Effect of high flow nasal cannula oxygenation on incidence of hypoxia during sedated gastrointestinal endoscopy in patients with obesity: multicentre randomised controlled trial.
Leilei Wang, Yuanyuan Zhang, Dan Han, Mengyun Wei, Jie Zhang, Xiangyang Cheng, Yizhe Zhang, Muyan Shi, Zijian Song, Xiangrui Wang, Xiaoqing Zhang, Diansan Su
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引用次数: 0
Abstract
Objective: To determine whether high flow nasal cannula (HFNC) oxygenation can reduce the incidence of hypoxia during sedated gastrointestinal endoscopy in patients with obesity.
Design: Multicentre, randomised, parallel group trial.
Setting: Three tertiary hospitals in Shanghai, China.
Participants: 1000 adult patients with obesity (body mass index ≥28) who were scheduled for gastrointestinal endoscopy.
Interventions: Participants were randomly allocated to receive regular nasal cannula oxygenation or HFNC oxygenation during a sedated procedure with propofol and low dose sufentanil.
Main outcome measures: The primary outcome was the incidence of hypoxia (75%≤SpO2<90% for <60 s) during the procedure. Secondary outcomes included the incidences of subclinical respiratory depression (90%≤SpO2<95% for any duration) and severe hypoxia (SpO2<75% for any duration or 75%≤SPO2<90% for >60 s) during the procedure.
Results: From 6 May 2021 to 26 May 2023, 984 patients (mean age 49.2 years; 36.9% (n=363) female) completed the study and were analysed. Compared with regular nasal cannula oxygenation, HFNC oxygenation reduced the incidence of hypoxia from 21.2% (103/487) to 2.0% (10/497) (difference -19.14, 95% confidence interval -23.09 to -15.36; P<0.001), subclinical respiratory depression from 36.3% (177/487) to 5.6% (28/497) (difference -30.71, -35.40 to -25.92; P<0.001), and severe hypoxia from 4.1% (20/487) to 0% (0/497) (difference -4.11%, -6.26 to -2.48; P<0.001). Other sedation related adverse events did not differ between the two groups.
Conclusions: In patients with obesity, oxygenation via HFNC during sedated gastrointestinal endoscopy significantly reduced the incidences of hypoxia, subclinical respiratory depression, and severe hypoxia without increasing other adverse events.
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