Liquid medicine injection apparatus capable of injecting additional fluid after completion of liquid medicine injection

摘要

A liquid medicine injection apparatus capable of injecting an additional fluid after completion of injection of a liquid medicine is provided. The apparatus includes a cylinder elongated in a direction and having a nozzle formed at one end of the cylinder; a piston installed to be hermetically movable within the cylinder in the direction; an injector provided at the other end of the cylinder to allow the piston to be moved; a fluid tank for storing a fluid in a sealed state; a needle unit disposed between the nozzle and the fluid tank; and a cap member provided between the needle unit and the fluid tank and deformable to allow the needle unit to penetrate the fluid tank.