Blood collecting needle

Details Blood collecting needle Blood collecting needle

1993-03-18

1994-04-19

Hindenburg, Max

Surgery

Truss

Pad

128771, A61B 500

Patent

active

053037138

ABSTRACT:
A blood collecting needle of the present invention comprises a hollow cannula, both ends of which are sharp tips, and a hub for supporting the center portion thereof. The hub comprises a sheath which surrounds the cannula in a liquid sealed state projecting from the back section of the hub, formed of an elastic body fixedly mounted on the hub, and an air passage connecting the space between the sheath and the cannula with outside air.
As a result, flashback can be reliably confirmed, for example, when the tip of the cannula pierces an intravenous vein.

REFERENCES:
patent: 3648684 (1972-03-01), Barnwell et al.
patent: 3886930 (1975-06-01), Ryan
patent: 4416290 (1983-11-01), Lutkowski
patent: 4416291 (1983-11-01), Kaufman
patent: 4679571 (1987-07-01), Frankel et al.

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