Sonographic Assessment of Fetal Biometric Parameters and Maternal Height Ratio for Prediction of Cesarean Delivery due to Labor Dystocia:

Wiarm Wadeng; Wanlaya Onwatanasarikul; Nop Khongthon; Monyada Pleankong; Sinart Prommas; Kornkarn  Bhamarapravatana; Komsun Suwannarurk

doi:10.33192/smj.v77i6.273115

Authors

Wiarm Wadeng Department of Obstetrics and Gynecology, Bhumibol Adulyadej Hospital, Royal Thai Air Force, Thailand
Wanlaya Onwatanasarikul Department of Obstetrics and Gynecology, Bhumibol Adulyadej Hospital, Royal Thai Air Force, Thailand
Nop Khongthon Department of Clinical Epidemiology, Faculty of Medicine, Thammasat University, Thailand
Monyada Pleankong Department of Obstetrics and Gynecology, Bhumibol Adulyadej Hospital, Royal Thai Air Force, Thailand
Sinart Prommas Department of Obstetrics and Gynecology, Bhumibol Adulyadej Hospital, Royal Thai Air Force, Thailand
Kornkarn Bhamarapravatana Department of Preclinical Science, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
Komsun Suwannarurk Department of Obstetrics and Gynecology, Faculty of Medicine, Thammasat University, Pathumthani, Thailand

DOI:

https://doi.org/10.33192/smj.v77i6.273115

Keywords:

Labor dystocia, fetal biometric parameters, maternal height, cesarean delivery

Abstract

Objective: To investigate the correlation of fetal biometric parameters (FBP; estimated fetal weight (EFW), head circumference (HC), biparietal diameter (BPD), abdominal circumference (AC) and femur length (FL) and maternal height (MH) ratio to predict cesarean delivery (CD) due to labor dystocia (LD).

Materials and Methods: This retrospective case-control study was conducted at the Department of Obstetrics and Gynecology, Bhumibol Adulyadej Hospital, Bangkok, Thailand, between January 2022 and December 2023. Inclusion criteria were pregnant women with singleton, cephalic presentation, termed and without contraindication of vaginal delivery.

Results: A total of 243 parturients were included in the study,with a mean age of 28.6 years. The cesarean delivery rate was 34.1% (83/243). The predictive model was developed incorporating variables including parity, maternal age, gestational diabetes mellitus (GDM), weight, and the FBP/MH ratio. The predictive model for CD due to LD demonstrated an AUC of 0.905, indicating excellent performance. Sensitivity, specificity, negative predictive value (NPV), positive predictive value (PPV), positive likelihood ratio (LR+), and negative likelihood ratio (LR-) were 91.6, 74.4, 94.4, 65, 3.57 and 0.11 percent, respectively.

Conclusion: The FBP/MH ratio is an independent risk factor for predicting CD due to LD. The predictive model of CD due to LD gave sensitivity, specificity, NPV and PPV at percentages of 91.6, 74.4, 65 and 94.4 respectively. This model might be a simple screening tool for labor attending personnel.

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