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US 6,648,836 B2Granted
Blood gas syringe having improved blood barrier
AssigneeBecton, Dickinson and Company
InventorsRichmond R. Cohen, Preston Keusch
Life of this patent
Estimating the term…
Abstract
A blood gas syringe includes a porous plastic plug having a crosslinked hydrogel affixed to a wall of a passageway of the plug. When a blood sample is taken with the syringe, the incoming sample forces air in the system out through the passageway of the plug until the sample contacts the hydrogel, causing the passageway to seal shut.
Claims5
A syringe comprising:
- a plastic tubular body, and
- a plunger rod slidably and sealingly positioned in the body, the rod comprising a filter that comprises a substrate having a plurality of passageways therethrough and a hydrogel coated on the walls of the passageways.
Dependencies are inferred from the claim text.