CN102258823A

CN102258823A - Catheter

Info

Publication number: CN102258823A
Application number: CN2011101024989A
Authority: CN
Inventors: 森谦二
Original assignee: Japan Lifeline Co Ltd
Current assignee: Japan Lifeline Co Ltd
Priority date: 2010-04-21
Filing date: 2011-04-21
Publication date: 2011-11-30
Also published as: KR20120114405A; KR101213012B1; CN104739375B; CN202086915U; TWI458509B; JP4679668B1; WO2011132409A1; TW201200184A; CN104739375A; JP2011224214A

Abstract

The disclosed catheter has an annular structure wherein a distal tubular member (4) and a proximal tubular member (5) are coupled. Within the distal tubular member (4), tubes (41, 42), into which wires for operation are inserted, are provided at the outer periphery of the tubular member (4). Also, within the proximal tubular member (5), an inner cylinder (5b), into which wires for operation are inserted, is provided at the center portion of the cross-section of the tubular member (5). An intermediate member (100) is installed between the inner cylinder (5b) and the tubes (41, 42). One of the tubes (41) and the inner cylinder (5b) are connected by a pathway (112) provided to the intermediate member (100). Also, the other tube (42) and the inner cylinder (5b) are connected by another pathway (114) provided to the intermediate member (100). The pathway (112) and the other pathway (114) are both inclined from the inner cylinder (5b) towards the tubes (41, 42) in a manner so as to approach the periphery of the proximal tubular member (5).

Description

Conduit

Technical field

The present invention relates to a kind of conduit.Particularly, the present invention relates to a kind ofly, can be easy to make be inserted into the conduit that near the direction the endoceliac far-end changes by the operating portion that is configured in external near-end one side is operated.

Background technology

In the conduit of electrode catheter that is inserted into heart inside by blood vessel etc., by operating portion is operated, and the direction that is inserted into intravital distal end of catheter (tip) is deflected, described operating portion is installed on the near-end that is disposed at external conduit (cardinal extremity or near at one's side a side).

The prior art document

Patent documentation 1: TOHKEMY 2008-245766 communique

Summary of the invention

In existing conduit, has following problem, promptly, directly elongate cardinal extremity one side (near-end one side) from leaf spring owing to operating with tinsel, therefore when operating portion is operated, because of position wiry is used in operation, conduit is not only from the tip, and the centre of conduit (for example from) beginning is crooked on the whole, thereby causes the operation sense in the conduit operation to descend.

The present invention finishes in view of above problem, and its purpose is, near the direction a kind of far-end that can change conduit is provided and improves the technology of operability.

One embodiment of the present invention are conduits, it is characterized in that, described conduit possesses: have flexible tubular part; The resistance to compression parts of hollow structure, it is along the core in the tubular part cross section that axially is set at tubular part near-end one side inside of tubular part; Pipe section, its along tubular part axially be set at tubular part far-end one side inside, than the part of the more close periphery of core in tubular part cross section; Intermediate member, it is set between resistance to compression parts and the pipe section, and wherein is provided with passage, and described passage connects passage that is formed on the resistance to compression components interior and the passage that is formed on pipe section inside; The operation tinsel, it is inserted into the passage that is arranged in the resistance to compression parts, be arranged on the passage in the intermediate member and be arranged in the passage in the pipe section, and be used for the direction of far-end is operated, the tunnel-shaped that is arranged in the intermediate member is become, from the resistance to compression component side to the pipe section side and the periphery of more close tubular part.

According to present embodiment, along the core of conduit and will operate near-end one side that is inserted into conduit with tinsel, and along outer Monday of the side of conduit, and will operate far-end one side that is inserted into conduit with tinsel.In this way, because operation is positioned at outer Monday of the side of conduit with far-end wiry, therefore when the distal metal silk is carried out stretched operation, the moment of torsion that is applied on the distal end of catheter is increased, and can reduce the probability that conduit produces bending etc. on the whole.Consequently, the distal portions of conduit becomes and is easy to bending, and the deviation between near curved shape the far-end of conduit and the desirable curved shape of user tails off, thereby can improve the operation sense of user.

The conduit of above-mentioned embodiment also possesses: other pipe section, it is axial along tubular part, and be set at tubular part far-end one side inside, in the zone of the core in tubular part cross section and an opposite side with pipe section, and be set at part than the more close periphery of core in tubular part cross section; Other passages, it is set in the intermediate member, is used for passage that is formed on the resistance to compression components interior and the passage that is formed on other pipe section inside are connected; Other operation tinsels, it is inserted into the passage that is arranged in the resistance to compression parts, be arranged on other passages in the intermediate member and be arranged in the passage in other pipe section, and be used for the direction of far-end is operated, other tunnel-shaped that are arranged in the intermediate member can be become, from the resistance to compression component side to other pipe section sides and the periphery of more close tubular part.And, also can between pipe section and other pipe section, be provided with the leaf spring that axially extends along tubular part.

According to the present invention, can change near the direction the far-end of conduit and improve operability.

Description of drawings

Fig. 1 is the concise and to the point side view of the related conduit of present embodiment.

Fig. 2 is the concise and to the point vertical view of the related conduit of present embodiment.

Fig. 3 is the fragmentary cross sectional view along the A-A line of Fig. 1.

Fig. 4 is the fragmentary cross sectional view of the A '-A ' line along Fig. 2.

Fig. 5 is in the face of the fragmentary perspective view along the cross section of the B-B line of Fig. 2.

Fig. 6 is the sectional view along the C-C line of Fig. 1.

Fig. 7 is the sectional view along the D-D line of Fig. 3.

Fig. 8 is the sectional view along the E-E line of Fig. 3.

Fig. 9 is the fragmentary perspective view of intermediate member, comprise catheter shaft to the cross section and with the cross section of catheter shaft on vertical direction.

Symbol description

2 conduits, 4 tubular parts

5 tubular part 20A first areas

20B

second area

22A, 22B space

30

leaf spring

30a, 30b first type surface

30c,

30d side

30e, 30f end

31,32,33,34,35,36 passages

41,42,43,44,45,46 pipelines

50a, 50b operation tinsel

100 intermediate members

The specific embodiment

With reference to the accompanying drawings, embodiments of the present invention are described.In addition, in all accompanying drawings, the symbol identical to identical structural element labelling, and suitably omitted explanation.

(embodiment)

The conduit of present embodiment is the electrode catheter that can carry out most advanced and sophisticated deflection operation, and for example, it can be used for the ARR diagnosis or the treatment of heart.Fig. 1 is the concise and to the point side view of the related conduit of embodiment 1, and Fig. 2 is the concise and to the point vertical view of the related conduit of embodiment 1.Fig. 3 is the fragmentary cross sectional view along the A-A line of Fig. 1.Fig. 4 is the fragmentary cross sectional view of the A '-A ' line along Fig. 2.In addition, in Fig. 3 and Fig. 4, the tinsel 50a of operation hereinafter described, 50b have been omitted.

As depicted in figs. 1 and 2, embodiment 1 related conduit 2 possesses: tubular part 4, tubular part 5, handle 6, most advanced and sophisticated chip electrode 10 and a plurality of ring electrode 12a～12k (below, in appropriate circumstances ring electrode 12a～12k is referred to as " ring electrode 12 ").

The conduit 2 of present embodiment has: the tubular part 5 that will be arranged on the tubular part 4 of far-end one side and be arranged on near-end one side connects and the tubular structure (tubular part) that forms.

Conduit 2 has: be positioned at most advanced and sophisticated chip electrode 10 and ring electrode 12 on the distal portion of tubular part 4.For example, most advanced and sophisticated chip electrode 10 is fixed on the tubular part 4 by binding agent or fusion joint etc.And, by bonding, riveted joint etc., ring electrode 12a～12k is fixed on the outer peripheral face of tubular part 4.Quantity to ring electrode 12 is not particularly limited, and can it suitably be set according to quantity that can be inserted into the lead in the tubular part 4 etc.

Handle 6 is installed on the near-end of tubular part 5.And, knob 7 is installed on handle 6, described knob is used to carry out the deflection operation operation of free break-in (can) of the point of tubular part 4.Constituted operating portion by handle 6 and knob 7.

As shown in Figure 3 and Figure 4, tubular part 4 is made of urceolus 4a and inner core 4b, and described urceolus 4a has single cavity configuration; Described inner core 4b is set at the intracavity of urceolus 4a, and has accommodation space 20.Inner core 4b extends in the regulation zone of the far-end of urceolus 4a.And, the outer peripheral face of the inner peripheral surface of urceolus 4a and inner core 4b is close to mutually and is fixed.Fixing between urceolus 4a and the inner core 4b can be used methods such as bonding, deposited.As mentioned below, in accommodation space 20, be provided with leaf spring and a plurality of passage (in Fig. 3, only illustrating passage 31,32 (pipeline 41,42)) (with reference to Fig. 5 and Fig. 6).Tubular part 4 is preferably, and near the flexibility its far-end is higher relatively, and near the flexibility its near-end is relatively low.For example, tubular part 4 has the structure that parts I, parts II and parts III are engaged, and described parts I is configured in far-end one side and its Shore D hardness is 20～63; Near-end one side of described parts II and parts I is in abutting connection with configuration, and its Shore D hardness is 45～72 and lower than the flexibility of parts I; Near-end one side of described parts III and parts II is in abutting connection with configuration, and its Shore D hardness is 55～80 and lower than the flexibility of parts II.In addition, tubular part 4 can be the structure of urceolus 4a and becoming one of inner core 4b.And tubular part 4 also can be that urceolus 4a is multiwalled structure.

The major part of tubular part 4 for example is made of synthetic resin such as polyolefin, polyamide, polyphenylene ether-polyamide, polyurethanes.The external diameter of tubular part 4 generally is approximately 0.6～3mm, and its length is approximately 500～1200mm.In the present embodiment, the external diameter of tubular part 4 is approximately 2.0mm, and its length is approximately 1170mm.

Most advanced and sophisticated chip electrode 10 and ring electrode 12 for example are made of electric conductivity good metal such as aluminum, copper, rustless steel, gold, platinum.In addition, have good x-ray imaging in order to make most advanced and sophisticated chip electrode 10 and ring electrode 12, and preferably it is made of platinum or platinum alloy.Though the external diameter to most advanced and sophisticated chip electrode 10 and ring electrode 12 is not particularly limited, preferably identical with the external diameter of tubular part 4 degree is typically about 0.5～3mm.

Fig. 5 is in the face of the fragmentary perspective view along the cross section of the B-B line of Fig. 2.Fig. 6 is the sectional view along the C-C line of Fig. 1.As shown in Figure 4 and Figure 5, the conduit 2 of present embodiment possesses leaf spring 30 and a plurality of

passage

31,32,33,34,35,36 in the inside of tubular part 4.

In the present embodiment, in accommodation space 20, taken in leaf spring 30.Leaf spring 30 is the plate bodys that axially extend along tubular part 4, and described leaf spring has: along two first type surface 30a, the 30b axially extending of tubular part 4; And along two side 30c, the 30d axially extending of tubular part 4.And, till the far-end of leaf spring 30 extends near the far-end of tubular part 4 always, the near-end of leaf spring 30 from the remote extension of tubular part 4 to the distance of regulation till.At this,, leaf spring 30 is arranged in the accommodation space 20 with along the end 30e of the axial side of tubular part 4 and the mode that end 30f is embedded to tubular part 4 (inner core 4b).In this way, accommodation space 20 is divided into two zones.Promptly, accommodation space 20 is divided into: be positioned at the first area 20A of first type surface 30a one side of leaf spring 30 and the second area 20B that is positioned at another first type surface 30b one side of leaf spring 30.

At this, described " end 30e and end 30f are embedded to tubular part 4 (inner core 4b) " is meant, the side 30c, the 30d that axially extend in leaf spring 30 along tubular part 4, and among two first type surface 30a, the 30b with this side 30c, the approaching zone of 30d, all contact with tubular part 4.In the present embodiment, at axial Zone Full, two

end

30e, 30f of leaf spring 30 all contact with the inwall of inner core 4b.Because in this way, the total length of leaf spring 30 all is fastened on the tubular part 4, therefore can for when having operated, produced with tinsel, leaf spring 30 limits with respect to the distortion of tubular part 4.Consequently, the torsion rigidity of conduit 2 can increase, thereby can further improve the flatness in the bending section of conduit 2.In addition, leaf spring 30 existing scopes can suitably be set according to length of the bending area of conduit 2 etc.

In first area 20A that distinguishes by leaf spring 30 and second area 20B, be respectively arranged with a plurality of passages.In the present embodiment, in the 20A of first area, be provided with

passage

31,33,34, in second area 20B, be provided with

passage

32,35,36.To be arranged on the passage 31 in the 20A of first area and be arranged on passage 32 in the second area 20B, use with passage wiry as being used for inserting operation respectively.And, to be arranged on the passage 33,34 in the 20A of first area and be arranged on

passage

35,36 in the second area 20B, begin to extend and the passage of a plurality of leads of being electrically connected with most advanced and sophisticated chip electrode 10 and ring electrode 12 uses as being used to insert from handle 6.

A plurality of passages 31～36 have been formed respectively by a plurality of

pipelines

41,42,43,44,45,46 (pipe section).Promptly, in the present embodiment, in accommodation space 20, taken in a plurality of pipelines 41～46 with hollow structure, the hollow space of a plurality of pipelines 41～46 just becomes passage 31～36 respectively.Pipeline 41,42 is equivalent to be used for insert operation pipe section wiry respectively.The internal diameter of the

pipeline

41,42 in the present embodiment is the diameter of

passage

31,32, for example is about 0.34mm, and the internal diameter of pipeline 43～46 is the diameter of passage 33～36, for example is about 0.45mm.

Fig. 7 is the sectional view along the D-D line of Fig. 3.As Fig. 3, Fig. 4 and shown in Figure 5, tubular part 5 is made of urceolus 5a and inner core 5b, and described urceolus 5a has hollow structure; Described inner core 5b is set at the inside of urceolus 5a and has hollow structure.The external diameter of tubular part 5 equates with the external diameter of tubular part 4, generally is about 0.6～3mm, and in the present embodiment, the external diameter of tubular part 5 is about 2.0mm.And the length of tubular part 5 generally is about 600mm～1500mm, and in the present embodiment, the length of tubular part 5 is about 820mm.

Urceolus 5a is made of the synthetic resin that has enrolled fabric.Synthetic resin as constituting urceolus 5a for example comprises polyolefin, polyamide, polyphenylene ether-polyamide, polyurethanes etc.By the intermediate member 100 of the passage that outer wall surrounded 80 of the inwall of urceolus 5a and inner core 5b by hereinafter described, and by pipeline 43 formed passages 33, by pipeline 44 formed passages 34, be communicated with by pipeline 45 formed passages 35 and by pipeline 46 formed passages 36.

Along urceolus 5a axially, inner core 5b is arranged on the core in the cross section of urceolus 5a.Inner core 5b is formed by the material with high resiliency rate, and in other words, the material higher by resistance to compression formed.For example, inner core 5b is by synthetic resin such as polyimides, polyether-ether-ketone, liquid crystal polymers; Hyperelastic metallic metal tube such as SUS, NiTi; Perhaps flat coil metalloid coil forms.In the present embodiment, inner core 5b is the SUS pipe.The external diameter of inner core 5b and internal diameter for example are respectively 0.92mm, 0.67mm.The intermediate member 100 that the hollow space of inner core 5b is a passage 82 by hereinafter described and is communicated with by pipeline 41 formed passages 31 and by pipeline 42 formed passages 32.In addition, inner core 5b is an example with hollow structure " resistance to compression parts ".

Fig. 8 is the sectional view along the E-E line of Fig. 3.Fig. 9 is the fragmentary perspective view of intermediate member 100, comprise conduit axial cross section and with the cross section of catheter shaft on vertical direction.

With intermediate member 100 be arranged on urceolus 5a far-end one side inside, between inner core 4b and the inner core 5b.On intermediate member 100, be provided with a plurality of passages (through hole) along the roughly axial of conduit 2.Intermediate member 100 is provided with passage 112, and passage 31 and the interior passage 82 of inner core 5b that 112 pairs in described passage is arranged in the tubular part 4 connect.And intermediate member 100 is provided with passage 114, and passage 32 and the interior passage 82 of inner core 5b that 114 pairs in described passage is arranged in the tubular part 4 connect.With the opening of far-end one side of passage 112, the opening of near-end one side, be called the far-end one side opening portion that is used for passage 112, the near-end one side opening portion that is used for passage 112 below.And, with the opening of far-end one side of passage 114, the opening of near-end one side, be called the far-end one side opening portion that is used for passage 114, the near-end one side opening portion that is used for passage 114.The far-end one side opening portion that is used for passage 112 is connected with the near-end that is used for passage 31 one side opening in being arranged on tubular part 4.And, be used for the near-end one side opening portion of passage 112, be connected with the far-end that is used for passage 82 one side opening in the inner core 5b.On the other hand, be used for the far-end one side opening portion of passage 114, be connected with the opening of the near-end that is used for passage 32 one side in being arranged on tubular part 4.And, be used for the near-end one side opening portion of passage 114, be connected with the far-end that is used for passage 82 one side opening in the inner core 5b.So,, passage 31 all is connected with passage 82 with passage 32 by intermediate member 100.

Passage 82 in the inner core 5b is positioned on the core of tubular part 5.And passage 31 and passage 32 are separated to be arranged on a side of leaf spring 30 and the opposite side of leaf spring 30 across leaf spring 30.Therefore, kernel of section with passage 112 that passage 82 is connected with passage 31, near the mode of the periphery of tubular part 5, make axial axially the tilting of passage 112 towards the end of passage 31 1 sides from the end of passage 82 1 sides with respect to tubular part 5.Equally, kernel of section with passage 114 that passage 82 is connected with passage 32, near the mode of the periphery of tubular part 5, make axial axially the tilting of passage 114 towards the end of passage 32 1 sides from the end of passage 82 1 sides with respect to tubular part 5.Therefore, the interval between passage 112 and the passage 114 will be along with more and more becoming big near passage 31 (or passage 32) from passage 82.

And, intermediate member 100 is provided with passage 116, passage 117, passage 118, passage 119, and described passage 116, passage 117, passage 118, passage 119 are respectively to being connected with passage 33, passage 34, passage 35, the passage 36 of tubular part 4 one sides by the inwall of urceolus 5a and the passage that outer wall surrounded 80 of inner core 5b.

In the present embodiment, passage 116, passage 117, passage 118 and passage 119 respectively by groove and the inwall that is used to stop up the tubular part 5 of this groove formed, described groove axially is set on the outer wall section of intermediate member 100 along tubular part 5.In addition, passage 116, passage 117, passage 118 and passage 119 can be set to through hole respectively, and described through hole is used for axially connecting intermediate member 100 along tubular part 5.

In addition, near-end one side of intermediate member 100 is provided with recess 120, and described recess 120 has the internal diameter that equates with the external diameter of inner core 5b.By in this recess 120, inserting the fore-end of inner core 5b, can fix middle parts 100 and inner core 5b.When from the near-end unilateral observation of conduit 2, the opening of near-end one side of passage 112 and passage 114 is set at the bottom of recess 120, and the passage 112 and the passage 114 that are positioned at the bottom of recess 120 are communicated with passage 82.

The material that forms intermediate member 100 is not particularly limited, for example comprises liquid crystal polymer.

Be formed with hinge (not shown) on the far-end of operation with tinsel 50a, described hinge is bigger and to be the part spherical with the diameter of tinsel 50a than the operation that is positioned at pipeline 41.Equally, also be formed with hinge (not shown) in operation on the far-end of tinsel 50b, described hinge is bigger and to be the part spherical with the diameter of tinsel 50b than the operation that is positioned at pipeline 42.Be formed with recess (not shown) in the inboard of most advanced and sophisticated chip electrode 10, in this recess, be filled with scolding tin (not shown).With being separately positioned on operation tinsel 50a, operation, be embedded in this scolding tin with the hinge on the far-end of tinsel 50b.Thus, with respect to scolding tin and most advanced and sophisticated chip electrode 10 and will operate with

tinsel

50a, 50b and fix, and connect near the far-end of tubular part 4.Operation slidably is inserted in the interior pipeline 41 of tubular part 4 with tinsel 50a.And operation slidably is inserted in the pipeline 42 with tinsel 50b.

In addition, via being formed on passage 112 in the intermediate member 100 and the passage 82 in the inner core 5b, operation is connected with knob 7 illustrated in figures 1 and 2 with the near-end of tinsel 50a.And, via being formed on passage 114 in the intermediate member 100 and the passage 82 in the inner core 5b, operation is connected with knob 7 illustrated in figures 1 and 2 with the near-end of tinsel 50b.Thus, by knob illustrated in figures 1 and 27 is operated, thereby can draw operations with

tinsel

50a, 50b, and make the far-end of conduit 2 carry out can free break-in deflection.In the present embodiment,, the arrow D1 direction of the distal deflection of conduit 2 can be made, and, the arrow D2 direction of the distal deflection of conduit 2 can be made to Fig. 2 by draw operations tinsel 50b to Fig. 2 by draw operations tinsel 50a.

In addition, by on operating, hinge being set respectively, can make operation be difficult to from scolding tin, come off with

tinsel

50a, 50b with the far-end of tinsel 50a, 50b.In this way, can improve the reliable in action of conduit 2.In addition, in the present embodiment, be fixed on the most advanced and sophisticated chip electrode 10 though will operate with

tinsel

50a, 50b, be not particularly limited in this, operation also can be fixed on the tubular part 4 etc. with the far-end of

tinsel

50a, 50b.

Most advanced and sophisticated chip electrode is inserted into the pipeline 45 that is arranged in tubular part 4 with lead 60.Most advanced and sophisticated chip electrode is electrically connected with most advanced and sophisticated chip electrode 10 with lead 60.Particularly, most advanced and sophisticated chip electrode is embedded to the far-end of lead 60 in the scolding tin of inboard of most advanced and sophisticated chip electrode 10 (not shown).Thus, by scolding tin, most advanced and sophisticated chip electrode is electrically connected with lead 60 and most advanced and sophisticated chip electrode 10.In addition, most advanced and sophisticated chip electrode also can be electrically connected with most advanced and sophisticated chip electrode 10 by welding with the far-end of lead 60.

Via be formed on the passage 118 in the intermediate member 100 and be arranged on urceolus 5a and inner core 5b between passage 80, most advanced and sophisticated chip electrode is incorporated into the inside of handle 6 with the near-end of lead 60.

In addition, a plurality of ring electrodes that will be electrically connected with each ring electrode 12 are inserted into the state of mutually insulated in the pipeline 43,44,46 with lead (not shown).Via the pore that is arranged on pipeline 43,44,46 and the tubular part 4, the far-end of each ring electrode with lead is electrically connected with each ring electrode 12.Each ring electrode is fixed on the ring electrode 12 by scolding tin (not shown) or welding with the far-end of lead.Via be formed on the passage 116 in the intermediate member 100 and be arranged on urceolus 5a and inner core 5b between passage 80, the ring electrode in the pipeline 43 that is inserted in the tubular part 4 is incorporated into the inside of handle 6 with lead.Via be formed on the passage 117 in the intermediate member 100 and be arranged on urceolus 5a and inner core 5b between passage 80, with the ring electrode lead in the pipeline 44 that is inserted in the tubular part 4, be incorporated into the inside of handle 6.And, via be formed on the passage 119 in the intermediate member 100 and be arranged on urceolus 5a and inner core 5b between passage 80, with the ring electrode lead in the pipeline 46 that is inserted in the tubular part 4, be incorporated into the inside of handle 6.

In the present embodiment, pipeline 41 contacts with

pipeline

43,44, and pipeline 42 contacts with pipeline 45,46.And, each pipeline 41～46 is fastened on the inner peripheral surface of inner core 4b.Fixing between each pipeline 41～46 and the inner core 4b can be used methods such as bonding, deposited.And, in first area 20A and second area 20B, a plurality of ducted at least a portion pipelines two

pipelines

45,46 of two

pipelines

43,44 of first area 20A one side and second area 20B one side (here for) are set to, contact with first type surface 30a, the 30b of leaf spring 30 respectively.Because in this way, leaf spring 30 can become by the state of

pipeline

43,44 and

pipeline

45,46 clampings, therefore can limit the action of leaf spring 30 with respect to the direction of twist of tubular part 4.Thereby, can further improve the torsion rigidity of conduit 2.

In addition, in first area 20A and second area 20B, will be used for inserting operation and separate setting with leaf spring 30 with

pipeline

41,42 wiry.Thereby above-mentioned situation is compared with the situation of

pipeline

41,42 more close leaf springs 30, can make leaf spring 30 bendings with littler power.Therefore, can improve the operability of conduit 2.

Pipeline

41,42 is set to, and for example the central shaft of

pipeline

41,42 is positioned at the outside of the circle of the central shaft by

pipeline

43,44,45,46.

In addition, in the present embodiment, in the 20A of first area, two

pipelines

43,44 are provided with across the centrage along the axial leaf spring 30 of conduit 2.Equally, in second area 20B, two

pipelines

45,46 are provided with across the centrage along the axial leaf spring 30 of conduit 2.And, be used for inserting operation and be set between two

pipelines

43,44 with pipeline 41 wiry, be used for inserting operation and be set between two

pipelines

45,46 with pipeline 42 wiry.In this way, owing to can on the direction parallel,

pipeline

41,42 be close to the centrage of leaf spring 30 with first type surface 30a, the 30b of leaf spring 30, so can further improve the torsion rigidity of conduit 2.And, will be used for inserting operation and be set to

pipeline

43,44 circumscribedly with pipeline 41 wiry, will be used for inserting operating and be set to

pipeline

45,46 circumscribed with pipeline 42 wiry.Thus, above-mentioned situation is separated with

pipeline

43,44 with pipeline 41 and pipeline 42 is compared with

pipeline

45,46 isolating situations, can more improve the intensity of conduit 2.

At this,, the configuration of the pipeline 41～46 in the conduit 2 of present embodiment is elaborated with reference to Fig. 6.Fig. 6 is used for the fragmentary cross sectional view that the configuration to pipeline 41～46 describes.As shown in Figure 6, in first area 20A and second area 20B, a plurality of pipelines 41～46 being arranged to, is that the imaginary circle S at center carries out inscribe with central shaft with conduit 2 respectively.Thus, can be easy to the cross sectional shape of tubular part 4 is remained circular.Cross sectional shape at tubular part 4 is under the situation of circular, is easy to conduit 2 is inserted in sheath (sheath) and the blood vessel.Therefore, according to the conduit 2 of present embodiment, can be easy to guarantee that conduit 2 has good operability.In addition, can be inserted into the size (rugosity) of the conduit 2 in the patient's body lumen, generally the maximum gauge size (diameter) partly by tubular part 4 decides.Therefore, under the situation about comparing when its maximum gauge part big or small identical, the cross section is that circular is flat pattern than the cross section or the cross section is the space availability ratio that polygonal shape more can improve conduit 2.Promptly, can increase the quantity of the lead that can be inserted in the tubular part 4 etc., and can realize the multifunction and the high performance of conduit 2.

In addition,, can improve the strength balance of tubular part 4, and can have for from the highly stable structure of multidirectional external force by the circular shape is made in the cross section of tubular part 4.For example, as mentioned above, ring electrode 12 carries out fasteningly than the bigger becket of the external diameter of tubular part 4 with tubular part 4 by the riveted joint diameter, and is fixed on the tubular part 4.By the circular shape is made in the cross section of tubular part 4, can prevent the situation that when riveted joint, tubular part 4 is out of shape because of the power that is applied on the tubular part 4.In addition, described " circular " is meant, the circle with circularity that comprises positive circle and can obtain above-mentioned effect.And, also can leaf spring 30 be set in

side

30c, 30d and the contacted mode of imaginary circle S of leaf spring 30.In this case, tubular part 4 is had for external force stable structure more.

In the present embodiment, in the 20A of first area, the mode that two

pipelines

43,44 are set to be separated from each other, in second area 20B, the mode that two

pipelines

45,46 are set to be separated from each other.Therefore, in the 20A of first area, formed the space 22A that is surrounded by

pipeline

43,44, pipeline 41 and leaf spring 30.In second area 20B, formed the space 22B that is surrounded by

pipeline

45,46, pipeline 42 and leaf spring 30.In at least one space in this

space

22A, 22B, can insert the parts (below, suitably be referred to as the crooked parts of regulating) of the bendability that is used to regulate conduit 2 as required.Parts are regulated in this bending, for example the bar of being made up of resins such as metal such as SUS, NiTi or polyether-ether-ketones.By inserting the crooked parts of regulating, can change the hardness of tubular part 4, thus, can regulate the bendability of conduit 2.Go into the crooked parts of regulating by a spatial interpolation in

space

22A, 22B, perhaps go into the mutually different crooked parts of regulating of flexibility, can make conduit 2 become the asymmetry bending at two spatial interpolations of

space

22A, 22B.

For example, by in the 22A of space, insert the crooked parts of regulating apart from the position that the far-end of conduit 2 only leaves predetermined distance, can make than bending and regulate parts more become conduit 2 towards the zone of far-end one side bending area.Thus, can make the bending range of the conduit 2 when the arrow D1 direction of Fig. 2 is carried out bending, shorter than the bending range of the conduit 2 when the arrow D2 direction of Fig. 2 is carried out bending.

Parts are regulated in the bending that is inserted in the 20A of first area, can be respectively contact with pipeline 41, two

pipelines

43,44 and leaf spring 30.And parts are regulated in the bending that is inserted in the second area 20B, also can be respectively contact with pipeline 42, two

pipelines

45,46 and leaf spring 30.In this case, tubular part 4 is had for external force stable structure more.

As described above, the leaf spring 30 in the conduit 2 of present embodiment is set at the inside of tubular part 4, so that at least a portion in the end 30e, the 30f that axially extend of tubular part 4 is embedded in the tubular part 4.Therefore, when having operated with

tinsel

50a, 50b when leaf spring 30 applied power, can prevent that leaf spring 30 is distorted with respect to tubular part 4.Thus, the torsion rigidity of conduit 2 can be improved, consequently, flatness can be improved at the bending area of conduit 2.And, thus, also can further reduce the distortion that on conduit 2, produces the bad probability of curved shape or reduce and make tubular part 4 that damaged probability take place because of leaf spring 30.In addition, because most advanced and sophisticated chip electrode is inserted in the passage 34～36 with lead with lead 60 and ring electrode, therefore can prevent the situation that lead is twined mutually along with the bending of conduit 2.Thus, can avoid on the surface of conduit 2 (tubular part 4) producing the situation such as concavo-convex that causes because of the lead that twines.

And, according to the conduit 2 of present embodiment, by intermediate member 100, can be in near-end one side of conduit 2, and insert operation with

tinsel

50a, 50b along the core of conduit 2, and in far-end one side of conduit 2, insert operation with

tinsel

50a, 50b along outer Monday of the side of conduit 2.Thus, because operation is positioned at outer Monday of the side of conduit 2 with the far-end of

tinsel

50a, 50b, therefore when operation is carried out draw operations with

tinsel

50a, 50b, can make the moment of torsion increase on the far-end that is applied to conduit 2.Consequently, the distal portions of conduit 2 is crooked easily, and the deviation between the desirable curved shape of the curved shape of the distal portions of conduit 2 and user is less, and can improve the operation sense of user.

In addition because inner core 5b has resistance to compression, therefore can prevent tubular part when having drawn operation with

tinsel

50a, 50b integrally bending, deflection, crawl.Because operation is passed through near the center of conduit 2 with

tinsel

50a, 50b, so the power on bending direction can be applied on the part of inner core 5b hardly, in other words, because power can not be applied on the compression direction (vertically) of inner core 5b, therefore can only make bent at its tip, and can prevent conduit 2 to collapse from the halfway generation.

In addition, in tubular part 5, passage has been divided into being used to insert to be operated with the passage 82 of

tinsel

50a, 50b and the passage 80 that is used to insert lead.Thus,, can not contact yet, therefore can suppress damage, and can improve the reliable in action of conduit 2 lead with the lead in the passage 80 even operation is slided in passage 82 with

tinsel

50a, 50b.

The present invention is not limited to above-mentioned embodiment, can be according to person of ordinary skill in the field's knowledge, increase the distortion of various design alterations etc. again, and this combination or the embodiment that has carried out distortion are also included within the scope of the present invention.Make up the new embodiment that is produced by above-mentioned embodiment and with following variation, have the embodiment of combination and the effect separately of variation in the lump.

In the above-described embodiment, though both ends 30e, the 30f of leaf spring 30 total lengths is embedded in the tubular part 4, also both ends 30e, the 30f of the part of leaf spring 30 total lengths can be embedded in the tubular part 4.Promptly, in the scope of the torsion rigidity effect that can obtain to improve conduit 2, as long as will along axially extended end 30e with and/or at least a portion of end 30f be embedded in the tubular part 4.

In addition, though in the conduit 2 of above-mentioned embodiment, the position consistency of the near-end of the near-end of inner core 4b and urceolus 4a, the near-end that also can make inner core 4b more extends to intermediate member 100 1 sides than the near-end of urceolus 4a.According to this mode,, therefore can improve the bonding strength between tubular part 4 and the tubular part 5 because the contact area between inner core 4b and the urceolus 5a increases.

In the conduit 2 of above-mentioned embodiment, accommodation space 20 in will being formed on inner core 4b is during as a chamber, inner core 4b has single cavity configuration, it can become the structure of taking in the pipeline 41～46 that separates with inner core 4b at the intracavity of inner core 4b, but pipeline 41～46 also can become one with tubular part 4.Promptly, inner core 4b can have the multi-cavity structure that has formed a plurality of chambeies that constitute passage 31～36 and be used to insert the through hole of leaf spring 30.In this case, the part of inwall specific thickness that is made of each chamber of passage 31～36 distance forms pipe section, and will contact with first type surface 30a, the 30b of leaf spring 30 corresponding to the pipe section of passage 33～36.Thus, can obtain to improve the effect of the torsion rigidity of conduit 2.In addition, have at inner core 4b under the situation of multi-cavity structure, first type surface 30a, the 30b of formation leaf spring 30 and side 30c, 30d all are embedded to the structure in the tubular part 4, thereby can further improve the effect of the torsion rigidity of conduit 2.And, have at inner core 4b under the situation of multi-cavity structure, though in zone, filled the constituent material of inner core 4b, also can in this zone, be provided for inserting the crooked through hole of regulating parts corresponding to space 22A, 22B.

In the above-described embodiment, though all inserted the lead that is used for electrode in passage 33～36, passage 33～36 also can not be the passage that is used to insert lead all.For example, in the part of passage 33～36, can insert the thermocouple as temperature sensor, described temperature sensor is used to detect near the temperature the far-end of conduit 2.

Utilizability on the industry

The present invention can be applicable to conduit.

Claims

1. conduit is characterized in that possessing:

Has flexible tubular part;

The resistance to compression parts of hollow structure, it is along the core in the described tubular part cross section of the described tubular part near-end of axially being set at of described tubular part one side inside;

Pipe section, its along the described tubular part far-end of axially being set at of described tubular part one side inside, than the part of the more close periphery of core in described tubular part cross section;

Intermediate member, it is set between described resistance to compression parts and the described pipe section, and wherein is provided with passage, and described passage connects passage that is formed on described resistance to compression components interior and the passage that is formed on described pipe section inside;

Tinsel is used in operation, and it is inserted into the passage that is arranged in the described resistance to compression parts, be arranged on the passage in the described intermediate member and be arranged in the passage in the described pipe section, and is used for the direction of far-end is operated,

The tunnel-shaped that is arranged in the described intermediate member is become, from described resistance to compression component side to described pipe section side and the periphery of more close described tubular part.

2. conduit according to claim 1, it possesses:

Other pipe section, it is axial along described tubular part, and be set at described tubular part far-end one side inside, in the zone of the core in described tubular part cross section and an opposite side with described pipe section, and be set at part than the more close periphery of core in described tubular part cross section;

Other passages, it is set in the described intermediate member, is used for passage that is formed on described resistance to compression components interior and the passage that is formed on described other pipe section inside are connected;

Tinsels are used in other operations, and it is inserted into the passage that is arranged in the described resistance to compression parts, be arranged on other passages in the described intermediate member and be arranged in the passage in described other pipe section, and are used for the direction of far-end is operated,

Other tunnel-shaped that are arranged in the described intermediate member are become, from described resistance to compression component side to described other pipe section sides and the periphery of more close described tubular part.

3. conduit according to claim 1 and 2,

Between described pipe section and described other pipe section, be provided with the leaf spring that axially extends along described tubular part.