EP0089748A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Rigid shell expansible blood reservoir, heater and hollow fibre membrane oxygenator assembly
Assignee: Dow Chemical Co
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Filing: 1983-02-21
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Granted: —
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Expires: 2003-02-21
Abstract
Abstract An assembly (10) of a rigid shell expansible blood reservoir (20), heater (40), and hollow fibre membrane oxygenator (60) is integrated into a self-supporting unit. A visible concavity (22) closed by a flexible membrane (24) forms a variable volume liquid and air-tight blood reservoir (20) attached to a blood heater (40) which in turn is attached to a hollow fibre membrane oxygenator (60). The assembly stores, heats, oxygenates and purifies blood by passing oxygen through the lumens of a mat (70) of small diameter gas-permeable hollow fibres supported on a cylindrical core (68) as blood flows over the outside surfaces of the fibres in a small, easy to use, safe, integrated oxygenator (60) which avoids blood contact with ambient air as blood circulates through the assembly.
Inventors
- 👤 Frank Watkins Mather Iii
- 👤 Andreas Preussner
- 👤 Gaylord L. Berry
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 16:23
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/3627; A61M1/14; A61M1/16; A61M1/1621; A61M1/1623; A61M1/1625; A61M1/1629; A61M1/1698; A61M1/3623
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
105 words
A blood reservoir characterised by a self-supporting member (20) having a rigid shell (22) defining a concavity, flexible membrane means (24) secured to said shell (22) in overlying relationship to at least a portion of said concavity and forming with said shell (22) a variable volume liquid tight chamber, said flexible membrane means (24) adapted to interfit with and overlie the inner wall of said concavity of said shell (22) when said chamber is empty and to move to variable positions outwardly from said inner wall as liquid enters said chamber, and blood inlet (30,32) and outlet (34) means integral with said rigid shell (22).
Claim 2
Dependent Claim
105 words
A blood reservoir characterised by a self-supporting member (20) having a rigid shell (22) defining a concavity, flexible membrane means (24) secured to said shell (22) in overlying relationship to at least a portion of said concavity and forming with said shell (22) a variable volume liquid tight chamber, said flexible membrane means (24) adapted to interfit with and overlie the inner wall of said concavity of said shell (22) when said chamber is empty and to move to variable positions outwardly from said inner wall as liquid enters said chamber, and blood inlet (30,32) and outlet (34) means integral with said rigid shell (22).
Claim 3
Dependent Claim
37 words
A blood reservoir as claimed in claim 1 characterised in that said rigid shell (22) is at least partially cylindrical in shape and said blood outlet means (34) is located adjacent the lower end of said chamber.
Claim 4
Dependent Claim
36 words
A blood reservoir as claimed in claim 1 or 2 characterised in that said inlet (30,32) and said outlet (34) blood means are located in spaced apart locations adjacent to the lower end of said chamber.
Claim 5
Dependent Claim
38 words
A blood reservoir as claimed in any preceding claim characterised in that said rigid shell (22) comprises an elongated semicylindrical section terminating in an integral dome shaped section (23) on at least one end of said semicylindrical section.
Claim 6
Dependent Claim
44 words
A blood reservoir as claimed in claim 4 characterised in that said elongated semi-cylindrical section terminates at its upper end in said dome shaped section, and a bubble removal port (81) is located in said dome shaped section (23) adjacent to its upper extremity.
Claim 7
Dependent Claim
69 words
A blood reservoir as claimed in claim 4 characterised in that said elongated semi-cylindrical rigid shell (22) terminates at both its upper and lower ends in integral dome shaped sections (23,25), said inlet (30,32) and outlet (34) means are positioned in spaced apart locations in the wall of said lower dome shaped section (25), and said bubble removal port (81) is located in said upper dome shaped section (23).
Claim 8
Dependent Claim
51 words
A blood reservoir as claimed in any preceding claim characterised in that said blood outlet means (34) comprises a plurality of blood receiving apertures (35) adjacent the lower end of said chamber that are sized and located so as to minimize entrainment of bubbles in the blood exiting from said chamber.
Claim 9
Dependent Claim
52 words
A blood reservoir as claimed in any preceding claim characterised in that said rigid shell (22) includes at least one channel (39) in the inner wall thereof which extends from a point adjacent to the lower end of said chamber to a point adjacent to the upper end of said shell (22).
Claim 10
Dependent Claim
71 words
A blood reservoir as claimed in claim 8 characterised in that said at least one channel (39) is depressed in the inner wall of said semicylindrical section (22) and located in the mid-portion thereof and extends from said blood removal means (34) to a point closely adjacent to the lower end of said chamber, and said bubble removal port (81) is in communication with ---said at least one depressed channel (39).
Claim 11
Dependent Claim
35 words
A blood reservoir as claimed in any preceding claim characterised in that said rigid shell (22) and said flexible membrane means (24) are fabricated from material ranging in light transmitting properties from transparent to translucent.
Claim 12
Dependent Claim
42 words
A blood reservoir as claimed in any preceding claim characterised in that a heat exchanger (40) is secured to the lower end of said reservoir (20), and a blood oxygenator (60) is secured to the lower end of said heat exchanger (40).
Claim 13
Dependent Claim
45 words
A blood reservoir and assembly as claimed in claim 11 characterised in that said blood oxygenator (60) is a hollow fibre oxygenator of the type which flows oxygen through the lumens of the hollow fibres (70) and blood over the outside surfaces of said fibres.
Claim 14
Dependent Claim
67 words
A blood reservoir and assembly as claimed in claim 11 or 12 characterised in that means (35) transfer blood from said reservoir (20) to the top portion of said heater (40), means (62,64) transfer blood from the lower end of said heater (40) to the lower end of said blood oxygenator (60), and means (80) discharge oxygenated blood from the lower end of said blood oxygenator (60).
Claim 15
Dependent Claim
83 words
A blood reservoir and assembly as claimed in claim 11 or 12 characterised in that blood supply means (96) provide venous blood to the lower (64) end of said blood oxygenator, means (Fig. 6) transfer oxygenated blood from exit means (80) adjacent the lower end of said oxygenator (60) to blood inlet means (30) on said reservoir (20), means (35) transfer oxygenated blood from said reservoir (20) to the top portion of said heater (40), and means (97,98) discharge heated and oxygenated blood.
References Cited (Backward Citations)
No citation records indexed.
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