Two-chambered softshell reservoir
First Claim
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1. A softshell blood reservoir for storing venous blood in an extracorporeal cardiopulmonary circuit, comprising:
- a) a main chamber having a blood inlet and a blood outlet connected thereto to convey blood through said main chamber;
b) a storage chamber having a selectively openable air outlet but communicating only with said main chambers to convey blood to and from said main chamber;
c) a selectable openable fluid passage interconnecting said main chamber and said storage chamber; and
d) a releasable closure member arranged to close said passage when interconnection between said chambers is not desired.
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Abstract
A softshell blood reservoir for heart-lung machines is symmetrical about a central vertical axis and is divided into two chambers: a small main chamber accessed by the blood inlet and outlet connectors, and a larger storage chamber accessed from the main chamber through a selectably closable passage. This arrangement greatly reduces the priming volume of the reservoir without substantially affecting its total capacity, and enhances the mixing of venous and cardiotomy blood.
18 Citations
7 Claims
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1. A softshell blood reservoir for storing venous blood in an extracorporeal cardiopulmonary circuit, comprising:
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a) a main chamber having a blood inlet and a blood outlet connected thereto to convey blood through said main chamber; b) a storage chamber having a selectively openable air outlet but communicating only with said main chambers to convey blood to and from said main chamber; c) a selectable openable fluid passage interconnecting said main chamber and said storage chamber; and d) a releasable closure member arranged to close said passage when interconnection between said chambers is not desired. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification