Patent US4259952A successfully refreshed from Google Patents.
US4259952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood diluting method and apparatus
Assignee: Individual
•
Filing: 1978-06-22
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Granted: 1981-04-07
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Expires: 1998-06-22
Abstract
Abstract An apparatus for diluting packed red blood cells contained in a transfusion bag is provided comprising a flexible, squeezable diluent bag for containing a diluent for diluting the red blood cells in the transfusion bag. A tubular assembly with one or more fittings is provided for permanently attaching the diluent bag to an input port of the transfusion bag. The fittings are adapted for preventing a non-destructive, non-removable separation of the two bags. A uni-directional flow fluid valve means is provided for preventing reverse fluid flow from the transfusion bag to the diluent bag.
Inventors
- 👤 Donald R. Avoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:31
CPC Classifications
A; A61; A61J; A61J1/00; A61J1/14; A61J1/20; A61J1/2089; A61J1/05; A61J1/10; A61J1/2003; A61J1/2006; A61J1/201; A61J1/2013
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
96 words
An apparatus for administering a diluent to a quantity of red blood cells contained in a transfusion blood container having an input port and an output port for transfusing a patient comprising: a flexible, squeezable diluent bag for containing a diluent for red blood cells; means for providing a permanent fluid-tight connection between said diluent bag and said input port of said transfusion blood container in a fluid-tight manner; and means forming a check valve means for preventing a back flow of fluid from said transfusion blood container to said diluent bag through said connecting means.
Claim 2
Independent Claim
96 words
An apparatus for administering a diluent to a quantity of red blood cells contained in a transfusion blood container having an input port and an output port for transfusing a patient comprising: a flexible, squeezable diluent bag for containing a diluent for red blood cells; means for providing a permanent fluid-tight connection between said diluent bag and said input port of said transfusion blood container in a fluid-tight manner; and means forming a check valve means for preventing a back flow of fluid from said transfusion blood container to said diluent bag through said connecting means.
Claim 3
Dependent Claim
36 words
An apparatus according to claim 1 wherein the volume of the diluent bag is approximately 200 cc and the bag is sized and shaped for expressing substantially all of a fluid contained therein by one hand.
Claim 4
Independent Claim
18 words
An apparatus for administering a diluent to a transfusion bag having at least one fitting receiving port comprising:
Claim 5
Independent Claim
18 words
An apparatus for administering a diluent to a transfusion bag having at least one fitting receiving port comprising:
Claim 6
Dependent Claim
78 words
a flexible, squeezable diluent bag for containing a diluent suitable for diluting the contents of the transfusion bag; a tubular member for transporting diluent from the diluent bag to the transfusion bag; a fitting located at one end of the tubular member for permanently connecting the diluent bag to the fitting receiving port of the transfusion bag in a fluid-tight manner; and one-way valve means for preventing reverse fluid flow from the transfusion bag to the diluent bag.
Claim 7
Dependent Claim
78 words
a flexible, squeezable diluent bag for containing a diluent suitable for diluting the contents of the transfusion bag; a tubular member for transporting diluent from the diluent bag to the transfusion bag; a fitting located at one end of the tubular member for permanently connecting the diluent bag to the fitting receiving port of the transfusion bag in a fluid-tight manner; and one-way valve means for preventing reverse fluid flow from the transfusion bag to the diluent bag.
Claim 8
Dependent Claim
51 words
An apparatus according to claim 3 wherein the fitting receiving port of the transfusion bag has a tubular member with an annular shoulder at the interior end thereof extending radially inwardly toward the axis thereof and the fitting comprises a shouldered portion for engaging the annular shoulder of the tubular member.
Claim 9
Dependent Claim
42 words
An apparatus according to claim 4 wherein the fitting comprises a generally conically-shaped member having an inwardly tapered surface extending from the exterior edge of the shouldered portion thereof and a centrally located fluid passageway in fluid communication with the tubular member.
Claim 10
Independent Claim
82 words
A method of diluting the contents of a transfusion bag containing packed red blood cells comprising the steps of: permanently attaching to the transfusion bag a flexible, squeezable diluent bag containing a premeasured amount of diluent suitable for diluting the red blood cells in the transfusion bag; and transferring the contents of the diluent bag to the transfusion bag to dilute the red blood cells contained therein while preventing a back flow of fluid from said transfusion bag to said diluent bag.
Claim 11
Independent Claim
82 words
A method of diluting the contents of a transfusion bag containing packed red blood cells comprising the steps of: permanently attaching to the transfusion bag a flexible, squeezable diluent bag containing a premeasured amount of diluent suitable for diluting the red blood cells in the transfusion bag; and transferring the contents of the diluent bag to the transfusion bag to dilute the red blood cells contained therein while preventing a back flow of fluid from said transfusion bag to said diluent bag.
Claim 12
Dependent Claim
26 words
A method according to claim 6 wherein said step of transferring comprises the step of squeezing the contents of the diluent bag into the transfusion bag.
Claim 13
Dependent Claim
96 words
A method according to claim 6 wherein said step of attaching the diluent bag to a port of the transfusion bag comprises the step of permanently attaching the diluent bag to the transfusion bag by means of a fluid-tight tubular member and a fitting and said step of transferring the contents of the diluent bag to the transfusion bag while preventing a back flow of fluid therefrom comprises the step of squeezing the contents of the diluent bag into the transfusion bag through said fluid-tight tubular member, said fitting and a uni-directional flow fluid valve means.
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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) | 1984-04-06 | 1984-10-06 | 1985-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-06 | 1988-10-06 | 1989-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-06 | 1992-10-06 | 1993-04-07 | $7700.00 | Window Closed / Lapsed |