CN205198131U - Ablation catheter device - Google Patents

Abstract

But but the melt subassembly of ablation catheter device including radial expansion and radial compression, it is less than 1.78 millimeters to melt the external diameter of subassembly under radial compression state. Ablation catheter device can intervene route line arteria renalis sympathetic nerve radio frequency through femoral artery puncture and melt, also can intervene route line arteria renalis sympathetic nerve radio frequency through radial artery puncture and melt to reduce hematal damage of patient and reduction complication risk, and applicable in not carrying out the patient that the femoral artery puncture intervention was treated, the range of application is wider.

Description

Ablation catheter apparatus

Technical field

This utility model relates to medical instruments field, particularly relates to a kind of ablation catheter apparatus.

Background technology

Hypertension is common chronic disease, in its Forming Mechanism, renin angiotensin aldosterone system (ReninAngiotensinAldosteroneSystem, RAAS) play a key effect as important regulating blood pressure system, it is by maintaining the balance of body water, electrolyte and blood pressure to the adjustment of heart, blood vessel, kidney.Research confirms, RAAS causes hypertension by following three approach: (1) RAAS activates and causes sodium retention; (2) RAAS activates can increase sympathetic nervous system activity; (3) activate can direct vasoconstrictive for RAAS.Wherein, renal artery sympathetic nerve plays decisive role for bringing out with keeping system hypertension, and its overacfivity makes hypertension be maintained.

Melt strategy for renal artery is orthosympathetic through conduit renal artery sympathetic nerve ablation, its typical model of action is by modulating unit through conduit, as electrode, ultrasonic transducer, medicine etc. are transported to the renal artery Ink vessel transfusing of patient body, and by these modulating units to renal artery blood vessel delivered energy, as electric energy, acoustic energy, heat energy etc., to reach the renal sympathetic nerve that melts in renal artery blood vessel wall and to reduce the object of patients' blood.

In prior art, radio frequency ablation catheter is only provided with single modulating unit usually, as catheter main body far-end installs an electrode, handle is utilized to control catheter main body far-end is bent, make this electrode securement blood vessel, and form circuit loop with the indifferent plate electrode of body surface, thus carry out renal sympathetic nerve and melt.This mode is simple, required with the use of guiding catheter (or sheath pipe) size less.But electrode is close to blood vessel instability, along with beating of blood vessel, electrode can produce the phenomenon be separated with blood vessel wall.And blocking renal sympathetic nerve needs to melt in blood vessel many places, and need in use procedure repeatedly to adjust electrode position, add the operating time of patient, also the same target spot of as easy as rolling off a log generation repeats to melt, and the damage causing blood vessel wall serious.

For this reason, the problems referred to above are overcome by arranging multiple modulating unit at present.In ablation procedure, the parts utilizing handle to control to make to be provided with modulating unit expand, this mode ensure that each electrode (modulating unit) can be stablized adherent with renal artery blood vessel wall, decreases the number of times of electrode position adjustment, decreases patient's operating time.But, the expandable structure being provided with electrode makes catheter main body distal dimension obviously increase relative to stagged electrode structure, ablation catheter needs to coordinate the guiding catheter of larger external diameter or delivery sheath to get involved through femoral artery and uses, the damage to patient vessel and increase complication risk can be increased, and be not suitable for bilateral stock hip deformation through femoral artery interventional procedure, obesity femoral artery puncture difficulty not easily hemostasis person, cardiac insufficiency can not put down sleeping person for a long time with there being lumbal vertebra, there is deep vein thrombosis of lower extremity or have pulmonary infarction medical history person, reduce the scope of application of this kind of conduit undoubtedly.

Utility model content

Based on this, be necessary to provide a kind of and can support the use with the delivery instrument of less external diameter and the wider ablation catheter apparatus of range of application.

A kind of ablation catheter apparatus, comprising can radial dilatation and can the ablation member of radial compression, and the external diameter of described ablation member under radial compression is less than 1.78 millimeters.

Wherein in an embodiment, described ablation catheter apparatus also comprises hollow extension and hollow tubing conductor main body, the near-end of described extension is connected with the far-end of described catheter main body, and the far-end of described extension is connected with described ablation member, and the sidewall of described extension is provided with at least one grooving.

Wherein in an embodiment, described ablation member comprises termination, described ablation catheter apparatus also comprises hollow trombone slide, described hollow trombone slide has the inner chamber running through its far-end end face and proximal face, described hollow trombone slide is movably through described catheter main body, and the far-end of described hollow trombone slide is fixed on described termination, described termination has axially extending bore, and the inner chamber of described hollow trombone slide is connected with the axially extending bore of described termination.

Wherein in an embodiment, described ablation member also comprises the support bar of at least two rhizospheres around described hollow trombone slide, and the far-end of each described support bar is connected with described termination, and near-end is connected with described hollow extension.

Wherein in an embodiment, described ablation catheter apparatus also comprises sleeve pipe, and described sleeve pipe axially wears and is fixed in described catheter main body, and described casing pipe sleeve is located on described hollow trombone slide.

Wherein in an embodiment, the near-end of described extension is fixed in described catheter main body, and the near-end of described extension is sheathed on described sleeve pipe.

Wherein in an embodiment, the proximal, side wall of described extension offers multiple aperture, each aperture all with the intracavity inter-connection of described extension, being fixed in described catheter main body proximally by the viscose be contained in described aperture of described extension.

Wherein in an embodiment, described sleeve pipe is fixed on the near-end of described extension by the viscose be contained in described aperture.

Wherein in an embodiment, the proximal, side wall of described extension is provided with the groove of multiple opening towards the sidewall of described catheter main body, being fixed in described catheter main body proximally by the viscose be contained in described groove of described extension.

Wherein in an embodiment, the near-end of described extension is fixed in described catheter main body, and the near-end of described extension inserts in described sleeve pipe.

Wherein in an embodiment, described boot proximal end sidewall offers multiple aperture, each aperture all with the intracavity inter-connection of described sleeve pipe, described boot proximal end is fixed in described catheter main body by the viscose be contained in described aperture.

Wherein in an embodiment, described extension is connected to the far-end of described sleeve pipe by the viscose be contained in described aperture.

Wherein in an embodiment, the far-end sidewall of described sleeve pipe is provided with the groove of multiple opening towards the sidewall of described catheter main body, and the far-end of described sleeve pipe is fixed in described catheter main body by the viscose be contained in described groove.

Wherein in an embodiment, described hollow trombone slide comprises middle tube, and described middle tube is woven by lacing material or is wound.

Wherein in an embodiment, described termination comprises the groove of far-end that axially arrange, accommodating described support bar.

Compared with ablation catheter apparatus of the prior art, ablation catheter apparatus of the present utility model, because the external diameter of ablation member under radial compression is less than 1.78 millimeters, can carry in the guiding catheter of 6F, therefore, ablation catheter apparatus of the present utility model can get involved path row renal artery sympathetic nerve radio-frequency (RF) ablation by femoral artery puncture, also trans-radial puncture path row renal artery sympathetic nerve radio-frequency (RF) ablation can be got involved, thus the damage reduced patient vessel and reduction complication risk, and be applicable to the patient that can not carry out femoral artery puncture interventional therapy, range of application is wider.

Accompanying drawing explanation

The structural representation of the ablation catheter apparatus that Fig. 1 provides for this utility model one embodiment;

Fig. 2 is the schematic diagram under the swelling state of ablation catheter apparatus in Fig. 1;

Fig. 3 is termination in the ablation catheter apparatus in Fig. 1 and support bar group assembly structure schematic diagram;

Fig. 4 is the cross-sectional schematic of the termination of support bar group far-end in Fig. 3;

Fig. 5 is the structural representation of catheter main body in the ablation catheter apparatus in Fig. 1 and extension;

Termination in the ablation catheter apparatus that Fig. 6 provides for another embodiment and support bar group assembly structure schematic diagram;

Fig. 7 is the structural representation melting the hollow trombone slide in pipe guide in Fig. 1;

Fig. 8 and Fig. 9 is the situation schematic diagram that ablation catheter apparatus uses in bending complicated blood vessel.

Detailed description of the invention

For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in detail detailed description of the invention of the present utility model below in conjunction with accompanying drawing.Set forth a lot of detail in the following description so that fully understand this utility model.But this utility model can be much different from alternate manner described here to implement, those skilled in the art can when doing similar improvement without prejudice to when this utility model intension, and therefore this utility model is by the restriction of following public concrete enforcement.

It should be noted that, when element is called as " being fixed on " or " being arranged at " another element, this element can directly be connected on another element, also indirectly can be connected on another element by one or more Connection Element.When an element is known as " being connected to " another element, it can be directly be connected on another element, or is connected on another element by one or more Connection Element.In intervention field, usually one end near for relative operator is called near-end, relative operator one end far away is called far-end.

Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model understand usually.The object of the term used in description of the present utility model herein just in order to describe specific embodiment, is not intended to be restriction this utility model.Term as used herein " and/or " comprise arbitrary and all combinations of one or more relevant Listed Items.

Fig. 1 and Fig. 2 shows the structural representation of the ablation catheter apparatus 100 of this utility model one embodiment.As shown in the figure, ablation catheter apparatus 100 (hereinafter referred to as conduit 100) comprises and melts mechanism 101, catheter main body 102, hollow trombone slide 103 and handle 104.Catheter main body 102, in elongated tubular product, proximally arrives far-end and extends vertically, hollow to form an axial bore in it.

Melt mechanism 101 comprise can the support bar group 110 of radial dilatation and radial compression, extension 111, termination 120 and at least one modulating unit.Wherein, support bar group 110, termination 120 and at least one modulating unit form ablation member.The external diameter of described ablation member under radial compression is less than 1.78 millimeters.Support bar group 110 comprises elastic supporting bar 112 and support bar 113, and support bar 112 is all connected with extension 111 far-end with the near-end of support bar 113; Support bar 112 is all connected with termination 120 with the far-end of support bar 113, and support bar 112 and support bar 113 are around hollow trombone slide 102.The tubing cutting that can be less than 1.78mm by external diameter as, the support bar 112 of support bar group 110 and support bar 113 forms.Modulating unit (for electrode 114 and electrode 115 in illustrated embodiment) is arranged on support bar 112 and support bar 113, and its wall thickness is very thin, substantially do not increase the size of support bar group 110, make the external diameter of ablation member under radial compression be less than 1.78 millimeters.Modulating unit by the wire (not shown) of catheter main body 102 inside, be positioned at company's machine (not shown) on the handle 104 of catheter main body 102 near-end and connection cable (not shown) is connected to power generator (not shown).When power generator sends radio-frequency (RF) energy, be positioned at endovascular electrode 114 and electrode 115 and external electrode (not shown, this external electrode is indifferent plate electrode, usually patient body-surface is placed on, as back or thigh place) will circuit loop be formed, between above-mentioned electrode and external electrode, form high-frequency ac electric field and act on tissue therebetween, produce heat effect and melt above-mentioned tissue.The near-end of described extension 111 is connected with the far-end of catheter main body 102.Be understandable that, support bar group 110 also can comprise three support bars, four support bars or more support bars, is not limited to two of present embodiment, sets as required.

Extension 111 and support bar group 110 can be one-body molded, also can molding and then as a whole by the connection such as other method of attachment that bonds, is spirally connected separately.Time one-body molded with support bar group 110 when extension 111, both form by a metal pipe material (such as: NiTi tubing, Nitinol tubing, stainless steel pipe etc.) cutting.Described extension 111 has certain length, and this length is more than or equal to the length of the part of the deformation that to bend when conduit 100 enters renal artery by ventral aorta, as described in the length range of extension 111 be that 20 ~ 80mm is preferably 30 ~ 50mm.When extension 111 is formed by cuts in metallic pipe, multiple identical or different grooving 116 can be designed on the sidewall of metal tube.Grooving 116 can communicate with the inner chamber of extension 111 and also can not communicate.When grooving 116 communicates with the inner chamber of extension 111, that is hollow out design is carried out to extension 111; When grooving 116 does not communicate with the inner chamber of extension 111, that is grooving 116 is for being arranged on the sidewall of metal tube and not running through the groove of the inner surface of the sidewall of metal tube.The rigidity tool being adjusted extension 111 by the size changing grooving 116 is had the following advantages: on the one hand, the rigidity of conduit 100 far-end can be adjusted, while making conduit 100 far-end have lower bending stiffness, there is higher torsional rigidity, and then make conduit 100 far-end become easy in the endovascular adjustment of renal artery and running fix; On the other hand, doctor can be made to be easy to just conduit 100 to be pushed to renal artery from ventral aorta in operation process, and conduit 100 can not be caused because the rigidity of conduit 100 far-end is excessive to rebound back ventral aorta, cannot push into renal artery.

Hollow trombone slide 103 is in elongated tubular product, and its near-end is connected with handle 104, and its far-end is connected with termination 120.Hollow trombone slide 103 is arranged in a sleeve pipe 105 (see Fig. 5), its together with sleeve pipe 105 axially across the inner chamber of catheter main body 102.The driving mechanism (not shown) that the components such as the driving mechanism that handle 104 has manipulation hollow trombone slide 103, catheter main body 102 moves axially and operating-controlling mechanism move axially.When driving mechanism makes hollow trombone slide 103 move backward, because hollow trombone slide 103 far-end is connected to termination 120, thus make support bar 112 and support bar 113 elastic deformation, and then make support bar group 110 expanded radially, the electrode 114 now on support bar and electrode 115 will recline renal artery blood vessel wall and transmit energy give this electrode place vascular wall tissue.

Fig. 3 and Fig. 4 shows the termination 120 of conduit 100 far-end and the structure of the more details of hollow trombone slide 103.Termination 120 is the cylinder of two chamfers, and it has a through hole 122, groove 124 and groove 126.Through hole 122 axially runs through termination 120, and the internal diameter of through hole 122 is slightly larger than the external diameter of hollow trombone slide 103.Groove 124 and groove 126 are symmetrically distributed in the circumference of through hole 122 periphery of termination 120, and groove 124 and groove 126 opening shape on the cross section of the longitudinal axis perpendicular to catheter main body 102 is identical with the cross sectional shape of support bar 113 far-end on the cross section of the longitudinal axis perpendicular to catheter main body 102 with support bar 112 and be arc.Groove 124 and groove 126 have certain width and the degree of depth, opening size as groove is greater than the distal sections size of support bar, to make support bar 112 and support bar 113 can distinguish insertion groove 124 and groove 126, and be individually fixed in groove 124 and groove 126 by modes such as gluing, welding.

Hollow trombone slide 103 has an inner chamber 128.Inner chamber 128 axially runs through proximal face and the far-end end face of hollow trombone slide 103, the diameter that the internal diameter of inner chamber 128 is greater than conventional intervene operation is the diameter of the seal wire 118 of 0.014 inch, axially can move freely to make the seal wire 118 of 0.014 inch in inner chamber 128.Stretch out termination 120 in the through hole 122 that the far-end of hollow trombone slide 103 is inserted in termination 120, and be fixed on termination 120 by modes such as gluing, welding.Described hollow trombone slide 103 can be braiding webmaster, stainless steel tube, non-telescoping bourdon tube or NiTi pipe etc.The chamfering of described termination 120 far-end can make conduit 100 move in the blood vessel and not scratch blood vessel wall.Described termination 120 can be plastics or metal material is formed.The schematic cross-section of described termination 120 cross section, A-A as shown in Figure 3.Be understandable that, in the through hole 122 that the far-end of hollow trombone slide 103 also can be contained in completely (that is, the far-end of hollow trombone slide 103 does not stretch out termination 120).

Fig. 5 shows the more details that catheter main body 102 is connected with extension 111.As shown in Figure 5, described catheter main body 102 far-end is connected with extension 111, and namely the near-end 1111 of extension 111 stretches in catheter main body 102, and built-in length scope is 0 ~ 10mm, is preferably 3mm ~ 5mm.By gluing, extension 111 and catheter main body 102 are fixed.Particularly, near-end 1111 sidewall of extension 111 can offer the aperture 1112 of the intracavity inter-connection of some and extension 111, increases the amount of inserting that multiple aperture 1112 is conducive to increasing glue, makes extension 111 be connected more firm with catheter main body 102.The outside of described hollow trombone slide 103 is socketed on a sleeve pipe 105.Sleeve pipe 105 is axially across the inner chamber of catheter main body 102, and its near-end is connected with handle 104, and far-end 1051 extend in the near-end 1111 of extension 111.Far-end 1051 end face of described sleeve pipe 105 is concordant with the far-end end face of catheter main body 102, or the far-end end face exceeding catheter main body 102 (that is, the end face of the far-end 1051 of described sleeve pipe 105 compared with the far-end end face of catheter main body 102 near termination 120), or far-end 1051 end face of described sleeve pipe 105 to imbed in catheter main body 102 (that is far-end 1051 end face of sleeve pipe 105 compared with the far-end end face of catheter main body 102 near handle 104).The benefit brought position that stretches into of said distal ends 1051 is: after far-end 1111 surface of extension 111 increases aperture, glue is filled in hole, when position because of the far-end 1051 of sleeve pipe 105 is concordant with the far-end of catheter main body 102, glue is only attached to the surface of sleeve pipe 105 through aperture 1112, and hollow trombone slide 103 can not be touched, this makes hollow trombone slide 103 can move axially in catheter main body 102, and can not produce the risk of being clung by glue.The existence of described sleeve pipe 105 also has another advantage, the inner chamber of catheter main body 102 not only has hollow trombone slide 103, also have wire and sensor signal lines (be in way and illustrate), when conduit 100 is in twisting states and stretching hollow trombone slide 103, hollow trombone slide 103 may exist and is intertwined with wire and sensor signal lines, and then produce friction each other, or more difficult stretching hollow trombone slide 103, or make wire and sensor signal thread breakage equivalent risk.When after increase sleeve pipe 105, hollow trombone slide 103 is easy to be stretched, and can not be wound around with wire and sensor signal lines.

Be understandable that, aperture 1112 may also be the outer surface of the near-end 1111 being present in extension 111 in the form of a groove, and now groove is opened on the sidewall of extension 111 near-end, and opening is towards the sidewall of catheter main body 102.Such mode not only increases the amount of inserting of glue, makes extension 111 more firm with the connection of catheter main body 102, also makes glue can not stick hollow trombone slide 103 by the near-end 1111 of extension 111.When aperture 1112 may also be the outer surface of the near-end 1111 being present in extension 111 in the form of a groove, sleeve pipe 105 far-end also can be connected with the near-end of extension 111 by the mode of bonding.

It will also be appreciated that, boot proximal end also can between catheter main body and extension, that is, the near-end of extension inserts the far-end of sleeve pipe, the far-end of sleeve pipe is fixed on the far-end of catheter main body, in such cases, boot proximal end sidewall also can be offered multiple aperture to accommodate the viscose of bonding catheter main body and sleeve pipe, boot proximal end sidewall also can be arranged the groove of multiple opening towards catheter main body sidewall to accommodate the viscose of bonding catheter main body and sleeve pipe.

It will also be appreciated that, described boot proximal end can also be fixed in described catheter main body by the mode that melt of heat, now, also just because of the existence of aperture or groove, increase heat and melt contact area in process between adjacent two pipes, make the connection between adjacent two pipes more firm.

Fig. 6 shows the termination 130 of conduit 100 far-end and another embodiment of hollow trombone slide 103.The far-end 131 of hollow trombone slide 103 stretches out termination 130; far-end 131 with hollow trombone slide 103 is formed a step by termination 130; for avoiding conduit 100 scratch blood vessel wall when Ink vessel transfusing is carried; at above-mentioned step place; some glue can be coated with to make above-mentioned step round and smooth; or increase the cylindrical protective part 132 that a far-end has chamfering; its internal diameter is slightly larger than the external diameter of hollow trombone slide 103; described guard member 132 is connected with termination 130 and hollow trombone slide 103 by modes such as gluing or welding, and described guard member 132 can be the formation such as plastics or metal material.

Fig. 7 shows an embodiment of hollow trombone slide 103.Hollow trombone slide 103 is braiding webmaster, and as shown in the figure, it comprises the coaxial outer tube 201, middle tube 202 and inner tube 203 3 part that arrange from outside to inside successively.The materials such as the optional polyimides of described outer tube 201, PEBAX, nylon, polyurethane rubber are made; The materials such as the optional rustless steel of described middle tube 202, copper, alloy or nylon, it is by weave or the mode such as winding is formed, and the materials such as the optional polyimides of described inner tube 203, PTFE composite or pure PTFE are made.The hollow trombone slide 103 be made up of braiding webmaster that this utility model discloses, when inner tube 203 selects PTFE material, because the coefficient of friction of PTFE is very little, when seal wire moves axially in hollow trombone slide 103, the frictional resistance of inner tube 203 wall of itself and hollow trombone slide 103 is very little, therefore, when conduit 100 is in case of bending in the blood vessel, seal wire can be movable in hollow trombone slide 103 smoothly, when seal wire arrives after in renal artery, now along seal wire, conduit 100 can be pushed to renal artery target spot smoothly.Select PTFE as the material of inner tube 203, except the feature that its coefficient of friction is very little, it also can make integral hollow trombone slide 103 have more soft feature, thus the hardness melting mechanism 101 entirety making to be assembled with hollow trombone slide 103 become more soft.In operation process, when conduit 100 is pushed out the outlet of guiding catheter, because of above-mentioned said soft feature, the melting mechanism 101 and along blood vessel wall pushed forward, and blood vessel top will can not be obtained very high and cause blood vessel to damage of the far-end of conduit 100.In addition, one end of hollow trombone slide 103 and the termination 120 of conduit 100 are fixed by the mode such as soldering, viscose glue, when the controlling organization proximally stretching hollow trombone slide 103 of operating grip 104, hollow trombone slide 103 because of middle tube 202 for metal material braiding or be wound around mode be fixed between outer tube 201 and inner tube 203, it has sufficient intensity makes the support bar 112 of support bar group 110 and support bar 113 that elastic deformation occur, and make support bar group 110 expanded radially, and now the ductility of hollow trombone slide 103 itself is zero or is approximately zero.

Fig. 8 and Fig. 9 discloses has overall exchange (OTW; Over-the-wire) far-end of the conduit 100 of mode of movement is in the endovascular service condition of bending complexity.As shown in Figure 7, the blood vessel that a section bending is had between target position A and renal artery entry position.For femoral artery puncture intervention, first doctor opens a minimal incision * at the thigh femoral artery place of patient, seal wire 118 is sent in femoral artery through puncture needle, under angiography is auxiliary, seal wire is pushed in ventral aorta 10, and guiding catheter 16 is pushed in ventral aorta 10 along seal wire 118; Then, by the soft feature of seal wire 118 head end and under the washing away of blood flow, seal wire 118 is sent in renal artery 12; Then, guiding catheter 16 is pushed to the porch of renal artery 12 along seal wire 118, continues to push seal wire 118 and arrive target position A, and continue seal wire 118 pushed forward one segment distance, as shown in Figure 7; Then, conduit 100 is pushed in renal artery 12 along seal wire 118 through guiding catheter 16, as shown in Figure 8, once after support bar group 110 arrives target position A, doctor operates hollow trombone slide 103 by handle 104 and proximally moves, because the far-end of hollow trombone slide 103 and the termination of support bar group 110 are fixed together, support bar group 110 will expand, electrode paste on support bar leans on the blood vessel wall of target position A and transmits energy to this vascular wall tissue, thus completes the neural radio-frequency (RF) ablation of the kidney of the renal artery vessel outer wall of bending complexity.

Compared with prior art, the ablation catheter apparatus of the present embodiment has following clear superiority:

(1) 1.78 millimeters are less than by the external diameter of ablation member under radial compression, can carry in the guiding catheter of 6F, therefore, ablation catheter apparatus of the present utility model can get involved path row renal artery sympathetic nerve radio-frequency (RF) ablation by femoral artery puncture, also trans-radial puncture path row renal artery sympathetic nerve radio-frequency (RF) ablation can be got involved, thus the damage reduced patient vessel and reduction complication risk, and be applicable to the patient that can not carry out femoral artery puncture interventional therapy, range of application is wider.

(2) ablation catheter apparatus of the present embodiment has a hollow trombone slide, it can control radial dilatation and the radial compression of ablation member under the manipulation of handle, frame for movement without the need to other complexity controls ablation member, thus can not have an impact to the structure size of ablation member, guaranteeing that ablation member is applicable to the sheath pipe of 6F and smaller szie, helping for having bending complicated renal artery vascular patients band; The inner chamber of hollow trombone slide can hold the standard guide wire that angioplasty uses to be passed through, as 0.014 " seal wire, namely realize the mode of movement of OTW (over-the-wire); Moreover, radial dilatation and the radial compression of ablation member can be controlled by means of only push-and-pull hollow trombone slide, make surgical operation process become simple.

(3) sleeve pipe outside hollow trombone slide have a following advantage: the inner chamber of catheter main body not only has hollow trombone slide, also have wire and sensor signal lines, when catheter main body is in twisting states and stretching hollow trombone slide, hollow trombone slide may exist and is intertwined with wire and sensor signal lines, and then produce friction each other, or more difficult stretching hollow trombone slide, or make wire and sensor signal thread breakage equivalent risk.When after increase sleeve pipe, hollow trombone slide is easy to be stretched, and can not be wound around with wire and sensor signal lines.

(4) extension offers grooving, the rigidity tool being adjusted extension by the size changing grooving is had the following advantages: on the one hand, the rigidity of ablation catheter apparatus far-end can be adjusted, while making ablation catheter apparatus far-end have lower bending stiffness, there is higher torsional rigidity, and then make distal end of catheter become easy in the endovascular adjustment of renal artery and running fix; On the other hand, doctor can be made to be easy to just ablation catheter apparatus to be pushed to renal artery from ventral aorta in operation process, and ablation catheter apparatus can not be caused to rebound back ventral aorta because the rigidity of ablation catheter apparatus far-end is excessive, cannot push into renal artery.

The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to this utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be as the criterion with claims.

Claims (15)

1. an ablation catheter apparatus, comprising:

Can radial dilatation and can the ablation member of radial compression, the external diameter of described ablation member under radial compression is less than 1.78 millimeters.

2. ablation catheter apparatus according to claim 1, it is characterized in that, described ablation catheter apparatus also comprises hollow extension and hollow tubing conductor main body, the near-end of described extension is connected with the far-end of described catheter main body, the far-end of described extension is connected with described ablation member, and the sidewall of described extension is provided with at least one grooving.

3. ablation catheter apparatus according to claim 2, it is characterized in that, described ablation member comprises termination, described ablation catheter apparatus also comprises hollow trombone slide, described hollow trombone slide has the inner chamber running through its far-end end face and proximal face, and described hollow trombone slide is movably through described catheter main body, and the far-end of described hollow trombone slide is fixed on described termination, described termination has axially extending bore, and the inner chamber of described hollow trombone slide is connected with the axially extending bore of described termination.

4. ablation catheter apparatus according to claim 3, is characterized in that, described ablation member also comprises the support bar of at least two rhizospheres around described hollow trombone slide, and the far-end of each described support bar is connected with described termination, and near-end is connected with described hollow extension.

5. ablation catheter apparatus according to claim 3, is characterized in that, described ablation catheter apparatus also comprises sleeve pipe, and described sleeve pipe axially wears and is fixed in described catheter main body, and described casing pipe sleeve is located on described hollow trombone slide.

6. ablation catheter apparatus according to claim 5, is characterized in that, the near-end of described extension is fixed in described catheter main body, and the near-end of described extension is sheathed on described sleeve pipe.

7. ablation catheter apparatus according to claim 6, it is characterized in that, the proximal, side wall of described extension offers multiple aperture, each aperture all with the intracavity inter-connection of described extension, being fixed in described catheter main body proximally by the viscose be contained in described aperture of described extension.

8. ablation catheter apparatus according to claim 7, is characterized in that, described sleeve pipe is fixed on the near-end of described extension by the viscose be contained in described aperture.

9. ablation catheter apparatus according to claim 6, it is characterized in that, the proximal, side wall of described extension is provided with the groove of multiple opening towards the sidewall of described catheter main body, being fixed in described catheter main body proximally by the viscose be contained in described groove of described extension.

10. ablation catheter apparatus according to claim 5, is characterized in that, the near-end of described extension is fixed in described catheter main body, and the near-end of described extension inserts in described sleeve pipe.

11. ablation catheter apparatus according to claim 10, it is characterized in that, described boot proximal end sidewall offers multiple aperture, each aperture all with the intracavity inter-connection of described sleeve pipe, described boot proximal end is fixed in described catheter main body by the viscose be contained in described aperture.

12. ablation catheter apparatus according to claim 11, is characterized in that, described extension is connected to the far-end of described sleeve pipe by the viscose be contained in described aperture.

13. ablation catheter apparatus according to claim 10, it is characterized in that, the far-end sidewall of described sleeve pipe is provided with the groove of multiple opening towards the sidewall of described catheter main body, and the far-end of described sleeve pipe is fixed in described catheter main body by the viscose be contained in described groove.

14. ablation catheter apparatus according to claim 3, is characterized in that, described hollow trombone slide comprises middle tube, and described middle tube is woven by lacing material or is wound.

15. ablation catheter apparatus according to claim 4, is characterized in that, described termination comprises the groove of far-end that axially arrange, accommodating described support bar.