CN202589653U - Double-direction controllable saline infusion type renal artery radiofrequency ablation catheter - Google Patents

Abstract

The utility model discloses a double-direction controllable saline infusion type renal artery radiofrequency ablation catheter which comprises an ablation electrode head, a sleeve and a control handle with a control valve connected sequentially. The ablation electrode head or the sleeve is provided with a saline infusion hole. Two traction wires are connected on both sides at the rear end of the ablation electrode head. The control handle is internally provided with a crown block. The two traction wires bypassing the crown block is further connected with the control valve. The control valve in the double-direction controllable saline infusion type renal artery radiofrequency ablation catheter provided by the utility model can control the ablation electrode head to bend bi-directionally. On the one hand, the catheter can enter the twisted or angled renal artery without rotating the catheter. On the other hand, the ablation electrode head attached to the wall of blood vessel in the multipoint ablation process can be ensured by the way of double-direction control, so that the double-direction controllable saline infusion type renal artery radiofrequency ablation catheter has the characteristic of strong operability. In addition, excess temperature of the ablation electrode head can be prevented by continuous saline infusion, and impedance increase caused by incrustation in the ablation position can be avoided, so that sympathetic nerves of the renal artery can be effectively removed, and the ablation safety is improved.

Description

A kind of two-way controlled perfusion of saline formula renal artery RF ablation conduit

Technical field

The present invention relates to a kind of two-way controlled perfusion of saline formula renal artery RF ablation conduit, belong to technical field of medical instruments.

Background technology

Hypertension is a kind of commonly encountered diseases and frequently-occurring disease, and adult's hypertension prevalence is near 20% more than 18 years old.Though it is a lot of to treat the medicine of hypertension at present, still have some people can not reach the target blood pressure.A plurality of clinical test results show, remove the kidney sympathetic nerve and can reach the hypertensive purpose of treatment, but up to the present, still do not have the method and apparatus of sophisticated removal kidney sympathetic fiber.Surgical resection kidney sympathetic nerve is adopted in early stage research, though can reach the purpose of blood pressure lowering, surgical injury is big, and complication is many.In recent years, the RF ablation renal artery is removed the orthosympathetic method of kidney and has been obtained preliminary clinical effectiveness.

The ablating electrode head of the RF ablation conduit that uses at present is through single draught line control, carries out bend in one direction only, and its shortcoming is: the first, and the renal artery that gets into serious distortion need be rotated operation, and this rotary manipulation is difficult to grasp and is prone to the injury blood vessel; The second, when the renal artery multiple spot melts, possibly influence the effect that melts because not good electrode tip and the blood vessel wall of causing of rotation is adherent bad.

In addition; Renal artery RF ablation conduit on the market all is non-perfusion of saline, and in the renal artery ablation procedure, the ablating electrode head temperature of conduit can constantly raise; Ablating electrode head peripheral blood produces and condenses; Cause ablation site formation incrustation and cause that impedance increases, the degree of depth that influence is melted makes it not thorough to the orthosympathetic removal of renal artery.

Summary of the invention

The invention is intended to provide a kind of two-way controlled perfusion of saline formula renal artery RF ablation conduit, have handling strong, melt thorough, safe characteristics, thereby can efficiently remove the renal artery sympathetic nerve.

The object of the invention can reach through following measure: a kind of two-way controlled perfusion of saline formula renal artery RF ablation conduit; Comprise successively ablating electrode head, the sleeve pipe that connects and have the joystick of control valve; The joystick rear end is data-interface and perfusion of saline mouth, is provided with the critesistor, impedance measuring lead and the radio-frequency current radiation end that are connected with data-interface in the said ablating electrode head; Both sides, said ablating electrode head rear end are connected with first traction fiber and second traction fiber; Joystick inside is provided with and lays respectively at control valve forward-and-rearward first fixed pulley and second fixed pulley; Said first traction fiber is connected with control valve after walking around first fixed pulley and second fixed pulley again, and second traction fiber is connected with control valve after walking around first fixed pulley; Said control valve can slide in the shift slot of joystick, and the slip of control valve can drive first traction fiber or second traction fiber is tightened or lax; Said ablating electrode head or sleeve pipe are provided with the perfusion of saline hole.

The technique scheme difference with the prior art is: the control valve among the present invention connects two traction fibers; Traction fiber can two-way control ablating electrode head; Need not carry out conduit rotation and can get into the renal artery of serious distortion, easy and simple to handle and can reduce blood vessel injury; The two-way control ablating electrode of control valve head in the renal artery multiple spot melts makes itself and blood vessel adherent better; In addition, the present invention is provided with the perfusion of saline hole, prevents that through the perfusion of saline that continues the temperature of ablating electrode head is too high, and the impedance of avoiding the ablation site incrustation to be caused increases, and then more effectively removes the renal artery sympathetic nerve, has improved the safety of melting.

Further, said sleeve pipe is divided into leading portion sleeve pipe and back segment sleeve pipe, 30～60 millimeters of said leading portion cover pipe ranges, the flexible pipe that diameter is 1.6～2.3 millimeters.Said leading portion sleeve pipe is that flexible pipe is processed, and has avoided injured blood vessel; Institute's leading portion casing diameter is less, can stretch in the thinner blood vessel wall.

Further, said sleeve pipe comprises cover outer tube layer, cover inner tube layer, is provided with the metal reinforcing mat between said cover outer tube layer and the cover inner tube layer; The metal reinforcing mat can increase telescopic intensity, prevents that it from breaking.

Further, said ablating electrode head be rustless steel process hemispherical or cylindric; Hemispherical or columned ablating electrode head and vascular wall shape meet more, can prevent its injury blood vessel wall.

Further, said perfusion of saline hole can be 2～6.

Description of drawings

Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further detailed explanation:

Fig. 1 is the structural representation of the two-way controlled perfusion of saline formula renal artery RFablation conduit embodiment 1 of the present invention;

Fig. 2 is the internal structure sketch map of ablating electrode head among Fig. 1;

Fig. 3 is the internal structure sketch map of joystick among Fig. 1;

Fig. 4 is to the crooked effect sketch map of the first traction fiber A among theembodiment 1;

Fig. 5 is to the crooked effect sketch map of the second traction fiber B among theembodiment 1.

The specific embodiment

With reference to Fig. 1, Fig. 2 and Fig. 3; A kind of two-way controlled perfusion of saline formula renal artery RF ablation conduit; Be connected with ablatingelectrode head 1,sleeve pipe 2,joystick 3 from front to back in turn; Saidjoystick 3 tail ends are provided with data-interface 32 and perfusion ofsaline mouth 33, radio-frequency current input port, thermistor signal output port, impedance signal output port are arranged, these data-interface 32 external RF ablation appearance in the said data-interface 32.

The hemispherical electrode tip that ablatingelectrode head 1 is processed for rustless steel, this ablatingelectrode head 1 are built-in with radio-frequency current radiation end 11, critesistor 12, impedance measuring lead 13.Radio-frequency current radiation end 11 is connected with radio-frequency current lead, radio-frequency current input port; Critesistor 12 is connected with thermal resistor wire, thermistor signal output port; Impedance measuring lead 13 1 ends and 1 welding of ablating electrode head, the other end is connected with the impedance signal output port.The both sides, rear end of this ablatingelectrode head 1 are welded with the first traction fiber A and the second traction fiber B.

Sleeve pipe 2 is divided into two sections of front and back, and leadingportion sleeve pipe 21 is connected with ablatingelectrode head 1, and backsegment sleeve pipe 22 is connected with joystick 3.Radio-frequency current lead, thermal resistor wire, impedance measuring lead 13, the first traction fiber A, the second traction fiber B, perfusion ofsaline pipe 24 have been placed in the sleeve pipe 2.Wherein, leadingportion sleeve pipe 21 is the flexible pipe of long 60mm, diameter 2.3mm, and leadingportion sleeve pipe 21 front ends have two perfusion ofsaline holes 23, and each perfusion ofsaline hole 23 is connected with perfusion ofsaline pipe 24, and perfusion ofsaline pipe 24 is connected with the perfusion ofsaline mouth 33 ofjoystick 3 rear ends; Saidsleeve pipe 2 is made up of cover outer tube layer, cover inner tube layer, is distributed with the metal reinforcing mat between this cover outer tube layer and the outer inner tube layer.

Joystick 3 comprises handle casing, and outer casing back connects data-interface 32 and perfusion ofsaline mouth 33, and said shell is provided with a plurality of shift slots, connectscontrol valve 31 in the control valve pool.As shown in Figure 1,control valve 31 is provided with the second from left retaining, the first from left retaining, neutral, a right retaining, right two retainings from front to back successively.As shown in Figure 3,joystick 3 enclosure are connected with the first fixed pulley C, the second fixed pulley D, lay respectively at the left and right sides of control valve 31.The first traction fiber A that extends out in thesleeve pipe 2 walks around the first fixed pulley C and the second fixed pulley D, and the tail end of the first traction fiber A is connected incontrol valve 31 right-hand members then; The second traction fiber B walks around the first fixed pulley C, and its tail end is connected oncontrol valve 31 left ends.

As shown in Figure 1,control valve 31 is positioned at the neutral position.As shown in Figure 4;Control valve 31 is positioned at the first from left retaining; Control valve drives that the first traction fiber A tightens, the second traction fiber B is lax, and ablatingelectrode head 1 is bent towards the first traction fiber A, one lateral bending, by that analogy; Before push awaycontrol valve 31 to the second from left retaining once more, ablatingelectrode head 1 is bigger to the crooked angle of the first traction fiber A.Otherwise; As shown in Figure 5:control valve 31 is to a right retaining; Thecontrol valve 31 drives second traction fiber B tightens, the first traction fiber A is lax, and ablatingelectrode head 1 is bent towards the second traction fiber B, one lateral bending, by that analogy; Pushercontrol valve 31 to the second from left keeps off once more, and ablatingelectrode head 1 is bigger to the crooked angle of the second traction fiber B.

Embodiment 2: be that withembodiment 1 difference said perfusion ofsaline hole 23 is opened on ablatingelectrode head 1, perfusion ofsaline pipe 24 stretches in the ablatingelectrode head 1 and is connected with perfusion ofsaline hole 23, and all the other characteristics are identical withembodiment 1.

Concrete use: during use, data-interface 32 external RF ablation appearance, the 33 external saline input equipment of perfusion of saline mouth.Under the guiding of X line perspective, incite somebody to action the renal artery opening that this two-way controlled perfusion of saline formula renal artery RF ablation conduit is sent into patient through femoral artery.When ablatingelectrode head 1 twists because of renal artery or becomes the angle to be difficult for getting into; Do not need rotary guide pipe; Directly the 31 control ablatingelectrode heads 1 of the control valve on theadjustment joystick 3 get into corresponding ablation site; Can stircontrol valve 31 to different shift slots according to actual needs in the art, make ablatingelectrode head 1 be attached at arteriorenal blood vessel wall preferably.

In whole ablation procedure, continue the perfusion normal saline through perfusion ofsaline mouth 33 with certain speed, temperature and impedance in the RF ablation appearance monitoring renal artery, the ablation parameter of setting RF ablation appearance realizes that finally renal artery carries out the multiple spot RF ablation.

Above-described only is preferred implementation of the present invention; Should be understood that; For a person skilled in the art, under the prerequisite that does not break away from structure of the present invention, can also make some distortion and improvement; These also should be regarded as protection scope of the present invention, and these can not influence effect and practical applicability that the present invention implements.

Claims (5)

1. two-way controlled perfusion of saline formula renal artery RF ablation conduit; Comprise successively ablating electrode head, the sleeve pipe that connects and have the joystick of control valve; The joystick rear end is data-interface and perfusion of saline mouth, it is characterized in that: be provided with the critesistor, impedance measuring lead and the radio-frequency current radiation end that are connected with data-interface in the said ablating electrode head; Both sides, said ablating electrode head rear end are connected with first traction fiber and second traction fiber; Joystick inside is provided with and lays respectively at control valve forward-and-rearward first fixed pulley and second fixed pulley; Said first traction fiber is connected with control valve after walking around first fixed pulley and second fixed pulley again, and second traction fiber is connected with control valve after walking around first fixed pulley; Said control valve can slide in the shift slot of joystick, and the slip of control valve can drive first traction fiber or second traction fiber is tightened or lax; Said ablating electrode head or sleeve pipe are provided with the perfusion of saline hole.

2. a kind of two-way controlled perfusion of saline formula renal artery RF ablation conduit according to claim 1, it is characterized in that: said sleeve pipe is divided into leading portion sleeve pipe and back segment sleeve pipe, 30～60 millimeters of said leading portion cover pipe ranges, the flexible pipe that diameter is 1.6～2.3 millimeters.

3. a kind of two-way controlled perfusion of saline formula renal artery RF ablation conduit according to claim 1 is characterized in that: said sleeve pipe comprises cover outer tube layer, cover inner tube layer, is provided with the metal reinforcing mat between said cover outer tube layer and the cover inner tube layer.

4. a kind of two-way controlled perfusion of saline formula renal artery RF ablation conduit according to claim 1 is characterized in that: said ablating electrode head be rustless steel process hemispherical or cylindric.

5. a kind of two-way controlled perfusion of saline formula renal artery RF ablation conduit according to claim 1, it is characterized in that: said perfusion of saline hole is 2～6.

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