Catheter and method for manufacturing the catheter
A catheter and guide wire technology, applied in the direction of the catheter, etc., can solve the problems such as the decrease of the penetrability of the guide wire and the entry of the coating liquid into the entrance of the guide wire.
Active Publication Date: 2017-03-01
GOODMAN & COMPANY
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- Application Information
AI Technical Summary
Problems solved by technology
However, if the coating liquid is applied entirely from the front end side to the base end side of the guide wire inlet, the applied coating liquid may enter the guide wire inlet due to liquid dripping.
In this case, even if the applied liquid is fixed, it may not be fixed, but may remain in the guide wire inlet as it is, and there is a problem that the penetrability of the guide wire may decrease.
Method used
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Embodiment Construction
[0036] Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In the present embodiment, a balloon catheter provided with a balloon capable of inflating and contracting at the tip portion is embodied. figure 1 It is an overall side view showing the structure of the balloon catheter.
[0037] Such as figure 1 As shown, the balloon catheter 10 includes a catheter shaft 11, a bushing 12 attached to the proximal end (proximal end) of the catheter shaft 11, and a balloon 13 attached to the distal end (distal end) of the catheter shaft 11. .
[0038] The catheter shaft 11 is composed of a plurality of tubular shafts (tube bodies), and has an inner-outer multi-tube structure from at least a midway position in the axial direction (longitudinal direction) to the position of the balloon 13. Specifically, the catheter shaft 11 includes an outer shaft 15 and an inner shaft 16 having a smaller inner diameter and outer diameter than the oute...
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The present invention provides a catheter that can prevent the coating liquid from entering the guide wire inlet when applying a coating liquid to a catheter having a guide wire inlet, and a method for manufacturing the catheter. The balloon catheter has an outer shaft (15) and a balloon. A guide wire entrance (21) is formed in the peripheral wall portion (23) of the outer shaft (15) surrounding the outer tube hole (15a) in the middle of the axial direction. On the outer shaft (15), coating areas (25, 26) with hydrophilic coating applied to the outer surface are respectively provided on both sides sandwiching the guide wire inlet (21) in the axial direction. The second coating area (26) is arranged separately from the guide wire inlet (21) in the axial direction. On the outer axis (15), the area between the second coating area (26) and the guide wire inlet (21) This becomes an uncoated area (27) where no coating is performed on the outer surface.
Description
Technical field [0001] The invention relates to a catheter and a manufacturing method thereof. Background technique [0002] As a method of introducing a catheter into the body, a method using a guide wire is known. In this method, first, a guide wire is passed inside the catheter body constituting the catheter and the passed guide wire is inserted into the body, and then the catheter is introduced into the body along the guide wire inserted into the body. [0003] In addition, in order to pass the guide wire through the inside of the catheter tube, a so-called RX-type catheter is known in which the guide wire is introduced into the tube in the axial direction of the tube more than a halfway position. In this RX-type catheter, a guide wire inlet is formed at a midway position in the axial direction of the catheter tube so as to penetrate the peripheral wall of the tube, and the guide wire is introduced into the catheter tube through the guide wire inlet. [0004] In addition, in or...
Claims
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IPC IPC(8): A61M25/00
CPCA61M25/0015A61M2025/0183A61M25/01A61M25/104
Inventor 水野贵文中川裕树杉浦寿史
Owner GOODMAN & COMPANY