{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T16:22:51Z","timestamp":1789662171638,"version":"4.0.1"},"reference-count":73,"publisher":"BMJ","license":[{"start":{"date-parts":[[2025,8,19]],"date-time":"2025-08-19T00:00:00Z","timestamp":1755561600000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ"],"accepted":{"date-parts":[[2025,6,9]]},"abstract":"<jats:title>Abstract<\/jats:title>\n          <jats:sec>\n            <jats:title>Objectives<\/jats:title>\n            <jats:p>To evaluate the effect of lateral versus supine positioning on incidence of hypoxaemia in sedated patients and to provide evidence based recommendations for respiratory strategies.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Design<\/jats:title>\n            <jats:p>Prospective, multicentre, randomised controlled trial.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Setting<\/jats:title>\n            <jats:p>14 tertiary hospitals in China, July to November 2024.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Participants<\/jats:title>\n            <jats:p>2159 adults (\u226518 years) who underwent sedation.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Interventions<\/jats:title>\n            <jats:p>Sedated patients were randomly assigned (1:1) to receive either lateral positioning or conventional supine positioning, stratified by study centres.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Main outcome measures<\/jats:title>\n            <jats:p>\n              The primary outcome was incidence of hypoxaemia (peripheral oxygen saturation (SpO\n              <jats:sub>2<\/jats:sub>\n              ) \u226490%) within the first 10 minutes after positioning. Secondary outcomes included airway rescue interventions, incidence of severe hypoxaemia (SpO\n              <jats:sub>2<\/jats:sub>\n              \u226485%), lowest oxygen saturation recorded, length of stay in the post-anaesthesia care unit, and safety measures (eg, bradycardia, tachycardia, hypotension, new onset arrhythmia). Analyses were performed on an intention-to-treat basis.\n            <\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results<\/jats:title>\n            <jats:p>\n              Of 2159 patients randomised, 2143 were included in the primary analysis. The mean age of the patients was 53.1 years, mean body mass index was 23.9, and 53.7% (1150\/2143) were women. The incidence of hypoxaemia was significantly lower in the lateral group compared with supine group (5.4% (58\/1073)\n              <jats:italic>v<\/jats:italic>\n              15.0% (161\/1070); adjusted risk ratio 0.36, 95% confidence interval (CI) 0.27 to 0.49; P&lt;0.001). Compared with patients in the supine group, patients in the lateral group required fewer airway rescue interventions (6.3% (68\/1073)\n              <jats:italic>v<\/jats:italic>\n              13.8% (148\/1070); adjusted risk ratio 0.46, 0.34 to 0.61; P&lt;0.001), had a lower incidence of severe hypoxaemia (0.7% (8\/1073)\n              <jats:italic>v<\/jats:italic>\n              4.8% (51\/1070); adjusted risk ratio 0.16, 0.07 to 0.33; P&lt;0.001), and had a higher mean lowest SpO\n              <jats:sub>2<\/jats:sub>\n              level (96.9%\n              <jats:italic>v<\/jats:italic>\n              95.7%, absolute adjusted mean difference 1.20%, 95% CI 0.87% to 1.54%; P&lt;0.001). Additionally, length of stay in the post-anaesthesia care unit was shorter in the lateral group (38.2\n              <jats:italic>v<\/jats:italic>\n              40.5 minutes; absolute adjusted mean difference \u22122.22 minutes; 95% CI \u22123.63 to \u22120.80; P=0.002). Safety outcomes were comparable between the groups, but tachycardia was less frequent in the lateral group.\n            <\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusions<\/jats:title>\n            <jats:p>Placing sedated adults in the lateral position significantly reduces the incidence and severity of hypoxaemia and decreases the need for airway rescue interventions without compromising safety. Given its simplicity and low cost, lateral positioning could offer advantages in remote or resource constrained clinical settings. Further replication studies targeting patients with advanced age and high body mass index are needed to improve the generalisability of the findings.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Trial registration<\/jats:title>\n            <jats:p>\n              ClinicalTrials.gov\n              <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"NCT06459167\" ext-link-type=\"clintrialgov\">NCT06459167<\/jats:ext-link>\n              .\n            <\/jats:p>\n          <\/jats:sec>","DOI":"10.1136\/bmj-2025-084539","type":"journal-article","created":{"date-parts":[[2025,8,19]],"date-time":"2025-08-19T10:40:17Z","timestamp":1755600017000},"page":"e084539","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":8,"title":["Effect of lateral versus supine positioning on hypoxaemia in sedated adults: multicentre randomised controlled trial"],"prefix":"10.1136","volume":"390","clinical-trial-number":[{"clinical-trial-number":"nct06459167","registry":"10.18810\/clinical-trials-gov"}],"author":[{"given":"Hui","family":"Ye","sequence":"first","affiliation":[{"name":"Department of Anaesthesiology and Intensive Care, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 311121, China"},{"name":"The Children\u2019s Hospital, School of Medicine, National Clinical Research Centre for Child Health, Zhejiang University, Hangzhou, Zhejiang Province, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Li-Hua","family":"Chu","sequence":"additional","affiliation":[{"name":"Department of Anaesthesiology and Intensive Care, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 311121, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guo-Hao","family":"Xie","sequence":"additional","affiliation":[{"name":"Department of Anaesthesiology and Intensive Care, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 311121, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ye-Jing","family":"Hua","sequence":"additional","affiliation":[{"name":"Department of Anaesthesiology and Intensive Care, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 311121, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yi","family":"Lou","sequence":"additional","affiliation":[{"name":"Department of Anaesthesiology and Intensive Care, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 311121, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qiao-Hong","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Anaesthesiology and Intensive Care, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 311121, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhi-Xin","family":"Xu","sequence":"additional","affiliation":[{"name":"Department of Anaesthesiology and Intensive Care, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 311121, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Meng-Yan","family":"Tang","sequence":"additional","affiliation":[{"name":"Department of Anaesthesiology and Intensive Care, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 311121, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bing-Duo","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Anaesthesiology and Intensive Care, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 311121, 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