WO2020012851A1 - バルーンカテーテル - Google Patents
バルーンカテーテル Download PDFInfo
- Publication number
- WO2020012851A1 WO2020012851A1 PCT/JP2019/023089 JP2019023089W WO2020012851A1 WO 2020012851 A1 WO2020012851 A1 WO 2020012851A1 JP 2019023089 W JP2019023089 W JP 2019023089W WO 2020012851 A1 WO2020012851 A1 WO 2020012851A1
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- WO
- WIPO (PCT)
- Prior art keywords
- balloon
- protrusion
- straight pipe
- protruding portion
- region
- 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
- A61M25/1002—Balloon catheters characterised by balloon shape
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
-
- 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
- A61M25/104—Balloon catheters used for angioplasty
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22001—Angioplasty, e.g. PCTA
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22051—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22051—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation
- A61B2017/22065—Functions of balloons
-
- 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
- A61M25/1002—Balloon catheters characterised by balloon shape
- A61M2025/1004—Balloons with folds, e.g. folded or multifolded
-
- 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
-
- 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
- A61M2025/1084—Balloon catheters with special features or adapted for special applications having features for increasing the shape stability, the reproducibility or for limiting expansion, e.g. containments, wrapped around fibres, yarns or strands
-
- 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
- A61M2025/1086—Balloon catheters with special features or adapted for special applications having a special balloon surface topography, e.g. pores, protuberances, spikes or grooves
-
- 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
- A61M2025/109—Balloon catheters with special features or adapted for special applications having balloons for removing solid matters, e.g. by grasping or scraping plaque, thrombus or other matters that obstruct the flow
-
- 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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/02—General characteristics of the apparatus characterised by a particular materials
- A61M2205/0216—Materials providing elastic properties, e.g. for facilitating deformation and avoid breaking
Definitions
- the present disclosure relates to a balloon catheter.
- balloon catheters have been used in treatments such as PTA (percutaneous coronary angioplasty) and PTCA (percutaneous coronary angioplasty) (for example, see Patent Document 1).
- the balloon catheter is provided with a balloon which can be inflated and deflated on the distal side.
- a balloon catheter a balloon is introduced in a contracted state into a stenotic or occluded area due to a lesion or the like generated in a blood vessel, and then the balloon is inflated to expand the area.
- Balloon catheters generally require pressure resistance for the balloon.
- the balloon is inflated by applying a high pressure to the balloon, so in consideration of such a case, the balloon is required to have higher pressure resistance.
- the present disclosure has been made in view of the above circumstances, and it is a main object of the present disclosure to provide a balloon catheter capable of improving pressure resistance while suppressing a decrease in permeability of a balloon in a body. is there.
- a balloon catheter includes a balloon formed of a membrane having a predetermined thickness, and the balloon has an inflatable and deflated inflatable and deflated portion.
- the film portion is provided with a linear protrusion projecting in the thickness direction and extending along the surface of the film portion, and the balloon in the thickness direction is provided as the protrusion.
- the linear portion in the inflation / deflation portion of the balloon, the linear portion is provided in the film portion forming the balloon.
- the membrane portion can be reinforced in the expansion / contraction portion.
- the membrane portion since the inner protruding portion that protrudes inside the balloon is provided as the protruding portion, the membrane portion can be reinforced by the inner protruding portion while suppressing an increase in the outer diameter of the balloon. This makes it possible to improve the pressure resistance of the balloon while suppressing a decrease in the permeability of the balloon in the body.
- the inflation / deflation portion is provided on both sides of the straight tube portion having the largest diameter when inflated and the straight tube portion in the axial direction of the balloon.
- a pair of tapered portions whose diameters are reduced toward the side away from the straight pipe portion, wherein the straight tube portion and the respective tapered portions each include the protruding portion provided on the film portion;
- an outer protruding portion protruding outside the balloon is provided as the protruding portion, and at least one of the tapered portions is provided with the inner protruding portion as the protruding portion.
- the membrane portion can be reinforced in substantially the entire region of the expansion / contraction portion. Therefore, the pressure resistance of the balloon can be suitably increased.
- the straight tube portion is provided with the outer protrusion as the protrusion, the outer protrusion can be pressed against the wall of the body when the balloon is inflated. This allows the outer protrusion to function as a non-slip when the balloon is inflated.
- the inner protruding portion is provided at least in a tapered portion on the distal end side among the tapered portions.
- the inner protruding portion is provided at the tapered portion on the balloon distal end side, so that the outer diameter of the tapered portion on the balloon distal end side can be suppressed from increasing. Thereby, it is possible to suitably suppress a decrease in the permeability when introducing the balloon into the body.
- the inside protruding portion is provided on both of the tapered portions.
- the inner protruding portion is provided in each of the tapered portions, it is possible to suppress an increase in the outer diameter of each tapered portion. Thereby, it is possible to further suppress the decrease in the permeability when introducing the balloon into the body. In addition, in this case, it is possible to preferably suppress a decrease in the permeability when the balloon is moved to the proximal end side, such as when the balloon is pulled out from the body.
- a balloon catheter according to a fifth disclosure is the balloon catheter according to any one of the second to fourth disclosures, wherein the protrusion of the straight pipe portion and the protrusion of each of the tapered portions extend along the surface of the membrane portion.
- the balloon extends in the axial direction.
- both the protruding portion of the straight pipe portion and the protruding portion of each tapered portion extend in the axial direction of the balloon along the surface of the membrane portion, the inflation of the balloon (specifically, the inflation / deflation portion) is performed. Occasionally, the balloon can be suppressed from extending in the axial direction. This makes it easier to keep the balloon length constant when the balloon is inflated.
- a balloon catheter according to a sixth disclosure is the balloon catheter according to the fifth disclosure, wherein the protrusion of the straight pipe portion extends over the entire area of the straight pipe portion in the axial direction, and the protrusion of each of the tapered portions. Extends over the entire area in the axial direction at each tapered portion, and both the protruding portion of the straight pipe portion and the protruding portion of each tapered portion are arranged at the same position in the circumferential direction of the balloon. Have been.
- the protruding portion extends over the entire region in the axial direction of the balloon in each of the straight pipe portion and each tapered portion.
- the straight pipe portion and the projecting portions of the respective tapered portions are arranged at the same position in the balloon circumferential direction, the projecting portions are continuously arranged without interruption over the entire axial direction of the inflating and deflating portion. .
- the expansion of the balloon in the axial direction can be further suppressed when the balloon is inflated, so that the balloon length can be more easily kept constant when the balloon is inflated.
- FIG. 1 is a schematic overall side view showing the configuration of a balloon catheter. It is a side view of a balloon and its circumference in an inflated state, and shows a balloon and an outer tube in the state of a longitudinal section.
- (A) is a side view showing the configuration of the balloon and its periphery in the inflated state
- (b) is a cross-sectional view taken along the line AA of (a)
- (c) is a cross-sectional view taken along the line BB of (a).
- (d) is CC sectional view taken on the line of (a).
- A) is a side view showing the configuration of the balloon and its periphery in a deflated state
- (b) is a cross-sectional view taken along the line DD of (a).
- FIG. 1 is a schematic overall side view showing the configuration of the balloon catheter 10.
- the balloon catheter 10 includes a catheter body 11, a hub 12 attached to a proximal end (proximal end) of the catheter body 11, and a distal side (distal end side) of the catheter body 11. And a balloon 13 attached to the camera.
- the catheter body 11 includes an outer tube 15 and an inner tube 16 inserted inside the outer tube 15.
- the outer tube 15 is formed of a resin material, for example, a polyamide elastomer.
- the outer tube 15 has a proximal end joined to the hub 12 and a distal end joined to the balloon 13. Further, the outer tube 15 has a lumen 15a (see FIG. 2) extending throughout the entire area in the axial direction. The lumen 15a communicates with the hub 12 and the balloon 13.
- the outer tube 15 may be formed by joining a plurality of tubes arranged in the axial direction with each other.
- the tube on the proximal end side is formed of a metal material such as Ni—Ti alloy or stainless steel
- the tube on the distal end side is formed of a resin material such as polyamide elastomer.
- the inner tube 16 is formed of a resin material, for example, a polyamide elastomer.
- the inner tube 16 has a lumen 16a (see FIG. 2) extending inside the entire tube in the entire axial direction.
- the base end of the inner tube 16 is joined to an intermediate position in the axial direction of the outer tube 15, and a portion of the distal end side extends toward the distal end side from the outer tube 15.
- the balloon 13 is provided so as to cover the extended area in the inner tube 16 from the outside.
- the lumen 15a of the outer tube 15 functions as a fluid lumen through which a compressed fluid flows when the balloon 13 is inflated or deflated. Further, the lumen 16a of the inner tube 16 functions as a guide wire lumen through which the guide wire G is inserted.
- the proximal opening 21 of the lumen 16a is located at an intermediate position in the axial direction of the balloon catheter 10. Therefore, the balloon catheter 10 is a so-called RX type catheter. Note that the proximal opening 21 of the lumen 16a may be at the proximal end of the balloon catheter 10, in which case the balloon catheter 10 is a so-called over-the-wire catheter.
- FIG. 2 is a side view of the balloon 13 and its surroundings in an inflated state, and shows the balloon 13 and the outer tube 15 in a longitudinal sectional state.
- 3A is a side view showing the configuration of the balloon 13 and its surroundings in the inflated state
- FIG. 3B is a cross-sectional view taken along the line AA of FIG. 3A
- FIG. 4B is a cross-sectional view taken along line B
- FIG. 4B is a cross-sectional view taken along line DD of FIG.
- the balloon 13 is provided so as to cover, from the outside, an extension region of the inner tube 16 that extends toward the distal end side from the outer tube 15. As shown in FIGS. 2 and 3A, the balloon 13 has a proximal end joined to the distal end of the outer tube 15 and a distal end joined to the distal end of the inner tube 16.
- the balloon 13 is formed of a thermoplastic polyamide elastomer.
- the balloon 13 may be formed of a thermoplastic resin other than the polyamide elastomer as long as the balloon 13 can be satisfactorily expanded and contracted with the supply and discharge of the fluid.
- it may be formed of polyethylene, polyethylene terephthalate, polypropylene, polyurethane, polyamide, polyimide, polyimide elastomer, silicon rubber, or the like.
- the balloon 13 is formed by a film portion 29 having a predetermined thickness.
- the balloon 13 has a joint at both ends joined to the catheter body 11, and an inflation / contraction portion provided between the joints for inflation and contraction.
- the balloon 13 has a proximal leg region 13a joined to the distal end of the outer tube 15, and a taper such that the inner diameter and the outer diameter of the balloon 13 are continuously increased toward the distal end.
- a proximal-side cone region 13b having a shape, a straight tube region 13c having the same inner diameter and outer diameter throughout the length direction and forming a maximum outer-diameter region of the balloon 13, and a balloon 13 extending toward the distal side.
- the base-side cone region 13b, the straight pipe region 13c, and the front-side cone region 13d form an expansion / contraction portion, and the base-side leg region 13a and the front-side leg region 13e are joints.
- the straight pipe region 13c corresponds to a “straight tube portion”, and the distal cone region 13d and the proximal cone region 13b each correspond to a “taper portion”.
- the balloon 13 When the compressed fluid is supplied into the balloon 13 through the lumen 15a of the outer tube 15, the balloon 13 is in an inflated state, a negative pressure is applied to the lumen 15a, and the compressed fluid is discharged from the balloon 13. Then, it is in a contracted state.
- the balloon 13 includes a plurality (three in this embodiment) of wings 25 formed in a contracted state. These wings 25 are provided at predetermined intervals (specifically, at equal intervals) in the circumferential direction of the balloon 13. Each wing 25 is formed so as to extend in the axial direction at the inflation / deflation portion of the balloon 13. In this case, each wing 25 extends across the base cone region 13b, the straight pipe region 13c, and the tip cone region 13d. When the balloon 13 is in the contracted state, these wings 25 are folded in the circumferential direction of the balloon 13 and are wound around the inner tube 16.
- a pair of contrast rings 23 are attached inside the balloon 13 in the inner tube 16.
- the imaging ring 23 is for improving the visibility of the balloon 13 under X-ray projection and for easily positioning the balloon 13 at a target treatment site.
- the membrane portion 29 forming the balloon 13 is provided with a projection that projects in the thickness direction and extends linearly along the surface of the membrane portion 29.
- the protrusions reinforce the membrane portion 29, thereby improving the pressure resistance of the balloon 13.
- the film portion 29 of the balloon 13 is provided with protrusions 31 to 33 that protrude in the thickness direction.
- These protruding portions 31 to 33 include a protruding portion 31 provided in the straight pipe region 13c of the balloon 13 and protruding portions 32 and 33 provided in the respective cone regions 13b and 13d. These projections 31 to 33 are all formed integrally with the film 29.
- the protruding portion 31 of the straight pipe region 13c protrudes outward (outer peripheral side) of the balloon 13 as shown in FIG.
- the protruding portion 31 extends in the axial direction of the balloon 13 along the outer surface of the membrane portion 29 (that is, the outer surface of the straight tube region 13c), and more specifically, extends over the entire region of the straight tube region 13c in the axial direction.
- the plurality of protrusions 31 are arranged at predetermined intervals (specifically, at equal intervals) in the circumferential direction of the balloon 13, and in the present embodiment, three protrusions 31 are arranged. Note that the protrusion 31 corresponds to the outer protrusion.
- the protrusion 31 has a triangular cross section (specifically, a cross section orthogonal to the longitudinal direction of the protrusion 31).
- the protruding portion 31 is arranged such that one top portion protrudes toward the outer peripheral side (radially outward) of the balloon 13.
- the protruding portion 31 does not necessarily have to have a triangular cross section, but may have another shape such as a semicircular shape or a square shape in a cross section.
- the protruding height of the protruding portion 31 (specifically, the protruding height from the outer surface of the film portion 29) is constant over substantially the entire area of the protruding portion 31 in the longitudinal direction. Specifically, the protrusion height of the protrusion 31 is constant over substantially the entire area of the protrusion 31 except for both ends in the longitudinal direction. At both ends in the longitudinal direction of the protruding portion 31, the end surfaces thereof are inclined with respect to the axial direction so as to smoothly connect to the outer peripheral surface of the base-side cone region 13 b and the outer peripheral surface of the distal-side cone region 13 d, respectively. Projection height is reduced.
- the protrusion height of the protrusion 31 may be constant over the entire area of the protrusion 31 in the longitudinal direction.
- the membrane portion 29 is provided with a protruding portion 31 protruding outside the balloon 13 (that is, an outer protruding portion). Not provided.
- the protrusion 32 of the base-side cone region 13b protrudes toward the inside (the inner peripheral side) of the balloon 13, as shown in FIG. ing.
- the protruding portion 32 extends in the axial direction of the balloon 13 along the inner surface of the film portion 29 (that is, the inner surface of the proximal-side cone region 13b). Extending across.
- the plurality of protrusions 32 are arranged at predetermined intervals (specifically, at equal intervals) in the circumferential direction of the balloon 13, and in the present embodiment, three protrusions 32 are arranged. These projections 32 are arranged at the same positions as the projections 31 in the straight pipe region 13c in the circumferential direction of the balloon 13. Note that the protruding portion 32 corresponds to an inner protruding portion.
- the protruding portion 32 has a semicircular shape whose cross section (specifically, a cross section orthogonal to the longitudinal direction of the protruding portion 32) is convex toward the inside of the balloon 13.
- the protruding portion 32 does not necessarily have to have a semicircular shape in a cross section, and may have another shape such as a triangular shape or a square shape in a cross section.
- the protruding height of the protruding portion 32 (specifically, the protruding height from the inner surface of the film portion 29) is constant over substantially the entire region in the longitudinal direction of the protruding portion 32. Specifically, the protruding height of the protruding portion 32 is constant over substantially the entire region of the protruding portion 32 except for the base end in the longitudinal direction. At the base end of the protruding portion 32, the end surface extends along the axial direction, thereby reducing the protruding height. The distal end of the projection 32 extends to the base end of the straight pipe region 13c, and is connected to the inner surface of the straight pipe region 13c. The height of the protrusion 32 may be constant over the entire length of the protrusion 32 in the longitudinal direction.
- the protrusion height of the protrusion 32 is greater than the thickness of the film 29. Further, the protrusion height of the protrusion 32 is the same (or substantially the same) as the protrusion height of the protrusion 31 in the straight pipe region 13c. However, the projecting height of the projecting portion 32 may be made larger or smaller than the projecting height of the projecting portion 31. Further, the height of the protrusion 32 is increased or decreased from the distal end side (the straight pipe region 13c side) to the proximal end side (the proximal leg region 13a side) of the protrusion 32. Is also good.
- the membrane portion 29 is provided with a projection 32 projecting inward of the balloon 13 (that is, an inside projection), while a projection projecting outside the balloon 13 (that is, an outside projection). Is not provided at all.
- the protruding portion 33 of the distal-side cone region 13d protrudes toward the inside (the inner peripheral side) of the balloon 13, as shown in FIG.
- the protruding portion 33 extends in the axial direction of the balloon 13 along the inner surface of the membrane portion 29 (that is, the inner surface of the distal-side cone region 13d), and more specifically, extends over the entire axial direction of the distal-side cone region 13d. Extending.
- the plurality of protrusions 33 are arranged at predetermined intervals (specifically, at equal intervals) in the circumferential direction of the balloon 13, and in the present embodiment, three protrusions 33 are arranged.
- Each of the protrusions 33 is arranged at the same position as each of the protrusions 31 of the straight pipe region 13c in the circumferential direction of the balloon 13, so that each of the protrusions 32 of the proximal-side cone region 13b is also arranged at the same position. I have. Note that the protruding portion 33 corresponds to an inner protruding portion.
- the protruding portion 33 has a semicircular shape whose cross section (specifically, a cross section orthogonal to the longitudinal direction of the protruding portion 33) is convex toward the inside of the balloon 13.
- the projecting portion 33 does not necessarily have to have a semicircular cross section, and may have other shapes such as a triangular shape or a quadrangular shape in a cross section.
- the protruding height of the protruding portion 33 (specifically, the protruding height from the inner surface of the film portion 29) is constant over substantially the entire region in the longitudinal direction of the protruding portion 33. Specifically, the protrusion height of the protrusion 33 is constant over substantially the entire region of the protrusion 33 except for the base end in the longitudinal direction. At the tip of the protruding portion 33, its end face extends along the axial direction, thereby reducing the protruding height.
- the base end of the projection 33 extends to the distal end of the straight pipe region 13c and is connected to the inner surface of the straight pipe region 13c.
- the height of the protrusion 33 may be constant over the entire length of the protrusion 33 in the longitudinal direction.
- the protrusion height of the protrusion 33 is greater than the thickness of the film 29.
- the protrusion height of the protrusion 32 is the same (or substantially the same) as the protrusion height of the protrusion 31 in the straight pipe region 13c and the protrusion height of the protrusion 32 in the base end cone region 13b.
- the protruding height of the protruding portion 33 may be larger or smaller than the protruding height of each protruding portion 31, 32.
- the height of the protrusion 33 may be increased or decreased from the base end side (the straight pipe region 13c side) of the protrusion 33 toward the distal end side (the distal end leg region 13e side). Good.
- the membrane portion 29 is provided with a protrusion 33 (that is, an inside protrusion) that protrudes inside the balloon 13, while a protrusion that protrudes outside the balloon 13 (that is, outside protrusion). Is not provided at all.
- each protruding portion 31 of the straight pipe region 13c is provided in a one-to-one relationship with the wing 25, and is disposed inside the fold of the wing 25, respectively.
- each protruding portion 31 is in a state of being covered from outside by the wing 25.
- a tubular parison as a base of the balloon 13 is manufactured by extrusion.
- the tubular parison is formed in a tubular shape, and a ridge extending in the axial direction is formed on an outer peripheral surface thereof.
- the ridges have a triangular cross section, and are formed in plurality (specifically, three) at equal intervals in the circumferential direction of the tubular parison.
- blow molding is performed under a predetermined condition using a mold having an accommodation space corresponding to the shape of the balloon 13.
- the tubular parison is heated and expanded in the mold (accommodation space).
- the tubular parison is in a biaxially stretched state, and thereafter, the both ends of the stretched tubular parison are cut to complete the manufacture of the balloon 13.
- each projection 31 is formed by blow molding in a portion where the straight pipe region 13c is formed in the tubular parison.
- a groove for accommodating the ridge is not formed in the mold at a portion corresponding to each of the cone regions 13b and 13d of the balloon 13. For this reason, at the time of blow molding, in the portion where the cone regions 13b and 13d are formed in the tubular parison, the respective ridges are pressed against the mold and are compressed (crushed).
- a groove for accommodating the ridge is also formed in a portion corresponding to each of the leg regions 13a and 13e of the balloon 13. For this reason, the protrusion which protrudes to the outer peripheral side also in the part which forms each leg area
- the manufacturing method of the balloon 13 is not necessarily limited to the above method, and another manufacturing method may be adopted.
- the guiding catheter is inserted into the sheath introducer inserted into the blood vessel, and the opening at the distal end of the guiding catheter is introduced to the coronary artery entrance.
- the guide wire G is inserted into the guiding catheter, and the inserted guide wire G is introduced from the entrance of the coronary artery through the treatment site such as a stenosis site to the peripheral site.
- the balloon catheter 10 is introduced into the guiding catheter along the guide wire G, and the balloon 13 is arranged at the treatment site while performing a push-pull operation.
- the balloon 13 is kept in a contracted state.
- each protruding portion 31 provided in the straight pipe region 13c of the balloon 13 is pressed against the blood vessel wall and bites into the blood vessel wall.
- each protruding portion 31 functions as a non-slip when the balloon 13 is inflated.
- the balloon catheter 10 is mainly passed through the blood vessel as described above, and is used for treating a blood vessel such as a coronary artery, a femoral artery, and a pulmonary artery. It is also applicable to "tubes" and "body cavities”.
- the protruding portion 31 protruding to the outside of the balloon 13 (hereinafter, also referred to as the outer protruding portion 31) is provided, the protruding portion 31 slides when the balloon 13 is inflated. It can function as a stop.
- each of the cone regions 13b and 13d is provided with a protruding portion 32 and 33 (hereinafter, also referred to as inner protruding portions 32 and 33) protruding inside the balloon 13, respectively, the respective cone regions 13b and 13d are provided.
- a protruding portion 32 and 33 hereinafter, also referred to as inner protruding portions 32 and 33
- the respective cone regions 13b and 13d are provided.
- the pressure resistance of the balloon 13 can be suitably increased while suppressing a decrease in the permeability of the balloon 13.
- the inner protruding portion 32 in the distal-side cone region 13d to suppress an increase in the outer diameter of the distal-side cone region 13d, it is possible to appropriately suppress a decrease in permeability when the balloon 13 is introduced into the body. can do.
- the inner protruding portion 33 is also provided in the base side cone region 13b to suppress an increase in the outer diameter of the region 13b, so that the balloon 13 is moved to the base side when the balloon 13 is pulled out from the body. It is also possible to suitably suppress a decrease in the permeability at the time of carrying out.
- the projecting portion 31 of the straight pipe region 13c and the projecting portions 32, 33 of the cone regions 13b, 13d both extend along the surface of the membrane portion 29 in the axial direction of the balloon 13, the balloon 13
- the expansion of the balloon 13 in the axial direction at the time of inflation of the contraction portion) can be suppressed. This makes it easier to keep the balloon length constant when the balloon 13 is inflated.
- the protruding portions 31 to 33 extend over the entire region of the balloon 13 in the axial direction. It is arranged at the same position in the direction. In this case, the respective protruding portions 31 to 33 are continuously arranged without interruption over the entire area in the axial direction of the expansion / contraction portion. Therefore, it is possible to further suppress the balloon 13 from expanding in the axial direction when the balloon 13 is inflated. This makes it easier to keep the balloon length more constant when the balloon 13 is inflated.
- the projections 31 to 33 are provided in the straight pipe region 13c and the cone regions 13b and 13d in the entire axial direction of the balloon 13 in the regions 13b to 13d. At least one of the parts 31 to 33 may be provided only in a part of the axial direction. Also in this case, if the protrusions 31 to 33 extend in the axial direction, the balloon 13 can be prevented from expanding in the axial direction when the balloon 13 is inflated. Can be easily maintained.
- the projections 31 to 33 of the straight pipe region 13c and the cone regions 13b and 13d are all provided so as to extend in the axial direction of the balloon 13 along the surface of the membrane portion 29. At least one of the protrusions 31 to 33 may be provided to extend in a direction different from the axial direction. For example, it is conceivable to provide any of the protrusions so as to extend in the circumferential direction of the balloon 13. Specifically, it is conceivable to provide the protrusion so as to extend over the entire circumferential direction of the balloon 13. In this case, the projection becomes an annular (annular) projection.
- any of the protrusions may be provided so as to extend spirally along the axial direction of the balloon 13.
- the film portion 29 can be reinforced, so that the pressure resistance of the balloon 13 can be improved.
- each of the projections 32, 33 of each of the cone regions 13b, 13d is an inner projection that projects inside the balloon 13, but only one of the projections 32, 33 is used.
- the inside projection may be used, and the other may be an outside projection that projects outside the balloon 13. Even in such a case, since the outer diameter of the cone region provided with the inner protruding portion can be suppressed from increasing, the pressure resistance of the balloon 13 should be improved while suppressing the decrease in the permeability. Can be.
- the projection 31 of the straight pipe region 13c and the projections 32, 33 of the cone regions 13b, 13d are arranged at the same position in the circumferential direction of the balloon 13.
- the portion 31 and the protruding portions 32, 33 of the cone regions 13b, 13d may be arranged at different positions in the circumferential direction of the balloon 13.
- the film portion 29 is provided with the protrusion 32 (corresponding to the inside protrusion) that protrudes inside the balloon 13, while the protrusion protrudes outside the balloon 13. (That is, the outer protrusion) was not provided at all.
- a protrusion that slightly protrudes to the outside of the balloon 13 along the protrusion 32 (inside protrusion) is formed on the film portion 29 of the film portion 29. It is also possible that they are formed.
- the protruding portion has an extremely small protruding height, it is possible to reinforce the membrane portion 29 while suppressing an increase in the outer diameter of the balloon 13. Note that the same applies to the tip-side cone region 13d.
- the protruding portion 31 protruding to the outside of the balloon 13 is provided in the straight pipe region 13c of the balloon 13 and the protruding portion 31 is used as a non-slip when the balloon 13 is inflated. Some do not have such a protruding portion 31 (non-slip). Therefore, in such a balloon having no anti-slip, an inner protruding portion protruding inside the balloon 13 may be provided in the straight pipe region 13c. Then, it is possible to suppress an increase in the outer diameter in the straight pipe region 13c in addition to the cone regions 13b and 13d. For this reason, it is possible to improve the pressure resistance while further suppressing the decrease in the permeability of the balloon.
Abstract
Description
Claims (6)
- 所定の厚みを有する膜部により形成されたバルーンを備え、そのバルーンは膨張及び収縮可能な膨張収縮部を有しているバルーンカテーテルにおいて、
前記膨張収縮部では、前記膜部に、厚み方向に突出しかつ前記膜部の表面に沿って延びている線状の突出部が設けられており、
前記突出部として、前記厚み方向における前記バルーンの内側に突出する内側突出部を有している、バルーンカテーテル。 - 前記膨張収縮部は、
膨張時に最も径が大きくなる直管部と、
前記バルーンの軸線方向における前記直管部を挟んだ両側に設けられ、前記直管部から離間する側に向けて縮径された一対のテーパ部とを有し、
前記直管部及び前記各テーパ部ではそれぞれ前記膜部に前記突出部が設けられ、
前記直管部では、前記突出部として、前記バルーンの外側に突出する外側突出部が設けられ、
前記各テーパ部のうち少なくともいずれかでは、前記突出部として、前記内側突出部が設けられている、請求項1に記載のバルーンカテーテル。 - 前記各テーパ部のうち少なくとも先端側のテーパ部に前記内側突出部が設けられている、請求項2に記載のバルーンカテーテル。
- 前記各テーパ部の両方に前記内側突出部が設けられている、請求項3に記載のバルーンカテーテル。
- 前記直管部の前記突出部と前記各テーパ部の前記突出部とはいずれも前記膜部の表面に沿って前記バルーンの軸線方向に延びている、請求項2乃至4のいずれか一項に記載のバルーンカテーテル。
- 前記直管部の前記突出部は、当該直管部において前記軸線方向の全域に亘って延びており、
前記各テーパ部の前記突出部は、各々のテーパ部において前記軸線方向の全域に亘って延びており、
前記直管部の前記突出部と前記各テーパ部の前記突出部とはいずれも前記バルーンの周方向において同じ位置に配置されている、請求項5に記載のバルーンカテーテル。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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CN201980035516.0A CN112203712B (zh) | 2018-07-09 | 2019-06-11 | 球囊导管 |
HRP20240144TT HRP20240144T1 (hr) | 2018-07-09 | 2019-06-11 | Balonski kateter |
KR1020207037569A KR102492421B1 (ko) | 2018-07-09 | 2019-06-11 | 풍선카테터(Balloon catheter) |
JP2020530044A JP6975858B2 (ja) | 2018-07-09 | 2019-06-11 | バルーンカテーテル |
EP19834109.1A EP3795200B1 (en) | 2018-07-09 | 2019-06-11 | Balloon catheter |
US17/137,638 US11679242B2 (en) | 2018-07-09 | 2020-12-30 | Balloon catheter |
Applications Claiming Priority (2)
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JP2018-130088 | 2018-07-09 | ||
JP2018130088 | 2018-07-09 |
Related Child Applications (1)
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US17/137,638 Continuation US11679242B2 (en) | 2018-07-09 | 2020-12-30 | Balloon catheter |
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WO2020012851A1 true WO2020012851A1 (ja) | 2020-01-16 |
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PCT/JP2019/023089 WO2020012851A1 (ja) | 2018-07-09 | 2019-06-11 | バルーンカテーテル |
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US (1) | US11679242B2 (ja) |
EP (1) | EP3795200B1 (ja) |
JP (1) | JP6975858B2 (ja) |
KR (1) | KR102492421B1 (ja) |
CN (1) | CN112203712B (ja) |
HR (1) | HRP20240144T1 (ja) |
WO (1) | WO2020012851A1 (ja) |
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WO2022102766A1 (ja) * | 2020-11-16 | 2022-05-19 | 株式会社カネカ | バルーンカテーテル用バルーン |
WO2022137764A1 (ja) | 2020-12-24 | 2022-06-30 | 株式会社カネカ | バルーンカテーテル用バルーン |
WO2022158100A1 (ja) * | 2021-01-21 | 2022-07-28 | 株式会社カネカ | バルーンカテーテル用バルーン |
WO2022196166A1 (ja) * | 2021-03-15 | 2022-09-22 | 株式会社カネカ | バルーンカテーテル用バルーン |
WO2022264744A1 (ja) * | 2021-06-17 | 2022-12-22 | 株式会社グッドマン | バルーンカテーテル |
WO2023032522A1 (ja) * | 2021-08-31 | 2023-03-09 | 株式会社グッドマン | バルーンカテーテル |
WO2023079906A1 (ja) * | 2021-11-08 | 2023-05-11 | 株式会社カネカ | バルーンカテーテル用バルーン |
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Also Published As
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US20210113821A1 (en) | 2021-04-22 |
CN112203712B (zh) | 2023-11-07 |
US11679242B2 (en) | 2023-06-20 |
JP6975858B2 (ja) | 2021-12-01 |
HRP20240144T1 (hr) | 2024-04-12 |
JPWO2020012851A1 (ja) | 2021-06-24 |
EP3795200B1 (en) | 2023-12-27 |
EP3795200A4 (en) | 2021-07-28 |
KR20210014143A (ko) | 2021-02-08 |
CN112203712A (zh) | 2021-01-08 |
KR102492421B1 (ko) | 2023-01-27 |
EP3795200A1 (en) | 2021-03-24 |
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