Three Mode Suction, Thoracic Suction and Intermittent Suction at Songklanakarind Hospital are reached preventive maintenance period on 16th-17th September, 2020. Our service teams and Product Specialist performed calibration to each Suction in order to check whether the suctions are in the good condition per manufacturer standard. Therefore, the regarding suctions are ready for used in a good condition as well as safety.