Evidence map›Paper›PMID 41912706›Full record

ArticleJournal of perinatology : official journal of the California Perinatal Association2026

Optimal endotracheal tube insertion depth in infants with birth weights under 500 grams.

Kyusang Yoo, Soo Hyun Kim, Jung Il Kwak, Tae-Gyeong Kim, Abraham Kwak, Juhee Park, Joo Hyung Roh, Jeong Min Lee, Ha Na Lee, Jiyoon Jeong and 3 more

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Article in Journal of perinatology : official journal of the California Perinatal Association, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

What it found

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

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5 · Who and what money

Authors and funding

13 authors.

Kyusang YooDepartment of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Republic of Korea.ORCID http://orcid.org/0009-0005-6952-961X
Soo Hyun KimDepartment of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Republic of Korea. soohyun@amc.seoul.kr.ORCID http://orcid.org/0000-0001-5920-7354
Jung Il KwakDepartment of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Republic of Korea.
Tae-Gyeong KimDepartment of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Republic of Korea.
Abraham KwakDepartment of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Republic of Korea.ORCID http://orcid.org/0000-0002-8161-333X
Juhee ParkDepartment of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Republic of Korea.
Joo Hyung RohDepartment of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Republic of Korea.ORCID http://orcid.org/0009-0006-7965-4980
Jeong Min LeeDepartment of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Republic of Korea.
Ha Na LeeDepartment of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Republic of Korea.ORCID http://orcid.org/0000-0002-0217-1773
Jiyoon JeongDepartment of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Republic of Korea.
Chae Young KimDepartment of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Republic of Korea.
Euiseok JungDepartment of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Republic of Korea.ORCID http://orcid.org/0000-0003-0693-5627
Byong Sop LeeDepartment of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Republic of Korea.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveDevelop a birth anthropometry-based model to estimate initial endotracheal tube (ETT) insertion depth for infants with birth weight <500 g. STUDY

designRetrospective single center cohort (2010-2025) including infants with birth weight <500 g, intubated on day 0 and underwent a postintubation chest radiograph. Adequate depth was defined as lip-to-tip placement between the upper border of T1 and the lower border of T2. Linear and quadratic models using birth weight and length were compared; the final model was presented as a bedside nomogram.

resultEighty-two infants met the inclusion criteria. Birth weight and length independently predicted radiograph-derived optimal depth (p < 0.001). A combined quadratic model showed the strongest fit (adjusted R² = 0.70), outperforming single parameter rules.

conclusionIn neonates <500 g, a quadratic weight-length model improves the prediction of radiograph-defined midtracheal ETT depth and offers a practical bedside guide for initial placement.

Identifiers

PMID41912706

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.