| 摘要 |
A needle assembly having a hollow needle with a pointed distal end and a proximal end is disclosed. The assembly also includes a needle hub having a distal hub end fixedly connected to the needle, a proximal hub end having an opening, and a passageway extending therethrough between the distal end and the proximal end. A valve is disposed within the passageway, wherein the valve comprises a sealing member having at least one through-opening disposed therein and a plunger disposed proximate the sealing member and slidable between a first position wherein the at least one through-opening is closed such that the hollow needle and the proximal hub end are not in fluid communication with each other and a second position wherein the plunger biases the at least one through-opening to an open position, such that the hollow needle and the proximal hub end are in fluid communication with each other. A method of using the needle assembly is also disclosed.
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