Patent US4267837A successfully refreshed from Google Patents.
US4267837A
Expired / Lapsed
US
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Blood collection monitoring device and method
Assignee: Sbr Lab Inc
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Filing: 1979-09-27
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Granted: 1981-05-19
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Expires: 1999-09-27
Abstract
Abstract This invention is directed to apparatus and a method for monitoring the collection of blood from a donor so as to minimize trauma to the blood so collected. The system closely monitors the rate of collection of blood and regulates the rate of mixing of anticoagulant therewith so as to maintain a substantially constant ratio of anticoagulant to blood throughout the collection process. The system also includes built-in warning devices for indicating when the collection process is not proceeding according to a prescribed pattern.
Inventors
- 👤 Robert W. Purdy
- 👤 Don A. Arneson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:56
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/02; A61M1/024; A61M1/36; A61M1/3672; A61M1/0272; A61M2205/00; A61M2205/33; A61M2205/3379; A61M2205/3393; A61M2209/00; A61M2209/08; A61M2209/084
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
187 words
Apparatus for monitoring the collection of blood from a donor into a plastic bag assembly which includes a blood collection bag, an anticoagulant supply bag, a first pliable tube interconnecting the two bags and a second pliable tube connected at one end to the blood collection bag and carrying a needle on its free end for insertion into a vein of the donor and comprising: a horizontal base; an upright support column mounted on said base; a control console disposed in a horizontal plane and mounted on top of said column; a first relatively fixed support for mounting the anticoagulant supply bag beneath said console; a second extendable support for mounting the blood collection bag beneath said console and being movable downward proportionately to the weight of blood and anticoagulant collected; a first manually actuatable hemostat means adapted to receive and restrict the flow of anticoagulant through the first tube; a second manually and electromagnetically actuatable hemostat means adapted to receive and restrict the flow of blood through the second tube; and electrical means effective to actuate said second hemostat means according to prescribed blood collection procedures.
Claim 2
Dependent Claim
187 words
Apparatus for monitoring the collection of blood from a donor into a plastic bag assembly which includes a blood collection bag, an anticoagulant supply bag, a first pliable tube interconnecting the two bags and a second pliable tube connected at one end to the blood collection bag and carrying a needle on its free end for insertion into a vein of the donor and comprising: a horizontal base; an upright support column mounted on said base; a control console disposed in a horizontal plane and mounted on top of said column; a first relatively fixed support for mounting the anticoagulant supply bag beneath said console; a second extendable support for mounting the blood collection bag beneath said console and being movable downward proportionately to the weight of blood and anticoagulant collected; a first manually actuatable hemostat means adapted to receive and restrict the flow of anticoagulant through the first tube; a second manually and electromagnetically actuatable hemostat means adapted to receive and restrict the flow of blood through the second tube; and electrical means effective to actuate said second hemostat means according to prescribed blood collection procedures.
Claim 3
Dependent Claim
65 words
The apparatus of claim 1 including: a longitudinally extendable tape attached to said second support; and resilient means attached to said tape and mounted within said apparatus and adapted to allow longitudinal extension at said tape proportional to the weight of blood and anticoagulant received within the blood collection bag and thereby regulate the mixing of anticoagulant with the blood at a substantially constant ratio.
Claim 4
Dependent Claim
16 words
The apparatus of claim 2 including: detector means for measuring the longitudinal extension of said tape.
Claim 5
Dependent Claim
33 words
The apparatus of claim 1 including: second electrical timing means operable to provide a warning signal indicating that less than some prescribed amount of blood has been collected within a prescribed time interval.
Claim 6
Dependent Claim
23 words
The apparatus of claim 3 including: electrical indicating means actuated by said detector means for announcing the completion of a blood collection procedure.
Claim 7
Dependent Claim
26 words
The apparatus of claim 1 including: first electrical timing means effective to provide an alerting signal a few seconds after manually opening said first hemostat means.
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) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |