弁付血液導管を備えた心室補助用具及び製法

Japanese Patent JP3680949

B2

A ventricular assist device includes a pair of valved conduits and a pumping portion connected by these conduits into the circulatory system of a host patient. The pumping portion and valved conduits are constructed and configured to minimize the number of material-surface transitions which blood must cross in flowing through the device. Also, the valved conduits include porcine xenograft valves, which are externally supported by stenting structure located outside of the blood-contacting flow path of the device. A flexible shape-retaining inner wall member of the valved conduits is impervious to blood, but defines a porous inner surface on which a stable biological interface may form. Also, this inner wall member is shaped with sinuses which do not replicate either the porcine sinuses from which the xenograft valves were taken, or human aortic sinuses. However, the sinuses of the inner wall member are configured to provide effective valve action by the formation of vigorous vortices in the blood flow downstream of these valves, and to avoid the formation of clots on the blood-contacting surfaces of the valved conduits.

JP2009509629	Hybrid bifurcated stent
WO2001017456	CONDUIT DESIGNS AND RELATED METHODS FOR OPTIMAL FLOW CONTROL
WO/2000/035378	CANNULA STENT

Woodard, John Sea
Greenberg, Sheldon Eye
Ness, Ronald A.
Romley, Ronald M
Nguyen, Sun
Chen, Herbert

JP52082295A

August 10, 2005

February 06, 1995

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World Heart Corporation

A61F2/06; A61F2/24; A61M1/10; A61M1/12; A61M1/36; (IPC1-7): A61M1/12; A61F2/06; A61F2/24

JP3127378B2

US4222127
WO1993020757A1

Hidesaku Yamamoto
Takaaki Yasumura
Natsuki Morishita

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