{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,24]],"date-time":"2026-02-24T15:38:31Z","timestamp":1771947511660,"version":"3.50.1"},"reference-count":11,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2020,7,19]],"date-time":"2020-07-19T00:00:00Z","timestamp":1595116800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Pediatrics International"],"published-print":{"date-parts":[[2020,8]]},"abstract":"Abstract<\/jats:title>Background<\/jats:title>Appropriate management of the endotracheal tube (ETT) insertion depth is important. The depth calculated using Tochen\u2019s formula is overestimated in extremely\u2010low\u2010 birthweight infants, particularly those with a birthweight <750\u00a0g. Gestational age has been shown to be particularly useful in the Neonatal Resuscitation Program, 7th edition.5<\/jats:sup> However, a randomized trial for estimating the ETT insertion depth failed to show the advantage of using gestational age over birthweight.6<\/jats:sup> Therefore, we aimed to estimate the appropriate ETT insertion depth in neonates weighing <750\u00a0g.<\/jats:p><\/jats:sec>Methods<\/jats:title>This was a single\u2010center, retrospective observational study including neonates weighing <750\u00a0g who required intubation. The appropriate depth was determined by adjusting the distance between the actual ETT position and the area from the first to the second thoracic vertebra on the radiograph. Correlations between gestational age and physique were investigated using Pearson\u2019s correlation coefficient. We examined small\u2010for\u2010 gestational\u2010age (SGA) infants and non\u2010SGA infants separately.<\/jats:p><\/jats:sec>Results<\/jats:title>Forty neonates were enrolled in this study. The mean gestational age and birthweight were 26.3\u00a0weeks and 620\u00a0g respectively. Twenty infants were SGA. The ETT position was deep in 35 of 40 cases, with the strongest correlation between weight and ETT insertion depth. The correlation with gestational age was not observed in this study.<\/jats:p><\/jats:sec>Conclusions<\/jats:title>Our study showed that the ideal ETT insertion depth at birth correlates with birthweight in neonates weighing <750\u00a0g. Therefore, determination by gestational age may not be feasible in populations with a high proportion of SGA infants.<\/jats:p><\/jats:sec>","DOI":"10.1111\/ped.14245","type":"journal-article","created":{"date-parts":[[2020,4,2]],"date-time":"2020-04-02T12:54:08Z","timestamp":1585832048000},"page":"932-936","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Ideal endotracheal tube insertion depth in neonates with a birthweight less than 750\u00a0g"],"prefix":"10.1111","volume":"62","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4341-6973","authenticated-orcid":false,"given":"Syusuke","family":"Takeuchi","sequence":"first","affiliation":[{"name":"Department of Neonatology Ibaraki Children\u2019s Hospital Mito Japan"},{"name":"Department of Pediatrics University of Tsukuba Hospital Tsukuba Ibaraki Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Junichi","family":"Arai","sequence":"additional","affiliation":[{"name":"Department of Neonatology Ibaraki Children\u2019s Hospital Mito Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Motomichi","family":"Nagafuji","sequence":"additional","affiliation":[{"name":"Department of Pediatrics University of Tsukuba Hospital Tsukuba Ibaraki Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ayako","family":"Hinata","sequence":"additional","affiliation":[{"name":"Department of Neonatology Ibaraki Children\u2019s Hospital Mito Japan"},{"name":"Department of Neonatal Health and Development Aomori Prefectural Central Hospital Aomori Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5100-2941","authenticated-orcid":false,"given":"Tae","family":"Kamakura","sequence":"additional","affiliation":[{"name":"Department of Neonatology Ibaraki Children\u2019s Hospital Mito Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7212-9036","authenticated-orcid":false,"given":"Yusuke","family":"Hoshino","sequence":"additional","affiliation":[{"name":"Department of Neonatology Ibaraki Children\u2019s Hospital Mito Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yoshiya","family":"Yukitake","sequence":"additional","affiliation":[{"name":"Department of Neonatology Ibaraki Children\u2019s Hospital Mito Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2020,7,19]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-3476(79)80309-1"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpeds.2008.11.057"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1038\/sj.jp.7211503"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.resuscitation.2008.02.002"},{"key":"e_1_2_8_6_1","doi-asserted-by":"crossref","first-page":"134","DOI":"10.1542\/9781610020275","volume-title":"Textbook of Neonatal Resuscitation","author":"Weiner GM","year":"2016"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1159\/000369375"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1136\/fn.71.1.F32"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1111\/ped.12331"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1038\/bmt.2012.244"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1542\/peds.54.4.506"},{"key":"e_1_2_8_12_1","first-page":"1245","article-title":"A study estimating the optimal depth of orotracheal intubation in neonates","volume":"103","author":"Nakamura K","year":"1999","journal-title":"J. Japan Pediatr. 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