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:
Jan. 17, 1995
Filed:
Oct. 05, 1992
Ronald J Leonard, Ann Arbor, MI (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
A membrane oxygenator is disclosed. The oxygenator has a housing, gas and blood inlets and outlets, and a transfer membrane mechanism for transferring oxygen to blood. The oxygenator has a device for increasing its efficiency. The device maintains the total pressure of the oxygenating gas at each point within gas flow paths near yet below the total pressure of the blood opposite the transfer membrane mechanism generally throughout the oxygenator. The mechanism restricts the flow of oxygenating gas exiting through a oxygenating gas outlet with approximately the pressure of blood exiting through a blood outlet by providing a pressurization fluid with approximately the pressure of the blood exiting through the blood outlet. In a preferred embodiment, the oxygenating gas outlet is situated within the hollow portion of the housing.