Syringe with means for automatically sealing a blood sample with

Details Syringe with means for automatically sealing a blood sample with Syringe with means for automatically sealing a blood sample with

1981-07-01

1984-01-10

Dixon, Jr., William R.

Surgery

Truss

Pad

A61B 514

Patent

active

044248172

ABSTRACT:
A syringe for drawing gas-free blood samples is disclosed having a sliding assembly operatively connected to an elongated hollow plunger rod, both the sliding assembly and the plunger rod slideably received within the interior of the tubular body, which is connected to an hypodermic needle. The sliding assembly has longitudinal grooves formed along a portion of the length therein which are in fluid communication with inwardly directed smaller cross section radial channels formed in the sliding assembly. The channels are in further fluid communication with a passageway along the longitudinal axis of the sliding assembly and the hollow elongated plunger. Means for preventing the passage of air back into the syringe once the blood level has reached that position are provided. Means for sealing the blood into the syringe are also provided.

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