Cardiac valve prosthesis

US4775378A · kind A · utility

Assignee

• B. Braun Melsungen AG · DE

Inventors

• Martin Knoch · Starnberg, DE
• Helmut Reul · St. Blasien, DE
• Gunter Rau · Aachen, DE

Key dates

• Filing date: Jan 20, 1988
• Grant date: Oct 4, 1988
• Expiry date: Jan 20, 2008

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2/2403
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A cardiac valve prosthesis having an S-shaped curve of the closing body along the skeleton line. The inlet area and the outlet area are oriented toward the flow direction, while the opening force is exclusively effective in the central region behind the swivel axis. The S-shaped geometry favors the formation of a stable, closed vortex on the suction side of the closing body with a resultant reduction of deadwater in the aorta ascendens and a more favorable closing behavior. The aortic wall is less stressed, the aorta ascendens is better washed out, and pressure loss in the area of the opening angle is relatively low.