The invention discloses a
cardiac surgery postoperative care drainage device which comprises a drainage device, a
knee joint leg sleeve and an external hanging support, the drainage device is a closed drainage
bottle, scales are arranged outside the drainage device, an openable top cover is arranged on the drainage device, a long tube, a short tube and a sealing sleeve are integrated on the top cover, and the sealing sleeve is used for shielding the long tube and the short tube to prevent infection of the long tube and the short tube. The long tube is connected with the cardiothoracic drainage tube; the
knee joint leg sleeve is worn at a leg joint of a user and used for restraining a cardiothoracic drainage tube when the user walks, the
knee joint leg sleeve comprises a movable support, an upper leg sleeve, a lower leg sleeve and a tube clamp, and the upper leg sleeve and the lower leg sleeve are consistent in structure and connected to the upper end and the lower end of the movable support respectively. The drainage device can be externally hung on the
bed frame at the bottom of the sickbed when a user lies in the sickbed so as to keep the drainage
bottle stable, and can be worn at the knee joint of the user when the user gets out of the
bed and moves, so that the drainage
bottle is guaranteed to be lower than the knee, and the drainage device can be used in the
bed lying environment and the moving environment of the user.