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This study compared the effects of vasopressor infusion and fluid supplementation on intestinal microcirculation during treating intraoperative hypotension. Thirty-two rats were randomly divided into the following four groups: Light Anesthesia group (LA, 0.8\u20131% isoflurane); Deep Anesthesia group (DA, 1.5\u20131.8% isoflurane); Fluid DA group (1.5\u20131.8% isoflurane and fluid supplementation); and Norepinephrine DA group (1.5\u20131.8% isoflurane and norepinephrine infusion). At 240\u00a0min, perfused small vessel density (PSVD) of the mucosa did not differ significantly between the Fluid DA and Norepinephrine DA groups [26.2 (3.2) vs 28.9 (2.5) mm\/mm<jats:sup>2<\/jats:sup>, <jats:italic>P<\/jats:italic>\u2009=\u20090.077], and tissue oxygen saturation of the mucosa was lower in the Fluid DA groups than in the Norepinephrine DA groups [ 48 (7) vs 57 (6) %, <jats:italic>P<\/jats:italic>\u2009=\u20090.02]. At 240\u00a0min, TSVD and PSVD of the seromuscular layer were higher in the Norepinephrine DA group than in the Fluid DA group. Fluid administration was higher in the Fluid DA group than in the Norepinephrine DA group [66 (25) vs. 9 (5) \u03bcL\/g, <jats:italic>P<\/jats:italic>\u2009=\u20090.001]. Our results showed that norepinephrine can resuscitate intraoperative hypotension related microcirculatory alteration and avoid fluid overload.<\/jats:p>","DOI":"10.1038\/s41598-020-76983-6","type":"journal-article","created":{"date-parts":[[2020,11,16]],"date-time":"2020-11-16T11:04:49Z","timestamp":1605524689000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Comparing effects of intraoperative fluid and vasopressor infusion on intestinal microcirculation"],"prefix":"10.1038","volume":"10","author":[{"given":"Chia-Ning","family":"Fan","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Szu-Jen","family":"Yang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Po-Yuan","family":"Shih","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ming-Jiuh","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shou-Zen","family":"Fan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jui-Chang","family":"Tsai","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei-Zen","family":"Sun","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chih\u2011Min","family":"Liu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yu-Chang","family":"Yeh","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2020,11,16]]},"reference":[{"key":"76983_CR1","doi-asserted-by":"publisher","first-page":"170","DOI":"10.1016\/j.bja.2019.03.027","volume":"123","author":"T Parker","year":"2019","unstructured":"Parker, T., Brealey, D., Dyson, A. & Singer, M. 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