The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 18, 1989
Filed:
Jun. 25, 1987
Yasushi Joh, Yokohama, JP;
Noriaki Kaneko, Yokohama, JP;
Ube Industries, Ltd., Ube, JP;
Abstract
Disclosed is a medical tube comprising a mono-layer medical tube comprising a high molecular weight compound, wherein the inner texture of a tube wall constituting the tube is porous and no skin layer is present on the inner face of the tube wall. The porous inner texture of the tube is microscopically spongy and contains cells or voids interconnected by pores. The inner wall of the tube contains concavities which open into the cells or voids and communicates them with any fluid flowing through the tube. Disclosed is also a process for producing a medical tube, comprising thrusting forward a core rod having a round cross-section and made of a rigid body from a circular orifice to extrude a solution of a high molecular weight compound from a gap slit defined between the orifice and the core rod in such a manner that the solution is spread over the whole surface of the core rod, and leading the core rod in a solidifying medium to solidify the high molecular weight compound around the core rod, followed by taking out the core rod. The medical tubes of this invention or the medical tubes produced by the present process has excellent compatibility with blood, particularly is suitable for an artificial blood vessel which is required to have excellent long term patency.