Vascular access device

A vascular access device includes an adapter body having a first end and a second end positioned opposite the first end, the adapter body defining a channel; a conduit received by the adapter body; a needle received by the adapter body, a portion of the needle positioned within the catheter; and a seal assembly including an actuator and a seal body positioned within the passage of the adapter body, the seal body forming a seal with the adapter body, the conduit connected to the seal body, the actuator is configured to move the sealing body from a first position within the adapter body to a second position within the adapter body spaced apart from the first position. The present disclosure allows for improved blood collection and reduced thrombosis around the distal end of the catheter, also reducing the risk of infiltration and exudation, leading to increased patient comfort and the likelihood of extended retention time. 一种血管接入装置，包括：适配器主体，所述适配器主体具有第一端和与所述第一端相对定位的第二端，所述适配器主体限定通道；由所述适配器主体接收的导管；由所述适配器主体接收的针，所述针的