{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,27]],"date-time":"2026-07-27T14:18:20Z","timestamp":1785161900183,"version":"3.55.0"},"reference-count":16,"publisher":"Georg Thieme Verlag KG","issue":"07","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Am J Perinatol"],"published-print":{"date-parts":[[2021,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Objective\u2003Endotracheal intubation is a frequent procedure performed in neonates with respiratory distress. Clinicians use different methods to estimate the intubation insertion depth, but, unfortunately, the improper insertion results are very high. In this study, we aimed to compare the two different methods (Tochen's formula\u2009=\u2009weight in kilograms\u2009+\u20096\u2009cm; and nasal septum\u2013tragus length [NTL]\u2009+\u20091\u2009cm) used to determine the endotracheal tube (ETT) insertion depth.<\/jats:p><jats:p>Study Design\u2003Infants who had intubation indications were enrolled in this study. The intubation tube was fixed using the Tochen formula (Tochen group) or the NTL\u2009+\u20091\u2009cm formula (NTL group). After intubation, the chest radiograph was evaluated (above T1, proper place, and below T2).<\/jats:p><jats:p>Results\u2003A total of 167 infants (22\u201342 weeks of gestational age) were included in the study. The proper tube placement rate in both groups was similar (32.4 vs. 30.4% for infants\u2009&lt;\u200934 weeks of gestational age and 56.8 vs. 45.0% in infants\u2009&gt;\u200934 weeks of gestational age). The ETT was frequently placed below T2 at a higher rate in infants with a gestational age of &lt;34 weeks, especially in the NTL group (46% in the Tochen group and 60.7% in the NTL group).<\/jats:p><jats:p>Conclusion\u2003The NTL\u2009+\u20091\u2009cm formula led to a higher rate of ETT placement below T2, especially in infants with a birth weight of &lt;1,500\u2009g. Therefore, more studies are needed to determine the optimal ETT insertion depth.<\/jats:p>","DOI":"10.1055\/s-0039-3400982","type":"journal-article","created":{"date-parts":[[2019,12,20]],"date-time":"2019-12-20T08:40:07Z","timestamp":1576831207000},"page":"728-733","source":"Crossref","is-referenced-by-count":16,"title":["Is Nasal Septum\u2013Tragus Length Measurement Appropriate for Endotracheal Tube Intubation Depth in Neonates? A Randomized Controlled Study"],"prefix":"10.1055","volume":"38","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7580-915X","authenticated-orcid":false,"given":"\u00d6zg\u00fcn","family":"Uygur","sequence":"additional","affiliation":[{"name":"Division of Neonatology, Department of Pediatrics, \u0130zmir Tepecik Training and Research Hospital, \u0130zmir, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0760-0773","authenticated-orcid":false,"given":"Mehmet Yekta","family":"\u00d6ncel","sequence":"additional","affiliation":[{"name":"Division of Neonatology, Department of Pediatrics, Faculty of Medicine, Izmir Katip \u00c7elebi University, Izmir, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"G\u00fcls\u00fcm Kad\u0131o\u011flu","family":"\u015eim\u015fek","sequence":"additional","affiliation":[{"name":"Clinic of Neonatology, Zekai Tahir Burak Women's Health and Research Hospital, Ankara, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nil\u00fcfer","family":"Okur","sequence":"additional","affiliation":[{"name":"Clinic of Neonatology, Diyarbak\u0131r Gazi Ya\u015fargil Training and Research Hospital, Diyarbak\u0131r, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K\u0131ymet","family":"\u00c7elik","sequence":"additional","affiliation":[{"name":"Clinic of Neonatology, Diyarbak\u0131r Gazi Ya\u015fargil Training and Research Hospital, Diyarbak\u0131r, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1282-9030","authenticated-orcid":false,"given":"\u00d6zlem","family":"Bozkurt","sequence":"additional","affiliation":[{"name":"Clinic of Neonatology, \u015eanl\u0131urfa Training and Research Hospital, \u015eanl\u0131urfa, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ebru","family":"Y\u00fccesoy","sequence":"additional","affiliation":[{"name":"Clinic of Neonatology, \u015eanl\u0131urfa Training and Research Hospital, \u015eanl\u0131urfa, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Demet","family":"Terek","sequence":"additional","affiliation":[{"name":"Division of Neonatology, Department of Pediatrics, Faculty of Medicine, Ege University, Izmir, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Meltem Koyuncu","family":"Arslan","sequence":"additional","affiliation":[{"name":"Division of Neonatology, Department of Pediatrics, \u0130zmir Tepecik Training and Research Hospital, \u0130zmir, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yeliz","family":"Pek\u00e7evik","sequence":"additional","affiliation":[{"name":"Department of Radiology, Izmir Tepecik Training and Research Hospital, Izmir, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Melek","family":"Akar","sequence":"additional","affiliation":[{"name":"Division of Neonatology, Department of Pediatrics, \u0130zmir Tepecik Training and Research Hospital, \u0130zmir, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"\u00d6zge Altun","family":"K\u00f6ro\u011flu","sequence":"additional","affiliation":[{"name":"Division of Neonatology, Department of Pediatrics, Faculty of Medicine, Ege University, Izmir, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Suna","family":"O\u011fuz","sequence":"additional","affiliation":[{"name":"Clinic of Neonatology, Zekai Tahir Burak Women's Health and Research Hospital, Ankara, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nilg\u00fcn","family":"K\u00fclt\u00fcrsay","sequence":"additional","affiliation":[{"name":"Division of Neonatology, Department of Pediatrics, Faculty of Medicine, Ege 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