A single lumen endobronchial tube for selective mechanical ventilation of the lungs can include a medical tube having a single lumen with an opening at the proximal end of the tube being adapted for connection to an external mechanical ventilation device, and an opening at the distal end being adapted for delivery of a medical gas; a wall extending throughout the tube's entire length having an internal wall surface, an external wall surface and a thickness therebetween, a portion of the wall having an aperture and a shaft adapted to house a mechanism for sealing the aperture; a distal bronchial cuff and at least a first proximal tracheal cuff positioned along the external wall surface and adapted to expand radially outward.