{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T19:06:56Z","timestamp":1777921616692,"version":"3.51.4"},"reference-count":35,"publisher":"SAGE Publications","issue":"2","license":[{"start":{"date-parts":[[2023,2,1]],"date-time":"2023-02-01T00:00:00Z","timestamp":1675209600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Journal of Laparoendoscopic &amp; Advanced Surgical Techniques"],"published-print":{"date-parts":[[2023,2,1]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>\n                      The aim of this study is to assess the extent of the increased intracranial pressure resulting from lateral decubitus and 45\u00b0 downward positioning using sonographic optic nerve sheath diameter (ONSD) in patients undergoing laparoscopic transperitoneal nephrectomy. In addition, we evaluated the effect of the carbon dioxide pneumoperitoneum (CO\n                      <jats:sub>2<\/jats:sub>\n                      PP) on ONSD.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and Methods:<\/jats:title>\n                    <jats:p>\n                      Twenty-four adults were enrolled in this prospective observational study. Longitudinal and transverse ONSDs were measured for each eye by ocular ultrasonography. The values were noted in supine position (T0), 20 minutes after induction of anesthesia (T1), after insufflation of the abdomen in lateral 45\u00b0 head-down position (T2), at 30-minute intervals during surgery (T3-T4-T5), during lateral 45\u00b0 head-down position after CO\n                      <jats:sub>2<\/jats:sub>\n                      exsufflation (T6), before awakening while supine (T7), and at postoperative 24th hour (T8). Hemodynamic and respiratory parameters were investigated at the measurement time points.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      Average ONSD values for the lower eye was T0\u2009=\u20094.27\u2009\u00b1\u20090.4\u2009mm, T1\u2009=\u20094.56\u2009\u00b1\u20090.6\u2009mm, T2\u2009=\u20094.84\u2009\u00b1\u20090.6\u2009mm, T3\u2009=\u20094.91\u2009\u00b1\u20090.4\u2009mm, T4\u2009=\u20094.99\u2009\u00b1\u20090.5\u2009mm, T5\u2009=\u20094.97\u2009\u00b1\u20090.5\u2009mm T6\u2009=\u20094.96\u2009\u00b1\u20090.5\u2009mm, T7\u2009=\u20094.76\u2009\u00b1\u20090.4\u2009mm, T8\u2009=\u20094.36\u2009\u00b1\u20090.5\u2009mm and for the upper eye was T0\u2009=\u20094.24\u2009\u00b1\u20090.4\u2009mm, T1\u2009=\u20094.39\u2009\u00b1\u20090.5\u2009mm, T2\u2009=\u20094.54\u2009\u00b1\u20090.5\u2009mm, T3\u2009=\u20094.60\u2009\u00b1\u20090.4\u2009mm, T4\u2009=\u20094.66\u2009\u00b1\u20090.4\u2009mm, T5\u2009=\u20094.72\u2009\u00b1\u20090.7\u2009mm, T6\u2009=\u20094.68\u2009\u00b1\u20090.4\u2009mm, T7\u2009=\u20094.52\u2009\u00b1\u20090.4\u2009mm, T8\u2009=\u20094.30\u2009\u00b1\u20090.4\u2009mm (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009&lt;\u2009.001).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>\n                      In our study, we observed a significant increase in ONSD within minutes after the patient was placed in a head-down position. We also observed that the difference increased more with CO\n                      <jats:sub>2<\/jats:sub>\n                      PP and was proportional to the length of the surgery. We found that it regressed to initial levels at the postoperative 24th hour.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Clinicaltrials.gov:<\/jats:title>\n                    <jats:p>NCT05185908.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1089\/lap.2022.0344","type":"journal-article","created":{"date-parts":[[2022,8,29]],"date-time":"2022-08-29T11:04:11Z","timestamp":1661771051000},"page":"171-176","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":3,"title":["The Effects of Lateral 45\u00b0 Head-Down Position and Carbon Dioxide Pneumoperitoneum on the Optic Nerve Sheath Diameter in Patients Undergoing Laparoscopic Transperitoneal Nephrectomies: A Prospective Observational Study"],"prefix":"10.1177","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5743-9060","authenticated-orcid":false,"given":"Ay\u015fe G\u00fcl\u015fah","family":"Atasever","sequence":"first","affiliation":[{"name":"Department of Anesthesiology and Intensive Care, Gaziosmanpasa Research and Training Hospital, Istanbul, Turkey."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emine Aysu","family":"Salviz","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hayriye","family":"\u015eent\u00fcrk \u00c7ift\u00e7i","sequence":"additional","affiliation":[{"name":"Department of Medical Biology, Istanbul University Istanbul Faculty of Medicine, Istanbul, Turkey."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emre Serta\u00e7","family":"Bing\u00fcl","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology and Reanimation, Istanbul University Istanbul Faculty of Medicine, Istanbul, Turkey."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"N\u00fckhet","family":"Sivrikoz","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology and Reanimation, Istanbul University Istanbul Faculty of Medicine, Istanbul, Turkey."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3514-1394","authenticated-orcid":false,"given":"Selcuk","family":"Erdem","sequence":"additional","affiliation":[{"name":"Division of Urologic Oncology, Department of Urology, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5663-1026","authenticated-orcid":false,"given":"Meltem","family":"Savran Karadeniz","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology and Reanimation, Istanbul University Istanbul Faculty of Medicine, Istanbul, Turkey."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2023,2,8]]},"reference":[{"key":"e_1_3_5_2_2","doi-asserted-by":"publisher","DOI":"10.1097\/01.ju.0000145886.26719.73"},{"key":"e_1_3_5_3_2","doi-asserted-by":"publisher","DOI":"10.3349\/ymj.2012.53.3.459"},{"key":"e_1_3_5_4_2","doi-asserted-by":"publisher","DOI":"10.23736\/S0375-9393.19.13852-7"},{"key":"e_1_3_5_5_2","doi-asserted-by":"publisher","DOI":"10.1385\/NCC:4:1:008"},{"key":"e_1_3_5_6_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1399-6576.2011.02432.x"},{"key":"e_1_3_5_7_2","doi-asserted-by":"publisher","DOI":"10.1093\/bja\/aew356"},{"key":"e_1_3_5_8_2","doi-asserted-by":"publisher","DOI":"10.5152\/TJAR.2019.82258"},{"key":"e_1_3_5_9_2","doi-asserted-by":"publisher","DOI":"10.1089\/end.2014.0019"},{"key":"e_1_3_5_10_2","doi-asserted-by":"publisher","DOI":"10.1089\/neu.2012.2829"},{"key":"e_1_3_5_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jns.2015.12.032"},{"key":"e_1_3_5_12_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00134-007-0797-6"},{"key":"e_1_3_5_13_2","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0183170"},{"key":"e_1_3_5_14_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1553-2712.2007.00031.x"},{"key":"e_1_3_5_15_2","doi-asserted-by":"publisher","DOI":"10.1007\/s12028-011-9606-8"},{"key":"e_1_3_5_16_2","doi-asserted-by":"publisher","DOI":"10.3109\/08820538.2015.1009557"},{"key":"e_1_3_5_17_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00134-018-5305-7"},{"key":"e_1_3_5_18_2","doi-asserted-by":"publisher","DOI":"10.1136\/bmjopen-2017-016402"},{"key":"e_1_3_5_19_2","doi-asserted-by":"publisher","DOI":"10.1007\/s40520-021-02057-w"},{"key":"e_1_3_5_20_2","doi-asserted-by":"publisher","DOI":"10.1136\/emj.2006.040931"},{"issue":"4","key":"e_1_3_5_21_2","first-page":"285","article-title":"The physiology and complications of the Trendelenburg position","volume":"74","author":"Hewer CL.","year":"1956","unstructured":"Hewer CL. 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