Incentive spirometry in tracheostomized patient: Requires a slight modification so that the incentive spirometry tube fits in the tracheostomy tube. The cuff of the tracheostomy tube is to be inflated so that the inspired air completely goes into the lung. 'Y' connector can be connected between the incentive spirometry and the tracheostomy tube, so that one limb of the Y connector is connected to the incentive spirometry and other limb left open to the atmosphere. During inspiration the patient