Low-flow apnoeic oxygenation for laryngeal surgery: a prospective observational study. O’Loughlin CJ, Phyland DJ, Vallance NA, Giddings C, Malkoutzis E, Gunasekera E, Webb A, Barnes R. Anaesthesia. 2020 Aug;75(8):1070-1075. doi: 10.1111/anae.14959.