主权项 |
1. A syringe comprising:
a connector body section defining a longitudinal axis and comprising,
a tip portion for fluid ingress and egress; anda gravity-assisted valve comprising a valve body defining an elongated valve cavity generally aligned with the longitudinal axis, a first port operatively coupled to the tip portion, a second port, and a valve member movable between a sealable end of the elongated valve cavity proximal to the first port and a non-sealable end of the elongated valve cavity proximal to the second port; and a barrel section generally aligned with the longitudinal axis and slidably engaged with a plunger, the barrel section defining a fluid reservoir within a volume of the barrel section controllable by an end of the plunger proximal the connector body section, the fluid reservoir operatively coupled to the second port of the gravity-assisted valve, wherein the gravity-assisted valve is configured to allow bidirectional fluid communications between the tip portion and the fluid reservoir when the syringe is oriented with the tip portion pointing in a generally downward direction. |