A closed automated suction device (CASD) is described. The device is designed to overcome the need for manual suction and to facilitate strict asepsis in patients who are endotracheally intubated or tracheostomied. The device includes an outer tube with an inner tube concentrically nested within to define a cavity therebetween. The inner tube comprises a passage extended therethrough for providing ventilation, and the cavity between the inner and outer tubes is configured for communication with a vacuum source to provide aspiration.