CN104363847B - Electrode catheter - Google Patents

Electrode catheter Download PDF

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Publication number
CN104363847B
CN104363847B CN201380027075.2A CN201380027075A CN104363847B CN 104363847 B CN104363847 B CN 104363847B CN 201380027075 A CN201380027075 A CN 201380027075A CN 104363847 B CN104363847 B CN 104363847B
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mentioned
electrode
termination electrode
probe post
probe
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CN201380027075.2A
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CN104363847A (en
Inventor
田中裕生子
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Japan Lifeline Co Ltd
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Japan Lifeline Co Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/1492—Probes or electrodes therefor having a flexible, catheter-like structure, e.g. for heart ablation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
    • A61B2017/00292—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
    • A61B2017/003—Steerable
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
    • A61B2017/00292—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
    • A61B2017/003—Steerable
    • A61B2017/00318—Steering mechanisms
    • A61B2017/00323—Cables or rods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
    • A61B2018/00011—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids
    • A61B2018/00029—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids open
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
    • A61B2018/00345—Vascular system
    • A61B2018/00351—Heart
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
    • A61B2018/00345—Vascular system
    • A61B2018/00351—Heart
    • A61B2018/00357—Endocardium
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00636—Sensing and controlling the application of energy
    • A61B2018/00773—Sensed parameters
    • A61B2018/00791—Temperature
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B2018/1405—Electrodes having a specific shape
    • A61B2018/1417—Ball
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2218/00—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2218/001—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body having means for irrigation and/or aspiration of substances to and/or from the surgical site
    • A61B2218/002—Irrigation

Abstract

The present invention provides a kind of electrode catheter, it possess with probe post 10 and the front termination electrode 20 with head 21 flushing machine, multiple flushing openings 112 are configured in the front end reducing diameter part 10A of probe post 10, reducing diameter part 10A is internally formed multiple inclined bores 111 in front end, and the external diameter for making probe post 10 is (D1), a diameter of (D of head 212), it is (L from the distance of front-end edge of the rear end of front end reducing diameter part 10A to flushing opening 1121), it is (L from the distance of maximum gauge part of the front-end edge of flushing opening 112 to front termination electrode 202), the angle of inclination of front end reducing diameter part 10A is (β), when the angle of inclination of inclined bore 111 is (α), formula：D2=D1+2(L2Tan α-L1Tan β) to set up, angle of inclination (α) is 5.0～12.5 ° (removing 9.1～9.3 °).According to above-mentioned electrode catheter, liquid can be made fully to contact with the front end hemisphere face of the front termination electrode with head.

Description

Electrode catheter
Technical field
The present invention relates to electrode catheter, is more specifically related to install electrode in the front end of probe, and possesses to the electricity The electrode catheter of the mechanism of physiological saline and so on liquid is rinsed in pole.
Background technology
In the ablation probe (ablation catheter) as electrode catheter, in order to high temperature will be become when burning Front end cooling of electrode, also, the blood to the periphery of front termination electrode is stirred/diluted so as to prevent on the surface of front termination electrode Thrombosis are formed, using the structure for possessing flushing machine.
As the existing probe for possessing flushing machine, the multiple opening sprays from the surface for being formed at front termination electrode are described Penetrate by inside from probe post to the front termination electrode supply normal saline type structure (referring for example to patent documentation 1 with And patent documentation is 2).
Patent documentation 1：No. 2562861 publications of Japanese Patent No.
Patent documentation 2：Japanese Unexamined Patent Publication 2006-239414 publications
However, formed on the surface of front termination electrode the opening for rinsing it is existing known to exist in probe following (1)～ (4) problem as.
(1) when the surface of front termination electrode arranges opening, inevitably ora terminalis is formed in edge of opening etc..And, profit When being burnt with the front termination electrode for being formed with such ora terminalis, the electric current density of ora terminalis part becomes high, there is the part There is abnormal temperature rising so as to quickly form the misgivings of thrombosis.
(2) even if spraying normal saline from the opening on the surface for being formed at front termination electrode, also cannot be to the table of front termination electrode Face is sufficiently rinsed (use liquid covered surface), therefore, it is impossible to the surface of front termination electrode is sufficiently cool, in addition, cannot Fully prevent/suppress the formation of the thrombosis on surface.Particularly, physiology is sprayed in the perpendicular direction in axial direction to front termination electrode In probe described in the above-mentioned patent documentation 1 and patent documentation 2 of saline, the table as normal saline and front termination electrode cannot be made Face fully contacts, therefore the formation inhibition extreme difference of the cooling effect and thrombosis of electrode surface.
(3) due to multiple openings being formed in electrode surface, therefore cannot substantially ensure that the surface area of front termination electrode, it is impossible to enter The efficient burn treatment of row.
(4) in the inside of the front termination electrode for constituting ablation probe, it is usually mounted with the thermoelectricity pair that temperature is burnt for control Equitemperature sensor.However, form the opening for rinsing on the surface of front termination electrode (is internally formed physiology in front termination electrode The stream of saline) in the case of, because the normal saline flow through in stream is excessively cooled temperature sensor, as a result, nothing Method correctly determines the temperature of the tissue being present in around front termination electrode and is relatively low by temperature detection, as a result, making sometimes Burn temperature to rise to more than necessary.
In order to solve above-mentioned (1)～problem as (4), it is considered to from the surface washing of outside (rear end side) termination electrode forward Liquid.
However, in the case of from rear end laterally the surface washing liquid of the front termination electrode with head, it is impossible to make The maximum gauge part of liquid and relative above-mentioned front termination electrode is located at the electrode surface of the head of front (hereinafter referred to as " front end hemisphere face ") fully contact.
In addition, the front end face (front end face vertical with axis of a cylinder) in probe post forms the surface washing for termination electrode forward In the case of the opening of liquid, it is capable of minimum (for example, the multiple feelings being configured on circumference that are open of front termination electrode of flushing liquid Under condition, the size of the inner side of the circumference is accommodated in), it is impossible to carried out efficiently using the ablation probe for possessing such front termination electrode Burn treatment.
On the other hand, probe post outer peripheral face formed flushing opening in the case of, from opening liquid by Spray and cannot spray termination electrode forward in the vertical direction of axis of a cylinder.
The content of the invention
The present invention is completed based on above-mentioned situation.
1st purpose of the present invention is to provide the surface washing liquid of the front termination electrode can laterally from rear end with head The electrode catheter of body.
2nd purpose of the present invention is to provide and will not produce abnormal temperature rising in a part for front termination electrode when burning The formation inhibition of (high-temperature portion), the cooling effect on the surface of front termination electrode and the thrombosis on surface is excellent, further, it is possible to enter Electrode catheter going efficient burn treatment, possessing flushing machine.
3rd purpose of the present invention is to provide fills can liquid and the front end hemisphere face of the front termination electrode with head Point ground contact, and the hemispherical thrombosiss inhibition in front end is particularly excellent, electrode catheter that is possessing flushing machine.
4th purpose of the present invention is to provide can be to the front end of the head of the diameter more than external diameter with probe post The electrode catheter of the front end hemisphere face flushing liquid of electrode.
5th purpose of the present invention is to provide the temperature that can correctly determine the tissue around front termination electrode, energy It is enough reasonably to carry out burning electrode catheter control, possessing flushing machine of temperature.
(1) electrode catheter of the invention possesses：Probe post with the inner chamber as liquid flow path and with the probe post Front connect and the front termination electrode with head.Above-mentioned probe post has front end of the extreme direction undergauge for taper forward Reducing diameter part, is configured to multiple flushing openings of the surface washing liquid to above-mentioned front end electrode in the front end reducing diameter part, To the radial outside inclined side of the probe post, extreme direction extends forward on the side that is internally formed of the front end reducing diameter part of above-mentioned probe post And multiple inclined bores of each above-mentioned flushing opening are reached, above-mentioned electrode catheter is characterised by, makes above-mentioned probe post External diameter is (D1), a diameter of (D of the head of above-mentioned front termination electrode2), from the rear end of the front end reducing diameter part of above-mentioned probe post to The axis of a cylinder of the front-end edge of above-mentioned flushing opening to distance be (L1), the front-end edge from above-mentioned flushing opening is to above-mentioned front end The axis of a cylinder in the maximum gauge portion of electrode to distance be (L2), the angle of inclination of the front end reducing diameter part of above-mentioned probe post is (β), on When the angle of inclination for stating inclined bore is (α), formula (I)：0.95D2≤D1+2(L2Tan α-L1·tanβ)≤1.05D2Set up, Also, above-mentioned angle of inclination (α) is 5.0～12.5 ° (wherein, removing 9.1～9.3 °).
According to the electrode catheter of such composition, multiple flushing openings are configured by the front end reducing diameter part in probe post, Can make from each liquid for spraying of multiple flushing openings towards front extreme direction, it is spherical therefore, it is possible to laterally have from rear end The surface injection liquid of partial front termination electrode.
Liquid from each termination electrode injections forward of multiple flushing openings is along the surface of front termination electrode extreme direction forward Flowing, therefore compared with the existing probe for possessing flushing machine, make the cooling effect on the surface of front termination electrode excellent, also, Excellent thrombosiss inhibition is played by the blood of the near surface of termination electrode before fully stirring/dilution.
Further, since flushing opening is formed at probe post, therefore it is open without the need for being formed in front termination electrode.Thus, front The ora terminalis that termination electrode does not have the formation of adjoint opening and produces, therefore, part generation when burning not in front termination electrode is different Normal temperature rises, and thus, the formation of thrombosis is suppressed.
Therefore, electrode catheter of the invention is compared with the existing known probe for possessing flushing machine, front termination electrode table The thrombosiss inhibition in face especially excellent.
Further, since be open without the need for being formed in front termination electrode, therefore, it is possible to guarantee enough surface areas, as ablation probe Efficient burn treatment can be carried out.
Also, be internally formed multiple inclined bores in the front end reducing diameter part of probe post, above-mentioned multiple inclined bore sides to The radial outside inclined side of probe post forward extreme direction extend to flushing opening each, also, due to above-mentioned formula (I) into The angle of inclination (α) of vertical and inclined bore is determined, therefore, it is possible to the liquid for making to spray from flushing opening by the inclined bore Body reach with head front termination electrode maximum gauge portion electrode surface vicinity, in addition, can make the liquid and The front end hemisphere face of front termination electrode is fully contacted (reliably rinse front end hemisphere face).
Also, it is determined by making the angle of inclination (α) of above-mentioned formula (I) establishment and inclined bore, can be made by this Inclined bore is electric with the front end of the head of the diameter having more than the external diameter of probe post from the liquid that flushing is sprayed with opening The front end hemisphere face of pole is fully contacted.
Additionally, " flushing opening " can be across the rearward end of the front end reducing diameter part of probe post and front termination electrode shape Into the front-end edge of the flushing opening of such case is present in the rearward end of front termination electrode.
(2) preferably, in the electrode catheter of the present invention, above-mentioned angle of inclination (α) is 7.0～8.0 °, 9.4～9.9 ° or 10.5～12.0 °.
(3) in particular it is preferred to, above-mentioned angle of inclination (α) is 9.4～9.9 ° or 10.5～12.0 °.
(4) preferably, in the electrode catheter of the present invention, the diameter (D of above-mentioned probe post1) for 1.0～3.0mm, it is above-mentioned away from From (L1) for 1.0～3.0mm, above-mentioned distance (L2) for 1.0～2.5mm, above-mentioned angle of inclination (β) is 5.0～30.0 °.
(5) in addition, the electrode catheter of the present invention possesses：Probe post with the inner chamber as liquid flow path and with this The front of probe post connects and the front termination electrode with head, and it is taper that above-mentioned probe post has extreme direction undergauge forward Front end reducing diameter part, be configured to multiple flushings of the surface washing liquid to above-mentioned front end electrode with opening in the front end reducing diameter part Mouthful, radial outside inclined side forward extreme direction of the side to the probe post is internally formed in the front end reducing diameter part of above-mentioned probe post Multiple inclined bores of each above-mentioned flushing opening are extended to, above-mentioned electrode catheter is characterised by, make above-mentioned front termination electrode Head a diameter of (D2), the above-mentioned front end reducing diameter part or above-mentioned front termination electrode of the front-end edge of above-mentioned flushing opening External diameter be (D3), from the axis of a cylinder in maximum gauge portion of the front-end edge of above-mentioned flushing opening to above-mentioned front termination electrode to distance For (L2), when the angle of inclination of above-mentioned inclined bore is (α), formula (II)：0.95D2≤D3+2(L2·tanα)≤1.05D2Set up, Also, above-mentioned angle of inclination (α) is 5.0～12.5 ° (wherein, removing 9.1～9.3 °).
According to such electrode catheter for constituting, due to above-mentioned formula (II) establishment and angle of inclination (α) quilt of inclined bore It is determined that, can make to reach front termination electrode with head most from the liquid that flushing opening sprays by the inclined bore The vicinity of the electrode surface in major diameter portion, in addition, the liquid can be made fully to contact with the front end hemisphere face of front termination electrode (can Front end hemisphere face is rinsed by ground).
(6) preferably, in the electrode catheter of the present invention, temperature biography is installed in relatively above-mentioned flushing opening forward side Sensor, specifically, is provided with temperature sensor in the inside of above-mentioned front termination electrode.
According to such electrode catheter for constituting, due to not being internally formed liquid in the front termination electrode for being provided with temperature sensor Body stream, therefore temperature sensor is not excessively cooled, and can correctly determine the temperature of the tissue around front termination electrode, Appropriate control can be carried out to burning temperature.
Electrode catheter of the invention, the whole area in surface can laterally from rear end with the front termination electrode of head Domain flushing liquid.
Electrode catheter of the invention, part when burning not in front termination electrode produce abnormal temperature rising, front The formation inhibition of the thrombosis on the surface of the cooling effect on the surface of termination electrode and front termination electrode is excellent, further, it is possible to enter The efficient burn treatment of row.
Electrode catheter of the invention, fills can liquid and the front end hemisphere face of the front termination electrode with head Divide ground contact, therefore, the electrode catheter of the present invention is especially excellent to the hemispherical thrombosiss inhibition in front end.
Electrode catheter of the invention, can reliably to the head of the diameter more than external diameter with probe post Front termination electrode front end hemisphere face flushing liquid.
Description of the drawings
Fig. 1 is the front view of the ablation probe of an embodiment of the electrode catheter of the present invention.
Fig. 2 is the sectional elevation of the probe post for constituting the ablation probe shown in Fig. 1 (along the section view of the II-II lines of Fig. 1 Figure).
Fig. 3 is the longitudinal section of the inside of the fore-end for illustrating the ablation probe shown in Fig. 1 (along the III-III of Fig. 2 The sectional view of line).
Fig. 4 is the longitudinal section of the inside of the fore-end for illustrating the ablation probe shown in Fig. 1 (along the III-III of Fig. 2 The sectional view of line).
Fig. 5 is the vertical of the inside of the fore-end of the ablation probe of the other embodiment of the electrode catheter for illustrating the present invention Sectional view.
Specific embodiment
(the 1st embodiment)
Hereinafter, one embodiment of the electrode catheter of the present invention is illustrated using accompanying drawing.
Electrode catheter shown in Fig. 1 to Fig. 4 is the ablation probe used by the treatment of the arrhythmia of heart.
The ablation probe 100 of present embodiment possesses：Probe post 10, its there is central lumen 13 for break-through such as wires with And equiangularly be configured at around which 10 of interval (36 ° interval) sub- inner chamber (as 8 inner chambers 11 of liquid flow path, with And as pulls wire 31,32 insert path 2 inner chambers 12)；Front termination electrode 20, which is connected simultaneously with the front of probe post 10 With head 21；Ring electrode 40, which is installed in the fore-end of probe post 10；Joystick 70, itself and probe post 10 rear end side connection；The ascending pipe 80 of liquid；And temperature sensor (thermoelectricity to) 90, which is installed in front termination electrode 20 Inside, probe post 10 have front end reducing diameter part 10A of the extreme direction undergauge for taper forward, and in the front end, reducing diameter part 10A configures 8 For the flushing opening 112 of the surface washing liquid of termination electrode 20 forward, in the inside of the front end reducing diameter part 10A of probe post 10 8 inclined bores 111 are formed, above-mentioned 8 inclined bores 111 are each communicated with rear end side and 8 inner chambers 11, while to probe post Extreme direction extends to the respective of flushing opening 112 to 10 radial outside inclined side forward, in above-mentioned electrode catheter, makes probe The external diameter of post 10 is (D1), a diameter of (D of the head 21 of front termination electrode 202), from the front end reducing diameter part 10A of probe post 10 Rear end to the front-end edge of flushing opening 112 axis of a cylinder to distance be (L1), from flushing with the front-end edge of opening 112 to front The axis of a cylinder of the maximum gauge part of termination electrode 20 to distance be (L2), the angle of inclination of the front end reducing diameter part 10A of probe post 10 For (β), when the angle of inclination of inclined bore 111 is (α), formula (1)：D2=D1+2(L2× tan α-L1× tan β) set up, and And, angle of inclination (α) is 5.0～12.5 ° (wherein, removing 9.1～9.3 °).
Here, Fig. 3 and Fig. 4 are illustrated using the central shaft comprising central lumen 13 and 2 inner chambers 11 shown in Fig. 2 Plane carries out the vertical section after cutting.
Therefore, 2 inner chambers 11 in " as 8 inner chambers 11 of liquid flow path " are only shown in Fig. 3 and Fig. 4, " 8 are inclined 2 inclined bores 111 in oblique inner chamber 111 ", 2 in " 8 are rinsed with opening 112 " are rinsed with openings 112.
Ascending pipe 80 shown in Fig. 1 is connected with probe post 10 by the inside of joystick 70, by the ascending pipe 80 to The inner chamber 11 of probe post 10 supplies liquid.Here, normal saline can be illustrated as " liquid ".
Joystick 70 shown in Fig. 1 is connected with the rear end side of probe tube 10, is possessed and is deflected for the front end for carrying out probe The swivel plate 75 of operation.
As shown in Fig. 2 be formed with the probe post 10 for constituting ablation probe 100 supplying and front termination electrode 20, ring electrode 40 The central lumen 13 of wire of connection etc. (omit diagram) break-through and equiangularly the interval of (36 °=360 °/10) is configured at 10 strip inner chambers around the central lumen 13.
There is identical external diameter each other with 10 strip inner chambers being formed at around central lumen 13 at equal intervals.To 10 strips 2 inner chambers 12 in inner chamber are inserted respectively for carrying out the pulls wire 31,32 of the front end deflecting operation of probe.
And, liquid flow path is constituted using 8 inner chambers 11 for not inserting pulls wire 31,32.
The respective rear end of the pulls wire 31,32 shown in Fig. 2 and the swivel plate 75 (with reference to Fig. 1) of joystick 70 link, The front end of pulls wire 31,32 is connected and fixed on the leading section of such as probe post 10.
Thus, for example, if making swivel plate 75 rotate to the A1 directions shown in Fig. 1, pulls wire 31 is pulled, ablation probe 100 fore-end is to arrow A directions deflection action, if making swivel plate 75 rotate to the B1 directions shown in Fig. 1, pulls wire 32 It is pulled, the fore-end of ablation probe 100 is to arrow B directions deflection action.
15 is in order that the deflecting operation of pulls wire 31,32 rigid body that reliably carries out and be embedded in probe post 10.
Rigid body 15 is made up of the metal bar spring such as Ni-Ti alloys, using local inclination direction (pulls wire 31, 32 orientation) rigid body 15,15 of vertical direction arrangement is able to ensure that the anisotropy of bending direction.
Probe post 10 can be made up of the material with identical characteristics vertically, but it is preferred that (hard using rigidity vertically Degree) different materials is integrally formed.Specifically, the constituent material of preferred peri position side has of a relatively high rigidity, and The constituent material of amphi position side has relatively low rigidity.
Probe post 10 is by such as polyolefin, polyamide, polyether-polyamide, polyurethane, nylon, PEBAX (polyethers Block amides) etc. synthetic resin constitute.In addition, the peri position side of probe post 10 can also be using rustless steel strands weave by The blade tube of the pipe that these synthetic resin are constituted.
External diameter (the D of probe post 101) (external diameter of the part beyond the reducing diameter part 10A of front end) preferably 1.0～3.0mm, more Preferably 1.3～3.0mm, particularly preferably 1.6～2.7mm.
The length of probe post 10 is preferably 600～1500mm, more preferably 900～1200mm.
As shown in Figure 3 and 4, probe post 10 has the front end reducing diameter part 10A of extreme direction undergauge forward, contracts in the front end Footpath portion 10A's is internally formed inclined bore 111.
For inclined bore 111, side is connected with the inner chamber 11 (non-inclined inner chamber) as liquid flow path thereafter, and And, while extreme direction extends forward to the radial outside inclined side of probe post 10, the outer peripheral face opening of reducing diameter part 10A in front end.Should Be open as flushing opening 112,8 flushing openings 112 are formed along the periphery of front end reducing diameter part 10A.
Additionally, the rear end (front end of inner chamber 11) of inclined bore 111 may be located at the post part beyond the reducing diameter part 10A of front end Inside.
To the radial outside inclined side of probe post 10, extreme direction extends forward on the respective side of inclined bore 111.Thus, pass through The liquid that inclined bore 111 is sprayed from flushing with opening 112 in the front of the axial direction of probe post 10, and to the outside of radial direction Injection.Therefore, it is possible to big front termination electrode (for example diameter more than external diameter, with probe post 10 to a certain extent of size Head front termination electrode) surface be rinsed.
The front termination electrode 20 for constituting ablation probe 100 has head 21, cervical region 22, cylindrical portion 23.
As shown in Figure 3 and 4, front termination electrode 20 is inserted through by its cylindrical portion 23 and is fixed on front end reducing diameter part The inside of 10A and be connected with the front of probe post 10.
In above-mentioned ablation probe 100, a diameter of of the head 21 suitable with the maximum gauge of front termination electrode 20 is made (D2), from the rear end of the front end reducing diameter part 10A of probe post 10 to flushing with the front-end edge of opening 112 (in edge of opening, in most The part of front) axis of a cylinder to distance be (L1), it is straight with the maximum of front-end edge to the front termination electrode 20 of opening 112 from flushing The axis of a cylinder of path portion to distance be (L2), the angle of inclination of the front end reducing diameter part 10A of probe post 10 is (β), inclined bore 111 Angle of inclination be (α) when,
Formula (1)：D2=D1+2(L2× tan α-L1× tan β) set up.
Here, the external diameter of the front end reducing diameter part 10A rinsed on the front-end edge with opening 112 (links each of multiple front-end edges From diameter of a circle) D can be used1- 2L1Tan β are represented.
On the other hand, with the spray angle equal with the angle of inclination of inclined bore 111 (α) from flushing opening 112 The liquid of front-end edge extreme direction injection forward is in axis of a cylinder to displacement (L2) when, in the direction (footpath of post axially vertical with post To) mobile L2The distance of tan α.
Thus, the liquid for ejecting from the front-end edge of flushing opening 112 is in axis of a cylinder to displacement (L2) it is mobile when, even Tie a diameter of D of the imaginary circle of the position reached by the liquid1- 2L1·tanβ+2·L2Tan α=D1+2(L2· Tan α-L1·tanβ)。
Therefore, the ablation probe 100 set up according to above-mentioned formula (1), i.e., suitable with the maximum gauge of front termination electrode 20 Diameter (the D of head 212) the imaginary diameter of a circle (D that links with the position that reaches liquid1+2(L2Tan α- L1Tan β)) usual consistent ablation probe 100, reach can the liquid that the front-end edge from flushing opening 112 is ejected The vicinity of the electrode surface of the maximum gauge part of front termination electrode 20.
In the diagram, the outer plug wire EX after the straight line extrapolation (prolongation) of the inner side of division inclined bore 111 is schematically illustrated The walking along the street of the liquid sprayed with the front-end edge of opening 112 from flushing.
In ablation probe 100, from the rear end of the front end reducing diameter part 10A of probe post 10 to flushing with the front end of opening 112 The axis of a cylinder of edge to distance (to the projector distance of the central shaft of probe post 10) (L1) 1.0～3.0mm is preferably, more preferably 1.5～2.7mm.
In above-mentioned distance (L1) it is too small in the case of, it is impossible to meet above-mentioned formula (1), in order to meet above-mentioned formula (1), no Obtaining does not make the angle of inclination of inclined bore 111 become big (more than 12.5 °), so as to constitute the electrode catheter of the present invention.
On the other hand, in above-mentioned distance (L1) it is excessive in the case of, the distance of inclined bore 111 is long, processing become tired It is difficult.Further, since ring electrode 40 cannot be arranged in inclined bore 111, therefore produce ring electrode 40 and front termination electrode 20 interval is excessive, and the design for deferring to the requirement for making these electrode gap diminish becomes difficult problem.
The angle of inclination (β) of the front end reducing diameter part 10A of probe post 10 is preferably 5.0～30.0 °, more preferably 7.0～ 20.0°。
In the case where above-mentioned angle of inclination (β) is too small, due in order to obtain the angle of inclination of inclined bore 111, producing Will be apart from (L1) excessive demand is designed as, so as to cause problem same as described above.
On the other hand, in the case where above-mentioned angle of inclination (β) is excessive, the distance of inclined bore 111, particularly to flushing Diminished with the distance (in Fig. 4, dividing the air line distance in the outside of inclined bore 111) of the end edge of opening 112, exist and will spray The impaired misgivings of the liquid guiding function that extreme direction is extruded forward.And, the liquid for now spraying mistake to the outer direction at once Degree extension, becomes over so as to spread.
- the 2L of above-mentioned formula (1)1Tan β with from the rear end of front end reducing diameter part 10A to flushing with before opening 112 The cut-off of the front end reducing diameter part 10A of ora terminalis is suitable.
In 2L1In the case that tan β are excessive, due to the diameter of probe post it is excessive, so the overall design of probe becomes It is difficult.
From flushing with the axis of a cylinder of the front-end edge of opening 112 to the maximum gauge part of front termination electrode 20 to distance (visiting The projector distance of the central shaft of pin post 10) (L2) it is preferably 1.0～2.5mm, more preferably 1.2～2.0mm.
In above-mentioned distance (L2) it is too small in the case of, the liquid sprayed with opening from flushing is by the rear end part of head Blocking becomes difficult so as to the vicinity for reaching the electrode surface of maximum gauge part.
On the other hand, in above-mentioned distance (L2) it is excessive in the case of, the liquid sprayed with opening from flushing reaches maximum straight The vicinity of the electrode surface of path portion becomes difficult.
In ablation probe 100, the angle of inclination (α) of inclined bore 111 for 5.0～12.5 ° (wherein remove 9.1～ 9.3°)。
Above-mentioned formula (1) is set up, also, above-mentioned angle of inclination (α) is more than 5 °, thus enables that the spherical of front termination electrode 20 Diameter (the D of part 212) it is for carrying out (for example, the diameter phase of head 21 of size necessary to efficiently burn treatment Ratio (D to the external diameter of probe post 102/D1) for more than 0.7).
In the case that above-mentioned angle of inclination is less than 5 °, the diameter of the head of front termination electrode is too small, above-mentioned using possessing The ablation probe of such front termination electrode cannot efficiently carry out burn treatment.
In addition, above-mentioned angle of inclination (α) is less than 12.5 °, thus enable that by inclined bore 111 from flushing opening 112 forward termination electrode 20 maximum gauge part injection liquid reliably reach maximum gauge part electrode surface it is attached Closely.
In addition, simultaneously edge is sprayed from flushing opening 112 to by the inclined bore 111 that angle of inclination (α) is less than 12.5 ° The liquid stabilising ground effect of the shape flowing of front termination electrode 20 makes center position (inner side) of the above-mentioned flowing towards front termination electrode 20 Power (based on the liquid for flowing about to electrode surface and the current difference (pressure of liquid for separating from electrode surface and flow Difference) power), thus, the liquid for reaching the vicinity of the electrode surface of maximum gauge part is then able to form covering front end hemisphere The such flowings of face 21A, (are reliably rinsed thereby, it is possible to make liquid fully be contacted with the front end hemisphere face 21A of front termination electrode Front end hemisphere face 21A).
In the case where the angle of inclination of inclined bore is excessive, even from flushing with opening 112 towards front termination electrode 20 Maximum gauge part injection liquid, cannot also make aforesaid liquid fully reach the attached of the electrode surface of maximum gauge part Closely, even if in addition, also easily spreading for the liquid near the electrode surface of arrival maximum gauge part, formation covers front end hemisphere The flowing of liquid as face becomes difficult.
As a result, shown in comparative example 4 as be described hereinafter, it is impossible to liquid is fully contacted with front end hemisphere face.
In addition, the research of inventor of the invention, even meet above-mentioned formula (1), also, inclined bore is inclined Electrode catheter of the rake angle (α) in 5.0～12.5 ° of scopes, be able to confirm that be limited at 9.1 at the angle of inclination (α)～ In the case of 9.3 °, cannot also make liquid that (with reference to comparative example described later) is fully contacted with front end hemisphere face.
Also it is not very clearly, but to speculate the center position due to making the flowing of liquid towards front termination electrode with regard to above-mentioned reason The power of (inner side) is being defined to become unstable in the range of above-mentioned angle of inclination (α), covers front end half so as to be formed The flowing of liquid as sphere.
According to reason as described above, the angle of inclination (α) of inclined bore 111 be usually 5.0～9.0 ° or 9.4～ 12.5 °, preferably 7.0～8.0 °, 9.4～9.9 ° or 10.5～12.0 °, particularly preferably 9.4～9.9 ° or 10.5～ 12.0°。
Diameter (the D of the head 21 suitable with the maximum gauge of front termination electrode 202) according to the external diameter of probe post 10 (D1), above-mentioned distance (L1), above-mentioned distance (L2), above-mentioned angle of inclination (β), above-mentioned angle of inclination (α) based on above-mentioned formula (1) determining, the angle of inclination (α) of inclined bore 111 is bigger, then diameter (the D of head 212) also become big.
As the diameter (D of the above-mentioned head 21 being determined2) preferably 1.0～3.0mm, more preferably 1.5 ～2.5mm, particularly preferably 1.7～2.3mm.
As the diameter (D of the head 21 of front termination electrode 202) with the external diameter (D of probe post 101) ratio (D2/D1) Preferably 0.5～1.5, more preferably 0.7～1.0.
In (D2/D1) value too small (such as less than 0.5) in the case of, using the spy for possessing front termination electrode as described above Pin carries out efficient burn treatment becomes difficult.
On the other hand, in (D2/D1) value it is excessive in the case of, the surface washing to front termination electrode as described above is enough The liquid of amount becomes (fully produce the formation inhibition of cooling effect/thrombosis) difficult.
As shown in Figure 3 and 4, install by the thermoelectricity equity structure that temperature is burnt for control in the inside of front termination electrode 20 Into temperature sensor 90.In addition, the 95 break-through central lumen 13 of wire being connected with temperature sensor 90.
Using (during burn treatment) during ablation probe 100, the peripheral group of front termination electrode 20 is determined using temperature sensor 90 The temperature knitted, the temperature of the measurement are fed back so as to carry out burning the control (adjustment of high-frequency energy) of temperature.
According to the ablation probe 100 of present embodiment, contracted by 8 flushing openings 112 to be configured at the front end of taper Footpath portion 10A, can make the liquid of each self-injection from flushing opening 112 towards front extreme direction, therefore, it is possible to lateral from rear end The surface injection liquid of front termination electrode 20.
And, from rear end side (flushing for being configured in the front end reducing diameter part 10A of probe post 10 is respective with opening 112) to Rearward end (cervical region 22) forward end (head 21) of liquid the past termination electrode 20 of the injection of front termination electrode 20 is along front end The extreme direction flowing forward of the surface of electrode 20, the blood of the periphery of front termination electrode 20 and are possessed flushing by fully stirring/dilution The existing probe of mechanism compares, and the cooling effect on the surface of front termination electrode 20 is excellent, also, by fully stirring/it is dilute Release the blood of the near surface of front termination electrode 20 and play excellent thrombosiss inhibition.
In addition, being internally formed radial outside inclined side of the side to probe post 10 in the front end reducing diameter part 10A of probe post 10 Extreme direction extends to respective 8 inclined bores 111 of flushing opening 112 forward, therefore respective with opening 112 from flushing The liquid of injection is by (front of the axial direction of probe post 10 and the outside of radial direction) injection on the outside of extreme direction forward.Here, liquid Spray angle it is consistent with the angle of inclination (α) of inclined bore 111.
In addition, being internally formed radial outside inclined side of the side to probe post 10 in the front end reducing diameter part 10A of probe post 10 Extreme direction extends and respective 8 inclined bores 111 of arrival flushing opening 112 forward, also, above-mentioned formula (1)：D2= D1+2(L2Tan α-L1Tan β) set up, also, the angle of inclination (α) of inclined bore (wherein, is removed for 5.0～12.5 ° 9.1～9.3 °), thus enable that termination electrode before reaching by the liquid that above-mentioned inclined bore 111 is sprayed from flushing opening 112 The vicinity of the electrode surface of 20 maximum gauge part, in addition, the front end hemisphere face 21A of the liquid and front termination electrode 20 can be made Fully contact (reliably rinse front end hemisphere face 21A) (with reference to embodiment described later 1～15).
Even if in addition, the head 21 of front termination electrode 20 has the external diameter (D of probe post 101) more than diameter (D2), The maximum gauge part of termination electrode 20 before can making to reach by the liquid that inclined bore 111 is sprayed from flushing opening 112 The vicinity of electrode surface, in addition, the liquid can be made fully to contact with the front end hemisphere face 21A of front termination electrode 20 (with reference to after The embodiment 12 stated～15).
In addition, flushing opening 112 is formed on the probe post 10 (front end reducing diameter part 10A) of insulating properties, due in conduction There is no ora terminalis in the front termination electrode 20 of property, therefore (when burning) will not be the one of front termination electrode 20 when using ablation probe 100 Part produces abnormal temperature and rises (high-temperature portion), such high-temperature portion and contacting blood and the formation of thrombosis that formed is pressed down System.
Further, since without the need for forming the opening for rinsing in front termination electrode 20, therefore, it is possible to guarantee enough surface areas, energy It is enough to carry out efficient burn treatment as ablation probe.
In addition, by relative flushing 112 forward side mounting temperature sensor 90 of opening, without the need for being provided with temperature The stream for being internally formed liquid of the front termination electrode 20 of sensor 90, therefore temperature sensor 90 is not excessively cooled, can The temperature of the tissue around front termination electrode 20 is determined correctly.
For the ablation probe 100 shown in Fig. 4, above-mentioned formula (1)：D2=D1+2(L2Tan α-L1Tan β) into It is vertical, but the inventor of the present invention result conscientiously studied is repeated is by making D1+2(L2Tan α-L1Tan β) value In 0.95D2～1.05D2Scope, also, angle of inclination (α) is 5.0～12.5 ° (wherein, removing 9.1～9.3 °), can be true Recognizing to make the liquid sprayed by inclined bore and from flushing opening fully contact with the front end hemisphere face of front termination electrode (reliably rinsing front end hemisphere face).
D1+2(L2Tan α-L1Tan β) value be less than 0.95D2When, one of the liquid sprayed with opening from flushing Divide and blocked by the rear end part of head, enough liquid is contacted with the front end hemisphere face of front termination electrode becomes difficult.
On the other hand, D1+2(L2Tan α-L1Tan β) value more than 1.05D2In the case of, cannot make from punching sometimes Reach near the electrode surface of maximum gauge part of front termination electrode 20 with washing the efficient liquid with opening injection.
The 2nd embodiment ＞ of ＜
Ablation probe 105 shown in Fig. 5 possesses with 10 strip inner chambers (as 8 inner chambers 51, Yi Jizuo of liquid flow path For 2 inner chambers of the insert path of pulls wire) probe post 50, the probe post 50 with towards front extreme direction undergauge for taper Front end reducing diameter part 50A, in the front end, reducing diameter part 50A is configured to 8 flushing use of the surface washing liquid of termination electrode 20 forward Opening 512, is internally formed 8 inclined bores 511, above-mentioned 8 inclined bores 511 in the front end reducing diameter part 50A of probe post 50 In each communicating with for rear end side and 8 inner chambers 51 (non-inclined inner chamber), while to the radial outside inclined side forward end of probe post 10 Direction extends and reaches the respective of flushing opening 512.
Additionally, in Figure 5, identical reference is used with the 100 identical element of ablation probe shown in Fig. 4.
In addition, figure 5 illustrates 2 inner chambers 51 in " as 8 inner chambers 51 of liquid flow path ", " 8 inclined bores 511 " 2 inclined bores 511 in, 2 in " 8 are rinsed with opening 512 " are rinsed with opening 512.
Constitute ablation probe 105 front termination electrode 20 rearward end (cervical region 22) formed liquid guiding groove 26, its with Inclined bore 511 it is respective continuous, to incline with the angle of inclination of inclined bore 511 (α) identical angle.
Thus, flushing with opening 512 across the front end reducing diameter part 50A and front termination electrode 20 of probe post 50 cervical region 22 and shape Into the front-end edge of flushing opening as described above 512 is present in the cervical region 22 of front termination electrode 20.
By forming above-mentioned guiding groove 26, the flushing opening 512 from the cervical region 22 positioned at front termination electrode 20 can be made The spray angle of the liquid of front-end edge injection is consistent with the angle of inclination (α) of inclined bore 511.
In the ablation probe 105 shown in Fig. 5, a diameter of (D of the head 21 of termination electrode 20 before order2), rinse and use The external diameter of the front termination electrode 20 (cervical region 22) of the front-end edge of opening 512 is (D3), from flushing with the front-end edge of opening 512 to front end The axis of a cylinder of the maximum gauge part of electrode 20 to distance be (L2), when the angle of inclination of inclined bore 511 is (α), formula (2)：D2 =D3+2(L2Tan α) set up, also, angle of inclination (α) is 5.0～12.5 ° (but removing 9.1～9.3 °).
According to the ablation probe 105 of above-mentioned embodiment, can make to spray from flushing opening 512 by inclined bore 511 The liquid penetrated reaches the vicinity of the electrode surface of the maximum gauge part of front termination electrode 20, in addition, the liquid and front end can be made The front end hemisphere face 21A of electrode 20 is fully contacted (reliably rinse front end hemisphere face 21A).
For the ablation probe 105 shown in Fig. 5, above-mentioned formula (2)：D2=D3+2(L2Tan α) set up, but the present invention Inventor the result conscientiously studied is repeated is by making D3+2(L2Tan α) value be in 0.95D2～1.05D2Model Enclose, also, angle of inclination (α) is 5.0～12.5 ° (but removing 9.1～9.3 °), can make to use from flushing by inclined bore The liquid of opening injection is fully contacted with the front end hemisphere face of front termination electrode (reliably rinse front end hemisphere face).
More than, embodiments of the present invention are illustrated, but the present invention is not limited to these, can be carried out various Change.
For example, the bar number for being formed at the inclined bore of the inside of front end reducing diameter part is not limited to 8, can be such as 4～12 Scope properly selected.
In addition, intermediate member is clamped between part beyond by making front end reducing diameter part and front end reducing diameter part (internally having Have the intermediate member of the unit that liquid is collaborated and/or shunted), it is formed at the bar number of the inclined bore of the inside of front end reducing diameter part Can be with difference with the bar number of the inner chamber (as the inner chamber of liquid flow path) of the inside of the part being formed at beyond the reducing diameter part of front end.
In addition, as comprising front end reducing diameter part fore-end constituent material, can adopt with said front part with The constituent material of outer post part different material (for example, the aromatic polyether ketone such as polyether-ether-ketone (PEE K), ceramic material Deng).
Embodiment
1 ＞ of ＜ embodiments
For section with Fig. 3 and as shown in Figure 4 is constituted, the external diameter (D of probe post 101) for 2.4mm, it is above-mentioned away from From (L1) for 2.63mm, the angle of inclination (β) of front end reducing diameter part 10A is 10.0 °, above-mentioned distance (L2) for 1.21mm, inclined bore 111 angle of inclination (α) is 5.0 °, the diameter (D of the head 21 of front termination electrode 202=D1+2(L2Tan α-L1·tan It is β) 1.68mm, (D2/D1) value be 0.70 ablation probe 100, with the shape by above-mentioned amphi position end partial immersion in blood In the case of normal saline is rinsed in state, using analysis software " SoLiDWorks FLow SimuLATioN " (DAssAuLT SysTEms SoLiDWorks CorPorATioN company systems) liquid that the front end hemisphere face 21A with front termination electrode 20 is contacted The existence of the normal saline in (blood and/or normal saline) is simulated.
As a result, the existence rate (ratio containing normal saline in liquid) of normal saline is connect by more than 40% liquid The ratio (electrode surface accounts for the ratio of the whole area of front end hemisphere face 21A) of tactile electrode surface for 95% area more than, According to the style of the embodiment 1, can confirm that to make normal saline fully contact with front end hemisphere face.
Here, the setup parameter in above-mentioned analysis software is as follows.
(1) blood：
Viscosity=7.6 × 10-3PA·s
Temperature=37 DEG C (suitable with body temperature)
Pressure=100mmHg (suitable with blood pressure)
(2) normal saline
Temperature=25 DEG C
Emitted dose=5～15cc/min
1～4 ＞ of ＜ embodiments 2～15 and comparative example
According to table 1 below, for except to above-mentioned distance (L1), above-mentioned distance (L2), the angle of inclination (α) of inclined bore And diameter (the D of head2) carried out changing outer ablation probe same as Example 1, to similarly to Example 1 with The existence of the normal saline in the liquid of the front end hemisphere face contact of front termination electrode is simulated.As a result (normal saline The ratio of the electrode surface that existence rate is contacted by more than 40% liquid) in the lump with table 1 below representing.
[table 1]
Description of reference numerals
100 ... ablation probes, 10 ... probe posts, 10A ... front ends reducing diameter part, 11 ... inner chambers (liquid flow path), 12 ... inner chambers (the insert road of pulls wire), 13 ... central lumens, 15 ... rigid bodies (steel wire), 111 ... inclined bores, 112 ... rinse with openings, 20 ... front termination electrodes, 21 ... front end bulges, 22 ... cervical regions, 23 ... cylindrical portions, the guiding groove of 26 ... liquid, 31 ... pull Line, 32 ... pulls wires, 40 ... ring electrodes, 50 ... probe posts, 50A ... front ends reducing diameter part, 51 ... inner chambers (liquid flow path), 511 ... inclined bores, 512 ... are rinsed with opening, 70 ... joysticks, 75 ... swivel plates, the ascending pipe of 80 ... liquid.

Claims (6)

1. a kind of electrode catheter, possesses：
Probe post with the inner chamber as liquid flow path and it is connected and with head with the front of the probe post Front termination electrode,
It is the front end reducing diameter part of taper that above-mentioned probe post has extreme direction undergauge forward, is configured to upwards in the front end reducing diameter part Multiple flushing openings of the surface washing liquid of front termination electrode are stated,
Radial outside inclined side forward end side of the side to the probe post is internally formed in the front end reducing diameter part of above-mentioned probe post To the multiple inclined bores for extending and reaching each above-mentioned flushing opening,
Above-mentioned electrode catheter is characterised by,
The external diameter for making above-mentioned probe post is D1, a diameter of D of the head of above-mentioned front termination electrode2, from the front end of above-mentioned probe post The rear end of reducing diameter part to the front-end edge of above-mentioned flushing opening axis of a cylinder to distance be L1, from the front end of above-mentioned flushing opening Edge to the maximum gauge portion of above-mentioned front termination electrode axis of a cylinder to distance be L2, the inclination angle of the front end reducing diameter part of above-mentioned probe post Spend for β, when the angle of inclination of above-mentioned inclined bore is α,
Formulas I：0.95D2≤D1+2(L2Tan α-L1·tanβ)≤1.05D2Set up,
Also, above-mentioned tilt angle alpha is 5.0～12.5 °, wherein, remove 9.1～9.3 °.
2. electrode catheter according to claim 1, it is characterised in that
Above-mentioned tilt angle alpha is 7.0～8.0 °, 9.4～9.9 ° or 10.5～12.0 °.
3. electrode catheter according to claim 1, it is characterised in that
Above-mentioned tilt angle alpha is 9.4～9.9 ° or 10.5～12.0 °.
4. the electrode catheter according to any one of claims 1 to 3, it is characterised in that
The diameter D of above-mentioned probe post1For 1.0～3.0mm,
It is above-mentioned apart from L1For 1.0～3.0mm,
It is above-mentioned apart from L2For 1.0～2.5mm,
Above-mentioned inclination angle beta is 5.0～30.0 °.
5. a kind of electrode catheter, possesses：
Probe post with the inner chamber as liquid flow path and it is connected and with head with the front of the probe post Front termination electrode,
It is the front end reducing diameter part of taper that above-mentioned probe post has extreme direction undergauge forward, is configured to upwards in the front end reducing diameter part Multiple flushing openings of the surface washing liquid of front termination electrode are stated,
Radial outside inclined side forward end side of the side to the probe post is internally formed in the front end reducing diameter part of above-mentioned probe post To the multiple inclined bores for extending to each above-mentioned flushing opening,
Above-mentioned electrode catheter is characterised by,
Make a diameter of D of the head of above-mentioned front termination electrode2, the above-mentioned front termination electrode of the front-end edge of above-mentioned flushing opening External diameter is D3, from the axis of a cylinder in maximum gauge portion of the front-end edge of above-mentioned flushing opening to above-mentioned front termination electrode to distance be L2, When the angle of inclination of above-mentioned inclined bore is α,
Formula II：0.95D2≤D3+2(L2·tanα)≤1.05D2Set up,
Also, above-mentioned tilt angle alpha is 5.0～12.5 °, wherein, remove 9.1～9.3 °.
6. electrode catheter according to claim 1 or 5, it is characterised in that
Temperature sensor is installed in relatively above-mentioned flushing opening forward side.
CN201380027075.2A 2012-05-30 2013-03-26 Electrode catheter Active CN104363847B (en)

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