Fig. 1From: Safety application of muscle relaxants and the traditional low-frequency ventilation during the flexible or rigid bronchoscopy in patients with central airway obstruction: a retrospective observational studyChange in EtCO2 and PaCO2 before and after therapy in patients with CAO. a, Change in EtCO2 before and after procedure (n = 100 in flexible group and n = 57 in rigid group recorded in the anesthesia note). b, Change in PaCO2 before anesthesia and after procedure (n = 18 in flexible group and n = 17 in rigid group recorded in the anesthesia note). Paired t test used in these data, *p < 0.05, Flexible: flexible bronchoscopy treatment; Rigid: rigid bronchoscopy treatmentBack to article page