Physiological effects of titrated oxygen via nasal high‐flow cannulae in <scp>COPD</scp> exacerbations: <scp>A</scp> randomized controlled cross‐over trial

Abstract

Short-term use of NHF results in a small reduction in PtCO₂ compared with SNP in patients with acute exacerbations of COPD, but whether this is clinically significant is uncertain.