US3727612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dialysis method and apparatus
Assignee: Individual
•
Filing: 1971-01-18
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Granted: 1973-04-17
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Expires: 1991-01-18
Abstract
Abstract A method of dialytic conditioning of blood in which the blood is continuously circulated through a dialytic exchange member comprising an elongated tubular chamber having at least one semipermeable tubing member longitudinally disposed therein. In a preferred embodiment a plurality of semipermeable tubes are concentrically disposed in the tubular chamber, allowing circulation of blood and one, two or more dialysis fluids simultaneously.
Inventors
- 👤 J Bohorfoush
- 👤 R Sayers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:12
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/24; B01D61/28; A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/1621; A61M1/1649; A61M1/1694; A61M1/1696; A61M1/26; A61M1/267; B01D63/00; B01D63/06; B01D63/069; A61M1/1698; A61M60/00; A61M60/10; A61M60/104; A61M60/109; A61M60/113
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
110 words
A method of dialytic blood conditioning of a patient''s blood in which the blood is continuously removed from the patient''s bloodstream, circulated through a dialytic exchange member and returned to said bloodstream; characterized in that said exchange member comprises inner and outer semipermeable tubing members concentrically disposed in an elongated tubular chamber, said blood being circulated through a first annular space between said tubing members, dialyzing fluids being circulated through the said inner tubing member and a second annular space surrounding said outer tubing member, said dialyzing fluid being returned to a reservoir where it is treated by dialysis with a secondary dialyzing fluid, being circulated from a second reservoir.
Claim 2
Independent Claim
110 words
A method of dialytic blood conditioning of a patient''s blood in which the blood is continuously removed from the patient''s bloodstream, circulated through a dialytic exchange member and returned to said bloodstream; characterized in that said exchange member comprises inner and outer semipermeable tubing members concentrically disposed in an elongated tubular chamber, said blood being circulated through a first annular space between said tubing members, dialyzing fluids being circulated through the said inner tubing member and a second annular space surrounding said outer tubing member, said dialyzing fluid being returned to a reservoir where it is treated by dialysis with a secondary dialyzing fluid, being circulated from a second reservoir.
Claim 3
Dependent Claim
126 words
Apparatus for dialytic conditioning of a fluid comprising: a dialytic exchange member comprising an elongated tubular chamber having at least two concentric semipermeable tubing members, longitudinally and concentrically disposed therein; control and connector means at each end of said exchange member for circulating said fluid through said exchange members for conditioning thereof; dialyzing fluid reservoir means; and flow means connected to said reservoir means and said exchange member for circulating dialyzing fluid from said reservoir means through said exchange member; said reservoir means comprising a first reservoir containing a first dialyzing fluid and a second reservoir containing a second dialyzing fluid, said reservoirs being connected by a flow loop partially comprising a semipermeable exchange membrane whereby dialysis takes place between said first and second dialyzing fluids.
Claim 4
Dependent Claim
126 words
Apparatus for dialytic conditioning of a fluid comprising: a dialytic exchange member comprising an elongated tubular chamber having at least two concentric semipermeable tubing members, longitudinally and concentrically disposed therein; control and connector means at each end of said exchange member for circulating said fluid through said exchange members for conditioning thereof; dialyzing fluid reservoir means; and flow means connected to said reservoir means and said exchange member for circulating dialyzing fluid from said reservoir means through said exchange member; said reservoir means comprising a first reservoir containing a first dialyzing fluid and a second reservoir containing a second dialyzing fluid, said reservoirs being connected by a flow loop partially comprising a semipermeable exchange membrane whereby dialysis takes place between said first and second dialyzing fluids.
Claim 5
Independent Claim
118 words
A method of dialytic conditioning of a patient''s blood in which the blood is continuously removed from the patient''s bloodstream, circulated through a dialytic exchange member and returned to said bloodstream; characterized in that said exchange member comprises inner, intermediate and outer semipermeable tubing members concentrically disposed in an elongated tubular chamber, said blood being circulated through a first annular space between said inner and intermediate tubing members, dialyzing fluids being circulated through the said inner tubing member and a second annular space surrounding said intermediate tubing member, a secondary dialyzing fluid being circulated through a third annular space, said outer tubing member defining the interior thereof, for dialysis of the dialyzing fluid in said second annular space.
Claim 6
Independent Claim
118 words
A method of dialytic conditioning of a patient''s blood in which the blood is continuously removed from the patient''s bloodstream, circulated through a dialytic exchange member and returned to said bloodstream; characterized in that said exchange member comprises inner, intermediate and outer semipermeable tubing members concentrically disposed in an elongated tubular chamber, said blood being circulated through a first annular space between said inner and intermediate tubing members, dialyzing fluids being circulated through the said inner tubing member and a second annular space surrounding said intermediate tubing member, a secondary dialyzing fluid being circulated through a third annular space, said outer tubing member defining the interior thereof, for dialysis of the dialyzing fluid in said second annular space.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |