Patent US4767541A successfully refreshed from Google Patents.
US4767541A
Expired / Lapsed
US
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Method of removing platelets and white cells from a red cell concentrate
Assignee: Bayer Corp
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Filing: 1986-05-19
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Granted: 1988-08-30
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Expires: 2006-05-19
Abstract
Abstract A multiple blood bag system is disclosed having at least two blood bags and conduit means providing sealed flow communication between the bags and a filtering means integrally disposed between two of the bags for removing platelets and white cells from a red cell concentrate in the blood bag system. In the method of the invention a red cell concentrate is provided in one of the blood bags of the above system and an additive solution is mixed therewith. The mixture of the red cell concentrate and additive solution is passed through the filtering means from one of the bags to another.
Inventors
- 👤 Leonard A. Wisdom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:53
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/02; A61M1/0209; A61M1/0218; A61M1/36; A61M1/3621; A61M1/3627; A61M2202/00; A61M2202/04; A61M2202/0413; A61M2202/0427; A61M2202/0429; A61M2202/0439
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
130 words
A method for removing platelets and white blood cells from a red cell concentrate which comprises red blood cells, white blood cells and platelets, the method comprising the steps of-- (a) Collecting the red cell concentrate into the first blood bag of a multiple blood bag system comprising a first bag and a second bag, the second bag containing a red cell storage solution, the system including a filtering means integrally disposed between the two bags; (b) introducing the solution through the filtering means into the first bag containing the red cell concentrate; and then (c) passing the red cell concentrate and solution through the filtering means from the first bag to the second bag under conditions sufficient to remove white blood cells and platelets from the red cell concentrate.
Claim 2
Independent Claim
130 words
A method for removing platelets and white blood cells from a red cell concentrate which comprises red blood cells, white blood cells and platelets, the method comprising the steps of-- (a) Collecting the red cell concentrate into the first blood bag of a multiple blood bag system comprising a first bag and a second bag, the second bag containing a red cell storage solution, the system including a filtering means integrally disposed between the two bags; (b) introducing the solution through the filtering means into the first bag containing the red cell concentrate; and then (c) passing the red cell concentrate and solution through the filtering means from the first bag to the second bag under conditions sufficient to remove white blood cells and platelets from the red cell concentrate.
Claim 3
Dependent Claim
39 words
The method of claim 1 wherein the solution contained in the second blood bag is mixed with the red cell concentrate by passing the solution through the filtering means into the first blood bag containing the red cell concentrate.
Claim 4
Independent Claim
150 words
A method for removing platelets and white cells from a red cell concentrate, which comprises-- (a) collecting blood from a donor into a donor bag of a multiple blood bag system comprising at least two bags having an integral filtering means disposed between the bags, one of the bags being the donor bag and the other bag being a satellite bag which includes a red cell storage solution; (b) treating the collected blood in the donor bag to separate a red blood cell concentrate therefrom, the concentrate including platelets and white cells; (c) mixing the solution from the satellite bag with the red cell concentrate by passing the solution through the filtering means and into the donor bag; and (d) passing the mixture of red cell concentrate and solution through the filtering means from the donor bag to the satellite bag to remove white cells and platelets from the concentrate.
Claim 5
Independent Claim
150 words
A method for removing platelets and white cells from a red cell concentrate, which comprises-- (a) collecting blood from a donor into a donor bag of a multiple blood bag system comprising at least two bags having an integral filtering means disposed between the bags, one of the bags being the donor bag and the other bag being a satellite bag which includes a red cell storage solution; (b) treating the collected blood in the donor bag to separate a red blood cell concentrate therefrom, the concentrate including platelets and white cells; (c) mixing the solution from the satellite bag with the red cell concentrate by passing the solution through the filtering means and into the donor bag; and (d) passing the mixture of red cell concentrate and solution through the filtering means from the donor bag to the satellite bag to remove white cells and platelets from the concentrate.
Claim 6
Dependent Claim
16 words
The method of claim 3 wherein the filtering means comprises a housing containing a filtering medium.
Claim 7
Dependent Claim
23 words
The method of claim 4 wherein the filtering medium is selected from the group consisting of cotton wool, cellulose acetate, and synthetic fibers.
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) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |