{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,13]],"date-time":"2026-07-13T11:46:42Z","timestamp":1783943202164,"version":"3.55.0"},"reference-count":26,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2024,3,5]],"date-time":"2024-03-05T00:00:00Z","timestamp":1709596800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2024,3,5]],"date-time":"2024-03-05T00:00:00Z","timestamp":1709596800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"name":"Project of discipline construction of \"Summit Plan\"","award":["4237"],"award-info":[{"award-number":["4237"]}]}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Perioper Med"],"abstract":"<jats:title>Abstract<\/jats:title><jats:sec>\n                <jats:title>Background<\/jats:title>\n                <jats:p>Intravenous lidocaine could be a potential alternative adjuvant to propofol-based sedation for gastroscopy in elderly patients. This study aimed to evaluate the effect of intravenous lidocaine on the median effective dose (ED50) of propofol induction dose in elderly patients undergoing painless gastroscopy.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>The study included 70 patients aged\u2009\u2265\u200960\u00a0years undergoing painless gastroscopy with 64 randomly assigned to either group L (2% lidocaine 1.5\u00a0mg\/kg, <jats:italic>n<\/jats:italic>\u2009=\u200931) or group N (equal volume normal saline, <jats:italic>n<\/jats:italic>\u2009=\u200933). All patients received propofol induction following 0.1\u00a0\u03bcg\/kg intravenous sufentanil. The Dixon \u201cup-and-down\u201d sequential method was used, with a 1.5\u00a0mg\/kg initial induction dose of propofol followed by a 0.1\u00a0mg\/kg sequential variable dose. The primary endpoint was the ED50 of the propofol induction dose. The total propofol dose, recovery time, adverse events, and local anesthetic intoxication reactions were also recorded.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>The ED50 of propofol induction dose was 0.670 (95% confidence interval [CI] 0.216\u20130.827) mg\/kg in group L and 1.118 (95% CI 0.803\u20131.232) mg\/kg in group N. There was a statistically significant difference between the two groups (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001). The incidence of hypotension and propofol injection pain were lower in group L than in group N (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05). Furthermore, the orientation recovery time in group L was shorter compared to group N (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05). None of the participants in group L observed local anesthetic intoxication reactions after receiving lidocaine.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>The administration of intravenous lidocaine to elderly patients undergoing painless gastroscopy resulted in a significant 40% reduction in the ED50 of propofol induction dose, which may be related to the decreased incidence of hypotension and injection pain, as well as the improved post-gastroscopy orientation recovery.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Trial registration<\/jats:title>\n                <jats:p>ChiCTR, ChiCTR2200065530. Registered on 08 November 2022.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s13741-024-00370-2","type":"journal-article","created":{"date-parts":[[2024,3,5]],"date-time":"2024-03-05T15:02:33Z","timestamp":1709650953000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Effect of intravenous lidocaine on the ED50 of propofol induction dose in elderly patients undergoing painless gastroscopy: a prospective, randomized, double-blinded, controlled study"],"prefix":"10.1186","volume":"13","author":[{"given":"Lili","family":"Tang","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenhui","family":"Lv","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jingjing","family":"Sun","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lijian","family":"Chen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,3,5]]},"reference":[{"issue":"6","key":"370_CR1","doi-asserted-by":"publisher","first-page":"1093","DOI":"10.1097\/00005344-198311000-00027","volume":"5","author":"DR Abernethy","year":"1983","unstructured":"Abernethy DR, Greenblatt DJ. 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The study did not contain any individual person\u2019s data in any form (including individual details, images, or videos).","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors declare no competing interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"15"}}