Single and multiple sample needle assembly with vein entry indic

Surgery – Truss – Pad

Patent

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Details

128766, 604236, 604240, A61B 514

Patent

active

043985440

ABSTRACT:
A single or multiple liquid sample needle assembly is provided. The assembly includes a housing with a receiving chamber having translucent or transparent walls for determining whether access to the sample in question has been achieved. The invention utilizes a porous plug in the chamber which provides, simultaneously, a liquid barrier for the sample received, and gas displacement venting means for gas displaced by the liquid sample received. The assembly may be modified to receive only a single sample for subsequent discharge to a vacuum collection device, or multiple samples for sequential discharge to a plurality of vacuum collection devices. For multiple collection, the assembly incorporates a flexible sleeve and a separate gas discharge opening in combination with the sample discharge opening of the assembly.

REFERENCES:
patent: 3659587 (1972-05-01), Baldwin
patent: 3874367 (1975-04-01), Ayres
patent: 3886930 (1975-06-01), Ryan
patent: 4133304 (1979-01-01), Bailey
patent: 4160383 (1979-07-01), Rauschenberger
patent: 4192919 (1980-03-01), Raghavachari
patent: 4207870 (1980-07-01), Eldridge
patent: 4244378 (1981-01-01), Brignola
patent: 4307731 (1981-12-01), Kaufman
patent: 4340068 (1982-07-01), Kaufman

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