Blood/gas separator and flow system
First Claim
1. A venous and cardiotomy blood reservoir comprising:
- a housing defining at least two separate compartments, with a second of said compartments being positioned above the first of said compartments, said housing including separate inlet and outlet ports communicating respectively with each of said compartments;
connecting means coupled to said inlet ports of a first of said compartments and said outlet ports of a second of said compartments;
a flexible bag means positioned in said housing first compartment for receiving blood through said inlet ports of said first compartment, said bag means being securely mounted in said compartment to restrict expansion of said bag means as said blood enters through said inlet ports, said bag means having a first end including a porous screen through which blood flows out of said bag means, and a second opposite end including a porous defoamer means which is at least partially coated with an antifoam material, with said partially coated portion being positioned above a maximum blood level in said reservoir;
a porous element positioned in said second compartment between said inlet and outlet ports, said porous element being coated with an antifoaming material;
a plate mounted in said housing to which said bag means is securely mounted along its edges;
said first bag means end being positioned at a level to lie partially below a minimum blood level in said reservoir;
said bag means being an elongated flexible bag which is mounted in said housing with said first end being positioned horizontally below said second end;
said screen having a porosity of from about forty to about two hundred microns;
said porous defoamer means having a porosity of from about four hundred to about eighteen hundred microns; and
said connecting means comprising a tube fitting means which connects to said inlet port of said first compartment and a flexible tubing connected to said tube fitting means and said outlet port of said second compartment.
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Accused Products
Abstract
A blood reservoir is formed with a hard outer shell housing defining at least one blood compartment. A flexible bag is mounted in the outer shell and is connected to the reservoir inlet port to allow blood to directly enter the flexible bag. The bag includes two oppositely positioned ends, one of which includes a mircoporous screen and is situated to lie partially below a minimum level attained by blood in the reservoir. The second bag end is substantially open, and includes a porous element partially coated with an antifoaming agent. The coated portion of the element is positioned above a maximum level attained by the blood in the hard shell. The potential of excessive mixing between the blood and air is reduced by controlling the expansion of the bag during blood flow.
130 Citations
59 Claims
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1. A venous and cardiotomy blood reservoir comprising:
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a housing defining at least two separate compartments, with a second of said compartments being positioned above the first of said compartments, said housing including separate inlet and outlet ports communicating respectively with each of said compartments; connecting means coupled to said inlet ports of a first of said compartments and said outlet ports of a second of said compartments; a flexible bag means positioned in said housing first compartment for receiving blood through said inlet ports of said first compartment, said bag means being securely mounted in said compartment to restrict expansion of said bag means as said blood enters through said inlet ports, said bag means having a first end including a porous screen through which blood flows out of said bag means, and a second opposite end including a porous defoamer means which is at least partially coated with an antifoam material, with said partially coated portion being positioned above a maximum blood level in said reservoir; a porous element positioned in said second compartment between said inlet and outlet ports, said porous element being coated with an antifoaming material; a plate mounted in said housing to which said bag means is securely mounted along its edges; said first bag means end being positioned at a level to lie partially below a minimum blood level in said reservoir; said bag means being an elongated flexible bag which is mounted in said housing with said first end being positioned horizontally below said second end; said screen having a porosity of from about forty to about two hundred microns; said porous defoamer means having a porosity of from about four hundred to about eighteen hundred microns; and said connecting means comprising a tube fitting means which connects to said inlet port of said first compartment and a flexible tubing connected to said tube fitting means and said outlet port of said second compartment. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A cardiotomy and venous blood reservoir device comprising:
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a rigid housing defining an upper compartment and a lower compartment therewithin; said upper compartment having a cardiotomy blood inlet, a cardiotomy blood outlet and a cardiotomy blood filter element disposed therein between the cardiotomy blood inlet and the cardiotomy blood outlet such that cardiotomy blood entering the upper compartment through the cardiotomy blood inlet will pass through said cardiotomy filter element prior to exiting the upper compartment through the cardiotomy blood outlet; said lower compartment having a flexible bag positioned therewithin, said flexible bag having a top end, a bottom end, a blood inlet, a blood outlet and a microporous screen element positioned between the blood inlet and the blood outlet such that blood entering the flexible bag through the blood inlet will pass through the microporous screen element prior to exiting the flexible bag through the blood outlet; the blood outlet of the flexible bag positioned within the lower compartment being located such that blood passing out of said blood outlet will collect inside of said lower compartment outside of said flexible bag; a blood outlet port formed in the bottom of the lower compartment below the bottom of said flexible bag to permit blood passing out of the flexible to subsequently drain out of the lower compartment. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 56, 57)
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33. A blood reservoir device for receiving, filtering and combining cardiotomy blood and venous return blood in an extracorporeal blood oxygenation circuit, said device comprising:
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a rigid housing defining an upper compartment and a lower compartment therewithin; a cardiotomy blood inlet and a cardiotomy blood outlet formed in the upper compartment; a cardiotomy blood filter disposed within the upper compartment between the cardiotomy blood inlet and cardiotomy blood outlet such that blood entering the cardiotomy blood inlet will pass through the filter prior to exiting the upper compartment through the cardiotomy blood outlet; a flexible bag disposed within the lower compartment, said flexible bag having a top end, a bottom end, a blood inlet, a blood outlet and a microporous screen element positioned between the blood inlet and the blood outlet such that blood entering the flexible bag through the blood inlet will pass through the microporous screen element prior to exiting the flexible bag through the blood outlet; the blood inlet of the flexible bag being fluidly connected to the cardiotomy blood outlet of the upper compartment and concurrently fluidly connectable to a source of venous return blood such that filtered cardiotomy blood from the upper compartment may combine with venous return blood within the flexible bag; and a blood outlet port formed in said lower compartment to permit blood which exits the flexible bag and collects outside of said flexible bag to subsequently pass out of said lower compartment. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 58, 59)
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Specification