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:
Nov. 26, 1991
Filed:
Mar. 20, 1990
Robert A Ersek, Austin, TX (US);
Arthur A Beisang, Arden Hills, MN (US);
Arthur A Beisang, III, Shoreview, MN (US);
Bioplasty, Inc., St. Paul, MN (US);
Abstract
An improved bio-osmotic gel for filling implant lumens consisting substantially of an amount of a bio-compatible organic polymer and a solution of bio-compatible salt is disclosed which exhibits osmotic qualitites closely paralleling that of human body serum and improved radiolucency with respect to silicone oil and saline. The bio-osmotic gel can contain a polymer having the empirical formula [(CHCH.sub.2).sub.2 N(CH.sub.2).sub.3 CO].sub.n i.e. polyvinylpyrrollidone. The bio-compatible salt can be made of a low Z value salt such as sodium bicarbonate, sodium acetate, or sodium lactate. The gel material should have an osmolarity between 250 and 350 milliosmoles and have an X-ray absorption under standard exposure approximately equal to that of breast tissue such that processed mammographic X-ray film will have an optical density of 1.2 to 1.3 and an average penetrance of between 9.2 and 30.0 milliroentgens.