CN1935099A - Orbital radio frequency melting catheter - Google Patents

Abstract

The present invention discloses an orbital radio frequency melting catheter device capable of making quick linear radio frequency melting therapy in the chambers of heart. It is characterized by that it has a catheter body, its far-end is equipped with an electrode, and its near-end is connected with a locking device and a radio frequency cable. In the centre of the described catheter body a central hole coaxial with external edge of said catheter body is opened, in said central hole interior an elastic orbital guide wire is set, and the far-end of said elastic orbital guide wire is made into the form of ring.

Description

Orbital radio frequency melting catheter

Technical field

The present invention relates to a kind of medical apparatus and instruments, particularly a kind of electrode catheter that is used for disease treatment.

Background technology

The radio-frequency ablation electrode conduit is used for heart is carried out ARR electric physiology mapping, cardiac temporary pacing and radio-frequency (RF) ablation.This Therapeutic Method had both avoided patient to open the hardship of breast, again can radical curing of disease, and do not stay any severe complication, obtain wide model at home and abroad clinically and use.

Electrode catheter comprises two parts, the one, and far-end has the conduit of varying number electrode, and the 2nd, the external prolongation cable of connection physiograph or radiofrequency generator.Electrode catheter has the skin through human body, the different parts that blood vessel is placed into heart, can reliable recording the bipolar or one pole signal of telecommunication in the chambers of the heart, simultaneously external electricity irritation impulsion or radio-frequency (RF) energy are reached the basic function in the heart.

From last century arrhythmia such as 80-90 age catheter ablation treatment paroxysmal supraventricular tachycardia achieve success so far, complicated arrhythmia, after one's own heart the therapeutic effect that waits of atrial fibrillation moving (atrial fibrillation) is still waiting improvement, since around discovery atrial fibrillations 90% such as French scholar Haissaguerre in 1999 originate from orifices of pulmonary veins, catheter ablation treatment atrial fibrillation has been obtained breakthrough, when doctor (scholar) carries out catheter ablation treatment atrial fibrillation at present, adopt the upper and lower orifices of pulmonary veins of double-ring mapping electrode mapping.Recent years, several producers of the U.S. such as Johnson ﹠ Johnson and IBI company have released cool brine perfusion radio-frequency (RF) ablation conduit, and Boston company has then released cooling type radio-frequency (RF) ablation conduit.In conjunction with advanced three-dimensional mapping system or intracardiac ultrasonic techniques such as Carto, EnSite3000, use pulmonary vein annular mapping conduit and cool brine perfusion radio-frequency (RF) ablation conduit, can carry out atrial fibrillation and melt.Yet even at more American-European famous electric physiology centers, it is still lower that present atrial fibrillation melts success rate, and relapse rate is up to 20%-30%.Trace it to its cause, existing ablation catheter only can the pointwise mapping melt, and can not guarantee the ablation line seriality, moreover time-consuming.In addition, adopt this Therapeutic Method price high.

Summary of the invention.

The purpose of this invention is to provide a kind of orbital radio frequency melting catheter, the technical problem that solve is to carry out quick linear radio frequency melting therapy in the chambers of the heart.

The present invention is by the following technical solutions: a kind of orbital radio frequency melting catheter, has catheter body, the catheter body far-end is provided with electrode, near-end is connected with locking device and radio-frequency cable, described catheter body center has and the co-axial centre bore of catheter body outer rim, be provided with the elastic track seal wire in the centre bore, the far-end of track seal wire is ring-like.

The distal end of track seal wire of the present invention is with the soft head of track.

The soft head of track of the present invention constitutes for the stack of spiral spring circle, and the end is provided with and is hemispheric block.

Track seal wire head end diameter of the present invention is less than track guidewire body size, and the external diameter and the track guidewire body of the soft head of track are measure-alike.

The electrode of catheter body far-end of the present invention is a ring-type, is arranged on the catheter body outer circumference.

The utmost point of the present invention is two to four.

Electrode of the present invention is positioned at first electrode of far-end along the long 4-8mm of catheter body axis, the long 1-2mm of other electrode.

The electrode of catheter body far-end of the present invention each with copper conductor one end welding, first electrode is connected to the temperature measuring head of thermocouple simultaneously, the other end of copper conductor and thermometric line through centre bore to near-end; The near-end of catheter body is equipped with the three way cock of tight device with lock, and the track seal wire passes through from centre bore, after copper conductor and thermocouple temperature measurement line pass through from side opening, is connected with radiofrequency generator by adapter, prolongation cable.

The diameter of track seal wire of the present invention is 0.3-0.6mm, and the diameter of its head end is 0.08-0.2mm, and length is 1-5cm, and ring-like internal diameter is 12-30mm; The internal diameter of catheter body is 0.35-0.8mm.

Track seal wire of the present invention adopts nitinol alloy wire, and catheter body adopts polyamine fat, nylon or PEBAX conduit, and electrode adopts platinum or platinumiridio.

The present invention compared with prior art, the catheter body center has and the co-axial centre bore of catheter body outer rim, the track seal wire orifices of pulmonary veins that reclines is tight, catheter body is by the ring-like propelling of its centre bore along the elastic track wire distal, can carry out quick ring-type linear ablation, ablation points does not have omission continuously, and operation rapidly, it is complete to melt circle, the success rate height.

Description of drawings

Fig. 1 is the structural representation of orbital radio frequency melting catheter embodiment of the present invention.

Fig. 2 is the seal wire head end sketch map of the embodiment of the invention.

Fig. 3-1 is the circular orbit mould sketch map of the embodiment of the invention.

The left view of Fig. 3-2 Fig. 3-1.

Fig. 4 is the circular orbit sketch map of the embodiment of the invention.

Fig. 5 is the turn sketch map of the embodiment of the invention.

Fig. 6 is the catheter body structural representation of the embodiment of the invention.

Fig. 7-1 is prolongation cable () sketch map of the embodiment of the invention.

Fig. 7-2 is prolongation cable (two) sketch map of the embodiment of the invention.

The specific embodiment

Below in conjunction with drawings and Examples the present invention is described in further detail.As shown in Figure 1, orbital radio frequency melting catheter of the present invention has the Nitinol wiretrack seal wire 1 of elastic material, thetrack seal wire 1 outer macromolecularmaterial catheter body 2 that is with, macromolecularmaterial catheter body 2 is provided withplatinum electrode 3,platinum electrode 3 connects thermocouple and copper conductor, andcatheter body 2 near-ends are connected withadapter 6.

As shown in Figure 6,platinum electrode 3 is to be made by platinum or platinumiridio, be ring-type, be arranged on macromolecularmaterial catheter body 2 outer circumference, two or four electrodes are housed on the conduit usually, and first electrode that is positioned at far-end is used for radio-frequency (RF) ablation along the long 4-8mm ofcatheter body 2 axis, the long 1-2mm of other electrode is used to diagnose mapping.

As shown in Figure 2, as most preferred embodiment,track seal wire 1 by diameter be 0.3-0.6mm, nitinol alloy wire with elastic performance makes,head end 7 diameters of its alloy silk are less thantrack seal wire 1 size of main body, it is 0.08-0.2mm thathead end 7 is milled to diameter through centerless grinder, and length is 1cm-5cm.As shown in Figure 4, be ring-like 8 shapes behind thehead end 7 oftrack seal wire 1, ring-like 8 internal diameter is 12-30mm, be with the turn track made by rustless steel, platinum or gold soft 9 atlevigated head end 7, the length that track is soft 9 is 1-5cm, suitable with the length ofhead end 7, its external diameter is identical withtrack seal wire 1, and the soft degree that track is soft 9 is as the criterion not damage human vas.As shown in Figure 5, soft 9 on track is spiral spring circle stack formation, and the end is provided with and is hemispheric block 10.Shown in Fig. 3-1 and Fig. 3-2,track seal wire 1 ring-like 8 when coiling, on ring mould, adopt heat treatment process to form then trackseal wire 1.

As shown in Figure 6,catheter body 2 is made by medical macromolecular materials, as polyamine fat, nylon or polyesteramide PEBAX,catheter body 2 centers have and the co-axial centre bore 10 ofcatheter body 2 outer rims, the aperture ofcentre bore 10 is greater thantrack seal wire 1,catheter body 2 is slided alongtrack seal wire 1, and this body with common radio-frequency (RF) ablation conduit is different.As preferred forms, the internal diameter ofcatheter body 2 is 0.35-0.8mm.

The welding of copper conductor one end and far-end platinum electrode, the other end through the centre bore 10 ofcatheter body 2 to near-end, welded together with adapter, the signal of electrode collection can be sent out, or extraneous radio frequency electricity is delivered to the chambers of the heart; The temperature measuring head of thermocouple is contained in first ofplatinum electrode 3 far-ends and extremely goes up, the thermometric line through the centre bore 10 ofcatheter body 2 to near-end; The near-end ofcatheter body 2 is equipped with the Y-type threeway type joint 4 of a tight device with lock,track seal wire 1 passes through from centre bore, after copper conductor and thermocouple temperature measurement line pass through from side opening, welded together withfast plugging adapter 6, shown in Fig. 7-1, Fig. 7-2, byadapter 6, withprolong cable 5 and be connected with radiofrequency generator.

When carrying out the operation of atrial fibrillation radio-frequency (RF) ablation, percutaneous, blood vessel, the atrial septal puncture art, thetrack seal wire 1 of orbital radio frequency melting catheter of the present invention enters left room through guiding sheath pipe, under X ray monitors, at first push thetrack seal wire 1 of this device, slowly push seal wire and go out to guide the sheath pipe, the track seal wire is fixed to annular because of heat treatment, in the chambers of the heart, the track seal wire recovers its annular shape gradually along with the propelling movement of seal wire, under X ray monitors, deliver to the orifices of pulmonary veins that need melt, recline fully at orifices of pulmonary veins until circular orbit, bylocking device 11 lockingtrack seal wires 1, the track seal wire is fixed then, first electrode that pushescatheter body 2 again is to orifices of pulmonary veins, carry out radio-frequency (RF) ablation, whenever melt a bit, catheter body is along the track seal wire, push ahead a distance that melts cicatrix, surgical doctor is easy to finish a complete linear ablation, and ablation points is continuous, does not have and omits; After operation is finished, unclamp locking device, withdraw fromcatheter body 2, withdraw from the track seal wire again.Use orbital radio frequency melting catheter of the present invention, it is tight to have a track seal wire orifices of pulmonary veins that reclines, and can carry out the advantage of quick ring-type linear ablation, operation rapidly, it is complete to melt circle, success rate height, and reduce greatly than present surgery cost.

Claims (10)

1. orbital radio frequency melting catheter, has catheter body (2), catheter body (2) far-end is provided with electrode (3), near-end is connected with locking device and radio-frequency cable, it is characterized in that: described catheter body (2) center has and the co-axial centre bore of catheter body (2) outer rim (10), be provided with elastic track seal wire (1) in the centre bore (10), the far-end of track seal wire (1) is ring-like (8).

2. orbital radio frequency melting catheter according to claim 1 is characterized in that: the distal end of described track seal wire (1) is with the soft head of track (9).

3. orbital radio frequency melting catheter according to claim 2 is characterized in that: the soft head of described track (9) constitutes for the stack of spiral spring circle, and the end is provided with and is hemispheric block (10).

4. orbital radio frequency melting catheter according to claim 3 is characterized in that: described track seal wire (1) head end (7) diameter is less than track seal wire (1) size of main body, and the external diameter of the soft head of track (9) is identical with track seal wire (1) size of main body.

5. according to claim 1,2,3 or 4 described orbital radio frequency melting catheters, it is characterized in that: the electrode (3) of described catheter body (2) far-end is ring-type, is arranged on catheter body (2) outer circumference.

6. orbital radio frequency melting catheter according to claim 5 is put, and it is characterized in that: described electrode (3) is two to four.

7. orbital radio frequency melting catheter according to claim 6 is characterized in that: described electrode (3) is positioned at first electrode of far-end along the long 4-8mm of catheter body (2) axis, the long 1-2mm of other electrode.

8. orbital radio frequency melting catheter according to claim 7, it is characterized in that: each welds the electrode (3) of described catheter body (2) far-end with copper conductor one end, simultaneously first electrode is connected to the temperature measuring head of thermocouple, the other end of copper conductor and thermometric line through centre bore (10) to near-end; The near-end of catheter body (2) is equipped with the three way cock (4) of tight device with lock, and track seal wire (1) passes through from centre bore, after copper conductor and thermocouple temperature measurement line pass through from side opening, is connected with radiofrequency generator by adapter (6), prolongation cable (5).

9. orbital radio frequency melting catheter according to claim 8 is characterized in that: the diameter of described track seal wire (1) is 0.3-0.6mm, and the diameter of its head end (7) is 0.08-0.2mm, and length is 1-5cm, and the internal diameter of ring-like (8) is 12-30mm; Catheter body

(2) internal diameter is 0.35-0.8mm.

10. orbital radio frequency melting catheter according to claim 9 is characterized in that: described track seal wire (1) adopts nitinol alloy wire, and catheter body (2) adopts polyamine fat, nylon or PEBAX conduit, and electrode (3) adopts platinum or platinumiridio.

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