US4925555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrafiltering hybrid artificial organ
Assignee: Individual
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Filing: 1988-05-05
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Granted: 1990-05-15
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Expires: 2008-05-05
Abstract
Abstract An artifical hybrid organ or gland is formed from two serially-interconnected chambers, the first of which comprises an ultrafiltration chamber which forms an ultrafiltrate from the blood stream applied to it and the second of which comprises a cell exchange chamber which, though immunologically isolated by microporous membranes, receives both the bloodstream and the ultrafiltrate and which rapidly exchanges selected constituents with both before they recombine in order to provide a corrected physiological response to constituents in the blood. Additionally, an optional excretory duct may be employed to channel a portion of the treated ultrafiltrate away from the bloodstream.
Inventors
- 👤 Theodore E. Spielberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:48
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/34; A61M1/3472; A61F; A61F2/00; A61F2/02; A61F2/022; A61M1/3475; A61M1/3486; A61M1/3489; A61M1/36; A61M1/3687; A61M1/3689
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
101 words
An ultrafiltering hybrid artificial organ or gland, comprising A. means forming an ultrafiltration chamber for receiving blood from a source and forming therefrom a first fraction comprising blood cells and proteins and a second fraction free of said blood cells and proteins, B. means forming a cellular exchange chamber separate from, and serially connected to, said ultrafiltration chamber for receiving said first and second fractions in the separated state and configured to contain a cellular exchange medium for separately contacting said first and second fractions for treatment thereof by exchanging selected constituents therewith, and c. means for recombing the treated fractions.
Claim 2
Dependent Claim
101 words
An ultrafiltering hybrid artificial organ or gland, comprising A. means forming an ultrafiltration chamber for receiving blood from a source and forming therefrom a first fraction comprising blood cells and proteins and a second fraction free of said blood cells and proteins, B. means forming a cellular exchange chamber separate from, and serially connected to, said ultrafiltration chamber for receiving said first and second fractions in the separated state and configured to contain a cellular exchange medium for separately contacting said first and second fractions for treatment thereof by exchanging selected constituents therewith, and c. means for recombing the treated fractions.
Claim 3
Dependent Claim
48 words
An ultrafiltering hybrid artificial organ or gland according to claim 1 in which said means forming a cellular exchange chamber includes a microporous membrane transfer means for transferring said constituents across said membrane for exchange with at least said blood fraction therethrough to form said treated blood fraction.
Claim 4
Dependent Claim
33 words
An ultrafiltering hybrid artificial organ or gland according to claim 2 which includes means for directly intermixing said treated ultrafiltrate and said treated blood fraction after their exposure to said cellular exchange medium.
Claim 5
Dependent Claim
60 words
An ultrafiltering hybrid artificial organ or gland according to claim 2 in which said cellular exchange chamber receives said ultrafiltrate for direct contact with said cellular exchange medium and includes means forming a first microporous membrane-enclosed channel for passage of said blood fraction therethrough and for exchange of constituents with both said exchange medium and said ultrafiltrate through said membrane.
Claim 6
Dependent Claim
62 words
An ultrafiltering hybrid artificial organ or gland according to claim 1 in which said means forming a cellular exchange chamber includes means forming a first microporous membrane-enclosed channel for passage of said blood fraction therethrough, and a second microporous membrane-enclosed channel for passage of ultrafiltrate therethrough, said channels being positioned for contact with said cellular exchange medium within said cellular exchange chamber.
Claim 7
Dependent Claim
35 words
An ultrafiltering hybrid artificial organ or gland according to claim 1 which includes flow means for altering the ratio of ultrafiltrate flow to blood fraction flow applied to said means forming a cellular exchange chamber.
Claim 8
Dependent Claim
43 words
An ultrafiltering hybrid artificial organ or gland according to claim 6 which comprises means for shunting a portion of the blood from said source around said means forming an ultrafiltration chamber prior to its application to said means forming a cellular exchange chamber.
Claim 9
Dependent Claim
32 words
An ultrafiltering hybrid artificial organ or gland according to claim 6 which comprises shunting a portion of the blood fraction from said ultrafiltration chamber around said means forming a cellular exchange chamber.
Claim 10
Dependent Claim
29 words
An ultrafiltering hybrid artificial organ or gland according to claim 6 which comprises means for shunting a portion of the ultrafiltrate around said means forming a cellular exchange chamber.
Claim 11
Dependent Claim
28 words
An ultrafiltrating hybrid artificial organ or gland according to claim 6 containing an excretory duct to drain a portion of the treated ultrafiltrate away from the blood stream.
Claim 12
Dependent Claim
28 words
An ultrafiltering hybrid artificial organ or gland according to claim 1 containing an excretory duct to drain a portion of the treated ultrafiltrate away from the blood stream.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |