CN103987335A - Electrode catheter - Google Patents
Electrode catheter Download PDFInfo
- Publication number
- CN103987335A CN103987335A CN201280060310.1A CN201280060310A CN103987335A CN 103987335 A CN103987335 A CN 103987335A CN 201280060310 A CN201280060310 A CN 201280060310A CN 103987335 A CN103987335 A CN 103987335A
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- China
- Prior art keywords
- pouring member
- electrode
- parts
- catheter
- insulating properties
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Classifications
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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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0133—Tip steering devices
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- 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
- A61B2018/00023—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids closed, i.e. without wound contact by the fluid
-
- 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
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00595—Cauterization
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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
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00773—Sensed parameters
- A61B2018/00791—Temperature
Abstract
An electrode catheter is provided wherein: a catheter shaft (10) having an eccentrically-formed lumen (11) serving as a path for fluid, an irrigation member (20), and a tip electrode (30) are provided; a plurality of irrigation holes (25A) are provided to the irrigation member (20) at equiangular intervals to the irrigation member (20); an eccentric path (23) that connects with the lumen (11) of the shaft (10), a storage space (24) for liquid that connects to the eccentric path (23) and has no partition walls in the peripheral direction, and a plurality of branching paths (25) that connect with the storage space (24), extend in the tip direction while inclining toward the outside, and arrive at each of the irrigation holes (25A) formed on the inner section of the irrigation member (20); the irrigation member (20) comprises a first part (21) and a second part (22); the eccentric path (23) is formed on the inner section of the second part (22); the branching paths (25) are formed on the inner section of the first part (21); and the storage space (24) is formed in the portion where the first part (21) and the second part (22) fit together. This electrode catheter makes it possible to uniformly irrigate the surface of the tip electrode (30) in the peripheral direction using liquid supplied from the lumen of the eccentrically-formed shaft (10).
Description
Technical field
The present invention relates to electrode catheter, more specifically, relate to the front end assembling electrode of conduit, and at this electrode, possess the electrode catheter of the mechanism of perfusion physiological saline and so on liquid.
Background technology
In the ablation catheter as electrode catheter, use and possess for carry out the conduit of cooling filling mechanism to become the front termination electrode of high temperature when burning.
As the conduit in the past that possesses filling mechanism, introduced and will by catheter shaft, be supplied to the conduit (for example, with reference to patent documentation 1 and patent documentation 2) of the normal saline of the inside type that surperficial a plurality of openings of termination electrode spray from being formed at this of front termination electrode.
Yet there is the problem as following (1)～(4) in the known conduit in the past that forms the opening of perfusion use on the surface of front termination electrode.
(1), if opening is set on the surface of front termination electrode, at edge of opening etc., inevitably form sharp edge.And if utilize the front termination electrode that is formed with such sharp edge to burn, the electric current density of sharp edge part becomes high, in this part, cause that abnormal temperature rises, and exists thrombosed probability hastily.
(2) even the surperficial opening of termination electrode sprays normal saline from being formed at, can not pour into fully the surface of front termination electrode (using liquid covering surfaces).Particularly, in the axle of front termination electrode vertically being sprayed to the above-mentioned patent documentation 1 of normal saline and conduit that patent documentation 2 is recorded, can not make normal saline contact fully with the surface of front termination electrode.
(3) by form a plurality of openings at electrode surface, thereby the surface area of front termination electrode cannot be fully guaranteed, effective burn treatment can not be carried out.
(4) in the inside that forms the front termination electrode of ablation catheter, conventionally possess temperature sensor, on one side the temperature of front termination electrode and perienchyma is monitored and controlled, carry out burn treatment on one side.
But, in the conduit that above-mentioned patent documentation 1 and patent documentation 2 are recorded, exist to utilize the inside (stream) that is supplied to front termination electrode normal saline and by front end cooling of electrode to more than required, the supervision of the temperature accurately when the temperature sensor that causes being possessed by the inside of front termination electrode realizes burn treatment and control such problem.Introduced in order to solve such problem, and dispose between the front termination electrode of temperature sensor and catheter shaft, arrange the perfusion that formed by thermal insulation material with parts with prevent from utilizing normal saline by front end cooling of electrode to the technology (with reference to patent documentation 3) more than required.
Patent documentation 1: No. 2562861 communique of Japan Patent
Patent documentation 2: TOHKEMY 2006-239414 communique
Patent documentation 3: Japanese Unexamined Patent Application Publication 2009-537243 communique
The technical task that invention will solve
The leaf springs that use as the deflection mechanism operating for carrying out the front end deflection of conduit more.
This leaf spring in the flexible part of front end of catheter shaft along the central shaft of catheter shaft and configure.By adopting leaf spring as deflection mechanism, give the flexible part of front end enough torsional rigids, as the operability of conduit that can front end deflection operation, improve.
Yet, in the situation that possess the electrode catheter of filling mechanism, adopt the deflection mechanism being formed by leaf spring, in the flexible part of front end of catheter shaft, can not be formed into the inner chamber into the stream of normal saline along central shaft, and must form prejudicially from central shaft.
And the front termination electrode being connected with such catheter shaft or the stream of the normal saline in pouring member also form prejudicially from its central shaft, so normal saline sprays from eccentric opening (outlet of stream).
Like this, exist according to the stream through eccentric, and the normal saline spraying from eccentric opening, and cannot be along front termination electrode circumferentially pour into equably such problem.
For such problem, consider to have the quantity of the injection opening (outlet of stream) that is increased in front termination electrode or pouring member configuration, realize the method for circumferential homogenization.
But, in order to increase the quantity of spraying opening (outlet of stream), need to make the quantity of the stream that forms at front termination electrode or pouring member and then the quantity of the inner chamber that becomes stream that makes to form at catheter shaft increases, be unpractical.
Summary of the invention
The thing of the present invention based on above completes.
The object of the invention is to, provide and cause abnormal temperature rise (high-temperature portion) burning the part of Shi Buhui at front termination electrode, the cooling effect of front end electrode surface and excellent in the thrombotic effect of inhibition of front end electrode surface, can carry out effective burn treatment, and the electrode catheter that the liquid of the inner chamber of the catheter shaft from forming prejudicially circumferentially can be poured into equably to the edge, surface of front termination electrode.
(1) electrode catheter of the present invention is to possess catheter shaft, the insulating properties pouring member being connected with the front of above-mentioned catheter shaft that at least one inner chamber of having the flexible part of front end and becoming liquid flow path forms prejudicially in the flexible part of above-mentioned front end and the front termination electrode being connected with the front of above-mentioned insulating properties pouring member and the electrode catheter that forms
At above-mentioned insulating properties pouring member, along the periphery equal angles compartment of terrain of above-mentioned insulating properties pouring member, dispose a plurality of perfusion openings, described a plurality of perfusions with opening for the liquid of supplying with from above-mentioned catheter shaft is filled into above-mentioned the surface of termination electrode,
The inside of above-mentioned insulating properties pouring member, is formed with:
At least one eccentric stream, it is communicated with the inner chamber that becomes liquid flow path of above-mentioned catheter shaft;
The retention space of liquid, it is the space being communicated with above-mentioned eccentric stream, and does not circumferentially have next door and make liquid circumferentially the distributing equably along above-mentioned insulating properties pouring member from above-mentioned eccentric stream along above-mentioned; And
A plurality of branches stream, they are communicated with above-mentioned retention space, and inclination and forward end direction are extended each that arrives at above-mentioned a plurality of perfusion and use opening laterally,
Above-mentioned insulating properties pouring member consists of the 2nd parts that have the 1st parts of front end shape that can be chimeric with the rear end shape of above-mentioned front termination electrode and have a front end shape that can be chimeric with the rear end shape of above-mentioned the 1st parts,
In the inside of above-mentioned the 2nd parts, be formed with above-mentioned eccentric stream,
In the inside of above-mentioned the 1st parts, be formed with above-mentioned a plurality of branches stream,
Telescoping part at above-mentioned the 1st parts and above-mentioned the 2nd parts is formed with above-mentioned retention space.
(a) according to the electrode catheter of such formation, owing to being formed with perfusion opening at insulating properties pouring member, so without forming opening at front termination electrode, owing to not depositing the sharp edge accompanying with the formation of opening, so produce abnormal temperature and rise burning the part of Shi Buhui at front termination electrode, the formation of thrombosis is suppressed thus.In addition, because without forming opening at front termination electrode, thus can guarantee enough surface areas, and can carry out effective burn treatment.
(b) in addition, due to from insulating properties pouring member to the surperficial perfusion fluid of termination electrode, so can make the liquid of enough amounts and the Surface Contact of front termination electrode, in addition, the base end part of surperficial liquid the past termination electrode of the front termination electrode of perfusion is the Surface runoff along this front termination electrode towards leading section, so the surperficial cooling effect of front termination electrode is excellent, and by near blood front end electrode surface by agitation and dilution fully, play the thrombotic effect of excellent inhibition.
(c), because be formed with along a plurality of perfusion openings of the periphery equal angles arranged spaced of insulating properties pouring member, so can spread all over circumferential whole region, the surface of front termination electrode is poured in addition.
(d) and, by the flexible part of the front end at catheter shaft, become prejudicially the inner chamber of liquid flow path, thus the leaf spring that can not configure in thering is the perfusion cannula in the past of pouring member along the central shaft arrangement of catheter shaft.
(e) and, by the inside at insulating properties pouring member, form eccentric stream, can make the liquid of inner chamber from catheter shaft (liquid flow path forming prejudicially) towards retaining space circulation.
(f) and, by the inside at insulating properties pouring member, form along its circumferential not retention space of the septate liquid of tool, and be communicated with this retention space, tilt laterally and forward end direction is extended and arrived at each a plurality of branches stream of openings for a plurality of perfusions, after thereby the liquid that arrives retention space through eccentric stream circumferentially distributes equably with edge in retaining space, each of a plurality of branches stream extending through forward end direction is sprayed (perfusion) from perfusion with opening, so there is not deviation in the liquid measure of spraying between a plurality of perfusions with equal angles arranged spaced are with opening, can insulating properties pouring member circumferentially on spray uniformly (perfusion), can spread all over circumferential whole region pours into equably to the surface of front termination electrode.
(g) and, by being formed at branch's stream of the inside of insulating properties pouring member, form laterally (outside of the radial direction of insulating properties pouring member), thereby perfusion can be configured in to outside with opening (opening of branch's stream), for example, even if so the surface of the front termination electrode large to size to a certain degree (, having the front termination electrode with the equal above footpath of caliber of catheter shaft) also can be poured into.
(h) and, by making the rear end shape of the 1st parts and the front end shape of the 2nd parts chimeric, insulating properties pouring member is configured, and by making the rear end shape of front termination electrode and the front end shape of the 1st parts chimeric, thereby front termination electrode can be connected with the front of insulating properties pouring member.
In addition, thereby can avoid recessed problem of cutting by forming insulating properties pouring member with two parts, and can obtain the insulating properties pouring member that inside is formed with eccentric stream, retains space and a plurality of branches stream by molding.
(2), in electrode catheter of the present invention, the leading section of preferred above-mentioned insulating properties pouring member is formed with each of above-mentioned a plurality of branches streams continuous, the gathering sill of the liquid extending by each forward end direction of openings from above-mentioned a plurality of perfusions,
The base end part of above-mentioned front termination electrode is formed with the gathering sill with each continuous liquid of the gathering sill of above-mentioned insulating properties pouring member.
According to the electrode catheter of such formation, by the leading section at insulating properties pouring member be formed with a plurality of branches streams each continuously and gathering sill of the liquid that extends of forward end direction, thereby the liquid that can spray with opening from perfusion (arriving the liquid of opening for perfusion through branch's stream) be led (guiding) forward end electrode reliably.
And, by the base end part surface at front termination electrode, be formed with the gathering sill with each continuous liquid of the gathering sill of insulating properties pouring member, the liquid that arrives the base end part of front termination electrode through being formed at the gathering sill of insulating properties pouring member can be led to the leading section of (guiding) forward end electrode, thus, can be by liquid supply to the surface integral of front termination electrode.
(3), in electrode catheter of the present invention, preferred above-mentioned insulating properties pouring member is by being formed at the rear end side recess of above-mentioned the 1st parts and the front minor diameter part of above-mentioned the 2nd parts is chimeric forms,
The degree of depth of the rear end side recess by above-mentioned the 1st parts forms deeplyer than the length of the front minor diameter part of above-mentioned the 2nd parts, thereby forms above-mentioned retention space at the telescoping part of above-mentioned the 1st parts and above-mentioned the 2nd parts.
According to the electrode catheter of such formation, by making the 1st parts and the 2nd parts chimeric, can make is become and retains space by the space of the front end face zoning of the front minor diameter part of the bottom surface (rear end face) of the rear end side recess of the 1st parts and inner peripheral surface and the 2nd parts, can form have the inside that is formed at the 2nd parts eccentric stream, be formed at telescoping part retention space, be formed at the insulating properties pouring member of a plurality of branches stream of the inside of the 1st parts.
(4), in electrode catheter of the present invention, above-mentioned the 1st parts and above-mentioned the 2nd parts that preferably form above-mentioned insulating properties pouring member are the molded bodys that obtain by ceramic injection forming method (CIM).
According to ceramic injection forming method, can form the trickle shape of utilizing resin injection molding not form, molding forms the insulating properties pouring member of electrode catheter of the present invention reliably.
In addition, the ceramic mouldings obtaining by ceramic injection forming method has suitable insulating properties and low-thermal conductivity as the constituent material of pouring member.
(5), in electrode catheter of the present invention, as for making the deflection mechanism of the flexible part deflection of front end of above-mentioned catheter shaft, preferably possesses the leaf spring extending along the central shaft of catheter shaft.
The conduit of the electrode catheter of such formation enough torsional rigid operability excellences for the flexible part of the front end by catheter shaft is endowed.And, according to this electrode catheter, be not subject to become prejudicially along the central shaft arrangement leaf spring of catheter shaft the impact of the inner chamber of liquid flow path, can be to the surface of front termination electrode along its circumferentially perfusion equably.
(6), in electrode catheter of the present invention, the inner chamber that becomes liquid flow path of preferred above-mentioned catheter shaft and the eccentric stream of above-mentioned insulating properties pouring member are communicated with via junction block.
According to the electrode catheter of such formation, the connection of insulating properties pouring member to the front of catheter shaft can be realized reliably, and the leakage (liquid accompanying is with it to the immersion of axle inside) of liquid at the butt position of the front end face (becoming the front end face of the lumen openings of liquid flow path) of catheter shaft and the rear end face (rear end faces of the 2nd parts of eccentric stream opening) of insulating properties pouring member can be prevented.
(7) in electrode catheter of the present invention, being preferably formed in the quantity of the eccentric stream of the inside of above-mentioned insulating properties pouring member is 1 or 2, and the quantity of branch's stream is more than 4.
The quantity of eccentric stream that is formed at the inside of insulating properties pouring member be 1 or 2 situation (, the quantity of the inner chamber that becomes liquid flow path of catheter shaft is 1 or 2 situation) under, particularly effective at the front installing insulating pouring member (making the liquid of supplying with from catheter shaft in the inside of insulating properties pouring member (eccentric stream, retention space, a plurality of branches stream) circulation) of catheter shaft.
In addition, as long as the quantity of branch's stream (quantity of opening for perfusion) is more than 4, can be along the circumferentially perfusion sufficiently uniformly of insulating properties pouring member.
(8) in electrode catheter of the present invention, preferably, at above-mentioned insulating properties pouring member, along its central shaft, be formed with central through hole, and insert and be connected with central canal at above-mentioned central through hole,
The retention space of aforesaid liquid is by the space envelope of the inner peripheral surface of rear end side recess of above-mentioned the 1st parts and the separation of the outer peripheral face of above-mentioned central canal.
According to the electrode catheter of such formation, by making the 1st parts and the 2nd parts chimeric, thereby can make by the inner peripheral surface of rear end side recess of the front end face of the front minor diameter part of the bottom surface (rear end face) of the rear end side recess of the 1st parts, the 2nd parts, the 1st parts,, becoming, the space envelope of the outer peripheral face zoning of central canal retains space.
(9) in this case, preferably above-mentioned central canal insert be connected with before the wire of termination electrode and/or the wire of temperature sensor.
According to the electrode catheter of such formation, the wire that can prevent from being reliably inserted through in central canal contacts this situation with liquid.
(10) in electrode catheter of the present invention, preferably the front end of above-mentioned front termination electrode bloats, and the maximum diameter of this front termination electrode is being made as to D1, and when the caliber of above-mentioned catheter shaft is made as D2, the value of D1/D2 is more than 1.0.
According to the electrode catheter of such formation, can guarantee enough surface areas that burn treatment is required at front termination electrode.
According to electrode catheter of the present invention, produce abnormal temperature and rise burning the part of Shi Buhui at front termination electrode, the cooling effect of front end electrode surface and excellent in the thrombotic effect of inhibition of front end electrode surface, can carry out effective burn treatment.
According to electrode catheter of the present invention, can also be by the liquid of the inner chamber of the catheter shaft from forming prejudicially to the circumferentially perfusion equably of the edge, surface of front termination electrode.And, by the flexible part of the front end at catheter shaft, form prejudicially the inner chamber that becomes liquid flow path, can there is along the central shaft arrangement of catheter shaft the leaf spring that can not configure in the perfusion cannula in the past of pouring member.
In addition, owing to forming insulating properties pouring member by the 1st parts and the 2nd parts, so the recessed problem of cutting in the time of can avoiding processing and forming, can obtain the insulating properties pouring member that inside is formed with eccentric stream, retains space and a plurality of branches stream by molding.
Accompanying drawing explanation
Fig. 1 is the front view of ablation catheter of an embodiment of electrode catheter of the present invention.
Fig. 2 is the longitudinal section of the fore-end of the ablation catheter shown in Fig. 1.
Fig. 3 is the sectional elevation (the C-C cutaway view of Fig. 2 (Fig. 7)) of the fore-end of the ablation catheter shown in Fig. 1.
Fig. 4 is the sectional elevation (Fig. 2 (Fig. 7) B-B cutaway view) of the fore-end of the ablation catheter shown in Fig. 1.
Fig. 5 is the sectional elevation (the D-D cutaway view of Fig. 2 (Fig. 7)) of the fore-end of the ablation catheter shown in Fig. 1.
Fig. 6 is the sectional elevation (the A-A cutaway view of Fig. 2 (Fig. 7)) of the fore-end of the ablation catheter shown in Fig. 1.
Fig. 7 is the longitudinal section (the F-F cutaway view of Fig. 3) of the fore-end of the ablation catheter shown in Fig. 1.
Fig. 8 means the axonometric chart of the pouring member of the ablation catheter shown in pie graph 1.
Fig. 9 means the axonometric chart of the pouring member of the ablation catheter shown in pie graph 1.
Figure 10 is the longitudinal section (the G-G cutaway view of Fig. 4) of the fore-end of the ablation catheter shown in Fig. 1.
Figure 11 is the sectional elevation (the H-H cutaway view of Figure 10) of the fore-end of the ablation catheter shown in Fig. 1.
Figure 12 is the sectional elevation (the I-I cutaway view of Figure 10) of the fore-end of the ablation catheter shown in Fig. 1.
Figure 13 is the sectional elevation (the J-J cutaway view of Figure 10) of the fore-end of the ablation catheter shown in Fig. 1.
The specific embodiment
Below, use accompanying drawing to describe an embodiment of electrode catheter of the present invention.
Electrode catheter shown in Fig. 1 to Fig. 7 and Figure 10 to Figure 13 is the ablation catheter of the present invention for the treatment of the arrhythmia of heart.
The ablation catheter 100 of this embodiment possesses: catheter shaft 10, and it has the flexible part 10A of front end, and is formed with prejudicially at the flexible part 10A of this front end 2 inner chambers 11,11 that become liquid flow path; The pouring member 20 of insulating properties, it is connected the front of this catheter shaft 10; The front termination electrode 30 of front, it is connected to this pouring member 20; Ring electrode 40, it is assembled in the outer peripheral face of catheter shaft 10; Pull metal wire 61,62, they are configured for making the deflection mechanism of the flexible part 10A deflection of front end of catheter shaft 10; Leaf spring 65, its central shaft along catheter shaft 10 and configuring, and form deflection mechanism together with pulling metal wire 61,62; Joystick 70, it is connected the base end side of catheter shaft 10; And the ascending pipe 80 of liquid;
The flexible part 10A of front end at catheter shaft 10,2 inner chambers 11,11 that become liquid flow path clip central shaft and opposed (, respectively from eccentricity of central axis) form, and be formed with 2 inner chambers 13,13 of the slotting path of the wire that becomes 2 inner chambers 12,12 of the slotting path that pulls metal wire 61,62 and become ring electrode 40;
At pouring member 20, along the periphery of pouring member 20, with equal angles interval (45 ° of intervals), be configured for 8 perfusion opening 25A of the jet surface (perfusion) of the liquid forward end electrode 30 of supplying with from catheter shaft 10;
Inside at pouring member 20, form the inner chamber that becomes liquid flow path 11 with catheter shaft 10, 11 2 eccentric streams 23 that are communicated with, 23, with eccentric stream 23, 23 spaces that are communicated with, and circumferentially do not there is next door so that from eccentric stream 23, 23 liquid is along the retention space 24 of the liquid circumferentially distributing equably of pouring member 20, and be communicated with this retention space 24, tilt laterally and forward end direction is extended and arrived at each 8 branch's streams 25 of opening 25A for 8 perfusions, leading section at pouring member 20, form with each of 8 branch's streams 25 continuous, and the gathering sill 26 of the liquid extending by each forward end direction of opening 25A from perfusion,
At the base end part surface formation of front termination electrode 30 and the gathering sill 36 of each continuous liquid of the gathering sill 26 of pouring member 20;
Pouring member 20 is by by first component 21 with second component 22 is chimeric forms, described first component 21 is formed with front recess 21A that can be chimeric with the cylindric part 33 of front termination electrode 30, and be also formed with recess 21B in rear end side, and in inside, be formed with 8 branch's streams 25, described second component 22 has front minor diameter part 221 that can be chimeric with the rear end side recess 21B of this first component 21, and in inside, is formed with 2 eccentric streams 23,23;
By by the degree of depth (d of the rear end side recess 21B of first component 21
21) form than the length (d of the front minor diameter part 221 of second component 22
22) dark, and form retention space 24 (space of being divided by the front end face 22a of the front minor diameter part 221 of bottom surface (rear end face) 21b of the rear end side recess 21B of first component 21 and inner peripheral surface and second component 22) at the telescoping part of first component 21 and second component 22.
As shown in Figure 1, ablation catheter 100 possesses the ascending pipe 80 of catheter shaft 10, pouring member 20, front termination electrode 30, ring electrode 40, joystick 70 and the liquid with the flexible part 10A of front end.
Ascending pipe 80 shown in Fig. 1 is connected with catheter shaft 10 through the inside of joystick 70, through inner chamber 11 feed fluids of these ascending pipe 80 guide tubular axis 10.Here, as " liquid ", can illustration normal saline.
Joystick 70 shown in Fig. 1 is connected the base end side of catheter shaft 10, possesses for carrying out the swivel plate 75 of the front end deflection operation of conduit.
The catheter shaft 10 that forms ablation catheter 100 is the parts with the flexible part 10A of front end.
Here, " the flexible part of front end " refer to can be by pulling the metal wire of front end deflection operation use the fore-end of the catheter shaft of deflection (bending).
As shown in FIG. 2 and 3, at catheter shaft 10 (inner chamber 12,12), be configured for the pulling metal wire 61,62 that makes the flexible part 10A of front end (carrying out front end deflection operation) deflection.The rearward end that pulls metal wire 61,62 is linked to respectively the swivel plate 75 (with reference to Fig. 1) of joystick 70.On the other hand, the leading section of pulling metal wire 61,62 is fixed on the outer peripheral face (accommodating groove 226) of pouring member 20 (second component 22).
For example, if make swivel plate 75 to the A1 direction rotation shown in Fig. 1, pulling metal wire 61 is pulled, the flexible part 10A of front end of catheter shaft 10 carries out deflection action to arrow A direction, if make swivel plate 75 to the B1 direction rotation shown in Fig. 1, pull metal wire 62 and pulled, the flexible part 10A of front end of catheter shaft 10 carries out deflection action to arrow B direction.
As shown in Figure 3, at the flexible part 10A of front end of catheter shaft 10, in the vertical plane of the orientation (the deflection direction of the flexible part 10A of front end) with pulling metal wire 61,62, along the central shaft arrangement of catheter shaft 10, there is leaf spring 65.
By at the flexible part 10A configuration of front end leaf spring 65, can guarantee the anisotropy of deflection direction, and give the enough torsional rigids of the flexible part 10A of front end, the raising of the operability while realizing front end deflection operation.
As shown in Fig. 3 and Fig. 7, at the flexible part 10A of front end of catheter shaft 10, across the central shaft of catheter shaft 10, be formed with opposed to each other 2 inner chambers 11,11 that become liquid flow path.
In addition, 2 inner chambers 11,11 in the flexible part 10A of front end also can collaborate at the shaft portion of base end side by the flexible part 10A of front end.
In addition, as shown in Figure 3, at the flexible part 10A of front end, be formed with the slotting path of the wire (omitting diagram in Fig. 3) that becomes 2 inner chambers 12,12 of the slotting path that pulls metal wire 61,62, becomes ring electrode 40 inner chamber 13,13, become front termination electrode 30 wire 30L slotting path inner chamber 14, become the inner chamber 15 of slotting path of the wire 35L of temperature sensor (thermocouple).Like this, the flexible part 10A of the front end of catheter shaft 10 is so-called many inner chamber structures.Wherein, for the engaging of pouring member 20 described later, the front end of catheter shaft 10 is formed with the front recess of single inner chamber structure.
Catheter shaft 10 consists of synthetic resin such as polyolefin, polyamide, polyethers polyamide, polyurethane, nylon, PEBAX (polyether block amide).In addition, the peri position of catheter shaft 10 is distolateral can be also that the effective rustless steel element line that these synthetic resin are formed is organized into groups the blade tube forming.
Preferably the external diameter of catheter shaft 10 is 1.0～3.0mm, and more preferably 1.6～2.7mm, if show a preferred example, is 2.36mm.
Preferably the length of catheter shaft 10 is 600～1500mm, more preferably 900～1200mm.
In ablation catheter 100, the surperficial injection (perfusion) of liquid forward end electrode 30 is undertaken by the pouring member 20 that is positioned at the rear end side of front termination electrode 30.
Fig. 8 and Fig. 9 mean the axonometric chart of the shape of the pouring member 20 that forms ablation catheter 100.
As shown in Fig. 2 and Fig. 7 to Figure 10, pouring member 20 is by by first component 21 with second component 22 is chimeric forms.
The second component 22 that forms pouring member 20 consists of the molded body that straight stem portion 223 and the external diameter front minor diameter part 221 less than this straight stem portion 223 are formed.
In addition, in Fig. 8 and Fig. 9, because being entrenched in the inner side (rear end side recess 21B) of first component 21, the front minor diameter part 221 of second component 22 is not embodied on figure.
Preferably the external diameter of the straight stem portion 223 of second component 22 is 0.80～2.80mm, and more preferably 1.80～2.12mm, if a preferred example is shown, is 1.96mm.
Preferably the external diameter of the front minor diameter part 221 of second component 22 is 0.60～2.60mm, and more preferably 0.40～1.70mm, if a preferred example is shown, is 1.45mm.
As shown in Fig. 4, Fig. 5, Fig. 7 and Fig. 9, at second component 22, along its central shaft, form central through hole 224, and in the both sides of central through hole 224, form the eccentric stream 23,23 extending with central axes ground.Central authorities' through hole 224 and eccentric stream the 23, the 23rd, arrive to the through hole of the rear end face 22b of second component 22 (straight stem portion 223) from the front end face 22a of second component 22 (front minor diameter part 221).
As shown in Figure 7, it is opposed that the front stream of the front end face (the C-C section of the Fig. 2 shown in Fig. 3) of each and catheter shaft 10 of the opening of the eccentric stream 23,23 of the rear end face 22b of second component 22 (the B-B section of the Fig. 2 shown in Fig. 4) forms each of opening of inner chamber 11,11.
The eccentric stream 23,23 of the inner chamber 11,11 of catheter shaft 10 and pouring member 20 (second component 22) is communicated with via junction block 51,51.
Thus, can make the connection of catheter shaft 10 and pouring member 20 reliable, and can prevent the leakage of liquid at butt position of the rear end face 22b (opening surface of eccentric stream 23,23) of the front end face (opening surface of inner chamber 11,11) of catheter shaft 10 and the rear end face of pouring member 20, and then can prevent that the liquid that accompanies is with it to the immersion of axle inside.
As shown in Figure 7, the cross section shape of the eccentric stream 23,23 that second component 22 (straight stem portion 223 and front minor diameter part 221) is connected soon arrive at from the inside of straight stem portion 223 inside to front minor diameter part 221 tight the end difference of 231 expressions (in the Fig. 7 with), from circle, be changed to roughly semicircle.Therefore, although the opening shape of the eccentric stream 23,23 of the rear end face 22b of second component 22 (the B-B section of the Fig. 2 shown in Fig. 4) is circular, the opening shape of the eccentric stream 23,23 of the front end face 22a of second component 22 (the D-D section of the Fig. 2 shown in Fig. 5) is for roughly semicircle.
By making like this cross section shape of eccentric stream 23,23 change, can guarantee the wall thickness (for example, wall thickness more than 60 μ m) at the moulding material of the eccentric stream 23,23 of front minor diameter part 221 zonings.
In addition, as shown in Fig. 2, Fig. 8 and Fig. 9, in the outer peripheral face formation of second component 22 (straight stem portion 223), take in and fix the accommodating groove 226,226 of the leading section that pulls metal wire 61,62.
In addition, as shown in Fig. 8 to Figure 10 and Figure 13, the outer peripheral face in second component 22 (straight stem portion 223), forms accommodating groove 225 in order to take in the wire 40L of ring electrode 40 (first and second ring electrode from front end).
As shown in figure 10, accommodating groove 225 consists of the 225a of shallow slot portion, rake 225b, the 225c of deep trouth portion towards rear end from front end.
Here, preferably the width of accommodating groove 225 is 0.15～0.35mm, if a preferred example is shown, is 0.26mm.
Preferably the degree of depth of the 225a of shallow slot portion of accommodating groove 225 is 0.10～0.20mm, if a preferred example is shown, is 0.12mm.
In addition, preferably the degree of depth of the 225c of deep trouth portion of accommodating groove 225 is 0.15～0.65mm, if a preferred example is shown, is 0.50mm.
The first component 21 that forms pouring member 20 is by straight stem portion 213, external diameter are formed than the large large-diameter portion 212 of this straight stem portion 213 and towards the molded body that the reducing diameter part 211 of front extreme direction undergauge forms.
The external diameter of the straight stem portion 213 of first component 21 is identical in fact with the external diameter of the straight stem portion 223 of second component 22, and the external diameter of large-diameter portion 212 is identical in fact with the external diameter of catheter shaft 10.The minimum outer diameter of the reducing diameter part 211 of first component 21 is identical in fact with the external diameter of the cervical region 32 of front termination electrode 30.
As shown in Fig. 2, Fig. 7 and Figure 10, front recess 21A that can be chimeric with the rear end part (cylindric part 33) of front termination electrode 30 in the front formation of first component 21.In addition, rear end side recess 21B that can be chimeric with the front minor diameter part 221 of second component 22 in the rear end side formation of first component 21.
Here, the degree of depth of the rear end side recess 21B of first component 21 (is used d in Fig. 7
21represent) form than the length of the front minor diameter part 221 of second component 22 and (in Fig. 7, use d
22represent) dark.
As shown in Figure 7 and Figure 8, at first component 21 (reducing diameter part 211), along the periphery of pouring member 20, with equal angles interval (45 ° of intervals), be configured for 8 perfusion opening 25A of the jet surface (perfusion) of the liquid forward end electrode 30 of supplying with from catheter shaft 10.
In addition, in the inside of first component 21, form to tilt laterally from bottom surface (rear end face) 21b of rear end side recess 21B, and 8 the branch's streams 25 (through hole) that pour into by each of opening 25A are arrived in the extension of forward end direction.
In addition, as shown in Figure 6, the opening of branch's stream 25 of bottom surface (rear end face) 21b of rear end side recess 21B is circumferentially configuring with equal angles interval (45 ° of intervals) along pouring member 20 also.
Article 8, each (outside of the radial direction of pouring member 20) axially laterally forming with respect to pouring member 20 of branch's stream 25 tilts.
Thus, even if the surface of the front termination electrode large with respect to size to a certain degree also can be poured into fully.
Here, as the angle of inclination of branch's stream 25, be preferably 3～45 °, more preferably 5～13 °, if a preferred example is shown, be 7 °.
In addition, at the leading section (reducing diameter part 211) of first component 21, form with each of 8 branch's streams 25 continuous, and the gathering sill 26 of the liquid extending by each forward end direction of opening 25A from perfusion.
In addition, although the gathering sill 26 of 8 branch's streams 25, perfusion opening 25A, liquid is respectively set with 45 ° of intervals along the periphery of pouring member 20 respectively at pouring member 20 (first component 21), but in representing the Fig. 7 in vertical section, can only see a part wherein.
As shown in Fig. 2, Fig. 6, Fig. 7 and Figure 10, at first component 21, central shaft along first component 21 forms central through hole 214, and this central authorities' through hole 214 arrives at the bottom surface (front end face 21a) of front recess 21A from bottom surface (rear end face) 21b of rear end side recess 21B.
By the central through hole 214 of first component 21 and the central through hole 224 of second component 22, formed the central through hole of pouring member 20.
As shown in Fig. 2, Fig. 4 to Fig. 7 and Figure 10 to Figure 13, central canal 54 are inserted through the central through hole (214,224) to pouring member 20.The inside of these central canal 54 insert logical before the wire 30L of termination electrode 30 and the wire 35L of temperature sensor.
As shown in Fig. 8 to Figure 12, at the outer peripheral face of first component 21 (straight stem portion 213), along the periphery of straight stem portion 213, with equal angles interval (90 ° of intervals) configuration formation, can take in 4 accommodating grooves 215 of the wire 40L of ring electrode 40 (first ring electrode of terminal number in the past).
Here, preferably the width of accommodating groove 215 is 0.12～0.50mm, if a preferred example is shown, is 0.34mm.
In addition, preferably the degree of depth of accommodating groove 215 is 0.10～0.20mm, if a preferred example is shown, is 0.12mm.
Be formed in 4 accommodating grooves 215 of outer peripheral face of first component 21 (straight stem portion 213) 1 and be configured on the straight line identical with the accommodating groove 225 of outer peripheral face that is formed at second component 22 (straight stem portion 223), in the accommodating groove 225 of this accommodating groove 215 and second component 22, take in the wire 40L of ring electrode 40.
As shown in figure 10, in the past the wire 40L of first ring electrode 40 of terminal number is through accommodating groove 215 and accommodating groove 225 (225a of shallow slot portion, rake 225b, the 225c of deep trouth portion), be directed to the opening of the inner chamber 13 of catheter shaft 10, from this opening, enter inner chamber 13, through the inner chamber 13 of catheter shaft 10 and the inside of joystick 70, and be connected the inside of joystick 70 or the adapter of its base end side (omitting diagram) and be connected.In addition, from front end, the wire 40L of second ring electrode 40, through accommodating groove 225 (the shallow slot deep trouth 225c of portion), is directed to the opening of the inner chamber 13 of catheter shaft 10.
The accommodating groove (accommodating groove 215 in the first component 21 and accommodating groove 225 in second component 22) that outer peripheral face by pouring member 20 forms wire 40L afterwards, can be assemblied in ring electrode 40 outer peripheral face (region) that pouring member is positioned at inner catheter shaft 10.
Thus, can shorten front termination electrode 30 and from front end first ring electrode 40 leave distance (for example, be about 2mm), between these electrodes, can carry out desirable potential measurement.
The first component 21 of formation pouring member 20 and second component 22 consist of the molded body of insulative resin or insulating ceramics.
Preferably first component 21 and second component 22 consist of the molded body obtaining by ceramic injection forming method (CM).
Utilize ceramic injection forming method, according to the injection molding difference based on resin, for example, even the trickle shape that can not form (, having the trickle shape of the wall thickness of 60 about μ m) also can form, so the pouring member 20 of molding shape as described above, size reliably.
In addition, the ceramic mouldings obtaining by ceramic injection forming method, as the constituent material of pouring member, has suitable low-thermal conductivity.
In addition, the ceramic mouldings insulating properties obtaining by ceramic injection forming method is excellent, even form sharp edge at the pouring member 20 consisting of this molded body, when using ablation catheter 100 (burning), also not existing electric current to concentrate on sharp edge partly becomes the situation of high temperature.
As the preferably ceramic material that forms pouring member 20, excellent from processing and forming, and the excellent such viewpoint of biocompatibility sets out, and preferably uses zirconium oxide.
Pouring member 20 is by being formed at the rear end side recess 21B of first component 21 and the front minor diameter part 221 of second component 22 is chimeric forms.
At the telescoping part of this pouring member 20, bottom surface (rear end face) 21b of the rear end side recess 21B of first component 21 and the front end face 22a of second component 22 are with d
21-d
22distance devices spaced apart, betwixt, zoning forms the space envelope (jacket space) of being separated by the outer peripheral face of the inner peripheral surface of rear end side recess 21B and central canal 54, this space envelope becomes the retention space 24 of liquid.
The retention space 24 forming is like this for making the liquid interflow from eccentric stream 23,23, and in the space circumferentially distributing equably of pouring member 20.Owing to there is no circumferential next door in this retention space 24, so can make the liquid that flow into retention space 24 along circumferentially freely flowing.
Here, as the length (d that retains space 24
21-d
22) be preferably 0.15～0.65mm, if a preferred example is shown, be 0.30mm.
The pouring member 20 forming as described above has: the mode being communicated with the inner chamber 11,11 with becoming the catheter shaft 10 of liquid flow path is formed at 2 eccentric streams 23,23 of the inside of second component 21; It is the space being communicated with eccentric stream 23,23, and be formed at first component 21 and second component 22 telescoping part in week, upwards there is no next door, make the retention space 24 along the liquid circumferentially distributing equably of pouring member 20 from the liquid of eccentric stream 23,23; Be communicated with this retention space 24, tilt laterally and forward end direction extend arrive at perfusion with opening 25A each be formed at 8 branch's streams 25 of the inside of first component; And continuous with each of 8 branch's streams 25, and be formed extended at both sides in the gathering sill 26 of the liquid of leading section (reducing diameter part 211 of first component) by each forward end direction of opening 25A from perfusion.
As shown in Figure 7, the straight stem portion 213 of the first component 21 of formation pouring member 20 and second component 22 (front minor diameter part 221, straight stem portion 223) are inserted into the front recess of (chimeric) catheter shaft 10, each of the eccentric stream 23,23 of pouring member 20 is communicated with via each of the inner chamber 11,11 of junction block 51,51 and catheter shaft, thus, pouring member 20 is connected the front of catheter shaft 10.
Thus, only the reducing diameter part 211 of first component 21 and large-diameter portion 212 present as the face shaping of pouring member 20.
On the other hand, by the cylindric part 33 of the chimeric front termination electrode 30 of front recess 21A at pouring member 20 (first component 21), thereby front termination electrode 30 is connected the front of pouring member 20.
Be connected the front of pouring member 20, and the front termination electrode 30 that forms ablation catheter 100 have hemispheric front end bellying 31, cervical region 32 and cylindric part 33.
Footpath as the front end bellying 31 of front termination electrode 30, is preferably 1.0～3.3mm, and more preferably 2.2～2.6mm, is especially preferably 2.3～2.5mm, if a preferred example is shown, is 2.36mm.
In addition, the footpath of front end bellying 31 (maximum diameter of front termination electrode 30) is being made as to D1, when the caliber of catheter shaft 10 is made as D2, preferably the value of D1/D2 is more than 1.0, more preferably 1.0～1.5, if a preferred example is shown, be 1.0 (D1/D2=2.36mm/2.36mm).
In the situation that the value of D1/D2 is too small, be difficult to utilize the conduit that possesses so front termination electrode to carry out effective burn treatment.
On the other hand, in the situation that the value of D1/D2 is excessive, be difficult to the liquid to the surface perfusion q.s of so front termination electrode.
In addition, can at the liquid of the surface of more than 1.0 front termination electrodes 30 perfusion q.s, be due to by branch's stream 25 of pouring member 20 is tilted laterally to the value of D1/D2, compare with the situation that does not make it to tilt, make perfusion be positioned at outside with opening 25A.In this, also there is the meaning that clamps pouring member 20.
In addition, at base end part (cervical region 32) formation of front termination electrode 30 and the gathering sill 36 of each continuous liquid of the gathering sill 26 of pouring member 20.
By forming this gathering sill 36, can be by the leading section of the front termination electrode 30 of guiding fluid (guiding) of the base end part of termination electrode 30 before arriving through being formed at the gathering sill 26 of pouring member 20, thus, can be to the surface integral feed fluid that comprises the front termination electrode 30 of front end bellying 31.
In addition, because be formed at the gathering sill 36 of front termination electrode 30, there is mild R shape, so, even when burning, in this part, can there is not abnormal temperature yet and rise.
According to the ablation catheter 100 of this embodiment, because perfusion is formed at the pouring member 20 of insulating properties with opening 25A, there is not sharp edge in the front termination electrode 30 in electric conductivity, so when using ablation catheter 100 (burning inch), can not produce in the part of front termination electrode 30 abnormal temperature (high-temperature portion) this situation that rises, can suppress blood and contact with such high-temperature portion and form this situation of thrombosis.And, because without forming opening at front termination electrode 30, so can guarantee in order to burn enough surface areas, can carry out effective burn treatment.
In addition, according to the ablation catheter 100 of this embodiment, due to from be disposed at pouring member 20 leading section 8 perfusions with opening 25A to jet surface (perfusion) liquid of termination electrode 30, so can make the liquid of q.s and the Surface Contact of front termination electrode 30.
And the base end part (cervical region 32) of liquid the past termination electrode 30 of the jet surface of forward end electrode 30 is the Surface runoff along front termination electrode 30 towards leading section (front end bellying 31).
Therefore, this ablation catheter 100 with at front termination electrode, form perfusion and compare with the known conduit in the past of opening, the surperficial cooling effect of front termination electrode 30 is excellent, and by by the blood of the periphery of front termination electrode 30 agitation and dilution fully, plays the thrombotic effect of more excellent inhibition.
In addition, due to 8 perfusions with opening 25A along the periphery of pouring member 20 with equal angles (45 °) arranged spaced, so can spread all over circumferential whole region (360 °), the surface of front termination electrode 30 is poured into.
And, in the flexible part 10A of the front end at catheter shaft 10, become 2 inner chambers 11,11 of liquid flow path, 2 inner chambers 12,12 that become the slotting path that pulls metal wire 61,62,2 inner chambers 13,13 of slotting path that become the wire of ring electrode 40 and be all formed on eccentric position, thus can be by the leaf spring 65 that can not configure in thering is the perfusion cannula in the past of pouring member along central shaft arrangement the flexible part 10A of front end at catheter shaft 10.
And, configured the ablation catheter 100 of the leaf spring 65 torsional rigid operability enough because the flexible part 10A of the front end at catheter shaft 10 has been endowed excellent.
And, by the inside at pouring member 20, be formed on circumferentially the not retention space 24 of the septate liquid of tool, and be communicated with retention space, 8 branch's streams 25 that pour into by each of opening 25A are arrived in inclination laterally and the extension of forward end direction, thereby through eccentric stream 23, 23 liquid that also arrive retention space 24 to be adjusted and to flow along the circumferential mode distributing equably in retaining space 24, through each of 8 branch's streams 25, from opening 25A injected (perfusion) for perfusion, therefore be not subject to the amount of the liquid from catheter shaft 10 to pouring member 20 supplies to exist circumferential deviation (owing to being disposed at the leaf spring 65 of the flexible part 10A of front end, become 2 inner chambers 11 of liquid flow path, the 11 circumferential deviations that formation causes prejudicially) impact, the liquid measure that can spray between 8 perfusions with equal angles (45 °) arranged spaced are with opening 25A does not have deviation in circumferentially the spraying uniformly of pouring member 20 (perfusion), can spread all over circumferential whole region (360 °) pours into equably to the surface of front termination electrode 30.
And, by making to be formed at the rear end side recess 21B (the rear end shape of first component) of first component 21 and the front minor diameter part 221 (the front end shape of second component) of second component 22 is chimeric, form pouring member 20, by making the cylindric part 33 (the rear end shape of front termination electrode) of front termination electrode 30 and the front recess 21A (the front end shape of first component) of first component 21 chimeric, front termination electrode 30 can be connected to the front of pouring member 20.
Like this, by forming pouring member 20 by two parts, can avoid the recessed problem of cutting causing because retaining the shape in space 24, the pouring member 20 that can obtain being formed with eccentric stream 23,23 in inside, retain space 24 and 8 branch's streams 25 by molding.
And, because being formed at each of branch's stream 25 of the inside of pouring member 20 (first component 11) forms laterally, even if so the surface to the large front termination electrode (the front termination electrode 30 that the value of D1/D2 is 1.0) of size to a certain degree also can be poured into fully.
And, gathering sill 26 by the leading section formation at pouring member 20 (first component 11) with each liquid that also forward end direction is extended continuously of branch's stream 25, can lead (guiding) forward end electrode 30 reliably from pouring into the liquid that opening 25A sprays.
And, by the base end part surface at front termination electrode 30, the gathering sill 36 of each continuous liquid of the gathering sill 26 of formation and pouring member 20, can by through being formed at the gathering sill 26 of pouring member 20 and arrive before the leading section of termination electrode 30 before the guiding fluid of base end part of termination electrode 30, surface integral feed fluid that thus can forward end electrode 30.
Above one embodiment of the present invention is illustrated, but the present invention is not limited to these, can carries out various changes.
For example, the quantity of the branch's stream in pouring member (perfusion opening) can not be also 8, for example, can suitably select in 4～12 scope.
In addition, the quantity of the inner chamber that becomes liquid flow path of catheter shaft (quantity of the eccentric stream in pouring member) can not be also 2, can be more than 1 or 3.But in the situation that use becomes the few catheter shaft of quantity of the inner chamber of liquid flow path, the present invention is more effective.
In addition, with regard to the internal structure of catheter shaft, so long as become the inner chamber of liquid flow path, in the flexible part of front end, form prejudicially, be not particularly limited.
In addition, the shape of front termination electrode is not specially limited, and can be shell shape etc. yet.
Description of reference numerals
100 ... ablation catheter; 10 ... catheter shaft; 10A ... the flexible part of front end; 11 ... inner chamber (stream of liquid); 12 ... inner chamber (pulling the slotting path of metal wire); 13 ... inner chamber (the slotting path of wire); 20 ... pouring member; 21 ... the 1st parts; 211 ... reducing diameter part; 212 ... large-diameter portion; 213 ... straight stem portion; 214 ... central authorities' through hole; 215 ... the accommodating groove of wire; 21A ... front recess; 21a ... the bottom surface (front end face) of front recess 21A; 21B ... rear end side recess; 21b ... the bottom surface (rear end face) of rear end side recess 21B; 22 ... the 2nd parts; 221 ... front minor diameter part; 223 ... straight stem portion; 224 ... central authorities' through hole; 225 ... the accommodating groove of wire; 226 ... pull the accommodating groove of the leading section of metal wire; 22a ... the front end face of front minor diameter part; 23 ... eccentric stream; 231 ... end difference; 24 ... the retention space of liquid; 25 ... branch's stream; 25A ... perfusion opening; 26 ... the gathering sill of liquid; 30 ... front termination electrode; 30L ... the wire of front termination electrode; 31 ... front end bellying; 32 ... cervical region; 33 ... cylindric part; 35L ... the wire of temperature sensor; 36 ... the gathering sill of liquid; 40 ... ring electrode; 40L ... the wire of ring electrode; 51 ... junction block; 54 ... central canal; 61 ... pull metal wire; 62 ... pull metal wire; 65 ... leaf spring; 70 ... joystick; 75 ... swivel plate; 80 ... the ascending pipe of liquid.
Claims (10)
1. an electrode catheter, to possess catheter shaft, the insulating properties pouring member being connected with the front of described catheter shaft that at least one inner chamber of having the flexible part of front end and becoming liquid flow path forms prejudicially in the flexible part of described front end and the front termination electrode being connected with the front of described insulating properties pouring member and the electrode catheter that forms, it is characterized in that
At described insulating properties pouring member, along the periphery equal angles compartment of terrain of described insulating properties pouring member, dispose a plurality of perfusion openings, described a plurality of perfusions with opening for the liquid of supplying with from described catheter shaft is filled into described the surface of termination electrode,
Inside at described insulating properties pouring member, is formed with:
At least one eccentric stream, it is communicated with the inner chamber that becomes liquid flow path of described catheter shaft;
The retention space of liquid, it is the space being communicated with described eccentric stream, and does not circumferentially have next door so that from liquid circumferentially the distributing equably along described insulating properties pouring member of described eccentric stream along described; And
A plurality of branches stream, they are communicated with described retention space, and inclination and forward end direction are extended each that arrives at described a plurality of perfusion and use opening laterally,
Described insulating properties pouring member consists of the 2nd parts that have the 1st parts of front end shape that can be chimeric with the rear end shape of described front termination electrode and have a front end shape that can be chimeric with the rear end shape of described the 1st parts,
The inside of described the 2nd parts is formed with described eccentric stream,
The inside of described the 1st parts is formed with described a plurality of branches stream,
Telescoping part at described the 1st parts and described the 2nd parts is formed with described retention space.
2. electrode catheter according to claim 1, is characterized in that,
At the leading section of described insulating properties pouring member, be formed with the gathering sill of liquid, each of the gathering sill of described liquid and described a plurality of branches stream is continuous, from described a plurality of perfusions, by each forward end direction of openings, extend,
At the base end part of described front termination electrode, be formed with the gathering sill with each continuous liquid of the gathering sill of described insulating properties pouring member.
3. according to the electrode catheter described in claim 1 or 2, it is characterized in that,
Described insulating properties pouring member is by being formed at the rear end side recess of described the 1st parts and the front minor diameter part of described the 2nd parts is chimeric forms,
The degree of depth of the rear end side recess by described the 1st parts forms deeplyer than the length of the front minor diameter part of described the 2nd parts, thereby forms described retention space at the telescoping part of described the 1st parts and described the 2nd parts.
4. according to the electrode catheter described in any one in claim 1～3, it is characterized in that,
Described the 1st parts and described the 2nd parts that form described insulating properties pouring member are the molded bodys that obtain by ceramic injection forming method that is CIM method.
5. according to the electrode catheter described in any one in claim 1～4, it is characterized in that,
As for making the deflection mechanism of the flexible part deflection of front end of described catheter shaft, possesses the leaf spring extending along the central shaft of catheter shaft.
6. according to the electrode catheter described in any one in claim 1～5, it is characterized in that,
The inner chamber that becomes liquid flow path of described catheter shaft and the eccentric stream of described insulating properties pouring member are communicated with via junction block.
7. according to the electrode catheter described in any one in claim 1～6, it is characterized in that,
The quantity of eccentric stream that is formed at the inside of described insulating properties pouring member is 1 or 2, and the quantity of branch's stream is more than 4.
8. according to the electrode catheter described in any one in claim 1～7, it is characterized in that,
At described insulating properties pouring member, along its central shaft, be formed with central through hole, and insert and be connected with central canal at described central through hole,
The retention space of described liquid is by the space envelope of the inner peripheral surface of rear end side recess of described the 1st parts and the separation of the outer peripheral face of described central canal.
9. electrode catheter according to claim 8, is characterized in that,
At described central canal, insert and be connected with the wire of front termination electrode and/or the wire of temperature sensor.
10. according to the electrode catheter described in any one in claim 1～9, it is characterized in that,
The front end of described front termination electrode bloats, and the maximum diameter of this front termination electrode is being made as to D1, and when the caliber of described catheter shaft is made as D2, the value of D1/D2 is more than 1.0.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-270140 | 2011-12-09 | ||
| JP2011270140A JP5881229B2 (en) | 2011-12-09 | 2011-12-09 | Electrode catheter |
| PCT/JP2012/079569 WO2013084679A1 (en) | 2011-12-09 | 2012-11-14 | Electrode catheter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103987335A true CN103987335A (en) | 2014-08-13 |
| CN103987335B CN103987335B (en) | 2016-06-08 |
Family
ID=48574057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280060310.1A Expired - Fee Related CN103987335B (en) | 2011-12-09 | 2012-11-14 | Electrode catheter |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5881229B2 (en) |
| KR (1) | KR101758441B1 (en) |
| CN (1) | CN103987335B (en) |
| WO (1) | WO2013084679A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114025820A (en) * | 2019-06-25 | 2022-02-08 | 株式会社钟化 | Catheter and method of manufacturing the same |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105310766B (en) * | 2014-07-17 | 2018-11-30 | 四川锦江电子科技有限公司 | Ablation catheter end electrodes with perfusion liquid functional |
| JP6456315B2 (en) * | 2016-02-16 | 2019-01-23 | 日本ライフライン株式会社 | Electrode catheter |
| KR102415983B1 (en) * | 2020-06-24 | 2022-07-04 | 권승열 | Multi catheter |
| WO2022201340A1 (en) * | 2021-03-24 | 2022-09-29 | 日本ライフライン株式会社 | Electrode catheter |
| CN113616324A (en) * | 2021-09-13 | 2021-11-09 | 心航路医学科技(广州)有限公司 | Matrix type pulsed electric field ablation catheter |
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2011
- 2011-12-09 JP JP2011270140A patent/JP5881229B2/en active Active
-
2012
- 2012-11-14 CN CN201280060310.1A patent/CN103987335B/en not_active Expired - Fee Related
- 2012-11-14 WO PCT/JP2012/079569 patent/WO2013084679A1/en active Application Filing
- 2012-11-14 KR KR1020147016390A patent/KR101758441B1/en active IP Right Grant
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| US20060163911A1 (en) * | 2005-01-25 | 2006-07-27 | Bernstein William M | Pull-out desk unit for mobile vehicle |
| US20070156131A1 (en) * | 2005-12-30 | 2007-07-05 | Keshava Datta | Ablation catheter with improved tip cooling |
| CN101442950A (en) * | 2006-05-16 | 2009-05-27 | 圣朱德医疗有限公司房颤分公司 | Ablation electrode assembly and methods for improved controlof temperature |
| US20090259222A1 (en) * | 2006-10-10 | 2009-10-15 | Huisun Wang | Ablation electrode assembly with insulated distal outlet |
| CN102232870A (en) * | 2010-04-28 | 2011-11-09 | 韦伯斯特生物官能公司 | Irrigated ablation catheter with improved fluid flow |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114025820A (en) * | 2019-06-25 | 2022-02-08 | 株式会社钟化 | Catheter and method of manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013121384A (en) | 2013-06-20 |
| CN103987335B (en) | 2016-06-08 |
| WO2013084679A1 (en) | 2013-06-13 |
| JP5881229B2 (en) | 2016-03-09 |
| KR20140102690A (en) | 2014-08-22 |
| KR101758441B1 (en) | 2017-07-14 |
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