NOVEL AUTO-ASPIRATING SYRINGE

摘要

Disclosed are devices for obtaining fluid samples from living creatures. The auto-aspirating syringes are configured with spring such as an elastic band acting as spring pulling back the syringe piston and creating a vacuum at the time of use to draw blood or other fluid into the syringe. Once the spring is energized by pressing the piston into the syringe or stretching it into a stretched state, movement is initiated by disengaging a catch on the piston from a catch pocket in the syringe cylinder wall. In one version the auto-aspirating device is used in conjunction with a holder with forward and reverse facing needles such that the device can be used either employing multiple single syringes to obtain fluid samples or a single syringe is used multiple times with transfer of fluid to other containers in between uses, auto-aspirating syringe vacuum level or additive contents can vary.