High-flow oxygen therapy in tracheostomized patients at high risk of weaning failure

Study protocol timeline. ABG, arterial blood gas analysis; EAdi, diaphragm electrical activity; T-HF 1, first period of high-flow tracheostomy cannula oxygen therapy (1 h); conventional O2, period of conventional low-flow oxygen therapy (1 h); TP, T-piece; T-HF 2, second period of high-flow tracheostomy cannula oxygen therapy (1 h