Asahi Intecc Co., Ltd.

Osamu Katoh

Other

Olympus Corporation

Patentstra Co., Ltd.

C-i-medic Co., Ltd.

Asahi Intec., Ltd.

Tomihisa Kato

Masashi Momota

Kenji Miyata

Naohiko Miyata

Satoshi Nagano

Ichiro Takahashi

Minoru Shinozuka

Tadakazu Kato

Shinji Ozawa

Ryuji Kusuda

Yoshinobu Nakagoshi

Takashi Kato

Kazumi Matsuo

Munechika Matsumoto

Hiroshi Minamihata

Seiji Shimura

Yoshiyuki Arasawa

Taiichiroh Meguro

Kenjiro Uematsu

Toshiya Osawa

In a medical guide wire, a flexible core wireis made of austenitic stainless steel wire treated with a solid solution procedure, and drawn with a whole cross sectional reduction ratio as 80%-97.6%. The core wireand a helical spring bodyare welded by a welding member. The welding memberis made of eutectic alloy having a melting temperature ranging from 180&#xb0; C.-495&#xb0; C. Upon welding the helical spring bodyto the core wirewhich is made of the stainless steel metal, the procedure prevents the medical guide wirefrom sacrificing its mechanical strength by significantly reducing the thermal influence on the core wireand the helical spring body

Medical guide wire, method of making the same, and assembly of balloon catheter and guiding catheter combined with the medical guide wire

In a medical guide wire, a helical spring bodyis made of austenitic stainless steel wire treated with a solid-solution procedure, and tightly drawn with a whole cross sectional reduction ratio as 90%-99.5%. A metallic wire element of the helical spring bodyis heat treated at low temperature within a range in which a tensile rupture strength of the helical spring bodyrapidly increases by partly or totally making use of a conductive heat generated when a core wireand the helical spring bodyare in part bonded by means of a welding member. This makes it possible to improve a mechanical strength property, especially a fatigue-resistant property against a repetitive bending action of the helical spring body

Medical guide wire, an assembly of microcatheter and guiding catheter combined with the medical guide wire, and an assembly of ballooncatheter and guiding catheter combined with the medical guide wire

A catheter device (K, K, Kand K) has a flexible hollow tube body () formed by a plurality of austenitic stainless steel wires () cylindrically stranded to provide a hollow structure. An inner surface of the flexible hollow tube body () has a convex-concave structure represented by the stainless steel wires () to provide helical grooves (). A leading distal end of the flexible hollow tube body () is formed into a knife-edge circle configuration to provide a knife-edge circle front (), thus imparting a perforative capability to improve its quality and performance.

Catheter device

In a medical guide wire, a flexible core wireis made of austenitic stainless steel wire treated with a solid solution procedure, and drawn with a whole cross sectional reduction ratio as 90%-97.6%. Each time when the core wireis subjected to a series of mechanical procedures, the core wireis heat treated repetitively at low temperature subsequent to the mechanical procedures to improve a tensile strength characteristic of the core wire. The core wireis twisted under the low heat treatment. Effectively used is a heat generated from a synthetic layerwhen coating the layeron the helical spring body. This makes it possible to increase the characteristic of the tensile strength of the core wirewith its thermal conductivity taken into consideration. Upon improving the tensile strength of the core wire, optimal conditions are achieved by observing a relationship between the tensile strength and the temperature which the core wireexhibits when tightly drawn as a wrought-out procedure.

Medical guide wire, a method of making the same, an assembly of balloon catheter and guiding catheter combined with the medical guide wire, an assembly of microcatheter and guiding catheter combined with the medical guide wire

There is disclosed a treatment device for an endoscope, comprising a treatment portion in which an operation wire is forward/backward moveably inserted into a main tube of an elongated flexible tube to be inserted into a body, a tip end of the operation wire forms a loop for treatment by itself in a projection state from the main tube, and the loop is adapted to be retractable and storable in the main tube, wherein the treatment portion is formed with a wire rope obtained by integrally intertwining a plurality of side strand wires with a core strand wire, and spiral convex or concave portions continuously disposed along the outer periphery of the wire rope are formed with the side strand wires.

Treatment device for endoscope

In a method of making a guide wireby using a heat mold device, the metallic mold bodyis made from the material, the thermal expansional coefficient of which is the same of a metallic coiled wireto stabilize a shape-forming configuration. A plurality of the mold bodiesare arranged in a mold frameA to make the reverse sideof one mold bodytightly contact with the obverse sideof other mold bodyamong the neighboring mold bodies. A jig armA sandwiches an array of metallic mold bodiesand the side plateto serve as a securement member. Upon manufacturing the guide wirefor use in the medical field, the method of making the heat mold devicecontributes to producing a high quality guide wire with a high productivity.

Method of making a guide wire by using a heat mold device

In a heat mold devicefor a guide wire, the metallic mold bodyis made from the material, the thermal expansional coefficient of which is the same of a metallic coiled wireto stabilize a shape-forming configuration. A plurality of the mold bodiesare arranged in a mold frameA to make the reverse sideof one mold bodytightly contact with the obverse sideof other mold bodyamong the neighboring mold bodies. A jig armA sandwiches an array of metallic mold bodiesand the side plateto serve as a securement member. Upon manufacturing the guide wirewell-suited to the medical field, the heat mold devicerenders it possible to make a high quality guide wire with a high productivity.

Heat mold device and a method of making a guide wire by using the same heat mold device

A medicinal liquid injection catheter includes a flexible main body, a needle-like tubular member, a medicinal liquid supply device, and a balloon. The tubular member is inserted in the main body and an end portion of the tubular member projects from a side hole provided in the main body. The medicinal liquid supply device accommodates a medicinal liquid, and is connected to the tubular member to supply the medicinal liquid through the tubular member. The balloon is attached to an outer portion of the main body and the balloon is expansible in substantially the same direction as a direction in which the portion of the tubular member projects. The medicinal liquid injection catheter additionally includes first and second guide wires. The second guide wire projects from the main body in a direction which intersects a direction in which the first guide wire projects from the main body.

Medicinal liquid injection catheter

In a method of making a metallic thin wire, one single metallic thin wireis prepared to have a predetermined length with a middle portion of the one single metallic thin wireas a fixed portion. Front and rear half portions of the one single metallic thin wireare twisted with a tensile weight W applied to the front and rear half portions in the lengthwise direction. The one single metallic thin wireis processed with a heat treatment to remove a residual stress. This provides the metallic thin wirewith a high rotation-following capability and high torque transmissibility, thus enabling artisans to usefully apply the metallic thin wireto a main wire componentof a medical tool and equipment.

Method of making a metallic thin wire for a medical tool

In a medical guide wire, a core line securement portion () is provided in which the core wire () is fixed to an inner side of the helical coil body () so as to form a top leading end portion () between the core line securement () and the head plug (). A flat plane structure () is formed in which the core wire () of the top leading end portion () gradually changes through stepped portions (S) so that the core wire () progressively reduces its thickness stepwisely while successively increasing its breadth stepwisely as approaching a foremost distal end of the top leading end portion (). This provides an improved flexibility, sensitivity, torsibility and torque transmissibility with the flat plane structure () so as to be accessible to the diseased area with a high detective and ablative ability.

Medical guide wire having a stepwisely thickness-reduced but breadth-increased distal tip structure

Embodiments of the present invention relate to an injection devices that inject a specified reagent with cells into lesions and other areas of body tissue. Particular embodiments comprise a main tube with a projection hole on its exterior, an axially-moveable needle tube with a needle at its tip, a reagent supplier configured to supply a specified reagent into the needle tube, and axially-moveable guide wires.

Reagent injection device

In a medical guide wire, a front end of a core member is tapered off or diametrically reduced successively as it approaches a leading end tip to form a frustoconical configuration. A helical spring and the core member are spaced to form a non-integral zone extending at least 20 mm from a front end of the diameter-reduced front end portion. An inner circumference of the helical spring and an outer circumference of the core member are concentrically secured to form a plurality of securement points aligned in the lengthwise direction at regular spans so as to enable an operator to steer the guide wire with an improved rotation-following capability.

Medical guide wire

In a medical guide wire () formed by a helical hollow wire body which is arranged to retractably move against a needle tip (), the helical hollow wire body is formed into a wire-stranded helical hollow tube () by stranding a multitude of wire coil elements (). The wire coil elements () of a wire-stranded helical hollow tube () has a stranding angle (&#x3b8;) of 55 degrees or less against an axial direction of the wire-stranded helical hollow tube (), and having an angle more than plus 2 degrees or an angle less than minus 2 degrees against a knife edge angle (&#x3b8;) of the needle tip (), thus preventing the wire coil elements () from inadvertently hitched in the needle tip (), and thereby enabling manipulators to a smooth insertion and pull operation so as to improve a curability when the wire-stranded helical hollow tube () is retractably manipulated against the needle tip ().

In a medical guide wire, a rear half of a leading bulge portion (ellipsoidal helical spring)forms a truncated cone shaped front catheter engagement portion. An inner wall of a balloon catheterforms a flared end portionA which absorbably fits into the front catheter engagement portiondue to the physical adhesion so to provisionally connect the balloon catheterto the front catheter engagement portion. The medical guide wireand the balloon catheterare inserted into the blood vessel with one single step procedure when the medical guide wireis introduced into the blood vessel to place the balloon portionat the stricture blood vessel area (P).

Medical device including guide wire and balloon catheter for curing a coronary artery

A wire-stranded hollow coil body () has a multitude of coil line elements () stranded along a predetermined circular line to form a flexible wire tube having a central axial hollow portion (), the flexible wire tube is stranded under a strand-turn resistant load and heat treated to remove a residual stress upon formation so as to provide a high rotation-following capability and a high straightness. Further, a method provides a way to strand the coil line elements () under a strand-turn resistant load while heat treating the coil line elements ().

Growing community of inventors

Aichi-ken, Japan

Tomihisa Kato