Shielded safety syringe

Details Shielded safety syringe Shielded safety syringe

1988-07-11

1990-04-10

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

128763, A61M 532

Patent

active

049157027

ABSTRACT:
A disposable syringe having particular application to vacuum tube phlebotomy and comprising respective inner and outer needle carrying and protective cylinders which are coaxially aligned and axially extensible relative to one another. The inner and outer cylinders may be locked in a retracted position, whereby a hypodermic needle is accessible for drawing blood samples from the patient to an evacuated tube at the inner cylinder. After the last blood sample has been taken, the inner and outer cylinders may be locked in an axially extended position, whereby the hypodermic needle is completely surrounded and shielded by the outer protective cylinder so as to permit the safe handling of the syringe while avoiding an accidental needle strike and the possible spread of a contagious disease. BACKGROUND OF THE INVENTION

REFERENCES:
patent: 2571734 (1951-10-01), Bastien
patent: 4425120 (1984-01-01), Sampson et al.

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