Patent US3274855A successfully refreshed from Google Patents.
Patent US4763658A successfully refreshed from Google Patents.
US4763658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dialysis system 2nd method
Assignee: Solutech Inc
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Filing: 1987-07-29
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Granted: 1988-08-16
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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
2026-10-31 13:36
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: 12
Claim 1
Independent Claim
107 words
An apparatus for equilibrating dialyzable components in a complex fluid which includes a reference fluid and higher molecular weight components, comprising: (1) a body portion including a flexible, elongated tubular semi-permeable dialyzing membrane having a closed distal end and a proximal end, said body portion further including a single first lumen within said dialyzing membrane; (2) means within said first lumen for analyzing said dialyzable components; and (3) fluid communication means adapted to pass a membrane solution to and from said body portion, wherein the dialyzing membrane is freely permeable to the reference fluid and the membrane solution and substantially impermeable to the higher molecular weight components.
Claim 2
Independent Claim
107 words
An apparatus for equilibrating dialyzable components in a complex fluid which includes a reference fluid and higher molecular weight components, comprising: (1) a body portion including a flexible, elongated tubular semi-permeable dialyzing membrane having a closed distal end and a proximal end, said body portion further including a single first lumen within said dialyzing membrane; (2) means within said first lumen for analyzing said dialyzable components; and (3) fluid communication means adapted to pass a membrane solution to and from said body portion, wherein the dialyzing membrane is freely permeable to the reference fluid and the membrane solution and substantially impermeable to the higher molecular weight components.
Claim 3
Dependent Claim
29 words
The apparatus according to claim 1, wherein the dialyzing membrane comprises materials selected from the group consisting of dimethyl silicone, methyl-vinyl-polysiloxane, polycarbonate silicone copolymers, expanded tetrafluorethylene and expanded polypropylene.
Claim 4
Dependent Claim
60 words
The apparatus according to claim 1, wherein said fluid communication means comprises a tubular conduit having a second lumen along the longitudinal axis, said conduit having a first and second end wherein said first end of said conduit is attached to said proximal end of said body portion such that the first and second lumens communicate directly with each other.
Claim 5
Dependent Claim
31 words
The apparatus according to claim 3, further comprising means for injecting and withdrawing said membrane solution into said second lumen, said means for injecting and withdrawing being connected to said conduit.
Claim 6
Dependent Claim
19 words
The apparatus according to claim 4, wherein said second end of said conduit is sealed by a self-sealing means.
Claim 7
Dependent Claim
30 words
The apparatus according to claim 5, wherein said means for injecting and withdrawing said membrane solution is a needle and syringe combination wherein said needle passes through said self-sealing means.
Claim 8
Dependent Claim
21 words
The apparatus according to claim 1, further comprising means with said lumen for maintaining the longitudinal integrity of said body portion.
Claim 9
Dependent Claim
15 words
The apparatus according to claim 1, wherein said analyzing means is an ion selective electrode.
Claim 10
Dependent Claim
18 words
The apparatus according to claim 1, further comprising means for interpreting the information generated by said analyzing means.
Claim 11
Independent Claim
153 words
A method for equilibrating dialyzable components in a complex fluid, which includes a reference fluid and higher molecular weight components, comprising: (1) a body portion including a flexible, elongated tubular semi-permeable dialyzing membrane having a closed distal end and a proximal end, said body portion further including a single lumen within said dialyzing membrane, means within said lumen for analyzing said dialyzable components, and fluid communication means adapted to pass a membrane solution to and from said body portion, wherein the dialyzing membrane is freely permeable to the reference fluid and the membrane solution and substantially impermeable to higher molecular weight components; (2) injecting the membrane solution into said lumen of said tubular membrane; (3) maintaining said membrane solution in said lumen of said tubular membrane for a time sufficient to equilibrate said membrane solution; and (4) analyzing said equilibrated membrane solution by said means within said lumen for analyzing said dialyzable components.
Claim 12
Independent Claim
153 words
A method for equilibrating dialyzable components in a complex fluid, which includes a reference fluid and higher molecular weight components, comprising: (1) a body portion including a flexible, elongated tubular semi-permeable dialyzing membrane having a closed distal end and a proximal end, said body portion further including a single lumen within said dialyzing membrane, means within said lumen for analyzing said dialyzable components, and fluid communication means adapted to pass a membrane solution to and from said body portion, wherein the dialyzing membrane is freely permeable to the reference fluid and the membrane solution and substantially impermeable to higher molecular weight components; (2) injecting the membrane solution into said lumen of said tubular membrane; (3) maintaining said membrane solution in said lumen of said tubular membrane for a time sufficient to equilibrate said membrane solution; and (4) analyzing said equilibrated membrane solution by said means within said lumen for analyzing said dialyzable components.
References Cited (Backward Citations)
US3313299A
Cited
US3512517A
Cited
US3572315A
Cited
US3658053A
Cited
US3640269A
Cited
US3640393A
Cited
US3830106A
Cited
US3888237A
Cited
US3893448A
Cited
US4016864A
Cited
US3957613A
Cited
US3981297A
Cited
US4016863A
Cited
US4311789A
Cited
US4240912A
Cited
US4265249A
Cited
US4267023A
Cited
US4221567A
Cited
US4516580A
Cited
US4446106A
Cited
US4643192A
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) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |