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US5421815A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for blood dialysis using anticoagulent composition

Assignee: NOF Corp
•
Filing: 1993-12-14
•
Granted: 1995-06-06
•
Expires: 2013-12-14
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Abstract

Abstract An anticoagulant composition for a blood dialysis circuit contains a fatty acid derivative in liquid form at ambient temperature, and an antioxidant. The antioxidant is contained in an amount of 0.0001 to 5.0 parts by weight relative to 100 parts by weight of the fatty acid derivative. An air trap chamber device for a blood dialysis circuit contains a vessel for storing blood dialysed by a dialysis unit, an inlet tube for introducing the blood treated with dialysis into a liquid in the vessel selected from the group consisting of a layer of the aforementioned anticoagulant composition, and the blood, a measurement unit for measuring the pressure of air in the vessel lying above the layer of the anticoagulant composition, an adjustment unit for adjusting the pressure of the air and an outlet tube for conducting the blood treated with dialysis out of the vessel. A method for blood dialysis involves passing blood taken out of a mammal through the aforementioned vessel in which the blood and air are not in contact with each other, and returning the blood into the mammal.

Inventors

  • 👤 Yasuhisa Noguchi
  • 👤 Toshio Kasama

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 00:51
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3672; A61M1/3621; A61M1/3627; A61M1/3676

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 117 words
A method for blood dialysis comprising the steps of: (a) taking out blood from a body of a mammal; (b) removing toxic materials from the blood by dialysis; (c) introducing the blood treated by dialysis into a liquid in a vessel selected from the group consisting of an anticoagulant composition layer containing 0.0001 to 5.0 parts by weight of an antioxidant and 100 parts by weight of a fatty acid derivative in liquid form at ambient temperature and the blood so that said blood is not in contact with air in said vessel; and (d) returning the blood into said body of the mammal while measuring the air pressure in said vessel for adjusting the blood flow.
Claim 2
Independent Claim 117 words
A method for blood dialysis comprising the steps of: (a) taking out blood from a body of a mammal; (b) removing toxic materials from the blood by dialysis; (c) introducing the blood treated by dialysis into a liquid in a vessel selected from the group consisting of an anticoagulant composition layer containing 0.0001 to 5.0 parts by weight of an antioxidant and 100 parts by weight of a fatty acid derivative in liquid form at ambient temperature and the blood so that said blood is not in contact with air in said vessel; and (d) returning the blood into said body of the mammal while measuring the air pressure in said vessel for adjusting the blood flow.
Claim 3
Dependent Claim 32 words
The method as claimed in claim 1 further comprising a step of percolating said blood in said vessel before returning the blood to the body of the mammal in said step (d).
Claim 4
Dependent Claim 47 words
The method as claimed in claim 1 wherein said fatty acid derivative is selected from the group consisting of a triglyceride of a saturated fatty acid having 6 to 10 carbon atoms, olive oil, safflower oil, soybean oil, corn oil, esters of fatty acids and mixtures thereof.
Claim 5
Dependent Claim 26 words
The method as claimed in claim 3 wherein said triglyceride of the saturated fatty acid is tricaprylin containing a saturated fatty acid having 8 carbon atoms.
Claim 6
Dependent Claim 33 words
The method as claimed in claim 1 wherein said antioxidant is selected from the group consisting of vitamin E, 2,6-dibutyl-p-cresol, 2-butyl-4-hydroxyanisole, epigallocatechin gallate, gallic acid, sesaminol, flavonoids, vitamin A, β-carotene and mixtures thereof.

References Cited (Backward Citations)

US3677710A Cited
US3849071A Cited
US4643715A Cited
US5167921A Cited
US5178763A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1998-06-05 1998-12-05 1999-06-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2002-06-05 2002-12-05 2003-06-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2006-06-05 2006-12-05 2007-06-06 $7700.00 Window Closed / Lapsed

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