A drainage apparatus is described, which is suitable for drawing a liquid from a human body. The drainage apparatus includes a flexible primary tube and at least one flexible secondary tube. The flexible primary tube has a primary flow channel, in which the primary flow channel has a flow exit. The flexible secondary tube is connected to the flexible primary tube, in which the flexible secondary tube has a secondary flow channel communicating with the primary flow channel. The liquid flows through the secondary flow channel and the primary flow channel and is drawn out from the flow exit to decrease number of openings on a human skin for drawing the liquid.本發明係關於一種引流裝置,適用以將液體自人體內引出。此引流裝置包含可撓性主管及至少一可撓性支管。可撓性主管具有主管流道,其中主管流道具有引流出口。可撓性支管連接於可撓性主管,其中可撓性支管具有支管流道,且支管流道連通主管流道。液體經由支管流道與主管流道而自引流出口流出,以減少在人體皮膚上用以引流液體的開口數量。100‧‧‧引流裝置110‧‧‧可撓性主管110a、120a‧‧‧一端111‧‧‧主管流道112‧‧‧引流出口120‧‧‧可撓性支管121‧‧‧支管流道130‧‧‧吸引單元L1、L2‧‧‧長度R1、R2‧‧‧管徑
