Cardiac assists device - has single energy source causing simultaneous rhythmic contraction of two chambers fillable with blood

摘要

The device comprises, in a single functional combination, a first selectively contractible chamber (6) which is intended to be filled with a quantity of blood and is associated with a first valve (8) for admitting the quantity of blood to the first chamber and a second valve (9) for discharging it from it. A second selectively contractible chamber (5) can also be filled with a quantity of blood and has a flow member (12) arranged downstream of the discharge valve (9) of the first selectively contractible chamber (6) with reference to the direction of flow, for enabling the substantially unimpeded passage of blood out of and into the second selectively contractible chamber (5). An operator (24,25 and 26) causes the first (6) and second (5) chambers to contract in synchronism in a substantially pulsed manner. The device includes a common envelope (20) defining the first (6) and second (5) selectively contractible chambers and having a divider (21) which separate the first (6) and second (5) selectively contractible chambers.