Syringe filling adjustment devices and methods

Abstract

A syringe liquid adjusting device provides a first elongated chamber for reciprocally moving a plunger shaft of a syringe in the syringe barrel to thereby reduce a liquid volume in the syringe barrel from an initial liquid volume to a total liquid volume including a priming liquid volume for priming an infusion line and, in addition, an infusion liquid volume for patient infusion. The syringe liquid adjusting device additionally provides a second elongated chamber for further reciprocally moving the plunger shaft of the syringe in the syringe barrel to further reduce the liquid volume in the syringe barrel from the total liquid volume to the infusion liquid volume while priming the infusion line connected to the syringe with the priming liquid volume. The two elongated chambers may be provided by a one-member, dual-function, device, or by two, separate, members. The one-member device may provide a lengthwise variable elongated chamber.

Dependencies are inferred from the claim text.