Patent ID: 6569079
Filing Date: 2003-05-27
Classification: A61M

Abstract:
A cardiac ventricular assistance device comprising:a bag selectively adapted for at least first expanding to permit the filling of the bag with at least some of a body of blood flowing towards the bag; the bag selectively adapted for at least second contracting to expel from the bag at least some of the body of blood which has flowed into the bag; means for selectively varying the resistance offered by the bag to filling with at least some of the body of blood; a containing casing enclosing the bag; and a duct leading to the containing casing, the duct permitting the inflow and outflow of a gaseous substance to and from the containing casing following the expansion and contraction of the bag; wherein: the means for selectively varying the resistance offered by the bag comprises: throttling means acting selectively on the duct in at least one of said inflow and outflow directions; and valve means permitting in an essentially unimpeded way flow of said gaseous substance in the other of said inflow and outflow directions.