Results
hypoxemia, hypoxia, PtcCOSequence, hypercapnia
HYPOXIA, SECONDARY
A total of 80 patients were enrolled and randomized to the NHF group (CONSORT flow chart. NHF: Nasal high flow, LFO: Low-flow oxygen via a nasal cannula, PtcCOThe demographic data of patients in each groupValues are


In primary outcome analysis, the incidence of marked hypercapnia during an ERCP procedure under sedation was observed in 1 patient (2.7%) in the NHF group and in 7 patients (18.4%) in the LFO group; statistical significance was found in the risk difference (risk difference: -15.7%, 95% CI -29.1 – -2.4, Primary and secondary endpointsDuration of hypercapnia (min)(PtCOIncident of hypoxia (SpO(the proportion of patients experiencing an SpOValues are 








In secondary outcome analysis, the mean (SD) total PtcCOSequence of PtcCOThe incidence of hypoxemia during an ERCP procedure under sedation was observed in 3 patients (8.1%) in the NHF group and 2 patients (5.3%) in the LFO group, with no significant difference (risk difference: -2.8%, 95% CI -8.5 – 14.2; risk ratio: 1.54, 95% CI 0.27 – 8.70; The depth of sedation (Ramsay score) was not significantly different between the two groups [median (range) for the NHF group: 5 (4 – 6); median (range) for the LFO group: 5 (4 – 6); 