| 摘要 |
PURPOSE:To continuously inject the medical fluid sucked into a syringe into the human body by a prescribed quantity each by providing an elastic pressure means which can execute continuously elastic pressure to a piston from which a shaft bar is removed to a total amount extrusion position after sucking the medical fluid into the syringe, on the inside surface of a cap. CONSTITUTION:A cap 10 is coupled to a base part of a syringe 1. Prior to this coupling, by rotating a shaft 12a by a knob 12b and winding a wire 12c thereto, an elastic pressure means (bamboo shoot-like spring) 11 is fixed to a compressed state by a stopper. In such a state, after the cap 10 is coupled, when the fixation of the elastic pressure means 11 is released by detaching the stopper, the elastic pressure means 11 expands, and presses the back of a piston 3. After reaching such a state, a clamp of a liquid leading tube is released, a medical fluid is filled up to the tip of a syringe or a cannula, and thereafter, the syringe or cannula concerned is coupled to the human body. In such a way, the medical fluid in the syringe l is injected into the human body by a small quantity each.
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