Patent US6441828B1 successfully refreshed from Google Patents.
Patent EP0046583A1 successfully refreshed from Google Patents.
EP0046583A1
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EP
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Hollow fiber-type artificial lung having enclosed heat exchanger
Assignee: Terumo Corp
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Filing: 1981-08-21
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Granted: —
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Expires: 2001-08-21
Abstract
Abstract A hollow fiber-type artificial lung having an enclosed heat exchanger, having a first housing (1) and a second housing (21) connected together coaxially. A gas exchange chamber (8) is defined in the first housing by a pair of spaced walls (6,7) and a bundle (15) of hollow fibers (5) designed for gas exchange is extended lengthwise and between the pair of walls. The hollow fiber bundle is preferably constricted at the central portion (16) to increase the packing ratio of the hollow fibers. The second housing (21) that is connected to the first housing (1) by way of the blood chamber (38) has a pair of spaced apart walls (26,27), and multiple tubes (25) are provided to extend lengthwise between the pair of walls to effect heat exchange between the circulating heat exchange medium and the blood flowing through the multiple tubes.
Inventors
- 👤 Hiroshi Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 14:09
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/1698; A61M1/1621; A61M1/1623; A61M1/1627; A61M1/1629; A61M1/36; A61M1/3621; A61M1/3623; B; B01; B01D; B01D63/00; B01D63/02; B01D63/021; B01D63/022; B01D63/033; Y; Y10; Y10S; Y10S128/00; Y10S128/03; Y10S261/00; Y10S261/28
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
277 words
L. A hollow fiber-type artificial lung having an enclosed heat exchanger comprising: (a) an oxygenator section, said oxygenator section including a first housing, a bundle of a multiplicity of hollow fibers for gas exchange, said hollow fibers being physically separated from one another and arranged side by side within and along the longitudinal direction of said first housing, first and second walls liquid-tightly carrying said fibers at the end portions with said end portions of said fibers left open and defining an oxygen chamber with the inner wall of said first housing and the outer wall surfaces of said hollow fibers, oxygen inlet and outlet means communicating with said oxygen chamber, and a first blood circulation opening communicating with an interstitial space of the said hollow fibers externally of said first wall, and (b) a multiple tube-type heat exchanger section, said heat exchanger section including a second housing, a multiplicity of tubes physically separated from one another and arranged side by side within and along the longitudinal direction of said second housing, third and fourth walls liquid-tightly carrying said tubes at the end portions, with said end portions left open, and defining a heat exchange medium chamber with the inner wall of said second housing and the outer wall surfaces of said tubes, heat exchange medium inlet and outlet means communicating with said heat exchange medium 'chamber, and a second blood circulatin opening communicating with an interstitial space of said tubes externally of said fourth wall, wherein said oxygenator section and the heat exchanger section are connected together at said first housing and said second housing for defining a blood chamber between said second and third walls.
Claim 2
Dependent Claim
66 words
The hollow fiber-type artificial lung having an enclosed heat exchanger as claimed in claim 1, in which said first and second housings each have connection terminuses of the same diameter, said connection terminuses having external threads advancing in mutually opposite directions, said first and second housings being connected by a threaded connector ring externally of said connection terminuses with a sealing member interposed between said terminuses.
Claim 3
Dependent Claim
64 words
The hollow fiber-type artificial lung having an enclosed heat exchanger as claimed in claim 1, in which said first and second housings have connection terminuses of different diameters, said connection terminuses having external threads advancing in mutually opposite directions, said first and second housings being connected by a threaded connector ring externally of said connection terminuses with a sealing member interposed between said terminuses.
Claim 4
Dependent Claim
64 words
The hollow fiber-type artificial lung having an enclosed heat exchanger as claimed in claims 1 to 3, in which the hollow fiber-type oxygenator section and multiple tube-type heat exchanger section are connected together with a blood chamber interposed therebetween to serve as a buffer, the processing capability of said oxygenator section and that of said heat exchanger section being determined independently of each other.
Claim 5
Dependent Claim
26 words
The hollow fiber-type artificial lung having an enclosed heat exchanger as claimed in claims 1 to 4, in which said hollow fibers are made of polyolefins.
Claim 6
Dependent Claim
41 words
The hollow fiber-type artificial lung having an enclosed heat exchanger as claimed in claim 5, in which said hollow fibers have a mean pore diameter of about 200 to 2000 angstrom units and a porosity of about 20 to 80 percent.
Claim 7
Dependent Claim
47 words
The hollow fiber-type artificial lung having an enclosed heat exchanger as claimed in claims 1 to 6, in which the inner wall of said first housing is formed with a constrictor for constricting the hollow fiber bundle at a mid portion longitudinally of said hollow fiber bundle.
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