Fluid collection device with phase separation means

Details Fluid collection device with phase separation means Fluid collection device with phase separation means

1975-12-19

1979-12-25

Sever, Frank

Liquid purification or separation

Gravitational separator

Portable invertible, e.g., milk and cream separator

210DIG23, 233 1A, B01D 2126

Patent

active

041804651

ABSTRACT:
A fluid collection device includes a blood collection tube having a negative pressure therein and sealed at one end by a stopper pierceable by a needle cannula for drawing a blood specimen into the tube for centrifugal separation into a relatively light phase, plasma or serum, and a relatively heavy phase including the blood cells. A quantity of a gel-like mixture of liquid hydrocarbon-polymer, such as polybutene, and an inorganic powder, such as silica powder, is disposed in the tube. The gel-like mixture has a specific gravity intermediate those of the relatively light and heavy phases of the blood so that during centrifugation, the gel-like mixture moves to a position between the phases to provide a partition barrier between them.

REFERENCES:
patent: 3437266 (1969-04-01), Patterson
patent: 3519400 (1970-07-01), Anderson
patent: 3647070 (1972-03-01), Adler
patent: 3852194 (1974-12-01), Zine
patent: 3920549 (1975-11-01), Gigiello et al.
patent: 4021340 (1977-05-01), Zine

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