Shiley Tracheostomy Tubes, Cuffless With Disposable Inner CannulaShiley Tracheostomy Tubes, Cuffless With Disposable Inner Cannula 2A. Tracheostomy Tube, Cuffless with Disposable Inner Cannula (DCFS) provides the convenience of a Disposable Inner Cannula for a wide variety of applications. 2B. Tracheostomy Tube, Cuffless with Disposable Inner Cannula, Fenestrated (DCFN) provides the convenience of inner cannula disposability, while permitting the patient to breathe through the upper airway if desired. a. Inner