Abstract: A medical drainage tube for treating wounds with negative pressure includes a suction tube, a suction connector, and a ventilation sleeve. The suction tube includes a suction lumen, and a ventilation lumen including a lumen outer wall and an opening. The ventilation sleeve is arranged at the opening to surround the suction tube. The ventilation sleeve includes a sleeve wall including a sleeve inner wall arranged towards the suction tube, an annular groove arranged in the sleeve inner wall, a filter compartment arranged in the sleeve wall, a bacterial filter arranged in the filter compartment, and an air inlet arranged in the filter compartment. The annular groove communicates with the opening. The bacterial filter communicates with the annular groove. The air inlet connects the bacterial filter with the atmosphere. A part of the ventilation lumen between the annular groove and a proximal end of the suction tube is sealed off.

Abstract: A medical drainage tube for treating wounds with negative pressure includes a suction tube, a suction connector, and a ventilation sleeve. The suction tube comprises a suction lumen, and a ventilation lumen comprising a lumen outer wall and an opening. The ventilation sleeve is arranged at the opening to surround the suction tube. The ventilation sleeve comprises a sleeve wall comprising a sleeve inner wall arranged towards the suction tube, an annular groove arranged in the sleeve inner wall, a filter compartment arranged in the sleeve wall, a bacterial filter arranged in the filter compartment, and an air inlet arranged in the filter compartment. The annular groove communicates with the opening. The bacterial filter communicates with the annular groove. The air inlet connects the bacterial filter with the atmosphere. A part of the ventilation lumen between the annular groove and a proximal end of the suction tube is sealed off.