Fig. 4From: Continuous positive airway pressure for respiratory support during COVID-19 pandemic: a frugal approach from bench to bedsideClinical study. Effect of FF-CPAP on respiratory rate (a) and SpO2 (b). Respiratory rate and SpO2 were recorded before FF-CPAP initiation and then during the first hour of FF-CPAP therapy (FF-CPCP H1)Back to article page