The invention provides a drainage-assisting unit to connect with a negative pressure wound therapy machine. The drainage-assisting unit includes a disk-shaped part, a first drainage port and a second drainage port. The disk-shaped part consists of transparent material and is attached to a wound. A side of disk-shaped part attached to wound includes plurality of fluid channel. The first drainage port consists of transparent material and is extruded form the disk-shaped part so as to connect with the first drainage tube. A second drainage port consists of transparent material and is extruded from the disk-shaped part so as to connect with the second drainage tube.本發明提出一種引流輔助裝置,用以與一負壓傷口治療機接合。引流輔助裝置包含一盤狀部、一第一引流接埠以及一第二引流接埠。盤狀部為透明物質組成,用以貼合人體傷口區。盤狀部之貼膚面凹陷形成複數流道。第一引流接埠為透明物質組成,由盤狀部向上延伸突出,用以與一第一引流管體接合。一第二引流接埠,為透明物質組成,由盤狀部向上延伸突出,用以與一第二引流管體接合。100‧‧‧引流輔助裝置101‧‧‧方向102‧‧‧方向103‧‧‧方向110‧‧‧第一引流接埠120‧‧‧第二引流接埠130‧‧‧第一引流管體140‧‧‧第二引流管體200‧‧‧傷口區
