WO2006129419A1 - Balloon catheter - Google Patents

Balloon catheter Download PDF

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Publication number
WO2006129419A1
WO2006129419A1 PCT/JP2006/307255 JP2006307255W WO2006129419A1 WO 2006129419 A1 WO2006129419 A1 WO 2006129419A1 JP 2006307255 W JP2006307255 W JP 2006307255W WO 2006129419 A1 WO2006129419 A1 WO 2006129419A1
Authority
WO
WIPO (PCT)
Prior art keywords
balloon
catheter
check valve
catheter body
cylindrical
Prior art date
Application number
PCT/JP2006/307255
Other languages
French (fr)
Japanese (ja)
Inventor
Youichi Tamenori
Masatoshi Niunoya
Takashi Furukawa
Shouji Sakakiyama
Original Assignee
Sekisui Chemical Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sekisui Chemical Co., Ltd. filed Critical Sekisui Chemical Co., Ltd.
Publication of WO2006129419A1 publication Critical patent/WO2006129419A1/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M25/00Catheters; Hollow probes
    • A61M25/10Balloon catheters
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M25/00Catheters; Hollow probes
    • A61M25/10Balloon catheters
    • A61M2025/1043Balloon catheters with special features or adapted for special applications
    • A61M2025/1054Balloon catheters with special features or adapted for special applications having detachable or disposable balloons

Definitions

  • the present invention is used by being inserted into a living body for examinations and treatments, and after smoothly performing expansion of a stenosis, blocking of a hole formed in a living body cavity, tissue peeling, and the like.
  • the present invention relates to a balloon catheter that can be stably maintained for a long time.
  • the balloon catheter In order to treat the stenosis in the blood vessel, specifically, the balloon catheter is inserted into the blood vessel, and the balloon part of the balloon member is expanded to expand the stenosis of the blood vessel.
  • a balloon catheter In a surgical method for closing a hole formed in a blood vessel or used in a blood vessel, a balloon catheter is introduced at a position where the hole is formed in the blood vessel, and the balloon part of the noren member is expanded to expand the blood vessel. It is used to close the hole, or it is used for diagnosis and treatment such as expansion of stenosis and tissue detachment by introducing a Norne catheter into a living body cavity endoscopically.
  • the balloon member in a state where the balloon portion is inflated is separated from the catheter body force and placed in the living body cavity, and the separated balloon member is used to prevent the constricted portion of the living body cavity.
  • a balloon catheter that can maintain an expanded state or a closed state of a living body cavity for a long time has been proposed.
  • the forceps is in a state where the balloon portion is inflated. It is possible to introduce other devices into the channel, which is very useful in terms of expanding the range of diagnosis and treatment.
  • Patent Document 1 a balloon catheter having an in-vivo indwelling member at the tip is fused at or near the junction between the in-vivo indwelling member and the catheter body. Location and heating means for fusing the location to the location A balloon catheter is proposed.
  • the balloon catheter requires an electrode and a high-frequency current generator as its heating means, and the structure of the balloon catheter is of course complicated.
  • the problem is that the task of separating the lines is complicated.
  • Patent Document 1 Japanese Patent Publication No. 60-30225
  • the present invention is used by being inserted into a living body cavity for examination or treatment, and can smoothly expand a stenosis part, block a hole formed in the living body cavity, exfoliate a tissue, and the like.
  • a balloon catheter capable of stably maintaining the expanded state of the stenosis and the closed state of the living body cavity by placing the balloon member in the living body cavity while maintaining the inflated state of the balloon part. provide.
  • the balloon catheter of the present invention is a catheter body and a lane member that is detachably connected to the distal end portion of the catheter body, the distal end is closed and a proximal end portion is connected to the distal end portion of the catheter body.
  • a cylindrical portion connected in a separable manner, a balloon portion that is integrally provided on the outer peripheral surface of the cylindrical portion, and a balloon portion that can be expanded and contracted, and is formed in the cylindrical portion and supplied into the cylindrical portion.
  • a balloon member comprising a through hole for supplying a fluid to be supplied into the balloon part and a check valve for preventing leakage of the fluid from the balloon part is provided.
  • the balloon catheter includes a check valve disposed in the through hole of the cylindrical portion.
  • the balloon catheter is characterized by including a check valve disposed in the proximal end opening of the tubular portion.
  • the balloon catheter includes a check valve disposed in a through hole or a base end opening of the cylindrical portion and formed with a tongue-shaped elastic valve body force.
  • the balloon catheter is open toward the catheter body side, is formed of a bottomed cylindrical body having elasticity, and is opened by the fluid pressure supplied in the direction of the balloon portion.
  • a slit portion that is closed by a fluid pressure from the bottom is provided with a check valve formed on the bottomed cylindrical body.
  • a check valve made of a bottomed cylindrical body that opens toward the catheter body side and has elasticity, and a rod-like member that is integrally provided at the distal end of the catheter body.
  • a catheter main body having an outer diameter that can be inserted into the cylindrical portion of the balloon member, and a proximal end opening end surface of the cylindrical portion of the balloon member that is fitted on the catheter main body. And an outer cylinder that is in contact with the outer cylinder.
  • the balloon catheter includes a screw portion that is formed at the distal end portion of the catheter main body and the proximal end portion of the cylindrical portion of the balloon member and that can be screwed together.
  • the balloon catheter is provided with a protrusion and a locking groove that are provided at the outer peripheral portion of the distal end of the catheter body and the proximal end portion of the cylindrical portion of the balloon and that can be engaged and disengaged with each other. It is characterized by that.
  • the balloon catheter of the present invention is a catheter member and a lane member detachably connected to the distal end portion of the catheter body, the distal end is closed and the proximal end portion is at the distal end portion of the catheter body.
  • a cylindrical portion connected in a separable manner, a balloon portion that is integrally provided on the outer peripheral surface of the cylindrical portion, and a balloon portion that can be expanded and contracted, and is formed in the cylindrical portion and supplied into the cylindrical portion.
  • the balloon catheter includes a check valve disposed in the through hole of the tubular portion, the fluid that has flowed into the balloon portion of the balloon member leaks out of the balloon portion. It is possible to reliably maintain the inflated state of the balloon portion.
  • the balloon catheter when the balloon catheter is provided with a check valve disposed in the through hole or the base end opening of the tubular portion and formed with a tongue-shaped elastic valve body force, While it does not prevent the fluid from flowing into one part, it can reliably prevent the fluid that has flowed into the balloon part from leaking out of the balloon part, thus ensuring the inflated state of the balloon part. Can be maintained for a long time.
  • the balloon catheter is open toward the catheter body side, is formed of a bottomed cylindrical body having elasticity, and is opened by the fluid pressure supplied in the direction of the balloon portion.
  • the slit portion that is closed by the fluid pressure from the bottom is provided with a check valve formed in the bottomed cylindrical body.
  • the balloon member is separated from the catheter body and then flows into the balloon. It is possible to prevent the discharged fluid from flowing into the living body cavity, and to reduce the burden on the patient who has inserted the balloon catheter.
  • a check valve made of a bottomed cylindrical body that opens toward the catheter body and has elasticity, and a rod-like member that is integrally provided at the distal end of the catheter body.
  • the rod-shaped member penetrates the check valve Therefore, when the inside of the balloon portion and the inside of the catheter body communicate with each other and the check valve is closed by removing the stick-like member from the check valve, the stick-like member is used as the check valve.
  • the check valve is opened and closed by penetrating or removing it, and the check valve is reliably opened and closed.
  • a slit is formed in the hemispherical portion of the check valve.
  • the balloon and the catheter body communicate with each other.
  • the check valve is configured to close by removing the rod-shaped member from the slit, the check valve is opened and closed by removing the rod-shaped member. It is supposed to be.
  • a catheter main body having an outer diameter that can be inserted into the cylindrical portion of the balloon member, and a proximal end opening end surface of the cylindrical portion of the balloon member that is fitted to the catheter main body. If the rod-shaped member is withdrawn with the check valve force, the outer tube is brought into contact with the proximal end opening end surface of the balloon member so that the balloon member is in the pull-out direction of the rod-shaped member. Displacement can be reliably prevented. Therefore, the valve member can be reliably closed by withdrawing the rod-shaped member from the check valve, and the balloon member is prevented from moving when the rod-shaped member is withdrawn by the check valve force, so that the balloon member is removed from the living body cavity. It can be reliably placed in a predetermined position.
  • the balloon catheter includes a screw portion that is formed at the distal end portion of the catheter body and the proximal end portion of the cylindrical portion of the balloon member and that can be screwed together.
  • the balloon member is simply rotated by rotating the catheter body about its axis and releasing the screwing between the screw portions provided at the distal end portion of the catheter body and the proximal end portion of the cylindrical portion of the balloon member.
  • the catheter body force can be easily separated, and the diagnosis and treatment using the balloon force tail can be smoothly performed to reduce the burden on the patient.
  • the balloon catheter is provided with a protrusion and a locking groove which are provided at the outer peripheral portion of the distal end of the catheter main body and the proximal end portion of the cylindrical portion of the balloon and which can be engaged and disengaged with each other.
  • a protrusion and a locking groove which are provided at the outer peripheral portion of the distal end of the catheter main body and the proximal end portion of the cylindrical portion of the balloon and which can be engaged and disengaged with each other.
  • FIG. 1 is a longitudinal sectional view showing a balloon catheter of the present invention.
  • FIG. 2 is a partially cutaway perspective view showing a balloon catheter of the present invention.
  • FIG. 3 is a longitudinal sectional view showing an embodiment of the balloon catheter of FIG. 1 in use.
  • FIG. 4 is a longitudinal sectional view showing an embodiment of the balloon catheter in FIG. 1 in use.
  • FIG. 5 is a longitudinal sectional view showing an embodiment of the balloon catheter in FIG. 1 in use.
  • FIG. 6 is a longitudinal sectional view showing another example of a balloon member.
  • FIG. 7 is a schematic perspective view showing another example of the connection structure between the catheter body and the tubular portion.
  • FIG. 10 is a partially cutaway perspective view showing the balloon catheter of FIG. 9.
  • FIG. 11 is a longitudinal sectional view showing another example of the balloon catheter of the present invention.
  • FIG. 13 is a partially cutaway perspective view showing the balloon catheter of FIG. 11.
  • FIG. 15 is a perspective view showing a check valve.
  • FIG. 17 is a longitudinal sectional view showing another example of the balloon catheter of the present invention.
  • a balloon member 2 is detachably connected to the distal end portion of the catheter body 1.
  • This balloon member 2 has a bottomed cylindrical tubular portion 21 whose distal end portion is closed and a proximal end portion is detachably connected to the distal end portion of the catheter body 1, and an outer periphery of the tubular portion 21. It comprises an inflatable / deflated balloon portion 22 provided integrally on the surface.
  • the cylindrical portion 21 is formed in a bottomed cylindrical shape having a certain length in which the inner diameter matches the inner diameter of the catheter body 1 and the outer diameter matches the outer diameter of the catheter body 1.
  • a threaded portion 23 that can be screwed forward and backward to the threaded portion 12 of the catheter body 1 is formed on the inner peripheral surface of the proximal end portion of the tubular portion 21.
  • a noren portion 22 is provided in a body-like manner on the outer peripheral surface of the cylindrical portion 21.
  • the balloon portion 22 has a length slightly shorter than the length of the cylindrical portion 21 and has an elastic cylindrical body 24 having both ends opened. Both ends 24a, 24a of the cylindrical body 24 are hermetically fixed to the outer peripheral surface of the cylindrical portion 21 opposite to the entire end 24a. It is configured by Note that the method for fixing the both end portions 24a, 24a of the cylindrical body 24 to the outer peripheral surface of the cylindrical portion 21 is not particularly limited, and in addition to the method by thermal fusion, a method using an adhesive, a thread, etc. The method of tying up using can be mentioned.
  • the cylindrical portion 21 is provided with a circular through hole 26 penetrating between the inner and outer peripheral surfaces thereof, and is supplied into the cylindrical portion 21 through the through hole 26.
  • the fluid can be supplied into the balloon portion 22.
  • the balun portion 22 can be expanded and contracted by supplying a fluid through the through hole 26 or discharging the fluid from the space 25.
  • the material constituting the cylindrical body 24 is not particularly limited as long as it is elastically deformable.
  • natural rubber silicone rubber; urethane rubber; polyolefin elastomer, polystyrene elastomer.
  • Thermoplastic elastomers such as polyamide elastomers; Polyolefins such as polyethylene, polypropylene, ethylene a olefin copolymers such as ethylene propylene copolymers, propylene olefin resins, ethylene acetate butyl copolymers, etc. Examples thereof include rosin, soft polyvinyl chloride, polyurethane, polyisoprene and the like, and natural rubber, silicone rubber, and urethane rubber are preferable because the balloon part 22 can be easily expanded and contracted in the living body cavity.
  • examples of the fluid include gases such as air, and liquids such as water, physiological saline, and gel-like medicines, and means for supplying the fluid into the cylindrical portion 21 through the catheter body 1.
  • a fluid adjusting tool such as a syringe barrel, which has been conventionally used, is used.
  • a tongue-shaped elastic valve element 27 having a size capable of completely closing the through hole 26 is provided as a check valve.
  • the tongue-shaped elastic valve element 27 has a base end portion fixed to the outer opening end surface of the through hole 26, and a portion other than the base end portion can be displaced inward and outward by elastic deformation. It has been.
  • the elastic valve element 27 When the internal pressure in the space portion 25 of the balloon portion 22 is greater than the internal pressure of the cylindrical portion 21, the elastic valve element 27 is caused to pass through the through-hole 26 by the fluid pressure in the space portion 25 of the balloon portion 22. It is comprised so that it may be in the state closed completely.
  • Polyolefin resins such as coalescence, propylene ⁇ -olefin copolymer, ethylene acetate butyl copolymer, polyester resins such as polyethylene terephthalate, polychlorinated butyl, polyurethane, polyamide, polyimide, natural rubber, silicone rubber And elastomers such as urethane rubber, polyolefin-based elastomer, polystyrene-based elastomer, and polyamide-based elastomer.
  • the supply of fluid into the tubular portion 21 through the lumen 11 of the catheter body 1 is stopped.
  • the pressure in the space portion 25 of the balloon portion 22 is The elastic valve element 27 is pressed against the outer opening end face of the through hole 26 by the internal pressure of the space part 25 of the balloon part 22 due to the pressure higher than the internal pressure, and the through hole 26 is completely closed.
  • the fluid force that has flowed into the S is reliably prevented from leaking out of the balloon portion 22, and the inflated state of the balloon portion 22 is reliably maintained.
  • the balloon member 2 placed in the living body cavity B leaks out of the space portion 25 of the fluid force balloon portion 22 press-fitted into the space portion 25 of the balloon portion 22. Therefore, the balloon portion 22 can stably maintain the inflated state for a long time, and can reliably expand the constricted portion B1 of the living body cavity B.
  • the cylindrical portion 21 is formed in a bottomed cylindrical shape, and a cylindrical body 24 having both ends opened is fitted into and integrated with the cylindrical portion 21.
  • the cylindrical cylindrical portion 31 having both ends opened has a length slightly longer than the length of the cylindrical portion 31 as shown in FIG.
  • each of the distal end portion 32a and the proximal end opening portion 32b of the bottomed cylindrical body 32 is provided.
  • the balloon portion 22 may be integrally attached to the outer peripheral surface of 21.
  • the configurations other than those described above are the same as the balloon catheter A shown in FIGS. Therefore, the description is omitted.
  • the catheter body 1 and the balloon member 2 can be connected and separated from each other at the opposite end portions of the catheter body 1 and the balloon member 2 by screw portions 12, 23.
  • an annular lock having a constant width and a constant depth on the inner peripheral surface of the proximal end opening of the cylindrical portion 21 is illustrated.
  • the catheter body 1 is formed with a groove 21a and an insertion groove 2lb having a constant width and a constant depth that communicates in a state orthogonal to the locking groove 21a and opens at the proximal end surface of the tubular portion 21.
  • a protrusion 13 that can be inserted into the insertion groove 2 lb and can be detachably engaged with the engagement groove 21a may be provided on the outer peripheral surface of the front end. 7 and 8, the balloon portion 22 is omitted for convenience of explanation.
  • the distal end portion of the catheter body 1 is inserted into the proximal end opening of the tubular portion 21 with the protrusion 13 of the catheter body 1 aligned with the insertion groove 21b of the tubular portion 21, and the catheter is inserted.
  • the protrusion 13 of the main body 1 is positioned in the locking groove 21a of the cylindrical portion 21, and in this state, the catheter body 1 is rotated by a predetermined angle around its axis.
  • the protrusion 13 of the catheter body 1 is detachably locked in the locking groove 21a of the cylindrical portion 21 so that the catheter body 1 and the balloon member 2 are detachably connected. Since configurations other than those described above are the same as those of the balloon catheter A shown in FIGS. 1 to 5, the same reference numerals are given and description thereof is omitted.
  • the cylindrical portion 21 A check valve may be provided at the proximal end opening.
  • an annular valve seat 41 is provided on the inner peripheral surface of the base end opening of the cylindrical portion 21 over the entire circumference, and the upper end of the inner surface of the valve seat 41 is By attaching the upper end edge of the tongue-shaped elastic valve element 42 having a size capable of completely closing the opening of the valve seat 41, a check valve is provided at the proximal opening of the tubular part 21. It is arranged.
  • the elastic valve body 42 causes the upper end fixing portion to be moved by the fluid pressure acting in the tubular portion 21. As a fulcrum, it is elastically bent by inward force and opens the proximal end opening of the tubular portion 21.
  • the fluid supplied into the tubular part 21 through the lumen 11 of the catheter body 1 is tubular.
  • the balloon part 22 is inflated by flowing into the space part 25 of the balloon part 22 through the through hole 26 of the part 21.
  • the material of the elastic valve element 42 is not particularly limited as long as it is elastically deformable, and the same material as the elastic valve element 27 of the balloon catheter A shown in Figs. 1 to 5 is used. be able to. Further, the same structure as the balloon catheter A shown in FIG. 1 to FIG.
  • the structure shown in FIGS. 11 to 13 may be used as the structure in which the check valve is provided in the proximal end opening of the cylindrical portion 21.
  • the check valve 5 includes an elastic bottomed cylindrical body 50 having an outer diameter that matches the inner diameter of the cylindrical portion 21 and a bottom portion that is formed in a convex arc shape. With the body 50 facing the proximal end opening toward the catheter body 1 side, the base end outer peripheral surface of the bottomed cylindrical body 50 is completely and airtightly fixed to the base end inner peripheral surface of the cylindrical portion 21. It ’s all together.
  • the bottom outer peripheral surface of the bottomed tubular body 50 is cut in the radial direction of the bottomed tubular body 50 to open it by the fluid pressure supplied to the balloon portion 2 side, and the balloon
  • the check valve 5 is configured by providing the bottomed cylindrical body 50 with a single slit 51 that is closed by the fluid pressure on the part 22 side.
  • the material of the bottomed cylindrical body 50 is not particularly limited as long as it is elastically deformable, and is the same material as that of the elastic valve body 27 of the balloon catheter A shown in Figs. Can be used.
  • the same reference numerals are given to the same structure as that of the none catheter A shown in FIGS. 1 to 5, and the description thereof is omitted.
  • the check valve 6 has elasticity that the outer diameter matches the inner diameter of the cylindrical portion 21 and the bottom portion is formed in a convex arc shape.
  • the bottomed tubular body 60 has a force, and the bottomed tubular body 60 is in a state where the base end opening is directed toward the catheter body 1 side.
  • the 21 base end inner peripheral surfaces are firmly and hermetically bonded together.
  • a slit 61 that penetrates between the both surfaces of the bottomed cylindrical body 60 is formed.
  • the catheter body 1 ′ is formed in a long cylindrical shape whose outer diameter matches the inner diameter of the cylindrical portion 21 of the balloon member 2.
  • a rod-like member 14 having a predetermined length is projected from the distal end portion of the catheter body 1 ′.
  • the rod-like member 14 is formed in a state where a passage portion 14a opened at the distal end surface thereof communicates with the lumen 11 of the catheter body 1 ′.
  • the distal end portion of the catheter body is inserted into the proximal end opening of the tubular portion 21 of the balloon member 2, and the rod-like member 14 of the catheter body 1 is inserted into the slit portion 61 of the check valve 6.
  • the check valve 6 is open, and the space portion 25 of the balloon portion 22 of the balloon member 2 and the lumen 11 of the catheter body 1 are connected to the rod-like member 14. It is in a state of communication through.
  • the catheter body 1 when the catheter body is pulled out from the inside of the proximal end opening of the cylindrical portion 21 of the balloon member 2 and the rod-like member 14 of the catheter body is also pulled out of the slit portion 61 force of the check valve 6, the check valve 6
  • the slit portion 61 is configured to be automatically closed by the fluid pressure in the balloon portion 22 of the balloon member 2.
  • the catheter body 1 ' has an elongated shape having an inner diameter that matches the outer diameter of the catheter body 1' and an outer diameter that matches the outer diameter of the tubular portion 21 of the balloon member 2.
  • the outer cylinder 7 is fitted.
  • the outer cylinder 7 is configured to be displaceable relative to the catheter body 1 ′ in the length direction.
  • the outer cylinder 7 is in such a state that its distal end opening end surface 71 is in full contact with the proximal end opening end surface 21a of the cylindrical portion 21 of the balloon member 2 so as to be separable over the entire circumference. Further, the proximal end portion of the catheter body 1 ′ protrudes from the proximal end opening of the outer cylinder 7, and the catheter body 1 ′ can be operated by grasping the proximal end protruding portion of the catheter body 1. It is structured as follows.
  • the balloon member 22 of the balloon member 2 of the balloon force Tetel A is in a contracted state, and then the non-member member 2 of the balloon catheter A is inserted and positioned in the constricted portion of the living body cavity.
  • the catheter Pull out the body 1 'toward the base end. Then, the rod-like member 14 of the catheter body 1 ′ is also pulled out from the slit portion 61 of the check valve 6, and the slit portion 61 of the check valve 6 is automatically closed by the fluid pressure of the balloon portion 22, so that the check valve 6 is Closed state. Therefore, the balloon portion 22 of the balloon member 2 is reliably maintained in its expanded state.
  • the catheter body 1 ' is pulled out from the tubular portion 21 of the balloon member 2, the distal end opening end surface 71 of the outer tube 7 is in contact with the proximal end opening end surface 21a of the tubular portion 21 of the balloon member 2. . Accordingly, the balloon member 2 is displaced in the pulling direction of the catheter body 1 due to frictional friction between the catheter body and the cylindrical portion 21 facing each other and the pulling resistance of the rod-shaped member 14 from the slit portion 61 of the check valve 6. This can be prevented by the outer cylinder 7, and the balloon member 2 can be reliably positioned at a predetermined position. Then, the catheter body 1 ′ and the outer tube 7 can be pulled out and taken out from the living body cavity, and the next treatment or examination can be continued.
  • the base end portion of the cylindrical portion 21 of the balloon member 2 is arranged.
  • a cylindrical check valve storage portion 8 may be fitted and integrated, and the check valve 6 may be integrally provided in the check valve storage portion 8.
  • the check valve 6 has an elastic bottom with an outer diameter that matches the inner diameter of the check valve storage portion 8 and whose bottom is formed in a convex arc shape.
  • the bottomed cylindrical body 60 is formed with the base end opening directed toward the catheter body 1 and the base end outer peripheral surface of the bottomed cylindrical body 60 is set to the check valve storage portion 8. It is firmly and airtightly bonded to the inner peripheral surface of the whole.
  • a single slit 61 is formed in the bottom of the bottomed cylindrical body 60 so as to penetrate between both surfaces. Note that, in the connection portion between the tubular portion 21 of the balloon member 2 and the check valve storage portion 8, the opposing surfaces of the tubular portion 21 and the check valve storage portion 81 are integrated in an airtight manner.
  • the distal end opening end surface 71 of the outer cylinder 7 is in contact with the proximal end opening end surface 81 of the check valve storage portion 8 so as to be separable over the entire circumference.
  • Structural portions similar to those of the balloon catheter A shown in FIGS. 1 to 16 are denoted by the same reference numerals, and description thereof is omitted.
  • the force described when the slit portion 61 is formed in the check valve 6 does not form the slit portion 61 in the check valve 6, and the catheter body 1 ′
  • the rod-shaped member 14 has a sharp tip like an injection needle.
  • the check valve 6 is opened by passing the sharp end of the rod-shaped member 14 through the check valve 6, and the noren 22 and the inside of the catheter body are communicated via the rod-shaped member 14.
  • the check valve 6 may be automatically closed and closed.
  • the balloon catheter of the present invention is used by being inserted into a living body for examination or treatment, and after performing expansion of a stenosis, closing of a hole formed in a living body cavity, peeling of a thread and fabric, and the like. Therefore, it can be applied to the use of treatment and examination performed in a state where the state is stably maintained for a long time.

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  • Heart & Thoracic Surgery (AREA)
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Abstract

A balloon catheter capable of maintaining a narrowed section in an expanded state and a living body cavity in an inflated state by leaving a balloon member indwelled in the living body cavity. The balloon catheter A has a catheter body (1) and a balloon member (2) detachably connected to the catheter body (1). The balloon member (2) has a tubular section (21) whose forward end is closed and whose rear end is detachably connected to the forward end of the catheter body (1), an inflatable/deflatable balloon section (22) that is integrally installed on the outer peripheral surface of the tubular body (21), a through-hole (26) that is formed in the tubular section (21) and feeds fluid, fed into the tubular section (21), into the balloon section, and a check valve (27) for preventing leakage of the fluid from the inside of the balloon section (22).

Description

明 細 書  Specification
ノ レーン力テーテノレ  Nolane force Tete Nore
技術分野  Technical field
[0001] 本発明は、検査や治療のために生体内に挿入して用いられ、狭窄部の拡張、生体 腔に生じた孔の閉塞、組織の剥離などを円滑に行なった上でその状態を長時間に 亘つて安定的に維持し得るバルーンカテーテルに関する。  [0001] The present invention is used by being inserted into a living body for examinations and treatments, and after smoothly performing expansion of a stenosis, blocking of a hole formed in a living body cavity, tissue peeling, and the like. The present invention relates to a balloon catheter that can be stably maintained for a long time.
背景技術  Background art
[0002] 今日、カテーテルや内視鏡を用いた低侵襲治療法が広く用いられており、血管、気 管、消化管などの生体腔の狭窄部の拡張や組織の剥離を行うことを目的として各種 バルーンカテーテルが提案され用いられて 、る。  [0002] Today, minimally invasive treatment methods using catheters and endoscopes are widely used for the purpose of dilating stenosis of tissue cavities such as blood vessels, trachea, and gastrointestinal tract, and tissue detachment. Various balloon catheters have been proposed and used.
[0003] そして、上記バルーンカテーテルは、具体的には、血管内の狭窄部を治療するた めに血管内に挿入してバルーン部材のバルーン部を膨張させて血管の狭窄部を拡 張させるのに用いられたり、血管に生じた孔を閉塞するための手術方法において、バ ルーンカテーテルを血管内における孔が生じた箇所に導入し、ノ レーン部材のバル 一ン部を膨張させることによって血管の孔を閉塞するのに用いられたり、或いは、ノ ルーンカテーテルを経内視鏡的に生体腔内に導入し、狭窄部の拡張や組織剥離な どの診断や治療に用いられている。  [0003] In order to treat the stenosis in the blood vessel, specifically, the balloon catheter is inserted into the blood vessel, and the balloon part of the balloon member is expanded to expand the stenosis of the blood vessel. In a surgical method for closing a hole formed in a blood vessel or used in a blood vessel, a balloon catheter is introduced at a position where the hole is formed in the blood vessel, and the balloon part of the noren member is expanded to expand the blood vessel. It is used to close the hole, or it is used for diagnosis and treatment such as expansion of stenosis and tissue detachment by introducing a Norne catheter into a living body cavity endoscopically.
[0004] 更に、このようなバルーンカテーテルの一種として、バルーン部を膨張させた状態 のバルーン部材をカテーテル本体力 切り離して生体腔内に留置し、この切り離した バルーン部材によって、生体腔の狭窄部の拡張状態や生体腔の閉塞状態を長時間 に亘つて維持することができるバルーンカテーテルが提案されており、特に、内視鏡 を用いた治療においては、バルーン部を膨張させた状態にて、鉗子チャンネルに他 のデバイスを導入することが可能となり、診断、治療の幅が拡がる点で非常に有用な ものである。  [0004] Furthermore, as a kind of such a balloon catheter, the balloon member in a state where the balloon portion is inflated is separated from the catheter body force and placed in the living body cavity, and the separated balloon member is used to prevent the constricted portion of the living body cavity. A balloon catheter that can maintain an expanded state or a closed state of a living body cavity for a long time has been proposed. In particular, in the treatment using an endoscope, the forceps is in a state where the balloon portion is inflated. It is possible to introduce other devices into the channel, which is very useful in terms of expanding the range of diagnosis and treatment.
[0005] このようなバルーンカテーテルとしては、特許文献 1に、先端に生体内留置部材を 有するバルーンカテーテルにお 、て、該生体内留置部材とカテーテル本体との接合 部又はその近傍に、溶断する箇所及び該箇所に該箇所を溶断するための加熱手段 を設けてなるバルーンカテーテルが提案されて 、る。 [0005] As such a balloon catheter, in Patent Document 1, a balloon catheter having an in-vivo indwelling member at the tip is fused at or near the junction between the in-vivo indwelling member and the catheter body. Location and heating means for fusing the location to the location A balloon catheter is proposed.
[0006] し力しながら、上記バルーンカテーテルでは、その加熱手段として電極や高周波電 流発生装置を必要とし、バルーンカテーテルの構造が複雑になることは勿論のこと、 カテーテル本体力も生体内留置部材を切り離す作業が煩雑であるといった問題点が めつに。  [0006] However, the balloon catheter requires an electrode and a high-frequency current generator as its heating means, and the structure of the balloon catheter is of course complicated. The problem is that the task of separating the lines is complicated.
[0007] 特許文献 1:特公昭 60— 30225号公報  [0007] Patent Document 1: Japanese Patent Publication No. 60-30225
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0008] 本発明は、検査や治療のために生体腔内に挿入して用いられ、狭窄部の拡張、生 体腔に生じた孔の閉塞、組織の剥離などを円滑に行なうことができると共に、バル一 ン部材をそのバルーン部の膨張状態を維持させたまま生体腔内に留置することによ つて、狭窄部の拡張状態や生体腔の閉塞状態を安定的に維持することができるバル ーンカテーテルを提供する。 [0008] The present invention is used by being inserted into a living body cavity for examination or treatment, and can smoothly expand a stenosis part, block a hole formed in the living body cavity, exfoliate a tissue, and the like. A balloon catheter capable of stably maintaining the expanded state of the stenosis and the closed state of the living body cavity by placing the balloon member in the living body cavity while maintaining the inflated state of the balloon part. provide.
課題を解決するための手段  Means for solving the problem
[0009] 本発明のバルーンカテーテルは、カテーテル本体と、このカテーテル本体の先端 部に分離可能に接続されたノ レーン部材であって、先端が閉塞され且つ基端部が 上記カテーテル本体の先端部に分離可能に接続された筒状部と、この筒状部の外 周面に一体的に設けられた膨張、収縮自在なバルーン部と、上記筒状部に形成され 且つ上記筒状部内に供給される流体をバルーン部内に供給するための通孔と、上 記バルーン部内からの流体の漏出を防止するための逆止弁とからなるバルーン部材 とを備免て ヽることを特徴とする。  [0009] The balloon catheter of the present invention is a catheter body and a lane member that is detachably connected to the distal end portion of the catheter body, the distal end is closed and a proximal end portion is connected to the distal end portion of the catheter body. A cylindrical portion connected in a separable manner, a balloon portion that is integrally provided on the outer peripheral surface of the cylindrical portion, and a balloon portion that can be expanded and contracted, and is formed in the cylindrical portion and supplied into the cylindrical portion. A balloon member comprising a through hole for supplying a fluid to be supplied into the balloon part and a check valve for preventing leakage of the fluid from the balloon part is provided.
[0010] そして、上記バルーンカテーテルにおいて、筒状部の通孔に配設された逆止弁を 備えて 、ることを特徴とする。  [0010] The balloon catheter includes a check valve disposed in the through hole of the cylindrical portion.
[0011] 又、上記バルーンカテーテルにおいて、筒状部の基端開口部に配設された逆止弁 を備えて ヽることを特徴とする。  [0011] In addition, the balloon catheter is characterized by including a check valve disposed in the proximal end opening of the tubular portion.
[0012] 更に、上記バルーンカテーテルにおいて、筒状部の通孔又は基端開口部に配設さ れ、且つ、舌片形状の弾性弁体力 形成された逆止弁を備えていることを特徴とする [0013] そして、上記バルーンカテーテルにおいて、カテーテル本体側に向かって開口し、 弾性を有する有底筒状体からなり、且つ、バルーン部方向に供給される流体圧によ つて開口し且つバルーン部側からの流体圧によって閉止するスリット部が上記有底 筒状体に形成されてなる逆止弁を備えていることを特徴とする。 [0012] Further, the balloon catheter includes a check valve disposed in a through hole or a base end opening of the cylindrical portion and formed with a tongue-shaped elastic valve body force. Do [0013] In the balloon catheter, the balloon catheter is open toward the catheter body side, is formed of a bottomed cylindrical body having elasticity, and is opened by the fluid pressure supplied in the direction of the balloon portion. A slit portion that is closed by a fluid pressure from the bottom is provided with a check valve formed on the bottomed cylindrical body.
[0014] 又、上記バルーンカテーテルにおいて、カテーテル本体側に向かって開口し且つ 弾性を有する有底筒状体からなる逆止弁と、カテーテル本体の先端部に一体的に設 けられた棒状部材とを備えており、上記棒状部材が上記逆止弁を貫通することによつ てバルーン部内と上記カテーテル本体内とが連通する一方、逆止弁から棒状部材を 抜き去ることによって逆止弁が閉止することを特徴とする。  [0014] In the above balloon catheter, a check valve made of a bottomed cylindrical body that opens toward the catheter body side and has elasticity, and a rod-like member that is integrally provided at the distal end of the catheter body. When the rod-shaped member passes through the check valve, the balloon portion and the catheter body communicate with each other, and the check valve is closed by removing the rod-shaped member from the check valve. It is characterized by doing.
[0015] そして、上記バルーンカテーテルにおいて、逆止弁にスリット部が形成されており、 このスリット部に棒状部材を挿入することによってノ レーン部内とカテーテル本体内と が連通する一方、上記スリット部から棒状部材を抜き去ることによって逆止弁が閉止 することを特徴とする。  [0015] And, in the balloon catheter, a slit portion is formed in the check valve, and by inserting a rod-like member into the slit portion, the inside of the none portion and the inside of the catheter body communicate with each other. The check valve is closed by removing the rod-shaped member.
[0016] 更に、上記バルーンカテーテルにおいて、バルーン部材の筒状部内に挿入可能な 外径を有するカテーテル本体と、このカテーテル本体に被嵌され且つ上記バルーン 部材の筒状部の基端開口端面に当接する外筒とを備えていることを特徴とする。  [0016] Further, in the balloon catheter, a catheter main body having an outer diameter that can be inserted into the cylindrical portion of the balloon member, and a proximal end opening end surface of the cylindrical portion of the balloon member that is fitted on the catheter main body. And an outer cylinder that is in contact with the outer cylinder.
[0017] 又、上記バルーンカテーテルにお 、て、カテーテル本体の先端部とバルーン部材 の筒状部の基端部とに形成され、且つ、互いに螺合可能な螺子部を備えていること を特徴とする。  [0017] In addition, the balloon catheter includes a screw portion that is formed at the distal end portion of the catheter main body and the proximal end portion of the cylindrical portion of the balloon member and that can be screwed together. And
[0018] そして、上記バルーンカテーテルにおいて、カテーテル本体の先端外周部とバル ーンの筒状部の基端部とに設けられ、且つ、互いに係脱可能な突起及び係止溝を 備えて 、ることを特徴とする。  [0018] The balloon catheter is provided with a protrusion and a locking groove that are provided at the outer peripheral portion of the distal end of the catheter body and the proximal end portion of the cylindrical portion of the balloon and that can be engaged and disengaged with each other. It is characterized by that.
発明の効果  The invention's effect
[0019] 本発明のバルーンカテーテルは、カテーテル本体と、このカテーテル本体の先端 部に分離可能に接続されたノ レーン部材であって、先端が閉塞され且つ基端部が 上記カテーテル本体の先端部に分離可能に接続された筒状部と、この筒状部の外 周面に一体的に設けられた膨張、収縮自在なバルーン部と、上記筒状部に形成され 且つ上記筒状部内に供給される流体をバルーン部内に供給するための通孔と、上 記バルーン部内からの流体の漏出を防止するための逆止弁とからなるバルーン部材 とを備えて 、ることを特徴とするので、バルーン部材内に流体を流入させてバルーン 部を膨張させた状態を、カテーテル本体力 分離させた後も安定的に維持すること ができ、生体腔内の狭窄部の拡張状態、生体腔に生じた孔の閉塞状態、或いは、生 体腔の閉塞状態を長時間に亘つて安定的に維持し、生体の診断や治療を円滑に行 うことができる。 [0019] The balloon catheter of the present invention is a catheter member and a lane member detachably connected to the distal end portion of the catheter body, the distal end is closed and the proximal end portion is at the distal end portion of the catheter body. A cylindrical portion connected in a separable manner, a balloon portion that is integrally provided on the outer peripheral surface of the cylindrical portion, and a balloon portion that can be expanded and contracted, and is formed in the cylindrical portion and supplied into the cylindrical portion. A through hole for supplying a fluid to be fed into the balloon section, and A balloon member comprising a check valve for preventing leakage of fluid from the inside of the balloon portion, and the balloon portion is inflated by injecting fluid into the balloon member. Can be stably maintained even after the catheter body force is separated, and the expanded state of the constricted portion in the living body cavity, the closed state of the hole formed in the living body cavity, or the closed state of the living body cavity can be maintained for a long time. It can be maintained stably over time, and living body diagnosis and treatment can be performed smoothly.
[0020] そして、上記バルーンカテーテルにおいて、筒状部の通孔に配設された逆止弁を 備えている場合には、バルーン部材のバルーン部内に流入した流体がバルーン部 外に漏出するのを防止してバルーン部の膨張状態を確実に維持することができる。  [0020] When the balloon catheter includes a check valve disposed in the through hole of the tubular portion, the fluid that has flowed into the balloon portion of the balloon member leaks out of the balloon portion. It is possible to reliably maintain the inflated state of the balloon portion.
[0021] 更に、上記バルーンカテーテルにおいて、筒状部の基端開口部に配設された逆止 弁を備えて 、る場合には、ノ レーン部材をカテーテル本体力も分離した後にお 、て 、ノ レーン部材内に流入させた流体が生体腔内に流出するのを防止することができ 、ノ レーンカテーテルを挿入した患者の負担を軽減させることができる。  [0021] Further, in the above balloon catheter, in the case of including a check valve disposed in the proximal end opening portion of the tubular portion, after the lane member is also separated from the catheter body force, It is possible to prevent the fluid that has flowed into the lane member from flowing out into the living body cavity, and to reduce the burden on the patient who has inserted the lane catheter.
[0022] 又、上記バルーンカテーテルにおいて、筒状部の通孔又は基端開口部に配設され 、且つ、舌片形状の弾性弁体力 形成された逆止弁を備えている場合には、バル一 ン部内への流体の流入を妨げることがない一方、バルーン部内にー且、流入した流 体がバルーン部外に漏出するのを確実に防止することができ、バルーン部の膨張状 態を確実に長時間に亘つて維持することができる。  [0022] Further, when the balloon catheter is provided with a check valve disposed in the through hole or the base end opening of the tubular portion and formed with a tongue-shaped elastic valve body force, While it does not prevent the fluid from flowing into one part, it can reliably prevent the fluid that has flowed into the balloon part from leaking out of the balloon part, thus ensuring the inflated state of the balloon part. Can be maintained for a long time.
[0023] そして、上記バルーンカテーテルにおいて、カテーテル本体側に向かって開口し、 弾性を有する有底筒状体からなり、且つ、バルーン部方向に供給される流体圧によ つて開口し且つバルーン部側からの流体圧によって閉止するスリット部が上記有底 筒状体に形成されてなる逆止弁を備えて 、る場合には、バルーン部材をカテーテル 本体から分離した後にお 、て、バルーン内に流入させた流体が生体腔内に流出す るのを防止することができ、バルーンカテーテルを挿入した患者の負担を軽減させる ことができる。 [0023] In the balloon catheter, the balloon catheter is open toward the catheter body side, is formed of a bottomed cylindrical body having elasticity, and is opened by the fluid pressure supplied in the direction of the balloon portion. In this case, the slit portion that is closed by the fluid pressure from the bottom is provided with a check valve formed in the bottomed cylindrical body. In this case, the balloon member is separated from the catheter body and then flows into the balloon. It is possible to prevent the discharged fluid from flowing into the living body cavity, and to reduce the burden on the patient who has inserted the balloon catheter.
[0024] 更に、上記バルーンカテーテルにおいて、カテーテル本体側に向かって開口し且 つ弾性を有する有底筒状体からなる逆止弁と、カテーテル本体の先端部に一体的に 設けられた棒状部材とを備えており、上記棒状部材が上記逆止弁を貫通することに よってバルーン部内と上記カテーテル本体内とが連通する一方、逆止弁から棒状部 材を抜き去ることによって逆止弁が閉止するように構成されている場合には、棒状部 材を逆止弁に貫通させ或いは抜き去ることによって逆止弁の開閉を行っており、逆止 弁の開閉を確実なものとしている。 [0024] Furthermore, in the above balloon catheter, a check valve made of a bottomed cylindrical body that opens toward the catheter body and has elasticity, and a rod-like member that is integrally provided at the distal end of the catheter body. The rod-shaped member penetrates the check valve Therefore, when the inside of the balloon portion and the inside of the catheter body communicate with each other and the check valve is closed by removing the stick-like member from the check valve, the stick-like member is used as the check valve. The check valve is opened and closed by penetrating or removing it, and the check valve is reliably opened and closed.
[0025] 又、上記バルーンカテーテルにおいて、逆止弁の半球状部にスリット部が形成され ており、このスリット部に棒状部材を挿入することによってバルーン部内とカテーテル 本体内とが連通する一方、上記スリット部から棒状部材を抜き去ることによって逆止弁 が閉止するように構成されている場合には、棒状部材の揷脱によって逆止弁の開閉 を行っており、逆止弁の開閉を確実なものとしている。  [0025] In the above balloon catheter, a slit is formed in the hemispherical portion of the check valve. By inserting a rod-like member into the slit, the balloon and the catheter body communicate with each other. When the check valve is configured to close by removing the rod-shaped member from the slit, the check valve is opened and closed by removing the rod-shaped member. It is supposed to be.
[0026] そして、上記バルーンカテーテルにおいて、バルーン部材の筒状部内に挿入可能 な外径を有するカテーテル本体と、このカテーテル本体に被嵌され且つ上記バル一 ン部材の筒状部の基端開口端面に当接する外筒とを備えている場合には、棒状部 材を逆止弁力 引き抜く時に、外筒をバルーン部材の基端開口端面に当接させて、 バルーン部材が棒状部材の引き抜き方向に変位するのを確実に防止することができ る。従って、棒状部材を逆止弁から引き抜いて弁体の閉止を確実に行うことができる と共に、棒状部材を逆止弁力 引き抜く際のバルーン部材の移動を防止して、バル 一ン部材を生体腔内の所定位置に確実に留置させることができる。  [0026] Then, in the balloon catheter, a catheter main body having an outer diameter that can be inserted into the cylindrical portion of the balloon member, and a proximal end opening end surface of the cylindrical portion of the balloon member that is fitted to the catheter main body. If the rod-shaped member is withdrawn with the check valve force, the outer tube is brought into contact with the proximal end opening end surface of the balloon member so that the balloon member is in the pull-out direction of the rod-shaped member. Displacement can be reliably prevented. Therefore, the valve member can be reliably closed by withdrawing the rod-shaped member from the check valve, and the balloon member is prevented from moving when the rod-shaped member is withdrawn by the check valve force, so that the balloon member is removed from the living body cavity. It can be reliably placed in a predetermined position.
[0027] 更に、上記バルーンカテーテルにお 、て、カテーテル本体の先端部とバルーン部 材の筒状部の基端部とに形成され、且つ、互いに螺合可能な螺子部を備えている場 合には、カテーテル本体をその軸芯回りに回転させて、カテーテル本体の先端部と バルーン部材の筒状部の基端部とに設けた螺子部同士の螺合を解除するだけで、 バルーン部材をカテーテル本体力も簡単に分離することができ、バルーン力テーテ ルを用いた診断及び治療を円滑に行って患者の負担を軽減することができる。  [0027] Furthermore, the balloon catheter includes a screw portion that is formed at the distal end portion of the catheter body and the proximal end portion of the cylindrical portion of the balloon member and that can be screwed together. The balloon member is simply rotated by rotating the catheter body about its axis and releasing the screwing between the screw portions provided at the distal end portion of the catheter body and the proximal end portion of the cylindrical portion of the balloon member. The catheter body force can be easily separated, and the diagnosis and treatment using the balloon force tail can be smoothly performed to reduce the burden on the patient.
[0028] 又、上記バルーンカテーテルにお 、て、カテーテル本体の先端外周部とバルーン の筒状部の基端部とに設けられ、且つ、互いに係脱可能な突起及び係止溝を備え ている場合には、カテーテル本体の先端外周部とバルーンの筒状部の基端部とに設 けた突起と係止溝との係止状態を解除するだけで、バルーン部材をカテーテル本体 力も分離することができ、バルーンカテーテルを用いた診断及び治療を円滑に行つ て患者の負担を軽減することができる。 [0028] Further, the balloon catheter is provided with a protrusion and a locking groove which are provided at the outer peripheral portion of the distal end of the catheter main body and the proximal end portion of the cylindrical portion of the balloon and which can be engaged and disengaged with each other. In this case, it is possible to separate the force of the balloon body from the catheter body simply by releasing the locking state between the protrusion and the locking groove provided on the outer peripheral portion of the distal end of the catheter body and the proximal end portion of the cylindrical portion of the balloon. Smooth diagnosis and treatment using a balloon catheter The burden on the patient can be reduced.
図面の簡単な説明  Brief Description of Drawings
[0029] [図 1]本発明のバルーンカテーテルを示した縦断面図である。  FIG. 1 is a longitudinal sectional view showing a balloon catheter of the present invention.
[図 2]本発明のバルーンカテーテルを示した一部切欠き斜視図である。  FIG. 2 is a partially cutaway perspective view showing a balloon catheter of the present invention.
[図 3]図 1のバルーンカテーテルの使用状態における一態様を示した縦断面図であ る。  3 is a longitudinal sectional view showing an embodiment of the balloon catheter of FIG. 1 in use.
[図 4]図 1のバルーンカテーテルの使用状態における一態様を示した縦断面図であ る。  4 is a longitudinal sectional view showing an embodiment of the balloon catheter in FIG. 1 in use.
[図 5]図 1のバルーンカテーテルの使用状態における一態様を示した縦断面図であ る。  FIG. 5 is a longitudinal sectional view showing an embodiment of the balloon catheter in FIG. 1 in use.
[図 6]バルーン部材の他の一例を示した縦断面図である。  FIG. 6 is a longitudinal sectional view showing another example of a balloon member.
[図 7]カテーテル本体と筒状部との接続構造の他の一例を示した模式斜視図である。  FIG. 7 is a schematic perspective view showing another example of the connection structure between the catheter body and the tubular portion.
[図 8]図 7の接続構造を示した縦断面図である。  FIG. 8 is a longitudinal sectional view showing the connection structure of FIG.
[図 9]本発明のバルーンカテーテルの他の一例を示した縦断面図である。  FIG. 9 is a longitudinal sectional view showing another example of the balloon catheter of the present invention.
[図 10]図 9のバルーンカテーテルを示した一部切欠き斜視図である。  FIG. 10 is a partially cutaway perspective view showing the balloon catheter of FIG. 9.
[図 11]本発明のバルーンカテーテルの他の一例を示した縦断面図である。  FIG. 11 is a longitudinal sectional view showing another example of the balloon catheter of the present invention.
[図 12]図 11のバルーンカテーテルの使用状態における一態様を示した縦断面図で ある。  12 is a longitudinal sectional view showing an embodiment of the balloon catheter shown in FIG. 11 in use.
[図 13]図 11のバルーンカテーテルを示した一部切欠き斜視図である。  FIG. 13 is a partially cutaway perspective view showing the balloon catheter of FIG. 11.
[図 14]本発明のバルーンカテーテルの他の一例を示した縦断面図である。  FIG. 14 is a longitudinal sectional view showing another example of the balloon catheter of the present invention.
[図 15]逆止弁を示した斜視図である。  FIG. 15 is a perspective view showing a check valve.
[図 16]図 14のバルーンカテーテルの使用状態における一態様を示した縦断面図で ある。  FIG. 16 is a longitudinal sectional view showing an embodiment of the balloon catheter of FIG. 14 in use.
[図 17]本発明のバルーンカテーテルの他の一例を示した縦断面図である。  FIG. 17 is a longitudinal sectional view showing another example of the balloon catheter of the present invention.
符号の説明  Explanation of symbols
[0030] 1 カテーテル本体 [0030] 1 Catheter body
2 バルーン部材  2 Balloon material
11 ルーメン 螺子部 突起 棒状部材a通路部 筒状部a係止溝b挿入溝 バノレーン部 螺子部 円筒状体a両端部b分離部 空間部 通孔 弾性弁体 円筒体部 有底円筒体a先端部b基端開口部 弁座部 弾性弁体 逆止弁 有底筒状体 スリット部 逆止弁 スリット部 外筒 バルーンカテ B 生体腔 11 lumens Screw part Projection Rod member a Passage part Cylindrical part a Locking groove b Insertion groove Banolane part Screw part Cylindrical body a Both ends b Separation part Space part Elastic valve body Cylindrical body Bottomed cylindrical body a Tip b base End opening Valve seat Elastic valve element Check valve Cylindrical body with slit Slit part Check valve Slit part Outer cylinder Balloon catheter B body cavity
Bl 狭窄部  Bl stenosis
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0031] 本発明のバルーンカテーテルの一例を図面を参照しつつ説明する。バルーンカテ 一テル Aを構成しているカテーテル本体 1は、図 1及び図 2に示したように、生体腔内 に円滑に挿入することができるように可撓性を有し且つ基端側の操作部での操作力 を先端側に円滑に伝達できる剛性を備えた一定長さを有する長尺状の円筒状体か らなり、その内部には全長に亘つてルーメン 11が形成されて!ヽると共に先端部外周 面には螺子部 12が形成されている。  [0031] An example of the balloon catheter of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the catheter main body 1 constituting the balloon catheter A has flexibility and can be inserted smoothly into the living body cavity. It consists of a long cylindrical body with a certain length with rigidity that can smoothly transmit the operating force at the operating section to the tip side, and a lumen 11 is formed in the interior over the entire length! In addition, a screw portion 12 is formed on the outer peripheral surface of the tip portion.
[0032] なお、カテーテル本体 1を構成する材料としては、特に限定されず、例えば、ポリエ チレン、ポリプロピレン、エチレン プロピレン共重合体などのエチレン α—ォレフ イン共重合体、プロピレン OCーォレフイン共重合体、エチレン 酢酸ビュル共重合 体などのポリオレフイン系榭脂、ポリエチレンテレフタレートなどのポリエステル系榭脂 ;ポリ塩ィ匕ビュル;ポリテトラフルォロエチレン;ポリウレタン;ポリアミド;ポリイミド;シリコ ーンゴムなどの可撓性を有する高分子材料が挙げられ、ポリウレタン、ポリアミドが好 ましい。  [0032] The material constituting the catheter body 1 is not particularly limited, and examples thereof include ethylene α-olefin copolymers such as polyethylene, polypropylene, and ethylene propylene copolymers, propylene OC-olefin copolymers, Polyolefin resin such as ethylene acetate butyl copolymer, polyester resin such as polyethylene terephthalate; Poly salt resin; Polytetrafluoroethylene; Polyurethane; Polyamide; Polyimide; Silicone rubber Polymer materials are mentioned, and polyurethane and polyamide are preferred.
[0033] 上記カテーテル本体 1の先端部にはバルーン部材 2が分離可能に接続されている 。このバルーン部材 2は、その先端部が閉塞され且つ基端部が上記カテーテル本体 1の先端部に分離可能に接続された有底円筒状の筒状部 21と、この筒状部 21の外 周面に一体的に設けられた膨張、収縮可能なバルーン部 22とからなる。  A balloon member 2 is detachably connected to the distal end portion of the catheter body 1. This balloon member 2 has a bottomed cylindrical tubular portion 21 whose distal end portion is closed and a proximal end portion is detachably connected to the distal end portion of the catheter body 1, and an outer periphery of the tubular portion 21. It comprises an inflatable / deflated balloon portion 22 provided integrally on the surface.
[0034] 上記筒状部 21は、その内径をカテーテル本体 1の内径に、外径をカテーテル本体 1の外径にそれぞれに合致させた一定長さを有する有底円筒状に形成されている。 そして、上記筒状部 21の基端部内周面には、上記カテーテル本体 1の螺子部 12に 進退自在に螺合可能な螺子部 23が形成されて ヽる。  [0034] The cylindrical portion 21 is formed in a bottomed cylindrical shape having a certain length in which the inner diameter matches the inner diameter of the catheter body 1 and the outer diameter matches the outer diameter of the catheter body 1. A threaded portion 23 that can be screwed forward and backward to the threaded portion 12 of the catheter body 1 is formed on the inner peripheral surface of the proximal end portion of the tubular portion 21.
[0035] 更に、上記筒状部 21の外周面にはノ レーン部 22がー体的に設けられている。この バルーン部 22は、上記筒状部 21の長さよりも若干短い長さを有し且つ両端が開口し てなる弾性を有する円筒状体 24を上記筒状部 21に被嵌させた上で円筒状体 24の両 端部 24a、 24aをこれに対向する筒状部 21の外周面に全周に亘つて気密的に固着 することによって構成されている。なお、円筒状体 24の両端部 24a、 24aを筒状部 21 の外周面に固着する方法としては、特に限定されず、熱融着による方法の他に、接 着剤を用いる方法、糸などを用いて縛る方法などが挙げられる。 Further, a noren portion 22 is provided in a body-like manner on the outer peripheral surface of the cylindrical portion 21. The balloon portion 22 has a length slightly shorter than the length of the cylindrical portion 21 and has an elastic cylindrical body 24 having both ends opened. Both ends 24a, 24a of the cylindrical body 24 are hermetically fixed to the outer peripheral surface of the cylindrical portion 21 opposite to the entire end 24a. It is configured by Note that the method for fixing the both end portions 24a, 24a of the cylindrical body 24 to the outer peripheral surface of the cylindrical portion 21 is not particularly limited, and in addition to the method by thermal fusion, a method using an adhesive, a thread, etc. The method of tying up using can be mentioned.
[0036] 更に、筒状部 21には、その内外周面間に亘つて貫通する円形状の通孔 26が貫設さ れており、上記通孔 26を通じて筒状部 21内に供給される流体をバルーン部 22内に供 給可能に構成している。  [0036] Further, the cylindrical portion 21 is provided with a circular through hole 26 penetrating between the inner and outer peripheral surfaces thereof, and is supplied into the cylindrical portion 21 through the through hole 26. The fluid can be supplied into the balloon portion 22.
[0037] 詳細には、筒状部 21の外周面から分離した円筒状体 24の分離部 24bと、この分離 部 24bに対向する筒状部 21の外周面とで囲まれた空間部 25内に上記通孔 26を通じ て流体を供給し、或いは、空間部 25内から流体を排出することによって、上記バル一 ン部 22が膨張、収縮可能に構成されている。  [0037] Specifically, in the space portion 25 surrounded by the separation portion 24b of the cylindrical body 24 separated from the outer peripheral surface of the cylindrical portion 21 and the outer peripheral surface of the cylindrical portion 21 facing the separation portion 24b. The balun portion 22 can be expanded and contracted by supplying a fluid through the through hole 26 or discharging the fluid from the space 25.
[0038] なお、円筒状体 24を構成する材料としては、弾性変形可能なものであれば、特に限 定されず、例えば、天然ゴム;シリコーンゴム;ウレタンゴム;ポリオレフイン系エラストマ 一、ポリスチレン系エラストマ一、ポリアミド系エラストマ一などの熱可塑'性エラストマ一 ;ポリエチレン、ポリプロピレン、エチレン プロピレン共重合体などのエチレン a ォレフィン共重合体、プロピレン ひーォレフイン共重合体、エチレン 酢酸ビュル 共重合体などのポリオレフイン系榭脂、軟質ポリ塩ィ匕ビニル、ポリウレタン、ポリイソプ レンなどが挙げられ、生体腔内でバルーン部 22の膨張、収縮が容易に行なえること 力 ら、天然ゴム、シリコーンゴム、ウレタンゴムが好ましい。  [0038] The material constituting the cylindrical body 24 is not particularly limited as long as it is elastically deformable. For example, natural rubber; silicone rubber; urethane rubber; polyolefin elastomer, polystyrene elastomer. 1. Thermoplastic elastomers such as polyamide elastomers; Polyolefins such as polyethylene, polypropylene, ethylene a olefin copolymers such as ethylene propylene copolymers, propylene olefin resins, ethylene acetate butyl copolymers, etc. Examples thereof include rosin, soft polyvinyl chloride, polyurethane, polyisoprene and the like, and natural rubber, silicone rubber, and urethane rubber are preferable because the balloon part 22 can be easily expanded and contracted in the living body cavity.
[0039] 又、円筒状体 24の厚みは、薄 、と、バルーン部 22の強度が低下する一方、厚 、と、 バルーンカテーテル Aの生体腔内への挿入性が低下するので、 50〜300 μ mが好 ましい。  [0039] In addition, the thickness of the cylindrical body 24 is thin, and the strength of the balloon portion 22 is reduced. On the other hand, the thickness and the insertability of the balloon catheter A into the living body cavity are reduced. μm is preferred.
[0040] 更に、上記流体としては、空気などの気体や、水、生理食塩水、ゲル状の薬剤など の液体が挙げられ、この流体をカテーテル本体 1を通じて筒状部 21内に供給する手 段としては、従来力も用いられている注射筒などの流体調整具が用いられる。  [0040] Further, examples of the fluid include gases such as air, and liquids such as water, physiological saline, and gel-like medicines, and means for supplying the fluid into the cylindrical portion 21 through the catheter body 1. As such, a fluid adjusting tool such as a syringe barrel, which has been conventionally used, is used.
[0041] 又、上記筒状部 21の通孔 26には、図 1及び図 2に示したように、上記バルーン部 22 の空間部 25内に供給した流体が空間部 25内から漏出するのを防止するために、上 記通孔 26を全面的に閉止可能な大きさを有する舌片形状の弾性弁体 27が逆止弁と して設けられている。 [0042] この舌片形状の弾性弁体 27は、その基端部が通孔 26の外側開口端面に固着され ている一方、基端部以外の部分は弾性変形によって内外方向に変位可能に構成さ れている。筒状部 21内に供給された流体が通孔 26を通じてバルーン部 22の空間部 2 5内に流入する時には、この流体圧によって弾性弁体 27が押し上げられて通孔 26が 開放状態となる一方、バルーン部 22の空間部 25内の内圧が筒状部 21の内圧よりも大 きい状態においては、上記弾性弁体 27がバルーン部 22の空間部 25内の流体圧によ つて通孔 26を全面的に閉止した状態となるように構成されている。 In addition, as shown in FIGS. 1 and 2, the fluid supplied into the space portion 25 of the balloon portion 22 leaks into the through hole 26 of the cylindrical portion 21 from the space portion 25. In order to prevent this, a tongue-shaped elastic valve element 27 having a size capable of completely closing the through hole 26 is provided as a check valve. [0042] The tongue-shaped elastic valve element 27 has a base end portion fixed to the outer opening end surface of the through hole 26, and a portion other than the base end portion can be displaced inward and outward by elastic deformation. It has been. When the fluid supplied into the cylindrical portion 21 flows into the space portion 25 of the balloon portion 22 through the through hole 26, the elastic valve body 27 is pushed up by this fluid pressure, and the through hole 26 is opened. When the internal pressure in the space portion 25 of the balloon portion 22 is greater than the internal pressure of the cylindrical portion 21, the elastic valve element 27 is caused to pass through the through-hole 26 by the fluid pressure in the space portion 25 of the balloon portion 22. It is comprised so that it may be in the state closed completely.
[0043] なお、舌片形状の弾性弁体の材質としては、弾性変形可能なものであれば、特に 限定されず、例えば、ポリエチレン、ポリプロピレン、エチレン プロピレン共重合体 などのエチレン α—ォレフイン共重合体、プロピレン α—ォレフイン共重合体、 エチレン 酢酸ビュル共重合体などのポリオレフイン系榭脂、ポリエチレンテレフタレ ートなどのポリエステル系榭脂、ポリ塩化ビュル、ポリウレタン、ポリアミド、ポリイミド、 天然ゴム、シリコーンゴム、ウレタンゴム、ポリオレフイン系エラストマ一、ポリスチレン 系エラストマ一、ポリアミド系エラストマ一などのエラストマ一類などが挙げられる。  [0043] The material of the tongue-shaped elastic valve body is not particularly limited as long as it can be elastically deformed. For example, ethylene α-olefin copolymer such as polyethylene, polypropylene, and ethylene propylene copolymer is used. Polyolefin resins such as coalescence, propylene α-olefin copolymer, ethylene acetate butyl copolymer, polyester resins such as polyethylene terephthalate, polychlorinated butyl, polyurethane, polyamide, polyimide, natural rubber, silicone rubber And elastomers such as urethane rubber, polyolefin-based elastomer, polystyrene-based elastomer, and polyamide-based elastomer.
[0044] 次に、上記バルーンカテーテル Αの使用要領について説明する。なお、以下では、 バルーンカテーテル Aを用いて生体腔 Bの狭窄部を拡張する要領を例に挙げて説 明する。先ず、図 1に示したように、バルーンカテーテル Aのバルーン部材 2のバル ーン部 22を収縮させた状態とした上で、バルーンカテーテル Aのバルーン部材 2を生 体腔 Bの狭窄部 B1内に挿入、位置させる。  [0044] Next, how to use the balloon catheter cage will be described. In the following, the procedure for expanding the narrowed portion of the living body cavity B using the balloon catheter A will be described as an example. First, as shown in FIG. 1, the balloon member 2 of the balloon member 2 of the balloon catheter A is in a contracted state, and the balloon member 2 of the balloon catheter A is placed in the constricted portion B1 of the living body cavity B. Insert and position.
[0045] しかる後、バルーンカテーテル Aのカテーテル本体 1のルーメン 11を通じて筒状部 2 1内に流体を供給する。すると、筒状部 21の内圧が該筒状部 21に流入した流体によ つて上昇してバルーン部 22の空間部 25の内圧よりも高くなり、この筒状部 21の内圧に よって通孔 26に設けている弾性弁体 27が通孔 26から離間する方向に (外方に)変位 して通孔 26が開放された状態となる。そして、この開放状態の通孔 26を通じてバル一 ン部 22の空間部 25内に流体が流入してバルーン部 22が膨張し、図 3に示したように、 生体腔 Bの狭窄部 B1を拡張させる。  Thereafter, a fluid is supplied into the tubular portion 21 through the lumen 11 of the catheter body 1 of the balloon catheter A. Then, the internal pressure of the tubular portion 21 rises due to the fluid flowing into the tubular portion 21 and becomes higher than the internal pressure of the space portion 25 of the balloon portion 22. As a result, the elastic valve element 27 is displaced in the direction away from the through hole 26 (outward), and the through hole 26 is opened. Then, fluid flows into the space portion 25 of the balloon portion 22 through the open through hole 26 and the balloon portion 22 is inflated. As shown in FIG. 3, the constricted portion B1 of the living body cavity B is expanded. Let
[0046] 次に、カテーテル本体 1のルーメン 11を通じた筒状部 21内への流体の供給を停止 する。すると、図 4に示したように、バルーン部 22の空間部 25内の圧力が筒状部 21の 内圧よりも高くなり、バルーン部 22の空間部 25の内圧によって弾性弁体 27が通孔 26 の外側開口端面に押圧されて通孔 26を完全に閉止して、バルーン部 22の空間部 25 内に流入した流体力 Sバルーン部 22外に漏出するのを確実に防止し、バルーン部 22 の膨張状態が確実に維持される。 Next, the supply of fluid into the tubular portion 21 through the lumen 11 of the catheter body 1 is stopped. Then, as shown in FIG. 4, the pressure in the space portion 25 of the balloon portion 22 is The elastic valve element 27 is pressed against the outer opening end face of the through hole 26 by the internal pressure of the space part 25 of the balloon part 22 due to the pressure higher than the internal pressure, and the through hole 26 is completely closed. The fluid force that has flowed into the S is reliably prevented from leaking out of the balloon portion 22, and the inflated state of the balloon portion 22 is reliably maintained.
[0047] 続いて、図 5に示したように、カテーテル本体 1をその軸芯を中心にして回転させて 、ノ レーン部材 2の筒状部 21の螺子部 23に螺合させて 、るカテーテル本体 1の螺子 部 12を螺退させ、バルーン部材 2の筒状部 21の螺子部 23と、カテーテル本体 1の螺 子部 12との螺合状態を解除して、バルーン部材 2とカテーテル本体 1とを分離し、力 テーテル本体 1を生体腔 Bから引き抜いて取り除き、次の治療や検査を続行すること ができる。 Subsequently, as shown in FIG. 5, the catheter body 1 is rotated about its axial center and is screwed into the screw portion 23 of the cylindrical portion 21 of the noren member 2. The screw part 12 of the main body 1 is screwed out to release the screwed state between the screw part 23 of the cylindrical part 21 of the balloon member 2 and the screw part 12 of the catheter main body 1, and the balloon member 2 and the catheter main body 1 are released. The force Tethel body 1 can be pulled out and removed from the body cavity B, and the next treatment or examination can be continued.
[0048] このように、上記バルーンカテーテル Aによれば、カテーテル本体 1をその軸芯を中 心にして回転させるといった簡単な操作でもってカテーテル本体 1とバルーン部材 2 とを簡単に且つ確実に分離させることができ、生体腔 B内における診断及び治療を 円滑に行うことができる。  As described above, according to the balloon catheter A, the catheter body 1 and the balloon member 2 can be easily and reliably separated by a simple operation such as rotating the catheter body 1 around its axis. Diagnosis and treatment in the body cavity B can be performed smoothly.
[0049] そして、生体腔 B内に留置されたバルーン部材 2は、そのバルーン部 22の空間部 25 内に圧入された流体力バルーン部 22の空間部 25外に漏出するのを弾性弁体 27によ つて確実に防止されており、バルーン部 22は長時間に亘つて膨張状態を安定的に維 持し、生体腔 Bの狭窄部 B1の拡張を確実に行うことができる。  The balloon member 2 placed in the living body cavity B leaks out of the space portion 25 of the fluid force balloon portion 22 press-fitted into the space portion 25 of the balloon portion 22. Therefore, the balloon portion 22 can stably maintain the inflated state for a long time, and can reliably expand the constricted portion B1 of the living body cavity B.
[0050] ここで、上述したバルーンカテーテル Aでは、その筒状部 21を有底円筒状に形成し 、この筒状部 21に両端が開口してなる円筒状体 24を被嵌、一体化させてバルーン部 22を構成した場合を説明した力 図 6に示したように、両端が開口してなる円筒状の 円筒体部 31に、この円筒体部 31の長さよりも若干長い長さを有し且つ先端が閉止し てなる弾性を有する有底円筒体 32を上記円筒体部 31に先端側力 被嵌させた上で 、有底円筒体 32の先端部 32a及び基端開口部 32bのそれぞれをこれらに対向する 円筒体部 31の外周面に一体化させることによって、円筒体部 31の先端開口部を有底 円筒体 32の底部で閉塞して筒状部 21となし、この筒状部 21の外周面にバルーン部 2 2を一体的に装着したものであってもよい。なお、上述した以外の構成については、 図 1乃至図 5に示したバルーンカテーテル Aと同様の構成であるので、同一符号を付 してその説明を省略する。 Here, in the above-described balloon catheter A, the cylindrical portion 21 is formed in a bottomed cylindrical shape, and a cylindrical body 24 having both ends opened is fitted into and integrated with the cylindrical portion 21. As shown in FIG. 6, the cylindrical cylindrical portion 31 having both ends opened has a length slightly longer than the length of the cylindrical portion 31 as shown in FIG. In addition, after the bottomed cylindrical body 32 having elasticity with the distal end closed is fitted on the cylindrical body portion 31 with the distal side force, each of the distal end portion 32a and the proximal end opening portion 32b of the bottomed cylindrical body 32 is provided. Is integrated with the outer peripheral surface of the cylindrical body portion 31 opposed to the cylindrical body portion 31, thereby closing the tip opening of the cylindrical body portion 31 with the bottom portion of the bottomed cylindrical body 32 to form the cylindrical portion 21. The balloon portion 22 may be integrally attached to the outer peripheral surface of 21. The configurations other than those described above are the same as the balloon catheter A shown in FIGS. Therefore, the description is omitted.
[0051] 又、上述したバルーンカテーテル Aでは、カテーテル本体 1とバルーン部材 2との接 続、分離を、カテーテル本体 1とバルーン部材 2の対向端部に互いに螺合可能な螺 子部 12、 23を形成することにより行った場合を説明した力 図 7及び図 8に示したよう に、筒状部 21の基端開口部の内周面に一定幅、一定深さを有する円環状の係止溝 21aと、この係止溝 21aに直交した状態に連通し且つ筒状部 21の基端面に開口する 一定幅、一定深さを有する挿入溝 2 lbとを形成している一方、カテーテル本体 1の先 端部外周面に上記挿入溝 2 lbに挿入可能にして係止溝 21aに係脱自在に係止可 能な突起 13を突設してなるものであってもよい。なお、図 7及び図 8においては、説明 の便宜上、バルーン部 22を省略してある。  In the above-described balloon catheter A, the catheter body 1 and the balloon member 2 can be connected and separated from each other at the opposite end portions of the catheter body 1 and the balloon member 2 by screw portions 12, 23. As shown in FIGS. 7 and 8, an annular lock having a constant width and a constant depth on the inner peripheral surface of the proximal end opening of the cylindrical portion 21 is illustrated. On the other hand, the catheter body 1 is formed with a groove 21a and an insertion groove 2lb having a constant width and a constant depth that communicates in a state orthogonal to the locking groove 21a and opens at the proximal end surface of the tubular portion 21. A protrusion 13 that can be inserted into the insertion groove 2 lb and can be detachably engaged with the engagement groove 21a may be provided on the outer peripheral surface of the front end. 7 and 8, the balloon portion 22 is omitted for convenience of explanation.
[0052] この場合、カテーテル本体 1の先端部を筒状部 21の基端開口部内にカテーテル本 体 1の突起 13を筒状部 21の挿入溝 21bに合致させた状態にして挿入し、カテーテル 本体 1の突起 13を筒状部 21の係止溝 21a内に位置させ、その状態で、カテーテル本 体 1をその軸芯回りに所定角度だけ回転させることにより、図 8に示したように、カテー テル本体 1の突起 13を筒状部 21の係止溝 21aに係脱自在に係止させて、カテーテル 本体 1とバルーン部材 2とを分離可能に接続させている。なお、上述した以外の構成 については、図 1乃至図 5に示したバルーンカテーテル Aと同様の構成であるので、 同一符号を付してその説明を省略する。  [0052] In this case, the distal end portion of the catheter body 1 is inserted into the proximal end opening of the tubular portion 21 with the protrusion 13 of the catheter body 1 aligned with the insertion groove 21b of the tubular portion 21, and the catheter is inserted. As shown in FIG. 8, the protrusion 13 of the main body 1 is positioned in the locking groove 21a of the cylindrical portion 21, and in this state, the catheter body 1 is rotated by a predetermined angle around its axis. The protrusion 13 of the catheter body 1 is detachably locked in the locking groove 21a of the cylindrical portion 21 so that the catheter body 1 and the balloon member 2 are detachably connected. Since configurations other than those described above are the same as those of the balloon catheter A shown in FIGS. 1 to 5, the same reference numerals are given and description thereof is omitted.
[0053] 更に、上記バルーンカテーテル Aでは、筒状部 21の通孔 26に弾性弁体 27を配設し た場合を説明したが、図 9及び図 10に示したように、筒状部 21の基端開口部に逆止 弁を配設してもよい。具体的には、筒状部 21の基端開口部の内周面に、その全周に 亘つて円環状の弁座部 41を突設し、この弁座部 41の内面上端部に、該弁座部 41の 開口部を全面的に閉止し得る大きさを有する舌片形状の弾性弁体 42の上端縁部を 固着させることにより、筒状部 21の基端開口部に逆止弁を配設している。  Furthermore, in the above balloon catheter A, the case where the elastic valve element 27 is disposed in the through hole 26 of the cylindrical portion 21 has been described. However, as shown in FIGS. 9 and 10, the cylindrical portion 21 A check valve may be provided at the proximal end opening. Specifically, an annular valve seat 41 is provided on the inner peripheral surface of the base end opening of the cylindrical portion 21 over the entire circumference, and the upper end of the inner surface of the valve seat 41 is By attaching the upper end edge of the tongue-shaped elastic valve element 42 having a size capable of completely closing the opening of the valve seat 41, a check valve is provided at the proximal opening of the tubular part 21. It is arranged.
[0054] しかして、カテーテル本体 1のルーメン 11を通じて筒状部 21に向力つて流体を供給 すると、上記弾性弁体 42は、筒状部 21内に向力う流体圧によって、上端固定部を支 点として内方に向力つて弾性的に屈曲して筒状部 21の基端開口部を開放する。そし て、カテーテル本体 1のルーメン 11を通じて筒状部 21内に供給された流体は、筒状 部 21の通孔 26を通じてバルーン部 22の空間部 25内に流入しバルーン部 22を膨張さ せる。 Therefore, when fluid is supplied to the tubular portion 21 by force through the lumen 11 of the catheter body 1, the elastic valve body 42 causes the upper end fixing portion to be moved by the fluid pressure acting in the tubular portion 21. As a fulcrum, it is elastically bent by inward force and opens the proximal end opening of the tubular portion 21. The fluid supplied into the tubular part 21 through the lumen 11 of the catheter body 1 is tubular. The balloon part 22 is inflated by flowing into the space part 25 of the balloon part 22 through the through hole 26 of the part 21.
[0055] そして、筒状部 21内への流体の供給を停止すると、筒状部 21内の圧力が筒状部 21 外の圧力よりも高い状態となり、上記弾性弁体 42は、その外周縁部が筒状部 21内の 圧力によって弁座部 41の内面に押圧された状態となり、筒状部 21の基端開口部を完 全に閉止し、バルーン部 22の空間部 25内から流体が漏出するのを防止してバルーン 部 22の膨張状態が確実に維持される。  [0055] When the supply of fluid into the cylindrical portion 21 is stopped, the pressure in the cylindrical portion 21 becomes higher than the pressure outside the cylindrical portion 21, and the elastic valve body 42 The portion is pressed against the inner surface of the valve seat 41 by the pressure in the tubular portion 21, completely closes the proximal end opening of the tubular portion 21, and fluid flows from the space portion 25 of the balloon portion 22. The balloon 22 is reliably maintained in an inflated state by preventing leakage.
[0056] なお、弾性弁体 42の材質としては、弾性変形可能なものであれば、特に限定されず 、図 1乃至図 5で示したバルーンカテーテル Aの弾性弁体 27と同様の材料を用いるこ とができる。又、図 1乃至図 5で示したバルーンカテーテル Aと同様の構造について は同一の符号を付してその説明を省略する。  [0056] The material of the elastic valve element 42 is not particularly limited as long as it is elastically deformable, and the same material as the elastic valve element 27 of the balloon catheter A shown in Figs. 1 to 5 is used. be able to. Further, the same structure as the balloon catheter A shown in FIG. 1 to FIG.
[0057] 更に、筒状部 21の基端開口部に逆止弁を配設する構造としては図 11乃至図 13に 示した構造であってもよい。具体的には、逆止弁 5は、外径が筒状部 21の内径に合 致し且つ底部が凸円弧状に形成された弾性を有する有底筒状体 50からなり、この有 底筒状体 50をその基端開口部をカテーテル本体 1側に指向させた状態にして有底 筒状体 50の基端外周面を筒状部 21の基端内周面に全面的に気密的に固着一体ィ匕 させている。  Furthermore, the structure shown in FIGS. 11 to 13 may be used as the structure in which the check valve is provided in the proximal end opening of the cylindrical portion 21. Specifically, the check valve 5 includes an elastic bottomed cylindrical body 50 having an outer diameter that matches the inner diameter of the cylindrical portion 21 and a bottom portion that is formed in a convex arc shape. With the body 50 facing the proximal end opening toward the catheter body 1 side, the base end outer peripheral surface of the bottomed cylindrical body 50 is completely and airtightly fixed to the base end inner peripheral surface of the cylindrical portion 21. It ’s all together.
[0058] そして、有底筒状体 50の底部外周面を該有底筒状体 50の径方向に向力つて切り 込むことによって、バルーン部 2側に供給される流体圧によって開口し且つバルーン 部 22側の流体圧によって閉止する一条のスリット部 51を有底筒状体 50に設けて逆止 弁 5を構成している。  [0058] Then, the bottom outer peripheral surface of the bottomed tubular body 50 is cut in the radial direction of the bottomed tubular body 50 to open it by the fluid pressure supplied to the balloon portion 2 side, and the balloon The check valve 5 is configured by providing the bottomed cylindrical body 50 with a single slit 51 that is closed by the fluid pressure on the part 22 side.
[0059] しかして、筒状部 21内に向かってカテーテル本体 1のルーメン 11を通じて流体を供 給すると、上記逆止弁 5のスリット部 51は、有底筒状体 50内に供給される流体の流入 圧によって開口し、この開口したスリット部 51及び筒状部 21の通孔 26を通じてバル一 ン部 22の空間部 25内に流体が流入してバルーン部 22を膨張させる。  Therefore, when fluid is supplied into the tubular portion 21 through the lumen 11 of the catheter body 1, the slit portion 51 of the check valve 5 is supplied to the bottomed tubular body 50. The fluid flows into the space portion 25 of the balloon portion 22 through the slit portion 51 and the through hole 26 of the cylindrical portion 21 to inflate the balloon portion 22.
[0060] そして、筒状部 21内への流体の供給を停止すると、筒状部 21内の圧力が筒状部 21 外の圧力よりも高い状態となって、上記有底筒状体 50のスリット部 51が、筒状部 21内 の圧力によって完全に閉止された状態となり、バルーン部 22の空間部 25内から流体 が漏出するのが防止されてバルーン部 22の膨張状態が確実に維持される。 [0060] When the supply of fluid into the cylindrical portion 21 is stopped, the pressure in the cylindrical portion 21 becomes higher than the pressure outside the cylindrical portion 21, and the bottomed cylindrical body 50 The slit portion 51 is completely closed by the pressure in the cylindrical portion 21, and fluid is discharged from the space portion 25 of the balloon portion 22. Is prevented from leaking, and the inflated state of the balloon portion 22 is reliably maintained.
[0061] なお、有底筒状体 50の材質としては、弾性変形可能なものであれば、特に限定され ず、図 1乃至図 5で示したバルーンカテーテル Aの弾性弁体 27と同様の材料を用い ることができる。又、図 1乃至図 5で示したノ レーンカテーテル Aと同様の構造につい ては同一の符号を付してその説明を省略する。 [0061] The material of the bottomed cylindrical body 50 is not particularly limited as long as it is elastically deformable, and is the same material as that of the elastic valve body 27 of the balloon catheter A shown in Figs. Can be used. In addition, the same reference numerals are given to the same structure as that of the none catheter A shown in FIGS. 1 to 5, and the description thereof is omitted.
[0062] 更に、上記では、有底筒状体 50力もなる逆止弁 5のスリット部 51を流体圧によって開 閉させる場合を説明したが、カテーテル本体 1の先端部に一体的に設けた棒状部材 14によって逆止弁を開閉させる構造としてもよい。なお、図 1のバルーンカテーテルと 同一構造部分については同一符号を付してその説明を省略する。 [0062] Furthermore, in the above description, the case where the slit portion 51 of the check valve 5 having a bottomed cylindrical body 50 force is opened and closed by the fluid pressure has been described. However, the rod shape integrally provided at the distal end portion of the catheter body 1 is described. The check valve may be opened and closed by the member 14. The same structural parts as those of the balloon catheter in FIG.
[0063] 具体的には、逆止弁 6は、図 14及び図 15に示したように、外径が筒状部 21の内径 に合致し且つ底部が凸円弧状に形成された弾性を有する有底筒状体 60力 なり、こ の有底筒状体 60をその基端開口部をカテーテル本体 1側に指向させた状態にして 有底筒状体 60の基端外周面を筒状部 21の基端内周面に全面的に気密的に固着一 体ィ匕させている。そして、有底筒状体 60の底部にその両面間に亘つて貫通するスリツ ト部 61を形成している。 Specifically, as shown in FIGS. 14 and 15, the check valve 6 has elasticity that the outer diameter matches the inner diameter of the cylindrical portion 21 and the bottom portion is formed in a convex arc shape. The bottomed tubular body 60 has a force, and the bottomed tubular body 60 is in a state where the base end opening is directed toward the catheter body 1 side. The 21 base end inner peripheral surfaces are firmly and hermetically bonded together. A slit 61 that penetrates between the both surfaces of the bottomed cylindrical body 60 is formed.
[0064] 一方、カテーテル本体 1 'は、その外径がバルーン部材 2の筒状部 21の内径に合致 した長尺状の円筒状に形成されている。カテーテル本体 1 'の先端部には一定長さを 有する棒状部材 14が突設されている。この棒状部材 14は、その先端面に開口する通 路部 14aがカテーテル本体 1 'のルーメン 11に連通した状態に形成されている。  On the other hand, the catheter body 1 ′ is formed in a long cylindrical shape whose outer diameter matches the inner diameter of the cylindrical portion 21 of the balloon member 2. A rod-like member 14 having a predetermined length is projected from the distal end portion of the catheter body 1 ′. The rod-like member 14 is formed in a state where a passage portion 14a opened at the distal end surface thereof communicates with the lumen 11 of the catheter body 1 ′.
[0065] そして、カテーテル本体 の先端部がバルーン部材 2の筒状部 21の基端開口部内 に挿入されて 、ると共に、カテーテル本体 1,の棒状部材 14が逆止弁 6のスリット部 61 に貫通した状態となっており、この状態においては、逆止弁 6は開放状態となってお り、バルーン部材 2のバルーン部 22の空間部 25とカテーテル本体 1,のルーメン 11とが 棒状部材 14を介して連通した状態となって 、る。  Then, the distal end portion of the catheter body is inserted into the proximal end opening of the tubular portion 21 of the balloon member 2, and the rod-like member 14 of the catheter body 1 is inserted into the slit portion 61 of the check valve 6. In this state, the check valve 6 is open, and the space portion 25 of the balloon portion 22 of the balloon member 2 and the lumen 11 of the catheter body 1 are connected to the rod-like member 14. It is in a state of communication through.
[0066] 一方、カテーテル本体 をバルーン部材 2の筒状部 21の基端開口部内から引き抜 き、カテーテル本体 の棒状部材 14を逆止弁 6のスリット部 61力も抜き取ると、逆止弁 6のスリット部 61がバルーン部材 2のバルーン部 22内の流体圧によって自動的に閉止 するように構成されている。 [0067] 更に、カテーテル本体 1 'には、このカテーテル本体 1 'の外径に合致する内径を有 し且つバルーン部材 2の筒状部 21の外径に合致した外径を有する長尺状の外筒 7が 被嵌されている。外筒 7はその長さ方向にカテーテル本体 1 'に対して相対的に変位 自在に構成されている。そして、外筒 7は、その先端開口端面 71がバルーン部材 2の 筒状部 21の基端開口端面 21aに全周に亘つて全面的に分離可能に当接した状態と なっている。又、外筒 7の基端開口部からはカテーテル本体 1 'の基端部が突出した 状態となっており、このカテーテル本体 1,の基端突出部を把持してカテーテル本体 1 'が操作できるように構成されて 、る。 [0066] On the other hand, when the catheter body is pulled out from the inside of the proximal end opening of the cylindrical portion 21 of the balloon member 2 and the rod-like member 14 of the catheter body is also pulled out of the slit portion 61 force of the check valve 6, the check valve 6 The slit portion 61 is configured to be automatically closed by the fluid pressure in the balloon portion 22 of the balloon member 2. [0067] Further, the catheter body 1 'has an elongated shape having an inner diameter that matches the outer diameter of the catheter body 1' and an outer diameter that matches the outer diameter of the tubular portion 21 of the balloon member 2. The outer cylinder 7 is fitted. The outer cylinder 7 is configured to be displaceable relative to the catheter body 1 ′ in the length direction. The outer cylinder 7 is in such a state that its distal end opening end surface 71 is in full contact with the proximal end opening end surface 21a of the cylindrical portion 21 of the balloon member 2 so as to be separable over the entire circumference. Further, the proximal end portion of the catheter body 1 ′ protrudes from the proximal end opening of the outer cylinder 7, and the catheter body 1 ′ can be operated by grasping the proximal end protruding portion of the catheter body 1. It is structured as follows.
[0068] 次に、上記バルーンカテーテルの使用要領について説明する。先ず、バルーン力 テーテル Aのバルーン部材 2のバルーン部 22を収縮させた状態とした上で、バル一 ンカテーテル Aのノ レーン部材 2を生体腔の狭窄部内に挿入、位置させる。  Next, how to use the balloon catheter will be described. First, the balloon member 22 of the balloon member 2 of the balloon force Tetel A is in a contracted state, and then the non-member member 2 of the balloon catheter A is inserted and positioned in the constricted portion of the living body cavity.
[0069] しかる後、カテーテル本体 1,のルーメン 11及び棒状部材 14の通路部 14aを通じてバ ルーン部材 2のバルーン部 22の空間部 25内に流体を供給してバルーン部 22を膨張 させ、生体腔の狭窄部を拡張させる。そして、カテーテル本体 1 'を通じたノ レーン部 材 2のバルーン部 22内への流体の供給を停止する。  [0069] After that, fluid is supplied into the space portion 25 of the balloon portion 22 of the balloon member 2 through the lumen 11 of the catheter body 1 and the passage portion 14a of the rod-shaped member 14, and the balloon portion 22 is inflated, so that the living body cavity To expand the constriction. Then, the supply of fluid into the balloon portion 22 of the noren member 2 through the catheter body 1 ′ is stopped.
[0070] 次に、図 16に示したように、外筒 7の先端開口端面 71をバルーン部材 2の筒状部 2 1の基端開口端面 21aに当接させた状態を維持しつつ、カテーテル本体 1 'を基端側 に向かって引き抜く。すると、カテーテル本体 1 'の棒状部材 14も逆止弁 6のスリット部 61から引き抜かれ、逆止弁 6のスリット部 61がバルーン部 22の流体圧によって自動的 に閉止されて逆止弁 6は閉止状態となる。よって、バルーン部材 2のバルーン部 22は その膨張状態を確実に維持する。  Next, as shown in FIG. 16, while maintaining the state where the distal end opening end surface 71 of the outer cylinder 7 is in contact with the proximal end opening end surface 21a of the tubular portion 21 of the balloon member 2, the catheter Pull out the body 1 'toward the base end. Then, the rod-like member 14 of the catheter body 1 ′ is also pulled out from the slit portion 61 of the check valve 6, and the slit portion 61 of the check valve 6 is automatically closed by the fluid pressure of the balloon portion 22, so that the check valve 6 is Closed state. Therefore, the balloon portion 22 of the balloon member 2 is reliably maintained in its expanded state.
[0071] カテーテル本体 1 'をバルーン部材 2の筒状部 21内から引き抜く時、外筒 7の先端開 口端面 71がバルーン部材 2の筒状部 21の基端開口端面 21aに当接している。従って 、カテーテル本体 と筒状部 21との対向面における擦動摩擦や、逆止弁 6のスリット 部 61からの棒状部材 14の引き抜き抵抗によって、バルーン部材 2がカテーテル本体 1 ,の引き抜き方向に変位するのを外筒 7によって阻止し、バルーン部材 2を所定位置 に確実に位置させておくことができる。そして、カテーテル本体 1 '及び外筒 7を生体 腔から引き抜いて取り出し、次の治療や検査を続行することができる。 [0072] 又、図 17に示したように、バルーン部材 2の筒状部 21の基端部内に逆止弁 6を配 設する代わりに、バルーン部材 2の筒状部 21の基端部に、円筒状の逆止弁収納部 8 を被嵌一体ィ匕し、この逆止弁収納部 8内に逆止弁 6を一体的に設けたものであっても よい。 [0071] When the catheter body 1 'is pulled out from the tubular portion 21 of the balloon member 2, the distal end opening end surface 71 of the outer tube 7 is in contact with the proximal end opening end surface 21a of the tubular portion 21 of the balloon member 2. . Accordingly, the balloon member 2 is displaced in the pulling direction of the catheter body 1 due to frictional friction between the catheter body and the cylindrical portion 21 facing each other and the pulling resistance of the rod-shaped member 14 from the slit portion 61 of the check valve 6. This can be prevented by the outer cylinder 7, and the balloon member 2 can be reliably positioned at a predetermined position. Then, the catheter body 1 ′ and the outer tube 7 can be pulled out and taken out from the living body cavity, and the next treatment or examination can be continued. In addition, as shown in FIG. 17, instead of disposing the check valve 6 in the base end portion of the cylindrical portion 21 of the balloon member 2, the base end portion of the cylindrical portion 21 of the balloon member 2 is arranged. Alternatively, a cylindrical check valve storage portion 8 may be fitted and integrated, and the check valve 6 may be integrally provided in the check valve storage portion 8.
[0073] 上記逆止弁 6は、図 14及び図 15に示したように、外径が逆止弁収納部 8の内径に 合致し且つ底部が凸円弧状に形成された弾性を有する有底筒状体 60からなり、この 有底筒状体 60をその基端開口部をカテーテル本体 1側に指向させた状態にして有 底筒状体 60の基端外周面を逆止弁収納部 8の内周面に全面的に気密的に固着一 体ィ匕させている。そして、有底筒状体 60の底部にその両面間に亘つて貫通する一条 のスリット部 61を形成している。なお、バルーン部材 2の筒状部 21と逆止弁収納部 8と の接続部において、筒状部 21と逆止弁収納部 81の対向面同士は気密的に一体化さ れている。  [0073] As shown in Figs. 14 and 15, the check valve 6 has an elastic bottom with an outer diameter that matches the inner diameter of the check valve storage portion 8 and whose bottom is formed in a convex arc shape. The bottomed cylindrical body 60 is formed with the base end opening directed toward the catheter body 1 and the base end outer peripheral surface of the bottomed cylindrical body 60 is set to the check valve storage portion 8. It is firmly and airtightly bonded to the inner peripheral surface of the whole. A single slit 61 is formed in the bottom of the bottomed cylindrical body 60 so as to penetrate between both surfaces. Note that, in the connection portion between the tubular portion 21 of the balloon member 2 and the check valve storage portion 8, the opposing surfaces of the tubular portion 21 and the check valve storage portion 81 are integrated in an airtight manner.
[0074] 又、外筒 7の先端開口端面 71が逆止弁収納部 8の基端開口端面 81に全周に亘っ て分離可能に当接して 、る。図 1乃至図 16に示したバルーンカテーテル Aと同様の 構造部分については同一符号を付してその説明を省略する。  In addition, the distal end opening end surface 71 of the outer cylinder 7 is in contact with the proximal end opening end surface 81 of the check valve storage portion 8 so as to be separable over the entire circumference. Structural portions similar to those of the balloon catheter A shown in FIGS. 1 to 16 are denoted by the same reference numerals, and description thereof is omitted.
[0075] 更に、図 14乃至図 17に示したバルーンカテーテルでは、逆止弁 6にスリット部 61を 形成した場合を説明した力 逆止弁 6にスリット部 61を形成しないと共に、カテーテル 本体 1 'の棒状部材 14を注射針の如く先端部を尖鋭端としてもょ 、。  Further, in the balloon catheter shown in FIGS. 14 to 17, the force described when the slit portion 61 is formed in the check valve 6 does not form the slit portion 61 in the check valve 6, and the catheter body 1 ′ The rod-shaped member 14 has a sharp tip like an injection needle.
[0076] そして、棒状部材 14の尖鋭端を逆止弁 6に貫通させることによって逆止弁 6を開放 状態とし、ノ レーン部 22とカテーテル本体 内とを棒状部材 14を介して連通した状 態となるように構成されている一方、棒状部材 14を逆止弁 6から引き抜くと、逆止弁 6 が自動的に閉塞して閉止状態となるように構成してもよい。  Then, the check valve 6 is opened by passing the sharp end of the rod-shaped member 14 through the check valve 6, and the noren 22 and the inside of the catheter body are communicated via the rod-shaped member 14. On the other hand, when the rod-like member 14 is pulled out from the check valve 6, the check valve 6 may be automatically closed and closed.
産業上の利用可能性  Industrial applicability
[0077] 本発明のバルーンカテーテルは、検査や治療のために生体内に挿入して用いられ 、狭窄部の拡張、生体腔に生じた孔の閉塞、糸且織の剥離などを行なった上で、その 状態を長時間に亘つて安定的に維持した状態で行う治療や検査の用途に適用でき る。 [0077] The balloon catheter of the present invention is used by being inserted into a living body for examination or treatment, and after performing expansion of a stenosis, closing of a hole formed in a living body cavity, peeling of a thread and fabric, and the like. Therefore, it can be applied to the use of treatment and examination performed in a state where the state is stably maintained for a long time.

Claims

請求の範囲 The scope of the claims
[1] カテーテル本体と、このカテーテル本体の先端部に分離可能に接続されたバルーン 部材であって、先端が閉塞され且つ基端部が上記カテーテル本体の先端部に分離 可能に接続された筒状部と、この筒状部の外周面に一体的に設けられた膨張、収縮 自在なバルーン部と、上記筒状部に形成され且つ上記筒状部内に供給される流体 をバルーン部内に供給するための通孔と、上記バルーン部内からの流体の漏出を防 止するための逆止弁とからなるバルーン部材とを備えていることを特徴とするバル一 ンカテーテル。  [1] A catheter body and a balloon member detachably connected to the distal end portion of the catheter body, the distal end being closed, and a proximal end portion being separably connected to the distal end portion of the catheter body And a balloon portion that is integrally provided on the outer peripheral surface of the cylindrical portion and that can freely expand and contract, and a fluid that is formed in the cylindrical portion and that is supplied into the cylindrical portion. And a balloon member comprising a check valve for preventing leakage of fluid from the inside of the balloon portion.
[2] 筒状部の通孔に配設された逆止弁を備えていることを特徴とする請求項 1に記載の ノ レーン力テーテノレ。  [2] The lane force tester according to claim 1, further comprising a check valve disposed in the through hole of the cylindrical portion.
[3] 筒状部の基端開口部に配設された逆止弁を備えて!/ヽることを特徴とする請求項 1に 記載のバルーンカテーテル。  [3] The balloon catheter according to [1], further comprising a check valve disposed at a proximal end opening of the tubular portion.
[4] 筒状部の通孔又は基端開口部に配設され、且つ、舌片形状の弾性弁体から形成さ れた逆止弁を備えて 、ることを特徴とする請求項 1に記載のバルーンカテーテル。  [4] The method according to claim 1, further comprising a check valve disposed in a through hole or a base end opening of the cylindrical portion and formed of a tongue-shaped elastic valve body. The balloon catheter described.
[5] カテーテル本体側に向力つて開口し、弾性を有する有底筒状体からなり、且つ、バル ーン部方向に供給される流体圧によって開口し且つバルーン部側からの流体圧によ つて閉止するスリット部が上記有底筒状体に形成されてなる逆止弁を備えていること を特徴とする請求項 3に記載のバルーンカテーテル。  [5] Opening by force toward the catheter body side, consisting of a bottomed cylindrical body having elasticity, opened by the fluid pressure supplied in the balloon direction, and by the fluid pressure from the balloon side 4. The balloon catheter according to claim 3, further comprising a check valve in which a slit portion to be closed is formed in the bottomed cylindrical body.
[6] カテーテル本体側に向力つて開口し且つ弾性を有する有底筒状体力もなる逆止弁と 、カテーテル本体の先端部に一体的に設けられた棒状部材とを備えており、上記棒 状部材が上記逆止弁を貫通することによってバルーン部内と上記カテーテル本体内 とが連通する一方、逆止弁から棒状部材を抜き去ることによって逆止弁が閉止するこ とを特徴とする請求項 3に記載のバルーンカテーテル。  [6] A check valve that opens toward the catheter body side and has an elastic bottomed cylindrical body force, and a rod-like member that is integrally provided at the distal end of the catheter body. The inside of the balloon portion and the inside of the catheter body communicate with each other when the check-like member passes through the check valve, and the check valve is closed by removing the rod-like member from the check valve. 3. The balloon catheter according to 3.
[7] 逆止弁にスリット部が形成されており、このスリット部に棒状部材を挿入することによつ てノ レーン部内とカテーテル本体内とが連通する一方、上記スリット部力 棒状部材 を抜き去ることによって逆止弁が閉止することを特徴とする請求項 6に記載のバル一 ンカテーテル。  [7] A slit portion is formed in the check valve, and by inserting a rod-like member into the slit portion, the inside of the none portion communicates with the inside of the catheter body, while the slit portion force rod-like member is removed. 7. The balloon catheter according to claim 6, wherein the check valve is closed by leaving.
[8] バルーン部材の筒状部内に挿入可能な外径を有するカテーテル本体と、このカテー テル本体に被嵌され且つ上記バルーン部材の筒状部の基端開口端面に当接する 外筒とを備えていることを特徴とする請求項 6に記載のバルーンカテーテル。 [8] A catheter body having an outer diameter that can be inserted into the cylindrical portion of the balloon member, and the catheter 7. The balloon catheter according to claim 6, further comprising: an outer tube that is fitted to the tell body and abuts against a proximal end opening end surface of the tubular portion of the balloon member.
[9] カテーテル本体の先端部とバルーン部材の筒状部の基端部とに形成され、且つ、互 いに螺合可能な螺子部を備えて 、ることを特徴とする請求項 1に記載のバルーン力 テーテノレ。 [9] The device according to claim 1, further comprising a screw portion formed at a distal end portion of the catheter main body and a proximal end portion of the cylindrical portion of the balloon member and capable of being screwed together. Balloon power Tete Nore.
[10] カテーテル本体の先端外周部とバルーンの筒状部の基端部とに設けられ、且つ、互 いに係脱可能な突起及び係止溝を備えて 、ることを特徴とする請求項 1に記載のバ ノレーン力テーテノレ。  [10] The protrusion provided on the outer peripheral portion of the distal end of the catheter body and the proximal end portion of the cylindrical portion of the balloon, and provided with a protrusion and a locking groove that can be engaged and disengaged with each other. 1. A banorene force tester according to 1.
PCT/JP2006/307255 2005-05-31 2006-04-05 Balloon catheter WO2006129419A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1977684A1 (en) * 2007-03-16 2008-10-08 Fujinon Corporation Endoscope
WO2014040064A1 (en) * 2012-09-10 2014-03-13 Boston Scientific Scimed, Inc. Catheter with releasable balloon and related methods
CN113350648A (en) * 2021-07-18 2021-09-07 温州医科大学附属第一医院 Tracheal catheter capable of accurately local anesthesia

Families Citing this family (17)

* Cited by examiner, † Cited by third party
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US8845672B2 (en) 2002-05-09 2014-09-30 Reshape Medical, Inc. Balloon system and methods for treating obesity
US9272120B2 (en) 2006-01-25 2016-03-01 Mayser, Llc Stretch valve balloon catheter and methods for producing and using same
US20070100368A1 (en) 2005-10-31 2007-05-03 Quijano Rodolfo C Intragastric space filler
US9713698B2 (en) 2006-01-25 2017-07-25 Mayser, Llc Stretch valve balloon catheter and methods for producing and using same
US8142469B2 (en) 2007-06-25 2012-03-27 Reshape Medical, Inc. Gastric space filler device, delivery system, and related methods
US9174031B2 (en) 2009-03-13 2015-11-03 Reshape Medical, Inc. Device and method for deflation and removal of implantable and inflatable devices
US8683881B2 (en) 2009-04-03 2014-04-01 Reshape Medical, Inc. Intragastric space fillers and methods of manufacturing including in vitro testing
US9604038B2 (en) 2009-07-23 2017-03-28 Reshape Medical, Inc. Inflation and deflation mechanisms for inflatable medical devices
WO2011011743A2 (en) 2009-07-23 2011-01-27 Reshape Medical, Inc. Deflation and removal of implantable medical devices
EP2480279A4 (en) 2009-09-24 2017-11-15 Reshape Medical, Inc. Normalization and stabilization of balloon surfaces for deflation
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US9149611B2 (en) 2010-02-08 2015-10-06 Reshape Medical, Inc. Materials and methods for improved intragastric balloon devices
EP2539011A4 (en) 2010-02-25 2014-03-26 Reshape Medical Inc Improved and enhanced explant processes and mechanisms for intragastric devices
WO2011127205A1 (en) 2010-04-06 2011-10-13 Reshape Medical , Inc. Inflation devices for intragastric devices with improved attachment and detachment and associated systems and methods
US10137282B2 (en) 2010-11-10 2018-11-27 Mayser, Llc Stretch valve balloon catheter and methods for producing and using same
US11813421B2 (en) 2010-11-10 2023-11-14 Mayser, Llc Stretch valve balloon catheter and methods for producing and using same
JP6301909B2 (en) * 2012-04-24 2018-03-28 メイザー, エルエルシー Stretch valve balloon catheter and method for producing and using the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63264078A (en) * 1987-04-22 1988-10-31 オリンパス光学工業株式会社 Balloon for diet
JPH0413155U (en) * 1990-05-25 1992-02-03

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63264078A (en) * 1987-04-22 1988-10-31 オリンパス光学工業株式会社 Balloon for diet
JPH0413155U (en) * 1990-05-25 1992-02-03

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1977684A1 (en) * 2007-03-16 2008-10-08 Fujinon Corporation Endoscope
WO2014040064A1 (en) * 2012-09-10 2014-03-13 Boston Scientific Scimed, Inc. Catheter with releasable balloon and related methods
US9463106B2 (en) 2012-09-10 2016-10-11 Boston Scientific Scimed, Inc. Catheter with releasable balloon and related methods
CN113350648A (en) * 2021-07-18 2021-09-07 温州医科大学附属第一医院 Tracheal catheter capable of accurately local anesthesia

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