Accuracy of Transvaginal Ultrasound Measured Cervical length and Bishop Score in Predicting Successful Induction of Labor at Term
Objectives: To assess the accuracy of transvaginal ultrasound measured cervical length and bishop score in predicting successful induction of labor at term.
Methodology: The study was conducted at Departments of Radiology and Obstetrics & Gynecology, Sargodha Medical College, DHQ hospital Sargodha, in a period of six months from November 2021 to April 2022. After initial cervical assessments and vaginal examination, females were classified as favorable or unfavorable cases based on the bishop score. The researcher herself then performed transvaginal ultrasonography on female subjects. The women's bladders were empty when they were inspected in the dorsal lithotomy position. When the exterior cervical os, cervical canal, and internal cervical os were visible, a sagittal plane through the cervix was detected and cervical length was measured. When a vaginal delivery occurs within 24 hours it was considered as successful induction.
Results: In this study, a total of 131 women were included, of whom 80 (61.07%) had normal vaginal delivery and 51 (38.93%) delivered through caesarean section. The mean age was comparatively (P-value < 0.05) higher in caesarian section group. The mean cervical length was found to be significantly (P-value < 0.05) higher in women who delivered by caesarean section (27.95 ± 7.24 vs. 24.85 ± 7.68 mm) in comparison to normal delivery group. The sensitivity (87.50% vs. 80.0%) and specificity (56.29% vs. 35.29%), Positive Predictive Value (76.09% vs. 65.98%), and Negative Predictive Values (76.09% vs. 65.98%), and Negative Predictive Values (76.09% vs. 65.98%) were comparatively higher on the basis of cervical length (27 mm) in comparison to the bishop score (> 5).
Conclusion: Transvaginal sonography of cervical length is more accurate and objective than the Bishop Score, and it can be used to predict the likelihood that a labour induction would be successful.
Copyright (c) 2022 Journal of The Society of Obstetricians and Gynaecologists of Pakistan
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.