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A medical guide wire, an assembly body of the same medical guide wire and microcatheter, an assembly body of the same medical guide wire, a balloon catheter and a guiding catheter

A technology of guide wire and coil wire, applied in the direction of catheter, guide wire, coating, etc., to achieve the effect of increasing propulsion

Inactive Publication Date: 2008-01-09
ASAHI INTECC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the above prior art, there is no concept that not only makes good use of the buoyancy in the blood or blood flow, but also utilizes the pressure resistance and specific gravity difference between the double-layer structures in the blood flow to enable the operator to achieve good maneuverability.

Method used

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  • A medical guide wire, an assembly body of the same medical guide wire and microcatheter, an assembly body of the same medical guide wire, a balloon catheter and a guiding catheter
  • A medical guide wire, an assembly body of the same medical guide wire and microcatheter, an assembly body of the same medical guide wire, a balloon catheter and a guiding catheter
  • A medical guide wire, an assembly body of the same medical guide wire and microcatheter, an assembly body of the same medical guide wire, a balloon catheter and a guiding catheter

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Embodiment Construction

[0065] In order to describe these embodiments more specifically, the structures of a medical guide wire and a coil spring body will be described in detail with reference to the accompanying drawings.

[0066] In the following description of the illustrated embodiments, the same reference numerals are used for the same types of structures.

[0067] Figures 1-17 structurally show a medical guide wire according to a first embodiment of the present invention, the medical guide wire 1 is used for the therapeutic treatment of the occlusion area of ​​a coronary artery.

[0068] In this case, the right side of the drawing indicates the distal end side of the medical guide wire 1 , and the left side of the drawing indicates the proximal end side (rear end side) of the medical guide wire 1 unless otherwise specified hereinafter.

[0069] The medical guide wire 1 has an elongated core 2 and a coil spring body 3 into which a distal end portion 21 of the elongated core 2 is concentrically ...

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Abstract

A medical guide wire ( 1 ) has a helical spring body ( 3 ), a distal end portion of which has a radiopaque helical portion ( 31 ), and an elongate core ( 2 ) placed within the helical spring body ( 3 ). The elongate core ( 2 ) has a distal end portion ( 21 ) diametrically thinned and having a proximal end portion ( 22 ) diametrically thickened. A securement portion ( 10 ) is provided in which the distal end of the helical spring body ( 3 ) and the distal end of the elongate core ( 2 ) are air-tightly bonded. A floatage chamber ( 5 ) is formed within the radiopaque helical portion ( 31 ). A synthetic resin layer ( 4 ) coated on an outer surface of the helical spring body ( 3 ) forms a cylindrical film ( 43 ) at a clearance (C) between neighboring coil lines of the helical spring body ( 3 ) in a condition that an outer diameter of the cylindrical film ( 43 ) is smaller than that of the helical spring body ( 3 ) when expanding the helical spring body ( 3 ) in the moistened condition, thus enabling an operator to a deep insertion against a blood vessel due to a buoyance and an increased pressure resistance caused by blood streams.

Description

technical field [0001] The present invention relates to an improved medical guide wire, which enables the operator to insert deeply into tortuous blood vessels and make the best use of the blood flow. Background technique [0002] When performing theranostics on human organs such as blood vessels, digestive tract, urinary tract, etc. in particular, it is necessary to insert the guide wire to the destination before inserting the catheter into the blood vessel. In order to smoothly insert a guide wire into a tortuous blood vessel (a region that is difficult to reach), various techniques have been proposed so far. [0003] Japanese Laid-Open Patent Application No. 2000-135289 discloses by way of example a guidewire having a radiopaque helical metal coil secured to a distal portion of an elongated core. A synthetic resin tube is provided to surround the outer surface of the helical metal coil and cover the outer surface of the metal helical coil when expanded. This allows the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/00A61M25/09
CPCA61M2025/0046A61M2025/09166A61M25/09A61M2025/09091A61M25/01
Inventor 加藤富久
Owner ASAHI INTECC CO LTD
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