Chemistry: physical processes – Physical processes – Crystallization
Patent
1974-04-29
1976-01-20
Serwin, R. E.
Chemistry: physical processes
Physical processes
Crystallization
128 2F, 128 2G, 734252, 734256, 206223, G01N 112, G01N 114, G01N 3316
Patent
active
039334392
ABSTRACT:
This device is for taking a sample of blood from a patient and dispensing a predetermined volumetric sample for analysis. A blood collection needle is in fluid communication with the interior of a closed longitudinally collapsible container such as a bellows having substantially rigid ends. The bellows is elastically compressed from its normally extended position to decrease the interior volume and it is temporarily secured in the compressed position. Once the needle is in place for drawing blood, the bellows is manually released and its elastic extension assists in withdrawing a sample. Samples from the device are dispensed by recompressing the bellows so that some of the blood overflows through a passage into a "ladle" in the top portion of the container. A measured sample is then withdrawn by removing the cap from an outlet tube from the ladle. A plurality of outlet tubes may be used for samples of different predetermined volumes. If desired, an auxiliary sample can be withdrawn by way of a T adjacent the needle. The T can be used for dispensing a sample without measurement or a controlled volume can be dispensed from another exit aperture in related embodiments.
REFERENCES:
patent: 3640388 (1972-02-01), Ferrari
patent: 3645252 (1972-02-01), Gilford
patent: 3785367 (1974-01-01), Fortin et al.
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