Survival and unique clinical practices of extremely preterm infants born at 22–23 weeks’ gestation in Japan: a national survey (2024)

1. http://orcid.org/0000-0002-3669-883XTetsuya Isayama1,
2. Kei Miyakoshi2,
3. Fumihiko Namba3,
4. Mariko Hida4,
5. http://orcid.org/0000-0002-5685-2670Ichiro Morioka5,
6. Keisuke Ishii6,
7. Susumu Miyash*ta7,
8. Shuichiro Uehara8,
9. Yoshiaki Kinosh*ta9,
10. Sachie Suga10,
11. Katsutoshi Nakahata11,
12. Atsushi Uchiyama12,
13. Katsufumi Otsuki13

1. ¹Division of Neonatology, National Center for Child Health and Development (NCCHD), Tokyo, Japan
2. ²Obstetrics and Gynecology, International Catholic Hospital, Tokyo, Japan
3. ³Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
4. ⁴Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
5. ⁵Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo, Japan
6. ⁶Department of Maternal Fetal Medicine, Osaka Women's and Children’s Hospital, Izumi, Japan
7. ⁷Department of Maternal Fetal Medicine, Miyagi Children’s Hospital, Sendai, Miyagi, Japan
8. ⁸Department of Pediatric Surgery, Nihon University School of Medicine, Itabashi-ku, Tokyo, Japan
9. ⁹Department of Pediatric Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
10. ¹⁰Department of Obstetrics and Gynecology, National Hospital Organization Nagasaki Medical Center, Nagasaki, Japan
11. ¹¹Department of Anesthesiology, Kansai Medical University, Hirakata, Osaka, Japan
12. ¹²Department of Pediatrics, Tokai University School of Medicine, Isehara, Kanagawa, Japan
13. ¹³Department of Obstetrics and Gynecology, Showa University Koto Toyosu Hospital, Koto-ku, Tokyo, Japan

1. Correspondence to Dr Tetsuya Isayama, Division of Neonatology, National Center for Child Health and Development (NCCHD), Tokyo, Japan; isayama-t{at}ncchd.go.jp

• Mortality
• Resuscitation
• Intensive Care Units, Neonatal
• Neonatology

• Mortality
• Resuscitation
• Intensive Care Units, Neonatal
• Neonatology

Footnotes

• Contributors TI conceptualised and designed the study, designed the data collection instruments, collected data, performed the analyses, drafted the initial manuscript, and critically reviewed and revised the manuscript. KM conceptualised and designed the study, designed the data collection instruments, collected the data, and critically reviewed and revised the manuscript. FN, MH, IM, KI, SM, SU, YK, SS, KN, AU and KO conceptualised and designed the study, reviewed the data collection instruments, and critically reviewed and revised the manuscript. TI is guarantor.

• Funding This study was supported by the Japan Society for Perinatal and Neonatal Medicine (JSPNM). The English editing service was supported by JSPS KAKENHI (grant no: JP22K07929).

• Competing interests None declared.

• Provenance and peer review Not commissioned; externally peer reviewed.

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