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1. (WO1991007148) HEART VALVE PROSTHESIS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/007148 International Application No.: PCT/DK1990/000287
Publication Date: 30.05.1991 International Filing Date: 08.11.1990
Chapter 2 Demand Filed: 13.06.1991
IPC:
A61F 2/24 (2006.01)
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
F
FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
2
Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
02
Prostheses implantable into the body
24
Heart valves
Applicants:
HASENKAM, John, Michael [DK/DK]; DK
NYGAARD, Hans [DK/DK]; DK
Inventors:
HASENKAM, John, Michael; DK
NYGAARD, Hans; DK
Agent:
LEHMANN & REE; Frederiksberg Allé 26 DK-1820 Frederiksberg C, DK
Priority Data:
5694/8914.11.1989DK
Title (EN) HEART VALVE PROSTHESIS
(FR) PROTHESE DE VALVULES CARDIAQUES
Abstract:
(EN) A heart valve prosthesis (2) of mechanical type and comprising an annular housing (13) wherein the three valves (14) are pivotally mounted about each their respective axes (15) for a symmetrical and synchronous oscillation between an open position (14'') and a closed position (14') is made in such a way that the axes (15) divide each valve (14) into a peripheral part (20) and a central part (21). The axes (15) divide the valves (14) in such a way that the peripheral parts (20) in combination cover an area of the passage (17) of the valve prosthesis (2) which is greater than the area covered by the central parts (21) of the valves (14). Hereby a large central flow is obtained through the central part of the passage (17) together with a large peripheral flow through the peripheral parts of the passage (17). This causes small gradients of velocity to appear when the blood flows through the heart valve prosthesis (2) thereby reducing the risk of thrombi and hemolysis formation.
(FR) Une prothèse (2) de valvules cardiaques de type mécanique, comprenant un logement annulaire (13) dans lequel les trois valvules (14) sont montées pivotantes autour de chacun de leurs axes respectifs (15) pour permettre une oscillation symétrique et synchrone entre une position ouverte (14'') et une position fermée (14'), est réalisée de sorte que les axes (15) divisent chaque valvule (14) en une partie périphérique (20) et une partie centrale (21). Les axes (15) divisent les valvules (14) de sorte que les parties périphériques (20) combinées couvrent une superficie du passage (14) de la prothèse (2) de valvules laquelle est supérieure à la superficie couverte par les parties centrales (21) des valvules (14). Ainsi, on obtient un grand écoulement central dans la partie centrale du passage (17), ainsi qu'un grand écoulement périphérique dans les parties périphériques du passage (17). Cet agencement provoque l'apparition de faibles gradients de vitesse, lorsque le sang s'écoule dans la prothèse (2) de valvules cardiaques, réduisant ainsi le risque de thrombi et la formation d'hémolyse.
Designated States: AU, CA, JP, KR, SU, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
AU1990067353