Accurate evaluation of the progress of delivery with Transperineal ultrasound may increase vaginal delivery: a single-center retrospective study

Abstract

Abstract Although evaluation by digital examination of the cervix is the standard method used worldwide for evaluating the progress of delivery, it has a problem because it is subjective. Transperineal ultrasound (TPU) is used as an adjunct to digital evaluation for accurate assessment of the fetal descent and rotation of the advanced part of the fetus. This study aimed to clarify the impact of the introduction of TPU on perinatal outcomes at Mie university hospital. This retrospective study analyzed single pregnant women who underwent delivery management at our hospital between April 2020 and March 2021. Perinatal outcomes were compared between patients who were used TPU (TPU+ group) and those who were not used TPU (TPU- group). The angle of progression and head direction were measured. The rate of vaginal delivery was significantly increased, and the second stage of labor was significantly prolonged in the TPU+ group. There was a significant difference between termination in the latent phase occurred in 3/8 (38%) cases in the TPU+ group and 20/25 (80%) cases in the TPU- group. The rate of vaginal delivery may be increased by accurate evaluation of the progress of delivery with TPU.