CN103052422B - Dilatation Catheter - Google Patents
Dilatation Catheter Download PDFInfo
- Publication number
- CN103052422B CN103052422B CN201080068391.0A CN201080068391A CN103052422B CN 103052422 B CN103052422 B CN 103052422B CN 201080068391 A CN201080068391 A CN 201080068391A CN 103052422 B CN103052422 B CN 103052422B
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- CN
- China
- Prior art keywords
- installation site
- dilating catheter
- installing component
- elongated member
- sacculus
- Prior art date
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Classifications
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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
- A61M25/10—Balloon catheters
-
- 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
- A61M25/10—Balloon catheters
- A61M2025/1043—Balloon catheters with special features or adapted for special applications
- A61M2025/105—Balloon catheters with special features or adapted for special applications having a balloon suitable for drug delivery, e.g. by using holes for delivery, drug coating or membranes
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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
- A61M25/10—Balloon catheters
- A61M2025/1043—Balloon catheters with special features or adapted for special applications
- A61M2025/1081—Balloon catheters with special features or adapted for special applications having sheaths or the like for covering the balloon but not forming a permanent part of the balloon, e.g. retractable, dissolvable or tearable sheaths
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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
- A61M25/10—Balloon catheters
- A61M2025/1043—Balloon catheters with special features or adapted for special applications
- A61M2025/1093—Balloon catheters with special features or adapted for special applications having particular tip characteristics
-
- 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
- A61M25/10—Balloon catheters
- A61M25/1006—Balloons formed between concentric tubes
Abstract
Provided is a technology for suppressing the trapping of an elongated element included in a balloon catheter. The present invention provides a dilatation catheter. This dilatation catheter (10) comprises: catheter shafts (15, 16); a dilatation element (13) connected to one end of the catheter shaft and having a dilatation area to be dilated in the diametrical direction; and an elongated element (31) arranged along the outer circumferential surface of the dilatation area and deforming outward along with the dilatation of the dilatation area by being mounted on the catheter shafts (15, 16) at a first mounting position and a second mounting position across the dilatation area. The dilatation catheter is characterized in that a specific mounting position (45b, 71) that is at least one of the first and second mounting positions is movable relative to the catheter shafts (15, 16), and that the movement of the specific mounting position is restricted in the restricting direction that is at least one direction.
Description
Technical field
The present invention relates to a kind of foley's tube, when carrying out the dilation therapy etc. of the narrow positions of blood vessel or block part, this foley's tube inserts in organism and uses.
Background technology
In the past, in the treatment carrying out PTCA (percutaneous transluminal coronary angioplasty) and so on, foley's tube was used.The scheme around sacculus with elongated member is also proposed for foley's tube.Such as, in the foley's tube shown in patent documentation 1, be provided with elongated member at the outer circumferential side of sacculus in the mode along its length across this sacculus.Elongated member can be engaged pathological changes portion with the expansion of sacculus, thus forms the lumen (stream) of axis direction in pathological changes portion.Elongated member also has the effect of the slip that can suppress between sacculus and pathological changes portion.
On the other hand, present inventor finds that elongated member exists following problem, that is, when making sacculus shrink for choose in body foley's tube time, foley's tube is hung by cards such as the supports of pathological changes portion (such as calcification pathological changes) or indwelling and is difficult to the problem of choosing.Present inventor provides the technology that a kind of card eliminating elongated member by making one end of elongated member come off is hung in patent documentation 2.
[at first technical literature]
[patent documentation]
[patent documentation 1] Japanese Unexamined Patent Application Publication 2005-517474 publication
[patent documentation 2] Japanese Unexamined Patent Publication 2009-112361 publication
[patent documentation 3] Japanese Unexamined Patent Publication 2008-206702 publication
[patent documentation 4] Japanese Unexamined Patent Application Publication 2007-530158 publication
[patent documentation 5] Japanese Unexamined Patent Publication 10-137257 publication
But present inventor not only hangs the card eliminating elongated member and studies, but also has carried out wholwe-hearted research to suppression card extension itself.
Summary of the invention
The present invention is for solving making at least partially of above-mentioned problem in the past, and its object is to provides a kind of technology suppressing the card of elongated member to be hung in the foley's tube with elongated member.
Below, while effect, effect are shown as required, the effective device of the above-mentioned problem of solution is described.
Device 1. comprises:
Conduit axle;
Expansion member, it is located at an end of described conduit axle, has the extended region expanded in outward direction;
Elongated member, its outer peripheral face along described extended region configures, and is installed on described conduit axle, is out of shape in outward direction thus with the extension of a field of described expansion regions across described extended region in the first installation site and the second installation site,
Specific installation site as at least one party of described first installation site and described second installation site can be moved relative to described conduit axle,
The movement of described specific installation site is for the restriction direction at least one direction is restricted.
In the device 1, because the first installation site of elongated member and at least one party of the second installation site can move relative to conduit axle, therefore, it is possible to reduce the flexure of the elongated member when extended region caused because the length of elongated member has residue shrinks.Due to the main cause of the flexure of elongated member to be elongated member block on the support of pathological changes portion (such as calcification pathological changes) or indwelling extension, therefore, by reducing this flexure, the card of elongated member can be suppressed to hang.And then when can reduce drawing and the friction of blood vessel.
The flexure of elongated member is because when extended region shrinks, the length of elongated member has residue relative to the distance between the first installation site and the second installation site and produces.This is because when extended region expands, the Distance Shortened between the first installation site and the second installation site.The permanent deformation that the Distance Shortened of the first installation site and the second installation site is mainly produced when expansion member is expanded by the axial length of expansion member causes.
But, according to device 1, even if the length of elongated member has residue, because at least one party of the first installation site and the second installation site can move relative to conduit axle, therefore, the flexure of elongated member can be suppressed by absorbing this remaining length.On the other hand, because the movement of specific installation site is for the restriction direction at least one direction is restricted, therefore, it is possible to have the effect such as preventing from coming off.
It should be noted that, " elongated member " to be not limited to have when expansion member (such as sacculus) is expanded the parts as being engaged with pathological changes portion for the function of the Non-slip material that suppresses expansion member to be slided.Such as, also can have at least one in following various function, described various function is: form the function of lumen, the function as the radiography body for confirming sacculus position in vivo in vitro when expansion member is expanded as the function of the cutting edge for cutting pathological changes portion, pathological changes of nipping portion.In addition, so-called lateral direction comprise such as in diametric(al) away from the direction of the central shaft of conduit axle.
In addition, in the treatment target needing long extended region, elongated member is also long correspondingly, and bending deformation is large, therefore, it is possible to this device reducing flexure can have significant effect.Specifically, such as, in the treatment coronarius of brain or heart, shorter extended region can be utilized to tackle, but in the treatment of the peripheral vessel at such other positions of human body of such as huckle blood vessel, need long extended region, therefore, this device can have significant effect.
It should be noted that, in the treatment coronarius of brain or heart, the diameter of expansion member and length are generally respectively 2 to 4mm and about 13mm.On the other hand, in the treatment of the peripheral vessel at other positions of human body, diameter and the length of expansion member are generally respectively about 4 to 8mm and 20 to 40mm.
The dilating catheter of device 2. according to device 1, described elongated member has elastomeric element, and this elastomeric element has for the restoring force from described deformation-recovery,
Described specific installation site can moving with the action of replying along with described elongated member when described extended region shrinks.
In device 2, because the installation site of elongated member can be moved along with the reply action of elongated member when extended region shrinks, therefore, after extended region shrinks, can suppress to only have elongated member to become the situation bending the state broadened.Thereby, it is possible to suppress the card of the elongated member bending the state broadened to be hung.
The dilating catheter of device 3. according to device 1 or 2, described dilating catheter also possesses multiple described elongated member and can relative to the mobile installing component of described conduit axle movement,
Described multiple elongated member all has described specific installation site at described mobile installing component.
Device 3 is owing to can be provided with multiple elongated member relative on the mobile installing component of conduit axle movement, therefore, it is possible to the overall flexure reducing multiple elongated member.Thereby, it is possible to reduce the flexure of multiple elongated member smoothly.
The dilating catheter of device 4. according to device 3, described dilating catheter also has the limiting part of the movement limiting described mobile installing component on described restriction direction,
Described limiting part is configured between described first installation site and described second installation site.
In device 4, because the limiting part of moving-limiting installing component movement is configured between the first installation site and the second installation site, therefore, it is possible to reliably prevent from being installed on coming off of the fine rule element of conduit axle in the first installation site and the second installation site.
The dilating catheter of device 5. according to device 4, described limiting part is configured between described mobile installation portion and the link position of described expansion member between described first installation site and described second installation site.
In device 5, because limiting part is configured between mobile installation portion and the link position of expansion member, therefore, it is possible to the link position of the limiting part that mutually staggers, mobile installation portion and expansion member.Thus, the hardening such state of affairs in dilating catheter local that can prevent from causing because of the overlap of the link position of limiting part, mobile installation portion and expansion member, therefore the reduction that can suppress the buckle resistance (Application of resistance to キ Network) caused because of equipment limiting part etc.
In addition, when drawing dilating catheter, because drawing load can be scattered in conduit axle and elongated member by limiting part, when therefore also can contribute to preventing drawing, conduit axle loses.In addition, even if owing to producing bending at the link position place of expansion member or losing, also expansion member can be pulled by elongated member, therefore also there is such fail safe that comes off that can prevent expansion member.
The dilating catheter of device 6. according to device 4 or 5, described dilating catheter has multiple elongated member, and described multiple elongated member is circumferentially being connected to described mobile installing component with the interval of approximate equality relative to described mobile installing component centered by the central axis of described conduit axle.
In device 6, because multiple elongated member is connected to mobile installing component relative to mobile installing component with the interval of approximate equality, therefore, load is applied from multiple elongated member to mobile installing component with the interval of approximate equality.Thereby, it is possible to make the movement of mobile installing component smooth and easy.
The dilating catheter of device 7. according to any one of device 4 to 6, described dilating catheter also possesses force application part, the moving direction force of described mobile installing component when this force application part is replied to described elongated member described mobile installing component.
In device 7, owing to having the force application part of the moving direction force of mobile installing component when replying to elongated member, therefore, the reply of elongated member (reduction of flexure) can also be made smooth and easy and reduce flexure.
The dilating catheter of device 8. according to device 7, described force application part is configured between described limiting part and described mobile installing component.
In device 8, because force application part is between limiting part and mobile installing component, therefore, by force application spring or there is this simple structure of elastic pipe just force application part can be installed, and then coming off of force application part can effectively be prevented.
The dilating catheter of device 9. according to any one of device 1 to 8, the action of the Accompanying Deformation of described elongated member time expansion relative to described extended region in described specific installation site and be limited mobile.
In device 9, be limited mobile due to the action of the Accompanying Deformation of elongated member time expansion relative to extended region in specific installation site, therefore, it is possible to elongated member excessive deformation and leave the state of affairs of extended region when avoiding extended region to expand.
The dilating catheter of device 10. according to any one of device 1 to 9, described conduit axle is formed with the inner chamber for fluid circulation,
Described expansion member has the extended region formed with the space of described inner space, and is configured to expand under the effect of the pressure of described fluid.
In apparatus 10, because expansion member has the extended region in the space forming the inner space circulated with fluid, and be configured to expand under the effect of the pressure of this fluid, therefore, it is possible to realize the expansion under heavy load simply.
The dilating catheter of device 11. according to any one of device 1 to 10, described dilating catheter also possesses the elastic mounting part being formed with elasticity installation site, this elasticity installation site is the installation site of the side, non-described specific installation site in described first installation site and described second installation site
In described elastic mounting part, make described elasticity installation site near described specific installation site when described expansion member expansion by the elongation of described elastic mounting part, and make described elasticity installation site away from described specific installation site when described expansion member is shunk by the contraction of described elastic mounting part.
In means 11, when expansion member is shunk, because elastic mounting part pulls elongated member, therefore, it is possible to effectively suppress the flexure produced in the opposition side of specific installation site from the opposition side of specific installation site.
Accompanying drawing explanation
Fig. 1 is the concise and to the point unitary side view of the structure of the foley's tube that the first embodiment is shown.
Fig. 2 (a) illustrates the sacculus of contraction state and the schematic side view of peripheral structure thereof, and Fig. 2 (b) is the sectional elevation of Fig. 2 (a).
Fig. 3 (a) illustrates the sacculus of swelling state and the schematic side view of peripheral structure thereof, and Fig. 3 (b) is the sectional elevation of Fig. 3 (a).
Fig. 4 (a) is the longitudinal section of Fig. 2 (a), and (b) is the longitudinal section of Fig. 3 (a).
Fig. 5 is the sacculus of contraction done state after expansion is shown and the longitudinal section of peripheral structure thereof.
Fig. 6 represents the longitudinal section producing gap delta between thread-like member and sacculus.
Fig. 7 is the longitudinal section of the foley's tube of the second embodiment.
Symbol description
10, 10a ... foley's tube, 11 ... conduit is managed, 12 ... lining, 13 ... sacculus, 15 ... outboard tube, 15a ... inner chamber, 16 ... inside tube, 16a ... balloon-markers, 21 ... peri position end, 22 ... peri position side conical region, 22 ... expansion area, 23 ... straight tube region, 23 ... expansion area, 24 ... amphi position side conical region, 24 ... expansion area, 25 ... distal end section, 26 ... blade, 31 ... thread-like member, 32 ... peri position end, 33 ... distal end section, 45 ... fixing umbrella portion, 45a ... front installing hole, 45b ... base end side installing hole, 71 ... mobile installing component, 79 ... force application spring, 81 ... retainer.
Detailed description of the invention
(the first embodiment)
Below, the first embodiment of specific embodiments of the invention is described with reference to the accompanying drawings.Fig. 1 is the concise and to the point unitary side view of foley's tube 10.
As shown in Figure 1, foley's tube 10 has: conduit is managed (conduit axle) 11, is installed on the lining 12 of the peri position end (base end part) of conduit pipe 11, is installed on the sacculus 13 of the distal end section (leading section) of conduit pipe 11.
Conduit pipe 11 is made up of multiple pipe (tubular shafts), and is at least inside and outside multipipe structure (inside and outside dual tubular construction) from the half-way of length direction (axis) to the position of sacculus 13.Specifically, conduit pipe 11 has outboard tube (outboard tube) 15 and internal diameter and the external diameter inside tube (inside tube) 16 less than this outboard tube 15, by inserting inside tube 16 in outboard tube 15, thus forms above-mentioned inside and outside multipipe structure.
At this, above-mentioned outboard tube 15 and inside tube 16 are formed by polyamide series resin with the pliability with regulation.But, as long as have pliability, be not limited to polyamide series resin, polyethylene-based resin can be used, polypropylene-based resin, polyurethane series resin, the synthetic resin materials such as polyimides system resin, also can with above-mentioned each synthetic resin material for base material be to additive package in this base material.In addition, different synthetic resin material also can be used to form outboard tube 15 and inside tube 16.
Inside tube 16 extends to amphi position side and arranges compared with outboard tube 15, is provided with sacculus 13 in the distal end section of the region of the prolongation of this inside tube 16 and outboard tube 15.
Below, sacculus 13 and peripheral structure thereof is described in detail with reference to Fig. 2 ~ Fig. 4.Fig. 2 (a) is the sacculus 13 of contraction state and the schematic side view of peripheral structure thereof, and Fig. 2 (b) is the sectional elevation of Fig. 2 (a).Fig. 3 (a) is the sacculus 13 of swelling state and the schematic side view of peripheral structure thereof, and Fig. 3 (b) is the sectional elevation of Fig. 3 (a).In addition, Fig. 4 (a) is the longitudinal section of Fig. 2 (a), and Fig. 4 (b) is the longitudinal section of Fig. 3 (a).
Sacculus 13 is formed by polyamide series resin.But, as long as have pliability, be not limited to polyamide series resin, also can use polyethylene-based resin, polypropylene-based resin, polyurethane series resin, polyimides system resin, silicone rubber, natural rubber etc.
Sacculus 13 as shown in Figures 3 and 4, has peri position end 21, peri position side conical region 22, straight tube region 23, amphi position side conical region 24 and distal end section 25.In the expanded state, expand in these three regions of peri position side conical region 22, straight tube region 23 and amphi position side conical region 24.Above-mentioned zone is also referred to as expansion area 22,23,24.
As shown in Figure 4, peri position end 21 engages with outboard tube 15 sacculus 13, and distal end section 25 engages with inside tube 16.Sacculus 13 between above-mentioned both ends from the outer peripheral face of outer side covers outboard tube 15 and inside tube 16.The inner chamber 15a of outboard tube 15 forms the fluid stream guided to the inside of sacculus 13 by the compressed fluid supplied from lining 12.The inner chamber (with reference to Fig. 2 (b)) of the guiding path as seal wire is formed in inside tube 16.
Sacculus 13 is engaged with outboard tube 15 and inside tube 16 by thermally welded.But, joint method is not limited thereto, and bonding agent etc. also can be used to engage.For sacculus 13, X-ray can be utilized from the position of exterior monitoring sacculus 13.This is because in the inside of sacculus 13, two are had not to be arranged in inside tube 16 through the balloon-markers 16a of X-ray.
Sacculus 13 has following shape in the expanded state.Sacculus 13 has the outer shape in the stepped change of multiple positions cross sectional shape.Peri position end 21 is the parts engaged with outboard tube 15.Peri position side conical region 22 is that one end is connected with peri position end 21, the region that the other end is connected with straight tube region 23.Peri position side conical region 22 to have from peri position end 21 towards straight tube region 23 continuously and linearly diameter becomes large cone shape.Amphi position side conical region 24 is that one end is connected with straight tube region 23, the region that the other end is connected with distal end section 25.Amphi position side conical region 24 has from straight tube region 23 towards the distal end section 25 continuously and linearly cone shape that diminishes of diameter.Distal end section 25 is the parts engaged with inside tube 16.
As shown in Figure 2, sacculus 13 has following shape in a contracted state.Sacculus 13 is as having the form of multiple blade 26 and Multi-vane type and being formed.In the present embodiment, the quantity of blade 26 is 3, is called as 3 vane types.3 blades 26 fold to form the mode of 3 blades 26 in a contracted state.Each of 3 blades 26 is formed as the state of the surrounding being wrapped in inside tube 16.Blade 26 is also referred to as flap or assistant.
The each blade 26 vertically erected along its length as the expansion area of sacculus 13 of 3 blades 26 folds to form multiple modes at equal intervals.Between each of 3 blades 26, the outer surface along expansion area 22,23,24 is configured with 3 thread-like member 31.Thread-like member 31 is also referred to as linear device or elongated member.
Thread-like member 31 has following structure.
Thread-like member 31 is to make thread-like member 31 have suitable rigidity and flexual mode is formed with presenting the form of silk thread or monofilament.Thread-like member 31 has the elastomeric character relative to flexural deformation with restoring force.As the material forming thread-like member 31, specifically formed by polyamide series resin.It should be noted that, as long as have suitable rigidity, pliability and elasticity, be then not limited to polyamide series resin, also can use other synthetic resin.In addition, also can be not limited to synthetic resin and use rustless steel, Ni-Ti alloy or carbon fibre.Thread-like member 31 is provided with multiple.
Each thread-like member 31 is following state, that is, its cross section is formed as triangle, under the swelling state of sacculus 13, the above-mentioned triangle of each thread-like member 31 while be positioned on the outer peripheral face of sacculus 13, an angle of above-mentioned triangle is given prominence to laterally from the outer peripheral face of sacculus 13.It should be noted that, the cross section of each thread-like member 31 is not necessarily triangle.As long as can play antiskid function when sacculus 13 described later expands, the cross section of each thread-like member 31 also can be circular, can also be tetragon.
The distal end section 33 (stiff end of side, leading section) of thread-like member 31 is installed on inside tube 16 as described below.Thread-like member 31 is installed on inside tube 16 by fixing umbrella portion 45.Fixing umbrella portion 45 is formed as base material by having elastic polyamide-based elastomer.Fixing umbrella portion 45 is formed with front installing hole 45a and base end side installing hole 45b respectively in the side, leading section in fixing umbrella portion 45 and base end part side.At front installing hole 45a, fixing umbrella portion 45 is by thermally welded and be fixed on the inside tube 16 formed as base material by polyamide series resin.At base end side installing hole 45b, fixing umbrella portion 45 is by bonding or thermally welded and be fixed on the distal end section 33 of the thread-like member 31 formed by polyamide series resin.
Fixing umbrella portion 45 has the interior shape that internal diameter expands from front installing hole 45a towards base end side installing hole 45b.Utilize this shape, base end side installing hole 45b diametrically can be separated from the outer peripheral face of inside tube 16, therefore, it is possible to carry out the relative movement of base end side installing hole 45b relative to inside tube 16 by the elastic deformation in fixing umbrella portion 45.
For fixing umbrella portion 45, when sacculus 13 expands, make base end side installing hole 45b near another side (mobile installing component 71) of thread-like member 31 by the extension in fixing umbrella portion 45, when sacculus 13 shrinks, make base end side installing hole 45b away from mobile installing component 71 by the contraction in fixing umbrella portion 45.Thus, when sacculus 13 shrinks, base end side installing hole 45b can pull thread-like member 31 from the opposition side of mobile installing component 71, therefore, it is possible to effectively suppress the flexure produced in the opposition side of mobile installing component 71.It should be noted that, fixing umbrella portion 45 and base end side installing hole 45b are also hereinafter referred to as elastic mounting part and elasticity installation site.
The peri position end 32 of thread-like member 31 is installed on outboard tube 15 as described below.The peri position end 32 of thread-like member 31 is installed on outboard tube 15 by mobile installing component 71.Mobile installing component 71 in the same manner as thread-like member 31 by amide system resin formation.Mobile installing component 71 has cylindrical shape, and the internal diameter of this cylindrical shape is greater than the profile of outboard tube 15, the profile of the blade 26 of the sacculus 13 when its external diameter is less than contraction.
3 thread-like member 31 are all installed on mobile installing component 71.In the installation carried out to mobile installing component 71, in circumferentially connecting with the interval of approximate equality centered by the central axis of outboard tube 15.Thereby, it is possible to apply the load from thread-like member 31 with the interval of approximate equality, therefore, mobile installing component 71 can move (slip) along its axis direction swimmingly relative to outboard tube 15.It should be noted that, the two ends of thread-like member 31 are also referred to as the first installation site and the second installation site.
Mobile installing component 71 is installed on peri position end side (lining 12 side) compared with the retainer 81 being fixed on outboard tube 15.Retainer 81 by amide system resin formation, is fixed on outboard tube 15 by thermally welded in the same manner as thread-like member 31.Thus, the movement (movement to restriction direction) of the side forward of mobile installing component 71 is stopped part 81 and limits, but can move swimmingly to retainer 81.It should be noted that, retainer 81 is also referred to as limiting part.
Retainer 81 is fixed on the position that contacts with mobile installing component 71 before sacculus 13 expands.Such fixed position is for suppressing the generation of all gap delta as shown in Figure 6.Gap delta produces due to following reason, that is, the tension force due to thread-like member 31 is insufficient, therefore under the effect of the flexural rigidity of thread-like member 31, and thread-like member 31 becomes level and smooth shape and not along the outer shape of sacculus 13.The generation of this gap delta especially becomes the reason that thread-like member 31 avoids (dislocation) when hardening in pathological changes portion, therefore, as making the sufficient condition of the tension force of thread-like member 31, require to reduce or eliminate gap delta.
Retainer 81 is arranged between peri position end 21 and mobile installing component 71.Such configuration can make retainer 81, mobile installing component 71 and peri position end 21 (link position of sacculus 13 and outboard tube 15) mutually stagger.That is, retainer 81, mobile installing component 71 and peri position end 21 can configure in the mode do not overlapped each other.Thereby, it is possible to the situation that foley's tube 10 local preventing from causing due to the overlap of above-mentioned parts is hardening, therefore the reduction of the buckle resistance that can suppress the outfit because of retainer 81 and mobile installing component 71 and cause.
When drawing foley's tube 10, drawing load can be scattered in thread-like member 31 and outboard tube 15 by mobile installing component 71 by retainer 81, therefore, when being also conducive to preventing drawing, outboard tube 15 loses (especially preventing from losing in peri position end 21).And then, also there is fail safe, even if that is, supposition is broken in peri position end 21, owing to carrying out drawing sacculus 13 by thread-like member 31, therefore also can prevent coming off of sacculus 13.
Thread-like member 31 is only fixed by fixing umbrella portion 45 and mobile installing component 71, is not fixed relative to sacculus 13 completely.Thus, with the expansion area relative to sacculus 13 compared with the structure of whole length direction upper fixed line shape parts 31, thread-like member 31 can be set when not damaging the flexibility of sacculus 13 as far as possible.
At the outer circumferential side of sacculus 13, circumferentially installing (configuration) at equal intervals has 3 thread-like member 31.Specifically, thread-like member 31 with the blade 26 with sacculus 13 one to one mode be provided with 3, each thread-like member 31 is circumferentially arranged on the interval of 120 ° in mobile installing component 71 and fixing umbrella portion 45 at the outer circumferential side of sacculus 13.
The length dimension of thread-like member 31 is set to the length ruler modest ability of the length direction than sacculus 13.Thread-like member 31 as shown in Figure 4, etc., at the outer circumferential side of sacculus 13, is arranged to along its length across at least expansion area 22,23,24 of sacculus 13 with the state of only installing two ends.The middle part of each thread-like member 31 is positioned on the outer peripheral face of sacculus 13.
Thread-like member 31 is as shown in Fig. 2 (b), and under the contraction state of sacculus 13, each thread-like member 31 is configured in the root side of corresponding blade 26.On the other hand, thread-like member 31 is under the swelling state of sacculus 13, and as shown in Fig. 3 (b), each thread-like member 31 follows the expansion of sacculus 13 and becomes the state also protruded to radial outside displacement at the position overlapping with each blade 26.Each thread-like member 31 is to relate to fixing configuration aspects identical.But, being fixedly not limited to of thread-like member 31 is thermally welded, and bonding agent also can be used to be fixed.
The thread-like member 31 with the foley's tube 10 of said structure carries out action as follows in the expansion and contraction of sacculus 13.In the expansion process of sacculus 13,3 thread-like member 31 along with the expansion of sacculus 13 to the Direction distortion leaving inside tube 16.Thus, the thread-like member 31 with triangular cross-sectional shape is nipped the pathological changes portion of blood vessel (omit diagram) and not easily sliding, and sacculus 13 is expanded from inner side in pathological changes portion simultaneously.
On the other hand, with the distortion of thread-like member 31 accordingly, fixing umbrella portion 45 is extended by elastic deformation, and base end side installing hole 45b proximally end side moves.This limits forward end side move because mobile installing component 71 is stopped part 81.Thus, base end side installing hole 45b can near mobile installing component 71, therefore thread-like member 31 can be out of shape along with the expansion of sacculus 13.
In the contraction process of sacculus 13,3 thread-like member 31 along with the contraction of sacculus 13 to the Direction distortion near inside tube 16 side.This distortion is undertaken by the restoring force of fixing umbrella portion 45 and thread-like member 31.But present inventor finds, after sacculus 13 expands, the permanent deformation of axial shortening when main generation sacculus 13 folds and the elongation in fixing umbrella portion 45, under the effect of these remnants, becomes the state that 3 thread-like member 31 bend.This permanent deformation is all because overstrain when sacculus 13 expands produces.
Present inventor finds, this flexure is produced by following mechanism.Axial shortening when sacculus 13 folds makes retainer 81 move to distal end section side.On the other hand, the elongation in fixing umbrella portion 45 make the distal end section 33 of thread-like member 31 proximally end side move.Thus, if as in the past be mobile installing component 71 not movement structure, be namely such as the structure that the distal end section 33 of thread-like member 31 is fixed on retainer 81, then can produce flexure.
Fig. 5 is the longitudinal section that sacculus 13 under expansion after-contraction done state and peripheral structure thereof are shown.As shown in Figure 5, due to residue length by absorbing as the gap R between mobile installing component 71 and retainer 81, therefore, it is possible to reduce the flexure that caused by residue length.
According to the above present embodiment described in detail, there is following good result.
When sacculus 13 expands, thread-like member 31 can bear the tension force of appropriateness by the elastic deformation in fixing umbrella portion 45 thus the outer shape along sacculus 13 is out of shape.On the other hand, when sacculus 13 shrinks, under the effect of the restoring force of fixing umbrella portion 45 and thread-like member 31, the flexure of thread-like member 31 is eliminated.In addition, because one end of thread-like member 31 can be moved to the direction of elongating thread-like member 31 relative to outboard tube 15, therefore, it is possible to the flexure preventing the length because of thread-like member 31 from having residue and cause.Thereby, it is possible to suppress thread-like member 31 to be hung to the bracket clamp of pathological changes portion (such as calcification pathological changes) or indwelling, and when can reduce drawing and the friction of blood vessel.
(the second embodiment)
Fig. 7 is the sectional view of the foley's tube 10a that the second embodiment is shown.Foley's tube 10a is equipped with force application spring 79 between retainer 81 and mobile installing component 71, and this point is different from the first embodiment.Force application spring 79, when sacculus 13 shrinks, can be absorbed the residue length of thread-like member 31, thus can reduce the flexure of thread-like member 31 further by active force.
Force application spring 79 can be not only the metal helical spring shown in Fig. 7, also can be the resin component element with spring function such as will having elastic polyamide-based elastomer and formed as base material.It should be noted that, force application spring 79 is also referred to as force application part.
Such as be difficult to expectation when the flexural rigidity of thread-like member 31 is little when having a restoring force, or when for reply long term morbidity and longer setting sacculus 13 time, the second embodiment has significant effect.This is because in the treatment target needing long extended region, elongated member is also long correspondingly, thus bending deformation is large.Specifically, such as, in the treatment coronarius of brain or heart, shorter extended region can be utilized to tackle, but in the treatment of the peripheral vessel at such other positions of human body of such as huckle blood vessel, need long extended region, therefore, this device can have significant effect.
It should be noted that, in the treatment coronarius of brain or heart, the diameter of expansion member and length are generally respectively 2 to 4mm and about 13mm.And in the treatment of the peripheral vessel at other positions of human body, diameter and the length of expansion member are generally respectively about 4 to 8mm and 20 to 40mm.
(other embodiments)
The invention is not restricted to the content that the respective embodiments described above are recorded, such as, also can carry out as follows.
(1) in the respective embodiments described above, the thread-like member 31 of slip when being provided with as elongated member for suppressing sacculus 13 to expand, but also can setting example as when sacculus 13 expands for cutting the thread-like member of the cutting edge in pathological changes portion, banded elongated member can also be used.
(2) in the respective embodiments described above, use and there is elastic fixing umbrella portion 45, but also can use the parts be arranged on by non-resilient or that elasticity is minimum material in inside tube.But, use has the generation that elastic fixing umbrella portion 45 effectively can reduce the gap delta (with reference to Fig. 6) when sacculus 13 expands.Especially do not using in the structure of force application spring, significant effect can obtained.But, use have that elastic fixing umbrella portion 45 and force application spring can provide the initial load comprising force application spring be set in interior multiple design freedom.
(3) in the respective embodiments described above, be provided with mobile installing component in peri position end side, but also mobile installing component can be set in distal end section side.For the present invention, as long as namely at least one in the installation site at the two ends of elongated member can move relative to conduit axle specific installation site.As long as namely the movement of specific installation site limits on direction at least one direction and is limited.The restriction of the movement of specific installation site is not limited to as shown in above-described embodiment, make the movement towards a direction (amphi position side) stop completely, such as, also can arrange fixed width and carry out two-way restriction.
(4) in the respective embodiments described above, elongated member is towards the linearly formation in its two ends, but also can have such as spiral helicine structure.Like this, owing to moving installing component and rotate relative to outboard tube, therefore, it is possible to make mobile installing component smooth and easy relative to the slip of outboard tube when expanding and when shrinking.
(5) in the respective embodiments described above, apply the present invention to use in the foley's tube of the sacculus expanded under the pressure of fluid, also can have the mechanism in the region that the region that makes to be equivalent to above-mentioned expansion area is expanded along radial direction in the mechanism such as utilizing mechanical type to expand.It should be noted that, conduit axle does not need must be dual conduits structure, as long as have the conduit axle of flexual solid or hollow.The present invention can be applied to the dilating catheter using expansion member, and described expansion member is generally connected with one end of conduit axle, and has the extended region expanded in outward direction.In addition, so-called lateral direction comprise such as in diametric(al) away from the direction of the central shaft of conduit axle.
(6) in the respective embodiments described above, do not set the disengaging pattern that thread-like member 31 departs from from dilating catheter, but such as can be set as that the distal end section 33 of thread-like member 31 departs to the installation of mobile installing component 71 is easy than the peri position end 32 of thread-like member 31 to the installation in fixing umbrella portion 45.Like this, even if hang on in-vivo tissue or support because certain reason makes thread-like member 31 block, also conduit can be extracted swimmingly when unduly damaging in-vivo tissue.
(7) in the respective embodiments described above, be configured to utilize retainer 81 that mobile installing component 71 is not come off from dilating catheter, but such as also can omit retainer 81 equipment but in the movement of the peri position end 21 of sacculus 13 or peri position side conical region 22 moving-limiting installing component 71.And then, can the position of retainer 81 equipment by X-ray not the X-ray that forms of permeable material not through labelling, and it can be used as movement restricting member to play function.
Claims (10)
1. a dilating catheter, is characterized in that, possesses:
Conduit axle;
Expansion member, it is located at an end of described conduit axle, has the extended region expanded in outward direction;
Elongated member, its outer peripheral face along described extended region configures, and is installed on described conduit axle, is out of shape in outward direction thus with the extension of a field of described expansion regions across described extended region in the first installation site and the second installation site;
Mobile installing component, it has cylindrical shape, and this cylindrical shape has the internal diameter larger than the external diameter of described conduit axle and has the external diameter less than the external diameter of described expansion member when shrinking, and described mobile installing component can move relative to described conduit axle,
Specific installation site as at least one party of described first installation site and described second installation site can be moved relative to described conduit axle,
The movement of described specific installation site for the restriction direction at least one direction is restricted,
Described elongated member is formed by elastomeric element, and this elastomeric element has for the restoring force from described deformation-recovery,
Described specific installation site can be moved along with the action with reply of described elongated member when described extended region shrinks,
Described elongated member has described specific installation site at described mobile installing component.
2. dilating catheter according to claim 1, is characterized in that,
Described dilating catheter also possesses multiple described elongated member,
Described multiple elongated member all has described specific installation site at described mobile installing component.
3. dilating catheter according to claim 2, is characterized in that,
Described dilating catheter also has the limiting part of the movement limiting described mobile installing component on described restriction direction,
Described limiting part is configured between described first installation site and described second installation site.
4. dilating catheter according to claim 3, is characterized in that,
Described limiting part is configured between described mobile installation portion and the link position of described expansion member between described first installation site and described second installation site.
5. the dilating catheter according to claim 3 or 4, is characterized in that,
Described dilating catheter has multiple elongated member,
Described multiple elongated member is circumferentially being connected to described mobile installing component with the interval of approximate equality relative to described mobile installing component centered by the central axis of described conduit axle.
6. the dilating catheter according to claim 3 or 4, is characterized in that,
Described dilating catheter also possesses force application part, the moving direction force of described mobile installing component when this force application part is replied to described elongated member described mobile installing component.
7. dilating catheter according to claim 6, is characterized in that,
Described force application part is configured between described limiting part and described mobile installing component.
8. dilating catheter according to any one of claim 1 to 4, is characterized in that,
The action of the Accompanying Deformation of described elongated member time expansion relative to described extended region in described specific installation site and be limited mobile.
9. dilating catheter according to any one of claim 1 to 4, is characterized in that,
Described conduit axle is formed with the inner chamber for fluid circulation,
Described expansion member has the extended region formed with the space of described inner space, and is configured to expand under the effect of the pressure of described fluid.
10. dilating catheter according to any one of claim 1 to 4, is characterized in that,
Described dilating catheter also possesses the elastic mounting part being formed with elasticity installation site, and this elasticity installation site is the installation site of the side, non-described specific installation site in described first installation site and described second installation site,
In described elastic mounting part, make described elasticity installation site near described specific installation site when described expansion member expansion by the elongation of described elastic mounting part, and make described elasticity installation site away from described specific installation site when described expansion member is shunk by the contraction of described elastic mounting part.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2010/064725 WO2012029109A1 (en) | 2010-08-30 | 2010-08-30 | Dilatation catheter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103052422A CN103052422A (en) | 2013-04-17 |
| CN103052422B true CN103052422B (en) | 2015-07-01 |
Family
ID=45772250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080068391.0A Active CN103052422B (en) | 2010-08-30 | 2010-08-30 | Dilatation Catheter |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5600745B2 (en) |
| CN (1) | CN103052422B (en) |
| WO (1) | WO2012029109A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IN2015DN00517A (en) * | 2012-10-01 | 2015-06-26 | Bard Inc C R | |
| JP5758029B1 (en) * | 2014-06-25 | 2015-08-05 | 日出夫 文山 | Body fluid flow non-blocking balloon catheter |
| JP6417192B2 (en) * | 2014-11-11 | 2018-10-31 | 株式会社ブリヂストン | Laminated assembly manufacturing method and stacked assembly manufacturing apparatus |
| CN107405473A (en) | 2015-04-10 | 2017-11-28 | 株式会社戈德曼 | Foley's tube |
| WO2016185995A1 (en) * | 2015-05-15 | 2016-11-24 | 二プロ株式会社 | Balloon catheter |
| CN110267702A (en) * | 2017-06-23 | 2019-09-20 | 株式会社戈德曼 | Foley's tube |
| CN107496009B (en) * | 2017-10-16 | 2023-11-28 | 广东博迈医疗科技股份有限公司 | Vascular plaque cutting device |
| CN110313984B (en) * | 2018-03-30 | 2022-03-29 | 上海微创电生理医疗科技股份有限公司 | Ablation catheter and ablation system |
| JP7305152B2 (en) * | 2019-03-08 | 2023-07-10 | 株式会社Shinsei | balloon catheter |
| WO2020195697A1 (en) * | 2019-03-28 | 2020-10-01 | 株式会社カネカ | Balloon catheter |
| CN113877046B (en) * | 2021-11-18 | 2023-05-12 | 科塞尔医疗科技（苏州）有限公司 | Balloon catheter with protruding member |
| WO2024014249A1 (en) * | 2022-07-11 | 2024-01-18 | 株式会社グッドマン | Balloon catheter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5628746A (en) * | 1989-01-18 | 1997-05-13 | Applied Medical Resources Corporation | Dilatation catheter assembly with cutting element and method of using the same |
| US5967984A (en) * | 1995-06-30 | 1999-10-19 | Boston Scientific Corporation | Ultrasound imaging catheter with a cutting element |
| CN1642593A (en) * | 2002-02-14 | 2005-07-20 | 阿万泰克脉管公司 | Balloon catheter for creating a longitudinal channel in a lesion and method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2082621C (en) * | 1990-05-11 | 2002-07-09 | Ralph V. M. D. Clayman | Dilatation catheter assembly with cutting element |
| JP2008206702A (en) * | 2007-02-26 | 2008-09-11 | Nipro Corp | Catheter balloon |
| JP5002417B2 (en) * | 2007-11-02 | 2012-08-15 | 株式会社グツドマン | Balloon catheter |
-
2010
- 2010-08-30 CN CN201080068391.0A patent/CN103052422B/en active Active
- 2010-08-30 JP JP2012531570A patent/JP5600745B2/en active Active
- 2010-08-30 WO PCT/JP2010/064725 patent/WO2012029109A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5628746A (en) * | 1989-01-18 | 1997-05-13 | Applied Medical Resources Corporation | Dilatation catheter assembly with cutting element and method of using the same |
| US5967984A (en) * | 1995-06-30 | 1999-10-19 | Boston Scientific Corporation | Ultrasound imaging catheter with a cutting element |
| CN1642593A (en) * | 2002-02-14 | 2005-07-20 | 阿万泰克脉管公司 | Balloon catheter for creating a longitudinal channel in a lesion and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2012029109A1 (en) | 2013-10-28 |
| CN103052422A (en) | 2013-04-17 |
| JP5600745B2 (en) | 2014-10-01 |
| WO2012029109A1 (en) | 2012-03-08 |
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