CN104684468A

CN104684468A - Electrode catheter

Info

Publication number: CN104684468A
Application number: CN201380050333.9A
Authority: CN
Inventors: 桝田拓也
Original assignee: Japan Lifeline Co Ltd
Current assignee: Japan Lifeline Co Ltd
Priority date: 2013-01-30
Filing date: 2013-08-07
Publication date: 2015-06-03
Anticipated expiration: 2033-08-07
Also published as: KR20150111902A; TW201431575A; JP2014147410A; WO2014119030A1; TWI569828B; KR101778414B1; JP5729778B2

Abstract

An electrode catheter which is capable of tip deflection operation and which comprises: a catheter shaft (10) that has a flexible part (10A) on a distal end portion (11); a control handle (20); a catheter distal end portion (30) that is connected to the distal end side of the catheter shaft (10) and has a core wire (35) made of shape memory alloy extending inside an insulating tube (33); multiple ring-shaped electrodes (42); lead wires (50) that are connected to each of the ring-shaped electrodes (42); and an operating wire (60) for deflecting the flexible part of the catheter shaft (10), a base end portion (352) of the core wire (35) and a distal end portion (61) of the operating wire (60) being joined together. According to this electrode catheter, sufficient space can be reserved inside the catheter shaft for extending multiple lead wires.

Description

Electrode catheter

Technical field

The present invention relates to front end can the electrode catheter of deflecting operation.

Background technology

As the medical instruments being used in the arrhythmia of diagnosing or treating heart, be known to a kind of electrode catheter, possess: probe shaft, it has flexible part in leading section; Joystick, it is connected with the base end side of this probe shaft; Probe front portion, it is connected with the front of probe shaft; Multiple ring electrode, they are installed in the periphery in probe front portion; And behaviour's position, it is for making the flexible bend portions of probe shaft.

In addition, as the electrode catheter of the current potential in the positions such as the pulmonary vein for measuring heart, propose there is the electrode catheter (for example, referring to patent documentation 1) possessing the probe front portion being formed as ring-type.By probe front portion is formed as ring-type, can the inner peripheral portion of Simultaneously test blood vessel.

Fig. 6 is the axonometric chart of the shape in the probe front portion representing the electrode catheter formed involved by patent documentation 1, this probe front portion (mapping assembly) 117 is made up of the front-end side region 140 of the base end side region 138 of linearity, the body region 139 of ring-type and linearity, and is connected with the front of probe shaft 114.

The body region 139 in probe front portion 117 is formed as ring-type, is provided with multiple ring electrode (omitting diagram) in this body region 139.

Fig. 7 represents the probe shaft of electrode catheter of formation involved by patent documentation 1 and the sectional view of the coupling part in probe front portion.

Probe shaft 114 by having the 1st chamber 130, the multi-lumen tube in the 2nd chamber 132 and the 3rd chamber 134 forms.

Multiple conducting wires 150 extends in the 1st chamber 130 of probe shaft 114.

Each leading section of multiple conducting wires 150 is connected with each of multiple ring electrodes of the body region 139 being installed in probe front portion 117.On the other hand, each base end part of multiple conducting wires 150 is connected with adapter via joystick.

Behaviour's position 164 extends in the 2nd chamber 132 of probe shaft 114.

The base end part of behaviour's position 164 ties up to joystick, can carry out stretched operation to the base end part of this behaviour's position 164.On the other hand, the leading section of grasping position 164 ties up to the leading section of probe shaft 114 via anchor parts 180.

Anchor parts 180 have the leading section pieces (cross-shaped formation pieces) 182 larger than the footpath in the 2nd chamber 132, thus, inhibit the leading section of behaviour's position 164 to move to proximal direction.Its result, by carrying out stretched operation to the base end side of behaviour's position 164, can make the leading section of probe shaft 114 (flexible part) bend.

Binding agent (omitting diagram) is filled with in the front end area in the 2nd chamber 132 at leading section (the anchor parts 180) place of behaviour's position 164.Thus, leading section and the probe shaft 114 (inwall in the 2nd chamber 132) of grasping position 164 are bonded fixing.

The base end part forming the heart yearn 124 in probe front portion 117 extends in the 3rd chamber 134 of probe shaft 114.

This heart yearn 124 that probe front portion 117 is made up of marmem extends and forms in the inside of insulation tube 128.

Binding agent (omitting diagram) is filled with in the front end area in the 3rd chamber 134 of the base end part extension of heart yearn 124.Thus, the base end part of heart yearn 124 and probe shaft 114 (inwall in the 3rd chamber 134) bonded fixing.

In addition, the base end part forming the insulation tube 128 in probe front portion 117 is adhesively fixed by the leading section of binding agent 190 with probe shaft 114.

So, probe front portion 117 (heart yearn 124, insulation tube 128) is connected with the front of probe shaft 114.

Patent documentation 1: Japanese Unexamined Patent Publication 2003-111740 publication

But, in the electrode catheter described in patent documentation 1, the base end part of multiple conducting wires 150, behaviour's position 164 and heart yearn 124 extends in the different chamber (the 1st chamber 130, the 2nd chamber 132 and the 3rd chamber 134) of probe shaft 114 respectively, in the electrode catheter of this structure, the inner space that wire is extended cannot be guaranteed fully, so be difficult to make the wire of the radical corresponding with the quantity of the ring electrode being installed in probe front portion extend in the inside of probe shaft.In addition, by this electrode catheter, also cannot the increase of counter electrode number, the path of probe shaft.

In addition, in the electrode catheter described in patent documentation 1, in order to prevent probe front portion 117 from the disengaging of probe shaft 114, and the length (length of the heart yearn 124 bonded with the inwall in the 3rd chamber 134) lengthening the heart yearn 124 extended in the 3rd chamber 134 is fully needed to guarantee bonding force.On the other hand, if lengthen the heart yearn 124 extended in the 3rd chamber 134, then can the operability of probe of deflecting operation be compromised as front end.

Summary of the invention

The present invention completes based on above thing.

The object of the invention is to, a kind of electrode catheter can guaranteed in the inside of probe shaft for the sufficient space making multiple conducting wires extend is provided.

Another object of the present invention is to, shorten the heart yearn that extends in the inside of probe shaft also can effectively prevent the probe front portion be made up of this heart yearn from departing from from probe shaft even if provide, and can the also good electrode catheter of the operability of probe of deflecting operation as front end.

(1) feature of electrode catheter of the present invention is to possess:

Probe shaft, its leading section has the flexible part of multi-cavity configuration;

Joystick, it is connected with the base end side of above-mentioned probe shaft;

Probe front portion, it is connected with the front of above-mentioned probe shaft, and the heart yearn be made up of marmem extends in the inside of insulation tube;

Multiple ring electrode, they are installed in the periphery in above-mentioned probe front portion;

Multiple conducting wires, they are connected with each of above-mentioned multiple ring electrode respectively, and extend in the inside in above-mentioned probe front portion and the inside of above-mentioned probe shaft and arrive the inside of above-mentioned joystick; And

Behaviour's position, it in order to make the flexible bend portions of above-mentioned probe shaft, and extends in the inside of this probe shaft, and its leading section is tied on the leading section of above-mentioned probe shaft, and its base end part is tied on above-mentioned joystick, stretched operation can be carried out to this base end part,

The base end part of above-mentioned heart yearn engages with the leading section of aforesaid operations line.

According to the electrode catheter of this formation, engaged with the leading section of behaviour's position by the base end part of heart yearn, thus in the flexible part of multi-cavity configuration forming probe shaft, extend (both conjugants can be made to extend in a chamber) in the chamber different from the chamber that behaviour's position extends without the need to making heart yearn, so the chamber making heart yearn extend in electrode catheter in the past can be used for making wire extend, thereby, it is possible to guarantee the sufficient space for making multiple conducting wires extend in the inside of probe shaft.

In addition, the base end part forming the heart yearn in probe front portion engages with the leading section of the behaviour's position extended in the inside of probe shaft, and the base end part of this behaviour's position ties up to joystick, thus this behaviour's position plays the anticreep effect of heart yearn, so can effectively prevent probe front portion from departing from from probe shaft.

(2) in electrode catheter of the present invention, preferred above-mentioned probe front portion is formed as ring-type.

Can install many (such as more than 6) ring electrode in the probe front portion being formed as ring-type, need together therewith many wires are extended in the inside of probe shaft, so in this case, structure of the present invention is effective especially.

(3) in electrode catheter of the present invention, preferred above-mentioned probe shaft has single chamber structure in the front of the flexible part of multi-cavity configuration, in this single chamber, the base end part of above-mentioned heart yearn engages with the leading section of aforesaid operations line.

(4) in the electrode catheter of above-mentioned (3), preferably suppressing the leading section of aforesaid operations line in the inside of the tubulose mooring parts of proximal direction movement, the base end part of above-mentioned heart yearn engages with the leading section of aforesaid operations line.

According to electrode catheter of the present invention, the sufficient space for making multiple conducting wires extend can be guaranteed in the inside of probe shaft.

In addition, even if shorten the heart yearn extended in the inside of probe shaft, also can effectively prevent the probe front portion be made up of this heart yearn from departing from from probe shaft.

In addition, because the heart yearn extended in the inside of probe shaft can be shortened, thus as front end can the operability of probe of deflecting operation also excellent.

Accompanying drawing explanation

Fig. 1 is the axonometric chart of the embodiment representing electrode catheter of the present invention.

Fig. 2 A is the key diagram of the leading section observing the electrode catheter shown in Fig. 1 from front.

Fig. 2 B is the key diagram of the leading section representing the electrode catheter shown in Fig. 1.

Fig. 3 is the longitudinal section (the A-A sectional view of Fig. 2 A) of the leading section representing the electrode catheter shown in Fig. 1.

Fig. 4 is the enlarged partial sectional view (B portion details drawing) of Fig. 3.

Fig. 5 is the sectional elevation (the C-C sectional view of Fig. 4) in the leading section of the electrode catheter shown in Fig. 1.

Fig. 6 is the axonometric chart of the shape in the probe front portion representing formation electrode catheter in the past.

Fig. 7 is the sectional view representing the probe shaft of formation electrode catheter in the past and the coupling part in probe front portion.

Detailed description of the invention

Below, the embodiment of accompanying drawing to electrode catheter of the present invention is used to be described.

The electrode catheter 100 of the present embodiment shown in Fig. 1 ~ Fig. 5 possesses: probe shaft 10, and it has the flexible part 10A of multi-cavity configuration in leading section 11; Joystick 20, it is connected with the base end side of probe shaft 10; Probe front portion 30, it is connected with the front of probe shaft 10, and the heart yearn 35 be made up of marmem is in the inside of insulation tube 33, and extension forms, and is formed as ring-type; 9 ring electrodes 41, they are installed in the periphery in probe front portion 30; Front termination electrode 42, it is installed in the front end in probe front portion 30; 10 wires 50, they with this front termination electrode 42 and each of ring electrode 41 be connected, extend in the inside in probe front portion 30 (insulation tube 33) and the inside of probe shaft 10 and arrive the inside of joystick 20; Behaviour's position 60, it bends to make the flexible part 10A of probe shaft 10, and extends in the inside of this probe shaft 10, and its leading section 61 ties up to the leading section 11 of probe shaft 10, and its base end part ties up to joystick 20, stretched operation can be carried out to this base end part; And tubulose mooring parts 70, leading section 61 is tied up to the leading section 11 of probe shaft 10, the base end part 352 of heart yearn 35 and the interior bonds of the leading section 61 of behaviour's position 60 at tubulose mooring parts 70 by suppressing the leading section 61 of behaviour's position 60 to be moved to proximal direction by it.

Electrode catheter 100 possesses probe shaft 10, joystick 20,30,9, probe front portion ring electrode, 41,1 front termination electrode, 42,10 wires 50, behaviour's position 60 and tubulose mooring parts 70.

In addition, in Fig. 4 and Fig. 5, a part for 10 wires 50 is illustrated.

The probe shaft 10 forming the electrode catheter 100 of present embodiment has the flexible part 10A of multi-cavity configuration in its leading section 11.Herein, so-called " flexible part " refers to by carrying out stretched operation and can the shaft portion of buckling deformation (bending) to behaviour's position 60.

As shown in FIG. 4 and 5, the flexible part 10A of probe shaft 10 is made up of multi-lumen tube 111 and the flexible hose 15 that covers its periphery.In addition, as shown in Figure 5,4 chambeies (the 1st chamber 11L, the 2nd chamber 12L, the 3rd chamber 13L and the 4th chamber 14L) are formed with in multi-lumen tube 111.

As the constituent material of multi-lumen tube 111, be not particularly limited, but the resins such as polyurethane, nylon, PEBAX (polyether block amide) can be illustrated.

In addition, as the flexible hose 15 of the periphery of covering multi-lumen tube 111, the flexible hose weaving the flexible pipe be made up of the resin of polyurethane, nylon, PEBAX etc. with stainless steel silk can be enumerated.

The flexible hose 15 covering the periphery of multi-lumen tube 111 extends further in the front of flexible part 10A (multi-lumen tube 111) and forms single lumen catheter.

As the external diameter of probe shaft 10, being preferably below 3.0mm, further preferred 1.2 ~ 2.4mm, if illustrate a preferred example, is 1.7mm.

The joystick 20 forming the electrode catheter 100 of present embodiment is connected with the base end side of probe shaft 10.In FIG, 21 is handles, and 22 is actuators.

By making actuator 22 slide to base end side, thus the flexible part 10A of probe shaft 10 bends, and probe front portion 30 deflects together therewith.

Therefore, by operating control handle 20, probe front portion 30 is rotated, makes it deflect further, probe front portion 30 can be guided to object position.

In the inside of insulation tube 33, extension forms the heart yearn 35 that the probe front portion 30 forming electrode catheter 100 is made up of marmem.

In fact probe front portion 30 is formed as circular ring-type.Thereby, it is possible to the inner peripheral portion of Simultaneously test blood vessel.In addition, probe front portion 30 is not the closed loop of smooth circle, but spiral ring (when being called " circle " in the present invention, comprises spiral shape strictly speaking.)。

If the heart yearn 35 be made up of marmem remembers the annular in probe front portion 30, is easily out of shape (being such as deformed into linearity) by applying power, but removing power, returns annular.

Constituent material as heart yearn 35 can enumerate Ni-Ti alloy.The ratio of Ni and the Ti in preferred Ni-Ti alloy is 54:46 ~ 57:43.Nitinol can be enumerated as preferred Ni-Ti alloy.

As the diameter of heart yearn 35, such as, being 0.1 ~ 1.0mm, preferably 0.2 ~ 0.5mm, if illustrate a preferred example, is 0.36mm.

The inside of insulation tube 33 is communicated with the inside of probe shaft 10.

As the constituent material of insulation tube 33, the resin material of polyurethane or the such biocompatibility of PEBAX can be enumerated.

In probe front portion 30, at its outer peripheral face, 9 ring electrodes 41 are installed.Further, termination electrode 42 before the front end in probe front portion 30 is provided with.

As the constituent material of ring electrode 41 and front termination electrode 42, the conductive materials such as platinum, gold, iridium or their alloy can be enumerated.

In addition, as the quantity of ring electrode 41 being installed in probe front portion 30, be certainly not limited to 9, as the quantity of ring electrode forming electrode catheter of the present invention, such as, be 6 ~ 20, be preferably 8 ~ 12.

Wire 50 is connected respectively with ring electrode 41 and front termination electrode 42.The inside of insulation tube 33 is entered from the pore of the tube wall being formed at insulation tube 33 with each wire be connected 50 of ring electrode 41.With each 10 wires 50 be connected of ring electrode 41 and front termination electrode 42 in the inside of insulation tube 33, the inside (the 2nd chamber 12L, the 3rd chamber 13L and the 4th chamber 14L) of probe shaft 10 extends and is inserted into the inside of joystick 20.And each base end part of wire 50 is electrically connected with the adapter of the cardinal extremity being arranged at joystick 20.

The behaviour's position 60 forming electrode catheter 100 bends to make the flexible part 10A of probe shaft 10, and extends in the inside (the 1st chamber 11L of multi-lumen tube 111) of probe shaft 10.

The leading section 61 of behaviour's position 60 is tied on the leading section 11 of probe shaft 10 via tubulose mooring parts 70 described later.

On the other hand, the base end part of behaviour's position 60 is tied on the inside of joystick 20, thereby, it is possible to carry out the stretched operation of the base end side grasping position 60.

As the constituent material of behaviour's position 60, rustless steel and Ni-Ti alloy etc. can be enumerated.Preferred operations with the surface of line 60 by coverings such as PTFE " Teflon (registered trade mark) ".

Diameter as behaviour's position 60 is such as 0.1 ~ 0.5mm, preferably 0.20 ~ 0.25mm, if illustrate a preferred example, is 0.21mm.

The tubulose mooring parts 70 forming electrode catheter 100 have the external diameter larger than the footpath of the 1st chamber 11L, for suppressing the leading section 61 of the behaviour's position 60 fixed therein to the anchor parts of proximal direction movement, being configured in the inside of the leading section 11 (than the single lumen catheter of multi-lumen tube 111 near front) of probe shaft 10.

In the inside of these tubulose mooring parts 70, the base end part 352 of heart yearn 35 engages with the leading section 61 of behaviour's position 60.

The method engaged as the leading section 61 making the base end part 352 of heart yearn 35 with behaviour's position 60 is not particularly limited, such as, the method etc. of the tubulose mooring parts 70 of the base end part 352 that the method for the fixture 80 of scolding tin, brazing material, binding agent etc. is filled in inside (gap), riveted joint is inserted with heart yearn 35 that can be illustrated in the tubulose mooring parts 70 of the leading section 61 of the base end part 352 being inserted with heart yearn 35 and behaviour's position 60 and the leading section 61 of behaviour's position 60.

As shown in Figure 4, the base end part 332 forming the insulation tube 33 in probe front portion 30 enters the leading section 11 (inside of single lumen catheter) of probe shaft 10, in this condition, is fixed in the front end of probe shaft 10 by binding agent 90.

In addition, the base end part 352 forming the heart yearn 35 in probe front portion 30 together with insulation tube 33 enters the leading section 11 (inside of single lumen catheter) of probe shaft 10, in the inside of tubulose mooring parts 70 being configured in this, engage with the leading section 61 of behaviour's position 60.

Thereby, it is possible to make probe front portion 30 firmly be connected with the front of probe shaft 10.

In addition, from guarantee can the viewpoint of good operability of deflecting operation probe as front end, as the leading section 11 towards probe shaft 10 heart yearn 35 enter length (in the diagram by shown in L35), be preferably below 10mm.

In the electrode catheter 100 of present embodiment, the actuator 22 of joystick 20 is made to slide (stretched operation) to base end side, thus by the piston mechanism in the inside of joystick 20, behaviour's position 60 moves to base end side, but because inhibit the leading section 61 of behaviour's position 60 to move to proximal direction by tubulose mooring parts 70 (anchor parts), so the flexible part 10A flexure of probe shaft 10, its result, probe front portion 30 deflects.In addition, if make actuator 22 forward end Slideslip and return to original position, then probe front portion 30 can be turned back to original direction.

Electrode catheter 100 according to the present embodiment, the base end part 352 of heart yearn 35 engages in the inside of tubulose mooring parts 70 with the leading section 61 of behaviour's position 60, thus without the need to making the chamber of the base end part 352 of heart yearn 35 beyond the 1st chamber 11L of multi-lumen tube 111 (the 2nd chamber 12L, the 3rd chamber 13L or the 4th chamber 14L) extend, can be used in all wires 50 are extended in these 3 chambeies.Thereby, it is possible to guarantee the sufficient space for making 10 wires 50 extend in the inside of probe shaft 10.

In addition, the base end part 352 of heart yearn 35 extends relative in the inside (the 1st chamber 11L) of probe shaft 10, and its base end part is tied on the leading section 61 of behaviour's position 60 of the inside of joystick 20 and is engaged, thus this behaviour's position 60 can play the anticreep effect of heart yearn 35.Its result, even if the length of the heart yearn 35 extended in the inside of probe shaft 10 shortens (even if not making the base end part of heart yearn 35 enter the chamber of multi-lumen tube 111), also can effectively prevent the probe front portion 30 be made up of this heart yearn 35 from departing from from probe shaft 10.

In addition, because the length (above-mentioned enters length L35) of the heart yearn 35 extended in the inside of probe shaft 10 is short, thus operability is also excellent.

Above, one embodiment of the present invention is illustrated, but electrode catheter of the present invention is not limited thereto, can various change be carried out.

Such as, also can not in the inside of probe shaft configuration tubulose mooring parts (anchor parts), and the base end part of heart yearn be made to pass through with the leading section of behaviour's position joints such as welding.

In addition, also can use the fixture replacing tubulose mooring parts, the base end part of heart yearn is mechanically engaged with the leading section of behaviour's position.

In addition, also can, in the inside of multi-lumen tube, the base end part of heart yearn be engaged with the leading section of behaviour's position.

In addition, single chamber structure can be set in the front of multi-lumen tube yet.

In addition, the quantity in the chamber in multi-lumen tube may not be 4, and is such as formed with 2 ~ 9 chambeies.

In addition, also can be the electrode catheter of two-way type possessing 2 behaviour's positions, in this case, the base end part of heart yearn relative to behaviour's position of any one party leading section and be engaged.

Reference numeral explanation

100... electrode catheter; 10... probe shaft; The flexible part of 10A...; 11... the leading section of probe shaft; 11L... the 1st chamber; 12L... the 2nd chamber; 13L... the 3rd chamber; 14L... the 4th chamber; 15... flexible hose; 20... joystick; 21... handle; 22... actuator; 30... probe front portion; 33... insulation tube; 35... heart yearn; 352... the base end part of heart yearn; 42... front termination electrode; 41... ring electrode; 42... front termination electrode; 50... wire; 60... position is grasped; 61... the leading section of position is grasped; 70... tubulose mooring parts (anchor parts); 80... fixture; 90... binding agent.

Claims

1. an electrode catheter, is characterized in that, possesses:

Joystick, it is connected with the base end side of described probe shaft;

Probe front portion, it is connected with the front of described probe shaft, and the heart yearn be made up of marmem is in the inside of insulation tube, and extension forms;

Multiple ring electrode, they are installed in the periphery in described probe front portion;

Multiple wire, they are connected with each of described multiple ring electrode respectively, and extend in the inside in described probe front portion and the inside of described probe shaft and arrive the inside of described joystick; And

Behaviour's position, it in order to make the flexible bend portions of described probe shaft, and extends in the inside of this probe shaft, and its leading section is tied on the leading section of described probe shaft, and its base end part is tied on described joystick, stretched operation can be carried out to this base end part,

The base end part of described heart yearn engages with the leading section of described behaviour's position.

2. electrode catheter according to claim 1, is characterized in that,

Described probe front portion is formed as ring-type.

3. the electrode catheter according to claims 1 or 2, is characterized in that,

Described probe shaft has single chamber structure in the front of the flexible part of multi-cavity configuration, described in this single chamber, the base end part of heart yearn engages with the leading section of described behaviour's position.

4. electrode catheter according to claim 3, is characterized in that,

In the inside of leading section to the tubulose mooring parts of proximal direction movement suppressing described behaviour's position, the base end part of described heart yearn engages with the leading section of described behaviour's position.

5. the electrode catheter according to claims 1 or 2, is characterized in that,

The length that enters towards the described heart yearn of the leading section of described probe shaft is below 10mm.

6. the electrode catheter according to claims 1 or 2, is characterized in that,

The external diameter of described probe shaft is below 3.0mm, and the diameter of described heart yearn is 0.1 ~ 1.0mm.