Protective device for cannula used to draw blood

Details Protective device for cannula used to draw blood Protective device for cannula used to draw blood

1988-10-07

1990-02-13

Hindenburg, Max

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604263, A61M 532

Patent

active

049003100

ABSTRACT:
A protective device for enclosing the scarf of a cannula used to draw blood includes an elongated sheath open at one end and having stop means at the other end. A piston is disposed in the sheath to be slidable between an extended position against the stop means and a retracted position away from the stop means. The piston has a bore extending through it in the direction in which the piston slides. Means are provided for securing an elongated, double-ended cannula in the piston bore so the cannula extends longitudinally through the bore with one end of the cannula in the sheath and the other end of the cannula extending outwardly away from the sheath when the piston is in the extended position. Means are provided for sliding the piston away from the stop means to the retracted position to retract the outwardly extending end of the cannula into the sheath.

REFERENCES:
patent: 2812231 (1957-11-01), Zar
patent: 4425120 (1984-01-01), Sampson et al.
patent: 4475905 (1984-10-01), Himmelstrap
patent: 4573976 (1986-03-01), Sampson et al.
patent: 4643199 (1987-02-01), Jennings et al.
patent: 4643200 (1987-02-01), Jennings
patent: 4723943 (1988-02-01), Spencer
patent: 4772272 (1988-09-01), McFarland
patent: 4790827 (1988-12-01), Haber et al.
patent: 4801295 (1989-01-01), Spencer

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