losed and continuous low vacuum surgical drainage system, including: Suction bellow 300 ml capacity, with no return valve PVC connecting tube 110 cm. length with closing clamp and connector for drains Collection bag 500 ml. capacity with non return valve, closing cap and cross stop-cock for liquid outlet Advantages: The closed circuit with non return valves and the closing clamp avoid risks of contamination for the patient and the operator Easy checks of the collected liquid thanks to the transparency of the bellow and of the bag Comfort in movements for the patients Cross stop-cock for a secure managing of collection bag Each device is supplied sterile, double packaged.