Venous reservoir with improved inlet configuration and integral screen for bubble removal
First Claim
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1. A blood reservoir device comprising:
- a generally flexible blood collection chamber having;
(a) an inlet portion; and
(b) a main portion;
said inlet portion and said main portion being fluidly connected to one another such that blood may pass therebetween;
a blood inflow tube fluidly connected to the inlet portion of the blood collection chamber;
a blood outflow tube fluidly connected to the main portion of the blood collection chamber;
at least one air vent tube fluidly connected to the blood collection chamber to vent air therefrom;
said collection chamber inlet portion having a first blood entry location where blood flows into the inlet portion and a second blood departure location where blood flows out of the inlet portion into the main portion of said collection chamber, said inlet portion being sized and configured such that the cross-sectional area of said inlet portion gradually increases from said first location to said second location so that blood flowing between the first location and the second location is generally laminar and free of excessive turbulence.
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Abstract
A blood reservoir device comprising a generally flexible blood collection chamber having an inlet portion and a main portion. The inlet portion is preferably sized and configured such that blood entering the inlet portion will avoid turbulence and will undergo generally laminar flow through the inlet portion, into the main portion of the chamber. A vent tube is provided for venting coalesced or collected gas bubbles from the top edge of the chamber. Additionally, one or more filter elements may be positioned within the chamber to further facilitate removal of air bubbles from blood passing through the chamber.
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Citations
15 Claims
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1. A blood reservoir device comprising:
- a generally flexible blood collection chamber having;
(a) an inlet portion; and (b) a main portion; said inlet portion and said main portion being fluidly connected to one another such that blood may pass therebetween; a blood inflow tube fluidly connected to the inlet portion of the blood collection chamber; a blood outflow tube fluidly connected to the main portion of the blood collection chamber; at least one air vent tube fluidly connected to the blood collection chamber to vent air therefrom; said collection chamber inlet portion having a first blood entry location where blood flows into the inlet portion and a second blood departure location where blood flows out of the inlet portion into the main portion of said collection chamber, said inlet portion being sized and configured such that the cross-sectional area of said inlet portion gradually increases from said first location to said second location so that blood flowing between the first location and the second location is generally laminar and free of excessive turbulence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- a generally flexible blood collection chamber having;
Specification