Blood-gas syringe

Details Blood-gas syringe Blood-gas syringe

1976-10-26

1977-11-08

Yasko, John D.

Surgery

Truss

Perineal

128DIG5, 128218P, A61B 500

Patent

active

040570525

ABSTRACT:
The disclosure is of an improved blood gas syringe. In one embodiment, the improved syringe comprises a conventional syringe barrel, a plunger and an elastomeric piston at the bottom of the plunger. The plunger extends through and beyond the piston a short distance. The extended portion of the plunger, which is incompressible, serves as a stop means to prevent the piston from being compressed at the bottom of the barrel and to provide a chamber to hold a liquid anti-coagulant. The improved syringe has several advantages over prior art blood gas syringes, such as the obviation of inadvertently drawing air back into the syringe when pressure on the plunger is removed.

REFERENCES:
patent: 718979 (1903-01-01), Campbell
patent: 2666434 (1954-01-01), Ogle
patent: 3985122 (1976-10-01), Topham

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