US4765339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closed loop dialysis system
Assignee: Solutech Inc
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Filing: 1987-07-29
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Granted: 1988-08-23
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Expires: 2007-07-29
Abstract
Abstract An apparatus and a method of use for removing specified dialyzable components from a complex reference fluid such as, for example, blood. The invention includes a semi-permeable tubular dialysis membrane, which is inserted into the reference fluid. An equilibration fluid is injected into the tubular membrane and allowed to equilibrate with the outside reference fluid. The equilibrated fluid is then removed for analysis.
Inventors
- 👤 Jeffrey S. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:48
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/0002; A61B5/0031; A61B5/07; A61B5/145; A61B5/14525; A61B5/14528; A61B5/68; A61B5/6846; A61B5/6847; A61B5/686; B; B01; B01D; B01D61/00; B01D61/24; B01D61/28; G; G01; G01N; G01N33/00; G01N33/48; G01N33/483; G01N33/487; G01N33/49; G01N33/491
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
204 words
A continuous closed-loop apparatus for equilibrating specified dialyzable components in a complex fluid for analysis comprising: (1) a body portion including an elongated semipermeable tubular dialyzing membrane having a proximal end and a distal end, said body portion being separated into a first and second passageway by a dividing means extending the length of said body portion, said first and second passageways communicating with each other by means of an opening in said dividing means near said distal end of said elongated tubular membrane; (2) a looped reservoir portion comprising a nondialyzable tubular membrane, said membrane having a first end and a second end, said first end being in direct communication with said first body portion passageway and said second end of said reservoir portion being in direct communication with said second body portion passageway thereby effecting a continuous closed loop passageway; (3) membrane solution within said continuous closed loop passageway for receiving said specified dialyzable components from said complex fluid by equilibration; (4) means for effecting membrane solution flow in a defined direction within said apparatus such that said membrane solution receives said specified dialyzable components in said body portion; and (5) means associated with said reservoir portion for analyzing said dialyzable components.
Claim 2
Dependent Claim
204 words
A continuous closed-loop apparatus for equilibrating specified dialyzable components in a complex fluid for analysis comprising: (1) a body portion including an elongated semipermeable tubular dialyzing membrane having a proximal end and a distal end, said body portion being separated into a first and second passageway by a dividing means extending the length of said body portion, said first and second passageways communicating with each other by means of an opening in said dividing means near said distal end of said elongated tubular membrane; (2) a looped reservoir portion comprising a nondialyzable tubular membrane, said membrane having a first end and a second end, said first end being in direct communication with said first body portion passageway and said second end of said reservoir portion being in direct communication with said second body portion passageway thereby effecting a continuous closed loop passageway; (3) membrane solution within said continuous closed loop passageway for receiving said specified dialyzable components from said complex fluid by equilibration; (4) means for effecting membrane solution flow in a defined direction within said apparatus such that said membrane solution receives said specified dialyzable components in said body portion; and (5) means associated with said reservoir portion for analyzing said dialyzable components.
Claim 3
Dependent Claim
13 words
The apparatus according to claim 1, wherein said dialyzing membrane is gas permeable.
Claim 4
Dependent Claim
29 words
The apparatus according to claim 1, wherein said tubular dialyzing membrane is selected from the group consisting of cellulose, dimethyl silicone, methyl-vinyl-polysiloxane, polycarbonate/silicone copolymers, expanded tetrafluoroethylene and expanded polypropylene.
Claim 5
Dependent Claim
27 words
The apparatus according to claim 1, wherein said apparatus is constructed for insertion percutaneously into a blood vessel in a direction extending along the principal axis thereof.
Claim 6
Dependent Claim
34 words
The apparatus according to claim 4, wherein said blood vessel is approximately 3 mm in diameter and said body portion is approximately 2.2 mm in diameter, allowing a 40% opening in the blood vessel.
Claim 7
Dependent Claim
37 words
The apparatus according to claim 1 further comprising a viewing means attached to said reservoir portion, wherein said means for analyzing is a spectrophotometer which analyzes dialyzable components by said viewing means attached to said reservoir portion.
References Cited (Backward Citations)
US3313299A
Cited
US3512517A
Cited
US3572315A
Cited
US3658053A
Cited
US3640269A
Cited
US3649199A
Cited
US3640393A
Cited
US3830106A
Cited
US3893448A
Cited
US4016864A
Cited
US3981297A
Cited
US4016863A
Cited
US4311789A
Cited
US4240912A
Cited
US4265249A
Cited
US4267023A
Cited
US4221567A
Cited
DE3146644A1
Cited
US4516580A
Cited
US4446106A
Cited
US4515584A
Cited
US4694832A
Cited
US4576590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-23 | 1992-02-22 | 1992-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-23 | 1996-02-22 | 1996-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-23 | 2000-02-22 | 2000-08-23 | $7700.00 | Window Closed / Lapsed |