1. The drainage tube from in the wound, the most suitable position for 3 cm away from the wound. 2. The ends of the drainage tube clip to the appropriate length of buried within the wound. 3. Will wound suture and fixed the drainage tube. 4. Cut the needle, according to the thickness of the tube to choose the appropriate drainage bottle of connecting pipe joint, cut in front of the connector can't use the parts. 5. The connection of the well drainage tube and drainage tube connectors. 6. Open the plywood on the drainage device connecting pipe vacuum gravity is established. 7. Check the vacuum drainage device state indicator, compression condition before use. Open the gas control valves, pressure can precisely control the bottle. 8. Drainage on higher vacuum indicator, high negative pressure drainage system will be automatic operation.