundamental diagram of the present utility model.

Among the figure: fixed handle, 9 plugs, 10 cables, 11 medicine-pouring ports, 12 injection floral tubes, 12.1 liquid outlets, 12.2 semicircle openings before 1 contre electrode pin, 2 surround electrode pins, 3 guide pins, 4 guide pin seats, 6 sliding handles, 5 rail plates, the 7 back fixed handles, 8.

The specific embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments, but not as to qualification of the present utility model.

As shown in Figure 2, a kind of radio-frequency ablation electrode and electrode structure basically identical of the prior art, it improves at the electrode needle position, as shown in Figure 3, Figure 4, this utility model has removed original surround electrode pin (being sub-pin) betweenguide pin 3 front ends andcontre electrode pin 1, has welded an injectionfloral tube 12 that plays the fluid injection shunting.As shown in Figure 5, described injectionfloral tube 12 comprises piped body, body one end of injectionfloral tube 12 is processed into semicircle opening 12.2, firmly weld withcontre electrode pin 1 herein, noting keeping complete circle tube opening place during welding does not weld, assurance flowing water is unimpeded, and the other end has been processed consistent at interval liquid outlet 12.1, makes water outlet as far as possible evenly.Because the external diameter of injectionfloral tube 12 and the internal diameter ofguide pin 3 are to be slidingly matched, the gap is less, inject liquid such as normal saline from medicine-pouring port during work, normal saline flows between the slit ofguide pin 3 andcontre electrode pin 1 earlier after entering electrode, arrive injectionfloral tube 12 places, most of liquid flows into injectionfloral tube 12 inside from the semicircle opening 12.2 of injectionfloral tube 12, from its front opening or apopore, flow out again, evenly arrive each position of tumor, utilize the high frequency alternating current to produce heat energy, kill tumor cell again.

At some patient at present clinical because the position or the shape of tumor are special, be not suitable for or dangerous with former ablating electrode, in the time of can not carrying out the radio-frequency (RF) ablation operation, this utility model replenishes as the multi-pole rf ablating electrode, utilize liquid favorable conductive, heat transfer property, by normal saline being injected the sufferer tumor tissues, softening tumor tissues, increase its high frequency capacity of heat transmission, can carry out effective radio-frequency (RF) therapy to some privileged sites, special shape and indivedual higher entity tumor of hardness, the kill tumor cell has solved clinical needs.

Above-described embodiment, this utility model specific embodiment a kind of more preferably just, the common variation that those skilled in the art carries out in the technical solutions of the utility model scope and replacing all should be included in the protection domain of the present utility model.

Claims (3)

1. radio-frequency ablation electrode, comprise guide pin and electrode, it is characterized in that: described electrode also can slide along described guide pin for double-deck, described electrode comprises injection floral tube and central electrode pin from outside to inside, described injection floral tube comprises piped body, the part of body stretches into the inside of described guide pin and fixedlys connected with described central electrode pin, the remainder of body stretches out described guide pin and this part is provided with liquid outlet, described central electrode pin is along the elongated setting of described guide pin length direction, and its needle tip exposes described injection floral tube.

2. radio-frequency ablation electrode according to claim 1 is characterized in that: the body that stretches into the described injection floral tube of described catheter interior is provided with semicircle opening, and described injection floral tube is by described semicircle opening and the welding of described central electrode pin.

3. radio-frequency ablation electrode according to claim 1 and 2 is characterized in that: the liquid outlet on the described injection floral tube is a plurality of and consistent at interval.

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