An infusion sleeve includes a cylinder body and an infusion tube. The cylinder body and the infusion tube are respectively provided with a dosing valve. The dosing valve includes a base and a hole seat. The base has a through hole and the hole seat Combined with the base, the hole seat is provided with a dosing hole communicating with each other, and a containing chamber, the containing chamber has a valve body, the valve body is provided with an inclined portion and the through hole is blocked under the valve body, An elastic body is sleeved on the valve body, and the inner wall surface of the chamber is sealed and contacted by the elastic force of the elastic body, and a gap is maintained between the valve body and the inner wall surface of the chamber. In order to extend the front end of the syringe into the hole seat and press down the inclined surface of the valve body, the valve body is moved by the action of the inclined surface to open the through hole, so that the medical solution of the syringe can be injected into the infusion through the hole seat and the base The tube or barrel can eliminate the internal cavity of the infusion cannula, reduce the chance of air storage, can greatly reduce the time of exhausting and the pain of repeated blows by fingers, and also reduce the chance of air being introduced into the patient's body, improving patient safety Sex.一種輸液套管，包含一筒體、一輸液管，該筒體、該輸液管分別設有一加藥閥，該等加藥閥包含一底座、一孔座，該底座具有一通孔，該孔座結合於該底座上，該孔座設有相連通之一加藥孔、一容室，該容室中具有一閥體，該閥體上設一斜面部且該閥體下方遮擋該通孔，該閥體套設一彈性體，藉該彈性體之彈性力密封接觸該容室之內壁面，且使該閥體與該容室之內壁面保持一間隙。俾使針筒前端伸入該孔座中下壓該閥體之斜面部，藉由斜面作用而使該閥體移動以打開通孔，使針筒之藥液可經由孔座、底座注射入輸液管或者筒體，可以消除輸液套管內部空腔，降低空氣儲留的機會，可大幅度降低排氣的時間及手指重複敲打排氣的疼痛，也減少空氣導入病人體內的機會，增進病人安全性。
