Relationship between fetal and neonatal bicromial diameter measurements and shoulder dystocia, a systematic review

Authors : Elif Terzi, Aytaç Kenar
Pages : 41-50
Doi:10.34084/bshr.1695069
View : 78 | Download : 149
Publication Date : 2025-08-31
Article Type : Review Paper
Abstract :This article aims to systematically review prior studies on the relationship between fetal and neonatal biacromial diameter measurements and shoulder dystocia and to guide further studies on this subject. The literature was reviewed by searching the keywords \\\'fetal biacromial\\\', \\\'fetal bisacromial\\\', \\\'fetal bis-acromial\\\', \\\'neonatal biacromial\\\', \\\'neonatal bisacromial\\\', \\\'neonatal bis-acromial\\\', \\\'shoulder dystocia\\\' on the Pubmed, Embase, Cochrane Library search engines with the \\\'All Fields\\\' option enabled and year ranges left blank. Randomized controlled trials, case-control studies and cohort studies written in English were included. 30 articles were found. Eight of these met the inclusion criteria. The articles were examined by both Dr. XX and Dr. XX separately. Discrepancies regarding the articles were solved by the arbitration of Dr. XX. Eight articles including a total of 3669 patients were included in the review. It was observed that the articles used no common standardized measurement technique or measurement material to assess fetal and neonatal biacromial distance. The review revealed that the cutoff value for fetal biacromial diameter was between 13.8-15.4 mm and that this measurement reliably predicted shoulder dystocia. When the cutoff value for neonatal biacromial diameter was 14 mm, a strong positive correlation between this measurement and shoulder dystocia was found. Both fetal and neonatal biacromial diameters are positively correlated with shoulder dystocia. Establishing standardized and easy-to-use measurement methods can make biacromial diameter measurements more useful for obstetricians in predicting shoulder dystocia.
Keywords : Omuz distosisi, Antropometri, Prenatal ultrasonografi, Yenidoğan

ORIGINAL ARTICLE URL