CN204274635U - Renal artery ablation catheter - Google Patents
Renal artery ablation catheter Download PDFInfo
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- CN204274635U CN204274635U CN201420547387.8U CN201420547387U CN204274635U CN 204274635 U CN204274635 U CN 204274635U CN 201420547387 U CN201420547387 U CN 201420547387U CN 204274635 U CN204274635 U CN 204274635U
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Abstract
The utility model discloses a kind of renal artery ablation catheter, it is characterized in that comprising catheter main body and melting part; Ablating electrode, is fixedly connected on the far-end melting part, comprises the optional cavity in electrode shell, electrode shell and temperature sensor; Described electrode shell is provided with the fluid path flowed out for perfusion fluid, and described electrode shell near-end is provided with the fluid path flowed into for perfusion fluid; Be provided with conduction of heat isolation structure between described temperature sensor and fluid path, the electrode shell thickness of described temperature sensor present position is for being less than 0.2mm, and the surface area of described electrode shell is for being greater than 15 square millimeters.Renal artery ablation catheter of the present utility model can meet the effectiveness and safety that melt simultaneously.
Description
Technical field
This utility model relates to a kind of renal artery conduit, concretely, relates to a kind of renal artery ablation catheter of cold brine perfusion.
Background technology
Renal artery sympathetic activation is a key factor of hypertension emergence and development, and a large amount of zooperies has confirmed the impact of sympathetic nervous system on blood pressure.In the measure that application mode of making the life better is treated with at least 3 kinds of reasonably combined enough antihypertensives comprising diuretic, still systolic pressure and diastolic pressure can not be controlled, when target level, to be called refractory hypertension (or intractable hypertension).Clinical proof is well do not control blood pressure by medicine to these by the patient that intractable hypertension torments.
Percutaneous renal artery sympathetic nerve ablation (catheter-based mpatheticdenervation, RDN) be a Novel interventional therapy technology of rising in recent years, it is by localized thermal damage, and optionally part blocks renal artery is sympathetic imports into and efferent nerve fiber.In the clinical experiment of multiple refractory disease, comprise intractable hypertension, chronic heart failure, chronic renal insufficiency, cardiopulmonary syndrome etc., all obtained gratifying effect, and demonstrated good application prospect.
Although percutaneous renal artery sympathetic nerve ablation achieves satisfied curative effect in reduction patients' blood, but long term follow-up lacks discovery: mortality rate and the post-operative morbidity of simple sympathectomy are all higher, and with serious long-term complications, even produce serious postural hypotension.
Therefore, a kind of novel renal artery ablation catheter is needed.
Summary of the invention
This utility model provides a kind of renal artery ablation catheter, it is characterized in that comprising catheter main body, its
There is near-end, far-end and the central lumen run through wherein;
Melt part, comprise one section of elasticity head end pipe, there is near-end, far-end and at least one is through
Chamber, its near-end is fixedly connected with the far-end of catheter main body;
Ablating electrode, is fixedly connected on the far-end melting part, comprises in electrode shell, electrode shell
Optional cavity and temperature sensor; Described electrode shell is provided with the fluid path flowed out for perfusion fluid, and described electrode shell near-end is provided with the fluid path flowed into for perfusion fluid; Be provided with conduction of heat isolation structure between described temperature sensor and fluid path, the electrode shell thickness of described temperature sensor present position is for being less than 0.2mm, and the surface area of described electrode shell is for being greater than 15 square millimeters;
Perfusion channel, has near-end and far-end, and its far-end is extended into by the central lumen of catheter main body
Enter to melt in the chamber of part, be communicated with the fluid path supplying perfusion fluid to flow into of ablating electrode.
Term used herein " optionally " (optional) represents the implication of " not essential " or " nonessential ".Such as, " optional cavity " refers to have this cavity, also can not this cavity.This according to circumstances can be selected by those skilled in the art.
In a kind of embodiment of the present utility model, described electrode shell is provided with a through hole, described in
Temperature sensor is located in described through hole.
In a detailed description of the invention of the present utility model, the near-end of described electrode shell is provided with plug-in unit, and the remote extension of described plug-in unit, to described cavity, comprises at least one through hole; On described plug-in unit, the remote extension of through hole is in the through hole of described electrode shell, its proximal openings is in the near-end of described plug-in unit, distal openings is on the outer surface of described electrode shell, and with the flush with outer surface of electrode shell, the far-end of through hole on described plug-in unit is located in described temperature sensor.
In a detailed description of the invention of the present utility model, the near-end of described electrode shell is provided with plug-in unit,
The remote extension of described plug-in unit, to described cavity, comprises at least one through hole; On described plug-in unit, the remote extension of through hole is on the inner surface of described electrode shell, concordant with the inner surface of electrode shell, or part extends in described electrode shell; On described plug-in unit, the proximal openings of through hole is in the near-end of described plug-in unit, and far-end is opening or enclosed construction, and the far-end of through hole on described plug-in unit is located in described temperature sensor; Preferably, the electrode shell thickness of described temperature sensor present position is for being less than 0.1mm.
Be provided with priming line in described perfusion channel, the far-end of described priming line can be by described
The central lumen of joystick, catheter main body extends the far-end arriving the chamber melting part, is connected with the fluid path supplying perfusion fluid to flow into of ablating electrode; Also can be the far-end being extended the central lumen arriving catheter main body by described joystick, be connected with at least one the through chamber melting part.
In a detailed description of the invention of the present utility model, described electrode shell is provided with some apertures on the surface, and described aperture orifice area summation is less than the area of smallest cross-sectional in the fluid path flowed into for perfusion fluid.
In a detailed description of the invention of the present utility model, be provided with an annular electrode at described distal end of catheter, the distance between itself and ablating electrode is 0.5-5mm, preferred 1-2mm.
Preferably, described conduction of heat isolation structure is nonmetal thermal insulation layer.
Described nonmetal thermal insulation layer can be located at inwall and/or the outer wall of through hole on described plug-in unit; Preferably, on described plug-in unit through hole inwall and/or outer wall upper part or be all provided with nonmetal thermal insulation layer.
Described nonmetal thermal insulation layer is made up of macromolecular material or pottery, or is gas thermal insulation layer.
Of the present utility model one preferred embodiment in, the surface area of the electrode shell of described ablating electrode is greater than 15 square millimeters, can meet the effectiveness and safety that melt so simultaneously.Ring electrode and ablating electrode partner electrode, are used as to carry out high-frequency electrical stimulation to renal artery, cause the blood pressure of patient, and the intensity of variation according to patients' blood and heart rate judges the effectiveness melting target spot.
Accompanying drawing explanation
Fig. 1 is the structural representation according to renal artery ablation catheter of the present invention;
Shown in Fig. 2 is the sectional view of catheter main body 12 according to the preferred embodiment of the present invention, represents catheter main body 12 and the annexation melting part 13;
Shown in Fig. 3 is sectional view along Fig. 1 A-A line;
Shown in Fig. 4 is sectional view along B-B line in Fig. 3;
Shown in Fig. 5 is sectional view along C-C line in Fig. 3;
Shown in Fig. 6 is the schematic diagram of temperature sensor 33 in ablating electrode 17 according to the preferred embodiment of the present invention;
Shown in Fig. 7 is the sectional view of ablating electrode 17 according to another preferred implementation of the present invention;
Shown in Fig. 8 is the structure chart of ablating electrode 17 according to another preferred implementation of the present invention;
Shown in Fig. 9 is the sectional view of ablating electrode 17 according to Fig. 8;
Shown in Figure 10 is analysing and observe according to the ablating electrode 17 of another preferred implementation of the present invention
Figure;
Shown in Figure 11 is sectional view according to the ablating electrode 17 in Figure 10.
Shown in Figure 12 is analysing and observe according to the ablating electrode 17 of another preferred implementation of the present invention
Figure;
Shown in Figure 13 is analysing and observe according to the ablating electrode 17 of another preferred implementation of the present invention
Figure;
Shown in Figure 14 is analysing and observe according to the ablating electrode 17 of another preferred implementation of the present invention
Figure.
Detailed description of the invention
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail, but this utility model is not limited only to embodiment below.
Shown in Fig. 1 is the structural representation of a kind of renal artery ablation catheter 10 of the present utility model, comprise catheter main body 12, it has far-end and near-end, is provided with and melts part 13, be provided with joystick 11 at the near-end of described catheter main body 12 at the far-end of described catheter main body 12.
Shown in Fig. 2 is the sectional view of catheter main body 12 according to a kind of embodiment of the present utility model, represents catheter main body 12 and the annexation melting part 13; Described catheter main body 12 comprises reinforced pipe 22 and is placed on the main body tube 28 of its outside, described main body tube 28 can be made up of the macromolecular material of biocompatibility, such as be made up of polyether block amide, polyurethane or nylon material, at least one deck wire braid (not shown) is preferably comprised in its tube wall, can be stainless steel silk braid, described wire braid can be one deck, two-layer or more; Described reinforced pipe 22 comprises central lumen 23, and described reinforced pipe 22 can be made up of any suitable macromolecular material, such as, by polyether block amide, polyurethane, polyimides or nylon material extrusion molding; Described catheter main body is preferably elongated, flexible, but usually incompressible in their length direction, and described central lumen 23 extends in the axis of catheter main body 12; Wire 25, draught line 21 and priming line 26 extend in described central lumen 23.
The described part 13 that melts comprises elasticity head end pipe 31, and it can be made up of biocompatible materials, comprises far-end, near-end and at least one chamber, and described chamber can be central lumen or eccentric chamber.As shown in Figure 2, in a detailed description of the invention of the present utility model, described elasticity head end pipe 31 comprises the first eccentric chamber 35, second eccentric chamber 36 and three eccentricity chamber 37, preferably, at least one deck wire braid (not shown) is comprised in the tube wall of described elasticity head end pipe 31, can be stainless steel silk braid, described wire braid can be one deck, two-layer or more.
According to this utility model one preferred embodiment, be provided with one section of connection tube (not shown) at described elasticity head end pipe 31 with described main body tube 28 junction, it can be made up of any suitable material, is preferably made up of polytetrafluoroethylmaterial material; Described connection tube is used for the connection between described main body tube 28 and described elasticity head end pipe 31, and its hardness is between described main body tube 28 and described elasticity head end pipe 31.
Preferably, the near-end of described elasticity head end pipe 31 is levigate end 34, as shown in Figure 2, the diameter compatible of its external diameter and catheter main body 12 closes, described levigate end 34 is inserted in catheter main body 12, its can by bonding, welding or other suitable mode be fixed, such as by ultraviolet curing glue, itself and catheter main body 12 are adhesively fixed.
Shown in Fig. 3 is sectional view along A-A line in Fig. 1, and shown in Fig. 4 is sectional view along B-B line in Fig. 3, and shown in Fig. 5 is sectional view along C-C line in Fig. 3, and shown in Fig. 6 is the schematic diagram of temperature sensor 33 shown in Fig. 4 and Fig. 5.Be provided with ablating electrode 17 at the far-end of described elasticity head end pipe 31, the length direction along elasticity head end pipe 31 is provided with ring electrode 16, and its quantity can be different according to actual needs, also can not have ring electrode.Preferably, the length direction along elasticity head end pipe 31 is provided with a ring electrode 16, the distance between described ring electrode 16 and ablating electrode 17 is 0.5-5mm, preferred 1-2mm.Ring electrode 16 and ablating electrode 17 partner electrode, and be used as to carry out high-frequency electrical stimulation to renal artery, cause the blood pressure of patient, the intensity of variation according to patients' blood and heart rate judges the effectiveness melting target spot.Described ablating electrode 17 comprises the cavity 76 of electrode shell 71 and its inside.Described electrode shell 71 is also provided with through hole 79, and the diameter of described through hole 79 is less than 1mm; Preferably, the diameter of described through hole 79 is less than 0.5mm.The outer surface of described electrode shell 71 is the parts that can contact with ablation tissue; The cavity of described electrode shell 71 inside be can not with the part of contact tissue.
In a preferred embodiment, as shown in Figure 4 and Figure 5, be provided with plug-in unit 74 in described cavity 76, the near-end of described electrode shell 71 is located at by described plug-in unit 74, in its remote extension to described cavity 76.Described plug-in unit 74 can be cylindrical, disc or other suitable shape, and it at least comprises through hole 81, and the remote extension of described through hole 81 is in the through hole 79 of described electrode shell 71.The extension of described through hole 81 and described plug-in unit 74 can be that one is formed, also can be that split is formed, as described in insertion hollow pipe in through hole 81, or be connected with pipeline or other suitable structure at the far-end of described through hole 81.The proximal openings of described through hole 81 in the near-end of described plug-in unit 74, the distal openings of described through hole 81 on the outer surface of described electrode shell 71, with the flush with outer surface of described electrode shell 71.The far-end of described through hole 81 is provided with temperature sensor 33, and described temperature sensor 33 is by being adhesively fixed.Described temperature sensor 33 present position is the through hole on electrode shell, and electrode shell thickness is zero herein.The position of described through hole 81 can be the axial location near described electrode shell 71, also can be the sidewall near described electrode shell 71.Described plug-in unit also comprises through hole 80, and described through hole 80 is the fluid paths flowed into for perfusion fluid.
The top of described temperature sensor 33 can with the flush with outer surface of described electrode shell, also can be the proximity being positioned at described electrode shell, as described in the top fraction of temperature sensor 33 project to outside outer surface, or fraction is reduced in outer surface.
Described plug-in unit 74 also comprises blind hole 82, and its internal fixtion has draught line 21.Described through hole 80, through hole 81 and blind hole 82 are connected with three eccentricity chamber 37 with the eccentric chamber 36 of the first eccentric chamber 35, second of elasticity head end pipe 31 respectively.Preferably, can in three holes 80,81 of described plug-in unit 74, weld respectively on 82 or be bonded with hollow pipe, it can be made up of suitable macromolecular material or metal material, as polyimides or rustless steel.
Be provided with conduction of heat isolation structure between described temperature sensor 33 and described fluid path, described conduction of heat isolation structure is nonmetal thermal insulation layer 78, and it is located on described through hole 81.When the extension of described through hole 81 and described plug-in unit 74 are integrally formed, when described plug-in unit 74 is metal material, described nonmetal thermal insulation layer 78 is located at inwall and/or the outer wall of described through hole 81.The inwall of described through hole 81 and/or outer wall can refer to inwall and/or the outer wall of the one section of through hole 81 extended in described cavity herein, also can refer to inwall and/or the outer wall of whole through hole 81.Described nonmetal thermal insulation layer 78 can be insulating tubular layer, inserts inwall and/or the outer wall of described through hole 81, also can be coated non-metallic thermal insulation layer on the inwall and/or outer wall of described through hole 81.When described plug-in unit 74 is nonmetallic materials, namely described through hole 81 itself can be used as nonmetal thermal insulation layer.When the extension of described through hole 81 and described plug-in unit 74 split are formed, when the extension of described through hole 81 is metal material, described nonmetal thermal insulation layer 78 is located at inwall and/or the outer wall of described through hole 81.When the extension of described plug-in unit through hole 81 is nonmetallic materials, namely described through hole 81 itself can be used as nonmetal thermal insulation layer.
Described nonmetal thermal insulation layer 78 can be the inwall and/or the outer wall that all cover described through hole 81, also can be that part covers.When described nonmetal thermal insulation layer 78 part covers, can adjust hot degree of isolation, with the temperature regulating temperature sensor 33 to measure.When changing material or its thickness of nonmetal thermal insulation layer, also can adjust hot degree of isolation.Described nonmetal thermal insulation layer 78 is made up of the nonmetallic materials with heat insulating function, can be that macromolecular material is made, and also can be that pottery is made or is made up of other suitable nonmetallic materials.Described nonmetal thermal insulation layer 78 also can be gas thermal insulation layer, in time adopting gas thermal insulation layer, described nonmetal thermal insulation layer 78 can be the thermal insulation layer that expanded material is formed, and also can be one or more thermal insulation layer of being made up of airtight air chamber or other suitable structure.Described nonmetal thermal insulation layer 78 can adopt resistant to elevated temperatures nonmetallic materials to make.Owing to being provided with nonmetal thermal insulation layer 78 on described through hole 81, temperature sensor is separated mutually with perfusion fluid cooling effect, perfusion fluid is weakened to the cooling effect at position residing for temperature sensor, and temperature sensor can detect that the temperature that more radio-frequency current heating effects produce raises.
Described plug-in unit 74 can all be placed in the cavity of described electrode shell 71, also can partly be placed in the cavity of described electrode shell 71, as shown in Figure 7.
Described temperature sensor 33 can be thermocouple, critesistor or other; The quantity of described temperature sensor can be one, two, three or more, as shown in Figure 4, the far-end of described temperature sensor 33 extends in the second eccentric chamber 36 of elasticity head end pipe 31 by the central lumen 23 of catheter main body 12, then extend in described through hole 81, by being adhesively fixed on the far-end of described through hole 81.Described temperature sensor 33 extend into described joystick 11 proximally by central lumen 23, and extend out from described joystick 11, be connected with device for detecting temperature (not shown).
Perfusion channel, has near-end and far-end, and its far-end is extended in the first eccentric chamber 35 of elasticity head end pipe 31 by the central lumen 23 of joystick 11, catheter main body 12, is communicated with the fluid path of ablating electrode 17.Priming line 26 is provided with in described perfusion channel, the far-end of described priming line 26 can be the far-end being extended the first eccentric chamber 35 arriving elastic head end pipe 31 by the central lumen 23 of described joystick 11, catheter main body 12, is connected with the fluid path of ablating electrode 17; Also can be the far-end being extended the central lumen 23 arriving catheter main body 12 by described joystick 11, be connected with the first eccentric chamber 35 of elasticity head end pipe 31.
Described priming line 26 can be made up of any suitable material, and its far-end is extended in the first eccentric chamber 35 of elasticity head end pipe 31 by the central lumen 23 of catheter main body 12, connects with the through hole 80 on described plug-in unit 74.The central lumen 23 proximally by catheter main body 12 of priming line 26 extends in described joystick 11, its fixing means can adopt any applicable method well known to those skilled in the art to be fixed, such as connect one section of arm 14 at the near-end of described priming line 26, as shown in Figure 1, it is outside that it extends to described joystick 11, and end and female Luer 15 are connected and fixed.
Perfusion fluid, can be any suitable liquid, such as normal saline, it enters in described priming line 26 by described arm 14, and entered in the cavity 76 of described ablating electrode 17 by described priming line 26 and through hole 80, the outside of described conduit 10 is flow to by the hole on described electrode shell.
Described electrode shell 71 is provided with some aperture (not shown)s, as the fluid path flowed out for perfusion fluid.Described aperture can be arranged by any suitable mode, can be to adopt the modes such as machinery, laser or electric machining to arrange, and porous material also can be adopted to make.Described aperture is uniformly distributed in the surface of electrode shell 71, and described aperture orifice area summation is less than the area of priming line smallest cross-sectional.This embodiment can ensure cool brine uniform fold ablating electrode, and the tissue that ablating electrode is reclined can be poured washing away of uniform liquid, reduces the contact impedance of electrode institute contact tissue, to make electric current enter organization internal, effectively melts.The surface area of described electrode shell 71 is greater than 15 square millimeters, and can meet the effectiveness and safety that melt like this, effectiveness mainly ensures the degree of depth melted simultaneously, blocks the outer field sympathetic nerve of renal artery, makes the output of energy enough large; Safety refers to and reduces electric current density as far as possible, ensures with the tissue temperature of ablating electrode surface contact not high, can not cause damage to histiocyte; Thus the surface area increasing ablating electrode can realize while general power increases, making unit area output keep low-level.
Draught line 21, preferably be made up of rustless steel or Nitinol, as shown in Fig. 2 and Fig. 3 and Fig. 5, its far-end extends in the three eccentricity chamber 37 of elasticity head end pipe 31 by central lumen 23, the one section of draught line 21 extended in catheter main body 12, preferably, its outer cover has bourdon tube 29, described bourdon tube 29 is preferably the tight structure of band tightening force, its outer cover has the second protective casing (not shown), described second protective casing can be made up of any suitable material, is preferably made up of polyamide material, within it extends for described bourdon tube 29; The far-end of described second protective casing and near-end can be fixed on described bourdon tube 29 by bonding, welding or other suitable mode, such as, bond on described bourdon tube 29 by ultraviolet curing glue; As shown in Figure 5; the one section of draught line 21 extended in described elasticity head end pipe 31; preferably; its outer cover has the first protective casing 32; described first protective casing 32 can be made up of any suitable material; preferably be made up of polytetrafluoroethylmaterial material, it is located in described elasticity head end pipe 31, within it extends for described draught line 21.
As shown in Figure 5, the remote extension of described draught line 21 enters in the hole 82 on described plug-in unit 74, and its end is fixed by welding, bonding or other suitable mode, is fixed preferably by welding.
The near-end of described draught line 21 is fixed on described joystick 11, and its fixing means can adopt any applicable method well known to those skilled in the art to be fixed.The fixing means of the draught line such as, disclosed in published US Patent No. 6120476.By the control to draught line 21, melt part described in can making and deflect.
Wire 25, as shown in Fig. 2 and Fig. 3 and Fig. 4, its far-end extends in the second eccentric chamber 36 of elasticity head end pipe 31 by central lumen 23, be connected with ablating electrode 17, ring electrode 16 and temperature sensor 33 respectively, its connected mode is welding or other suitable mode, preferably by being welded and fixed.Preferably, thread-protected tube 27 is provided with in the outside of described wire 25.
The near-end of wire 25 is fixed on described joystick 11, and its fixing means can adopt any applicable method well known to those skilled in the art to be fixed, such as, be fixed by welding on corresponding plug.
Fig. 8 is the sectional view of the described ablating electrode 17 according to another embodiment of the present utility model.As shown in Figure 8, described ablating electrode 17 comprises the cavity 76 of electrode shell 71 and inside thereof, and the near-end of described electrode shell 71 is located at by plug-in unit 74.Described plug-in unit 74 can be cylindrical, disc or other suitable shape, and it at least comprises through hole 81, and the remote extension of described through hole 81 is in the through hole 79 of described electrode shell 71.The extension of described through hole 81 and described plug-in unit 74 can be that one is formed, also can be that split is formed, as described in insertion hollow pipe in through hole 81, or be connected with pipeline or other suitable structure at the far-end of described through hole 81.The proximal openings of described through hole 81 is in the near-end of described plug-in unit 74, in the far-end of described through hole 81 is transferred and is extended on the sidewall of described electrode shell 71 through hole 79 in described cavity 76, and be opened on sidewall, with the flush with outer surface of described electrode shell 71, as shown in Figure 8.The far-end of described through hole 81 is provided with temperature sensor 33, and described temperature sensor 33 is by being adhesively fixed.Described plug-in unit 74 also comprises through hole 80, and described through hole 80 is fluid path, flows into for perfusion fluid.Described through hole 80 and through hole 81 are connected with the second eccentric chamber 36 with the first eccentric chamber 35 of elasticity head end pipe 31 respectively.
Described through hole 81 is provided with nonmetal thermal insulation layer 78, and when the extension of described through hole 81 and described plug-in unit 74 are integrally formed, when described plug-in unit 74 is metal material, described nonmetal thermal insulation layer 78 is located at inwall and/or the outer wall of described through hole 81.When described plug-in unit 74 is nonmetallic materials, namely described through hole 81 itself can be used as nonmetal thermal insulation layer.When the extension of described through hole 81 and described plug-in unit 74 split are formed, when the extension of described through hole 81 is metal material, described nonmetal thermal insulation layer 78 is located at inwall and/or the outer wall of described through hole 81.When the extension of described plug-in unit through hole 81 is nonmetallic materials, namely described through hole 81 itself can be used as nonmetal thermal insulation layer.
Embodiment shown in Fig. 8, all the other structures of described conduit 10 are with the embodiment shown in Fig. 4 and Fig. 5.
Shown in Fig. 9 is the structure chart of ablating electrode 17 according to another embodiment of the invention.Described ablating electrode 17 comprises cylindrical side wall 77 and round and smooth end face 75, and described ablating electrode 17 can be that split is formed, and also can be integrally formed.Described round and smooth end face 75 is provided with aperture 72, flows out described ablating electrode 17 for perfusion fluid.Described cylindrical side wall 77 is provided with ring-shaped groove 73, the setting of described ring-shaped groove 73, and those skilled in the art can adopt conventional mode to arrange, such as, the mode described in US Patent No. 20080294158 can be adopted to arrange.
Shown in Figure 10 is the sectional view of ablating electrode 17 according to Fig. 9.Described ablating electrode 17 comprises a cavity 76, and the near-end of described electrode shell 71 is provided with plug-in unit 74.The near-end of described ablating electrode 17 is located at by described plug-in unit 74.Described plug-in unit 74 can be cylindrical, disc or other suitable shape, comprises through hole 81, and the remote extension of described through hole 81 is in the through hole 79 of described electrode shell 71.The extension of described through hole 81 and described plug-in unit 74 can be that one is formed, also can be that split is formed, as described in insertion hollow pipe in through hole 81, or be connected with pipeline or other suitable structure at the far-end of described through hole 81.The proximal openings of described through hole 81 in the near-end of described plug-in unit 74, the distal openings of described through hole 81 on the outer surface of described electrode shell 71, with the flush with outer surface of described electrode shell 71.The far-end of described through hole 81 is provided with temperature sensor 33, and described temperature sensor 33 is by being adhesively fixed.Described plug-in unit 74 also comprises through hole 80, and described through hole 80 is the fluid paths flowed into for perfusion fluid, and it can be central lumen, also can be eccentric chamber.
Described nonmetal thermal insulation layer 78, is located on described through hole 81.When the extension of described through hole 81 and described plug-in unit 74 are integrally formed, when described plug-in unit 74 is metal material, described nonmetal thermal insulation layer 78 is located at inwall and/or the outer wall of described through hole 81.When described plug-in unit 74 is nonmetallic materials, namely described through hole 81 itself can be used as nonmetal thermal insulation layer.When the extension of described through hole 81 and described plug-in unit 74 split are formed, when the extension of described through hole 81 is metal material, described nonmetal thermal insulation layer 78 is located at inwall and/or the outer wall of described through hole 81.When the extension of described plug-in unit through hole 81 is nonmetallic materials, namely described through hole 81 itself can be used as nonmetal thermal insulation layer.Described nonmetal thermal insulation layer 78 can be the inwall and/or the outer wall that all cover described through hole 81, also can be that part covers.Preferably, the far-end of the hollow pipe in described through hole 80 also can be provided with extension tube 83, its can by bonding, welding or other suitable mode be fixed; Described extension tube 83 also can be integrally formed with described hollow pipe.Described plug-in unit 74 can all be placed in the cavity of described electrode shell 71, also can partly be placed in the cavity of described electrode shell 71, as shown in Figure 10.
Embodiment shown in Fig. 9 and Figure 10, all the other structures of described conduit 10 can, with the embodiment shown in Fig. 4 and Fig. 5, also can be as the guide-tube structure in US Patent No. 20080294158.
Shown in Figure 11 is the sectional view of described ablating electrode 17 according to another embodiment of the present utility model; Shown in Figure 12 is the sectional view of ablating electrode 17 described in Figure 11.As is illustrated by figs. 11 and 12, described ablating electrode 17 comprises the cavity 76 of electrode shell 71 and inside thereof, and the near-end of described electrode shell 71 is located at by plug-in unit 74.Described plug-in unit 74 can be annular also can be other suitable shape, as cylindrical, and disc etc.Described plug-in unit comprises through hole 81, and the remote extension of described through hole 81 is in the through hole 79 of described electrode shell 71.The extension of described through hole 81 and described plug-in unit 74 can be that one is formed, also can be that split is formed, as described in insertion hollow pipe in through hole 81, or be connected with pipeline or other suitable structure at the far-end of described through hole 81.The proximal openings of described through hole 81 in the near-end of described plug-in unit 74, the distal openings of described through hole 81 on the outer surface of described electrode shell 71, with the flush with outer surface of described electrode shell 71.The far-end of described through hole 81 is provided with temperature sensor 33, and described temperature sensor 33 is by being adhesively fixed.The inwall of described through hole 81 is also welded with stainless steel tube, and the remote extension of draught line 21, to described stainless steel tube, is fixed by welding.
As shown in figure 12, perfusion channel, has near-end and far-end, and its far-end is extended in the first eccentric chamber 35 of elasticity head end pipe 31 by the central lumen 23 of joystick 11, catheter main body 12, is communicated with the fluid path of ablating electrode 17.In described perfusion channel, be provided with priming line 26, the far-end of described priming line 26 extends the far-end of the central lumen 23 arriving catheter main body 12 by described joystick 11, be connected with the first eccentric chamber 35 of described elasticity head end pipe 31.Do not have priming line in first eccentric chamber 35 of described elasticity head end pipe 31, perfusion fluid directly enters in the cavity 76 of described electrode shell 71 from the first eccentric chamber 35 and through hole 81.Described elasticity head end pipe 31 can also be four chambers or more chamber structure, and such perfusion fluid can be flowed in the cavity 76 of described electrode shell by least two eccentric chambers of described elasticity head end pipe 31.
The far-end of wire 25 is welded on described stainless steel tube, and is filled with fluid sealant at the far-end of described wire and the near-end of described through hole 81, avoids directly contacting with perfusion fluid.
Described through hole 81 is provided with nonmetal thermal insulation layer 78, and when the extension of described through hole 81 and described plug-in unit 74 are integrally formed, when described plug-in unit 74 is metal material, described nonmetal thermal insulation layer 78 is located at inwall and/or the outer wall of described through hole 81.When described plug-in unit 74 is nonmetallic materials, namely described through hole 81 itself can be used as nonmetal thermal insulation layer.When the extension of described through hole 81 and described plug-in unit 74 split are formed, when the extension of described through hole 81 is metal material, described nonmetal thermal insulation layer 78 is located at inwall and/or the outer wall of described through hole 81.When the extension of described plug-in unit through hole 81 is nonmetallic materials, namely described through hole 81 itself can be used as nonmetal thermal insulation layer.
Embodiment shown in Figure 11 and Figure 12, all the other structures of described conduit 10 are with the embodiment shown in Fig. 4 and Fig. 5, or the embodiment shown in Fig. 8.
The sectional view of the described ablating electrode 17 that what Figure 13 showed is according to another embodiment of the invention.As Figure 13 shows, described ablating electrode 17 comprises at least one fluid path 80, and described fluid path 80 has opening at the near-end of ablating electrode 17, and perfusion fluid can flow to the outer surface of ablating electrode 17 by fluid path 80.The approach that perfusion fluid flows through ablating electrode can have multiple, and such as, fluid path has multiple branch to extend to and is opened on ablating electrode outer surface.
As shown in figure 13, described ablating electrode 17 also comprises through hole 81, the distal openings of described through hole 81 on the outer surface of described electrode shell 71, with the flush with outer surface of described electrode shell 71.Described through hole 81 far-end is located in described temperature sensor 33, by being adhesively fixed.Described ablating electrode 17 also comprises a blind hole 82, and draught line 21 is fixed in described blind hole 82.Described through hole 80, through hole 81 and blind hole 82 are connected with three eccentricity chamber 37 with the eccentric chamber 36 of the first eccentric chamber 35, second of elasticity head end pipe 31 respectively.
Described nonmetal thermal insulation layer 78, all or part of inwall being located at described through hole 81.Described nonmetal thermal insulation layer 78 can be insulating tubular layer, inserts in described through hole 81, also can be coated non-metallic thermal insulation layer on described through hole 81 inwall.Described nonmetal thermal insulation layer 78 is made up of the material of heat insulating function, can be that nonmetallic materials are made, as macromolecular material is made, also can be pottery or be made up of other suitable nonmetallic materials.Described nonmetal thermal insulation layer 78 can adopt resistant to elevated temperatures nonmetallic materials to make.Also nonmetal thermal insulation layer 78 all or part ofly can be provided with in described fluid path 80.
The embodiment that Figure 13 shows, all the other structures of described conduit 10 are with the embodiment shown in Fig. 4 and Fig. 5 or with the guide-tube structure described in Chinese patent CN201020215408.8.
Figure 14 is the sectional view of the described ablating electrode 17 according to another embodiment of the present utility model.
As shown in figure 14, described ablating electrode 17 comprises the cavity 76 of electrode shell 71 and inside thereof, and the near-end of described electrode shell 71 is located at by plug-in unit 74.Described plug-in unit 74 can be cylindrical, disc or other suitable shape, and it at least comprises through hole 81, and the remote extension of described through hole 81 is in the through hole 79 of described electrode shell 71.The extension of described through hole 81 and described plug-in unit 74 can be that one is formed, also can be that split is formed, as described in insertion hollow pipe in through hole 81, or be connected with pipeline or other suitable structure at the far-end of described through hole 81.The proximal openings of described through hole 81 is in the near-end of described plug-in unit 74, and the remote extension of described through hole 81 is on the inner surface of described electrode shell 71, concordant with the inner surface of described electrode shell 71, also can extend partially in described electrode shell 71.The far-end of described through hole 81 is provided with temperature sensor 33, and described temperature sensor 33 is by being adhesively fixed.In the present embodiment, when described plug-in unit 74 is Split type structure with the extension of described through hole 81, a hollow pipe can be provided with in described through hole 81, the remote extension of described hollow pipe is on the inner surface of described electrode shell 71, concordant with the inner surface of described electrode shell 71, also can extend partially in described electrode shell 71, the far-end of described hollow pipe is enclosed construction.Described temperature sensor 33 is bonded and fixed to the far-end of described hollow pipe.The electrode shell thickness of described temperature sensor present position is for being less than 0.2mm.Preferably, the electrode shell thickness of described temperature sensor present position is for being less than 0.1mm.
Described plug-in unit 74 also comprises through hole 80, and described through hole 80 is fluid path, flows into for perfusion fluid.Described through hole 80 and through hole 81 are connected with the second eccentric chamber 36 with the first eccentric chamber 35 of elasticity head end pipe 31 respectively.
Described through hole 81 is provided with nonmetal thermal insulation layer 78, and when the extension of described through hole 81 and described plug-in unit 74 are integrally formed, when described plug-in unit 74 is metal material, described nonmetal thermal insulation layer 78 is located at inwall and/or the outer wall of described through hole 81.When described plug-in unit 74 is nonmetallic materials, namely described through hole 81 itself can be used as nonmetal thermal insulation layer.When the extension of described through hole 81 and described plug-in unit 74 split are formed, when the extension of described through hole 81 is metal material, described nonmetal thermal insulation layer 78 is located at inwall and/or the outer wall of described through hole 81.When the extension of described plug-in unit through hole 81 is nonmetallic materials, namely described through hole 81 itself can be used as nonmetal thermal insulation layer.
It can be directly contact that described temperature sensor 33 and described electrode shell are not poured between part that liquid directly cools, also can be that there is the connection by metal material, as welding, also can be the connection with nonmetallic heat conductive material, as heat-conducting glue is bonding, can also exist simultaneously by the connection of metal material and the connection of nonmetallic heat conductive material or other suitable method of attachment.Therefore, the heat conductivity between described temperature sensor 33 and the outer wall of described electrode shell 71 is better than the heat conductivity between described temperature sensor 33 and described fluid path.Electrode shell described in this utility model is not poured the part that liquid directly cools and refers to the part that electrode shell does not directly contact with perfusion fluid.Fluid path described in this utility model comprises the part that perfusion fluid flows through in described ablating electrode 17, comprises the part that hole 80 is interior, the cavity of electrode shell 17 76 is interior and electrode shell flows out for perfusion fluid.
Embodiment shown in Figure 14, all the other structures of described conduit 10 are with the embodiment shown in Fig. 4 and Fig. 5, or the embodiment shown in Figure 11 and Figure 12, also can be identical with other embodiment.
Embodiment of the present utility model is not limited to described in above-described embodiment; when not departing from spirit and scope of the present utility model; those of ordinary skill in the art, in form and details to the various changes and improvements that this utility model is made, are all considered to fall into protection domain of the present utility model.
Claims (13)
1. a renal artery ablation catheter, it is characterized in that comprising catheter main body, it has near-end, far-end and the central lumen run through wherein;
Melt part, comprise one section of elasticity head end pipe, have near-end, far-end and at least one through chamber, its near-end is fixedly connected with the far-end of catheter main body;
Ablating electrode, is fixedly connected on the far-end melting part, comprises the optional cavity in electrode shell, electrode shell and temperature sensor; Described electrode shell is provided with the fluid path flowed out for perfusion fluid, and described electrode shell near-end is provided with the fluid path flowed into for perfusion fluid; Be provided with conduction of heat isolation structure between described temperature sensor and fluid path, the electrode shell thickness of described temperature sensor present position is for being less than 0.2mm, and the surface area of described electrode shell is for being greater than 15 square millimeters;
Perfusion channel, has near-end and far-end, and its far-end is extended into by the central lumen of catheter main body and melts in chamber partly, is communicated with the fluid path supplying perfusion fluid to flow into of ablating electrode.
2. renal artery ablation catheter according to claim 1, it is characterized in that described electrode shell is provided with a through hole, described temperature sensor is located in described through hole.
3. renal artery ablation catheter according to claim 1 and 2, is characterized in that the near-end of described electrode shell is provided with plug-in unit, and the remote extension of described plug-in unit, to described cavity, comprises at least one through hole; On described plug-in unit, the remote extension of through hole is in the through hole of described electrode shell, its proximal openings is in the near-end of described plug-in unit, distal openings is on the outer surface of described electrode shell, and with the flush with outer surface of electrode shell, the far-end of the through hole of described plug-in unit is located in described temperature sensor.
4. renal artery ablation catheter according to claim 1 and 2, is characterized in that the near-end of described electrode shell is provided with plug-in unit, and the remote extension of described plug-in unit, to described cavity, comprises at least one through hole; On described plug-in unit, the remote extension of through hole is on the inner surface of described electrode shell, concordant with the inner surface of electrode shell, or part extends in described electrode shell; On described plug-in unit, the proximal openings of through hole is in the near-end of described plug-in unit, and far-end is opening or enclosed construction, and the far-end of the through hole of described plug-in unit is located in described temperature sensor.
5. renal artery ablation catheter according to claim 4, is characterized in that the electrode shell thickness of described temperature sensor present position is for being less than 0.1mm.
6. renal artery ablation catheter according to claim 1 and 2, it is characterized in that being provided with priming line in described perfusion channel, the far-end of described priming line extends by the central lumen of described catheter main body the far-end arriving the chamber melting part, is connected with the fluid path supplying perfusion fluid to flow into of ablating electrode.
7. renal artery ablation catheter according to claim 1 and 2, it is characterized in that being provided with priming line in described perfusion channel, the remote extension of described priming line, to the far-end of the central lumen of described catheter main body, is connected with at least one the through chamber melting part.
8. renal artery ablation catheter according to claim 1 and 2, is characterized in that described electrode shell is provided with some apertures on the surface, and described aperture orifice area summation is less than the area of smallest cross-sectional in the fluid path flowed into for perfusion fluid.
9. renal artery ablation catheter according to claim 1 and 2, it is characterized in that being provided with an annular electrode at described distal end of catheter, the distance between itself and ablating electrode is 0.5-5mm.
10. renal artery ablation catheter according to claim 9, is characterized in that the distance between described annular electrode and ablating electrode is 1-2mm.
11. renal artery ablation catheters according to claim 1 and 2, is characterized in that described conduction of heat isolation structure is nonmetal thermal insulation layer.
12. renal artery ablation catheters according to claim 11, is characterized in that described nonmetal thermal insulation layer is located at inwall and/or the outer wall of through hole on described plug-in unit.
13. renal artery ablation catheters according to claim 11, is characterized in that described nonmetal thermal insulation layer is made up of macromolecular material or pottery, or are gas thermal insulation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420547387.8U CN204274635U (en) | 2014-09-23 | 2014-09-23 | Renal artery ablation catheter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420547387.8U CN204274635U (en) | 2014-09-23 | 2014-09-23 | Renal artery ablation catheter |
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| Publication Number | Publication Date |
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| CN204274635U true CN204274635U (en) | 2015-04-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004448A (en) * | 2015-07-28 | 2015-10-28 | 张家港保税区佰昂特种玻璃有限公司 | Glass tube with temperature prompting function |
| JP2016097309A (en) * | 2014-11-24 | 2016-05-30 | バイオセンス・ウエブスター・(イスラエル)・リミテッドBiosense Webster (Israel), Ltd. | Irrigated ablation catheter with multiple sensors |
| CN109512481A (en) * | 2018-12-19 | 2019-03-26 | 首都医科大学附属北京安贞医院 | It is a kind of for treating the occlusion catheter and application method of coronary arterial perforation |
-
2014
- 2014-09-23 CN CN201420547387.8U patent/CN204274635U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016097309A (en) * | 2014-11-24 | 2016-05-30 | バイオセンス・ウエブスター・(イスラエル)・リミテッドBiosense Webster (Israel), Ltd. | Irrigated ablation catheter with multiple sensors |
| CN105004448A (en) * | 2015-07-28 | 2015-10-28 | 张家港保税区佰昂特种玻璃有限公司 | Glass tube with temperature prompting function |
| CN109512481A (en) * | 2018-12-19 | 2019-03-26 | 首都医科大学附属北京安贞医院 | It is a kind of for treating the occlusion catheter and application method of coronary arterial perforation |
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Denomination of utility model: Renal artery ablation catheter robot pusher Effective date of registration: 20170703 Granted publication date: 20150422 Pledgee: Pudong Development Silicon Valley Bank Co., Ltd. Beijing branch Pledgor: Synpatic Medical Technology (Beijing) Co., Ltd. Registration number: 2017990000564 |
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Date of cancellation: 20200515 Granted publication date: 20150422 Pledgee: Pudong Development Silicon Valley Bank Co., Ltd. Beijing branch Pledgor: SYNAPTIC MEDICAL (BEIJING) Co.,Ltd. Registration number: 2017990000564 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Renal artery ablation catheter robot pusher Effective date of registration: 20200527 Granted publication date: 20150422 Pledgee: Pudong Development Silicon Valley Bank Co.,Ltd. Beijing branch Pledgor: SYNAPTIC MEDICAL (BEIJING) Co.,Ltd. Registration number: Y2020110000006 |
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Date of cancellation: 20210402 Granted publication date: 20150422 Pledgee: Pudong Development Silicon Valley Bank Co.,Ltd. Beijing branch Pledgor: SYNAPTIC MEDICAL (BEIJING) Co.,Ltd. Registration number: Y2020110000006 |