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Comfort in patients with acute respiratory failure and healthy individuals with and without heated humidifier. Shown are average ratings of comfort in (a) patients with acute respiratory failure and in (b) healthy individuals with the heated humidifier (white bar) and without the heated humidifier (black bar). CPAP, continuous positive airway pressure; CPAPHF, continuous high-flow CPAP; CPAPLF, continuous low-flow CPAP; CPAPVENT, ventilator CPAP.
