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. 11, 1995
Filed:
Nov. 17, 1993
Gary Magram, Wilmington, DE (US);
Other;
Abstract
A cerebrospinal fluid shunt includes an inner tube for supplying the fluid only from brain ventricles to the peritoneum region of a subject and an outer tube arranged so the fluid remains resident in the outer tube without flowing to the peritoneum region. Fluid in the outer tube exerts pressure through a wall of the inner tube on the fluid in the inner tube to regulate flow of the fluid through the inner tube to the peritoneum region. The shunt includes a catheter including plural openings through which the fluid flows. The openings are arranged so tissue growth through the openings does not occlude flow of the fluid within the catheter. The catheter and shunt having an external pressure responsive collapsible wall and an internal spring for inhibiting catheter collapsing and kinking.