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This study assessed the effect of subclavian vein (SCV) diameter combined with perioperative fluid therapy on preventing post-induction hypotension (PIH) in patients with lower ASA status.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      This two-part study included patients aged 18 to 65 years, classified as ASA physical status I or II, and scheduled for elective surgery. The first part (Part I) included 146 adult patients, where maximum SCV diameter (dSCV\n                      <jats:sub>max<\/jats:sub>\n                      ), minimum SCV diameter (dSCV\n                      <jats:sub>min<\/jats:sub>\n                      ), SCV collapsibility index (SCV\n                      <jats:sub>CI<\/jats:sub>\n                      ) and SCV variability (SCV\n                      <jats:sub>variability<\/jats:sub>\n                      ) assessed using ultrasound. PIH was determined by reduction in mean arterial pressure (MAP) exceeding 30% from baseline measurement or any instance of MAP\u2009&lt;\u2009falling below 65 mmHg for \u2265\u2009a duration of at least 1\u00a0min during the period from induction to 10\u00a0min after intubation. Receiver Operating Characteristic (ROC) curve analysis was employed to determine the predictive values of subclavian vein diameter and other relevant parameters. The second part comprised 124 adult patients, where patients with SCV diameter above the optimal cutoff value, as determined in Part I study, received 6\u00a0ml\/kg of colloid solution within 20\u00a0min before induction. The study evaluated the impact of subclavian vein diameter combined with perioperative fluid therapy by comparing the observed incidence of PIH after induction of anesthesia.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The areas under the curves (with 95% confidence intervals) for SCV\n                      <jats:sub>CI<\/jats:sub>\n                      and SCV\n                      <jats:sub>variability<\/jats:sub>\n                      were both 0.819 (0.744\u20130.893). The optimal cutoff values were determined to be 45.4% and 14.7% (with sensitivity of 76.1% and specificity of 86.7%), respectively. Logistic regression analysis, after adjusting for confounding factors, demonstrated that both SCV\n                      <jats:sub>CI<\/jats:sub>\n                      and SCV\n                      <jats:sub>variability<\/jats:sub>\n                      were significant predictors of PIH. A threshold of 45.4% for SCV\n                      <jats:sub>CI<\/jats:sub>\n                      was chosen as the grouping criterion. The incidence of PIH in patients receiving fluid therapy was significantly lower in the SCV\n                      <jats:sub>CI<\/jats:sub>\n                      \u2265 45.4% group compared to the SCV\n                      <jats:sub>CI<\/jats:sub>\n                      &lt; 45.4% group.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>\n                      Both SCV\n                      <jats:sub>CI<\/jats:sub>\n                      and SCV\n                      <jats:sub>variability<\/jats:sub>\n                      are noninvasive parameters capable of predicting PIH, and their combination with perioperative fluid therapy can reduce the incidence of PIH.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s12871-024-02514-9","type":"journal-article","created":{"date-parts":[[2024,4,10]],"date-time":"2024-04-10T02:01:58Z","timestamp":1712714518000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Effect of subclavian vein diameter combined with perioperative fluid therapy on preventing post-induction hypotension in patients with ASA status I or II"],"prefix":"10.1186","volume":"24","author":[{"given":"Bin","family":"Wang","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kangli","family":"Hui","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jingwei","family":"Xiong","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chongya","family":"Yang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xinyu","family":"Cao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guangli","family":"Zhu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yang","family":"Ang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Manlin","family":"Duan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,4,10]]},"reference":[{"issue":"1","key":"2514_CR1","doi-asserted-by":"publisher","first-page":"57","DOI":"10.1093\/bja\/aex127","volume":"119","author":"S S\u00fcdfeld","year":"2017","unstructured":"S\u00fcdfeld S, Brechnitz S, Wagner JY, et al. 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