{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,29]],"date-time":"2026-10-29T08:10:46Z","timestamp":1793261446361,"version":"4.5.0"},"reference-count":45,"publisher":"American Medical Association (AMA)","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JAMA Netw Open"],"abstract":"Importance<\/jats:title>The efficacy of a semirecumbent position (SRP) in reducing postoperative hypoxemia during anesthesia emergence is unclear despite its widespread use.<\/jats:p><\/jats:sec>Objective<\/jats:title>To determine the differences in postoperative hypoxemia between patients in an SRP and a supine position.<\/jats:p><\/jats:sec>Design, Setting, and Participants<\/jats:title>This randomized clinical trial was performed at a tertiary hospital in China between March 20, 2021, and May 10, 2022. Patients scheduled to undergo laparoscopic upper abdominal surgery under general anesthesia were enrolled. Study recruitment and follow-up are complete.<\/jats:p><\/jats:sec>Interventions<\/jats:title>Patients were randomized to 1 of the following positions at the end of the operation until leaving the postanesthesia care unit: supine (group S), 15\u00b0 SRP (group F), or 30\u00b0 SRP (group T).<\/jats:p><\/jats:sec>Main Outcomes and Measures<\/jats:title>The primary outcome was the incidence of postoperative hypoxemia in the postanesthesia care unit. Severe hypoxemia was also evaluated.<\/jats:p><\/jats:sec>Results<\/jats:title>Out of 700 patients (364 men [52.0%]; mean [SD] age, 47.8 [11.3] years), 233 were randomized to group S (126 men [54.1%]; mean [SD] age, 48.2 [10.9] years), 233 to group F (122 men [52.4%]; mean [SD] age, 48.1 [10.9] years), and 234 to group T (118 women [50.4%]; mean [SD] age, 47.2 [12.1] years). Postoperative hypoxemia differed significantly among the 3 groups (group S, 109 of 233 [46.8%]; group F, 105 of 233 [45.1%]; group T, 76 of 234 [32.5%]; P<\/jats:italic>\u2009=\u2009.002). This difference was statistically significant for groups T vs S (risk ratio [RR], 0.69 [95% CI, 0.55-0.87]; P<\/jats:italic>\u2009=\u2009.002) and groups T vs F (RR, 0.72 [95% CI, 0.57-0.91]; P<\/jats:italic>\u2009=\u2009.007), but not for groups F vs S (RR, 0.96 [95% CI, 0.79-1.17]; P<\/jats:italic>\u2009=\u2009.78). Severe hypoxemia also differed among the 3 groups (group S, 61 of 233 [26.2%]; group F, 53 of 233 [22.7%]; group T, 36 of 234 [15.4%]; P<\/jats:italic>\u2009=\u2009.01). This difference was statistically significant for groups T vs S (RR, 0.59 [95% CI, 0.41-0.85]; P<\/jats:italic>\u2009=\u2009.005).<\/jats:p><\/jats:sec>Conclusions and Relevance<\/jats:title>In this randomized clinical trial of SRP during anesthesia recovery in patients undergoing laparoscopic upper abdominal surgery, postoperative hypoxemia was significantly reduced in group T compared with group F or group S.<\/jats:p><\/jats:sec>Trial Registration<\/jats:title>Chinese Clinical Trial Registry Identifier: ChiCTR2100045087<\/jats:ext-link><\/jats:p><\/jats:sec>","DOI":"10.1001\/jamanetworkopen.2024.16797","type":"journal-article","created":{"date-parts":[[2024,6,28]],"date-time":"2024-06-28T18:21:48Z","timestamp":1719598908000},"page":"e2416797","source":"Crossref","is-referenced-by-count":24,"title":["Semirecumbent Positioning During Anesthesia Recovery and Postoperative 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