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. 2023 Nov 28;13(1):20945.
doi: 10.1038/s41598-023-47457-2.

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

Naosuke Enomoto  1   2 , Shintaro Maki  3 , Masafumi Nii  3 , Mizuki Yamaguchi  3 , Yuya Tamaishi  3 , Sho Takakura  3 , Shoichi Magawa  3 , Kayo Tanaka  3 , Hiroaki Tanaka  3 , Eiji Kondo  3 , Shinji Katsuragi  4 , Tomoaki Ikeda  3
Affiliations

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

Naosuke Enomoto et al. Sci Rep. .

Abstract

Although digital examination of the cervix is the standard method used worldwide for evaluating the progress of delivery, it is subjective. Transperineal ultrasound (TPU) is combined with digital evaluation for accurate assessment of fetal descent and rotation of the advanced part of the fetus. This retrospective study aimed to clarify the impact of introducing TPU on perinatal outcomes at Mie University Hospital. We analyzed singleton pregnant women who underwent delivery management at our hospital between April 2020 and March 2021. Perinatal outcomes were compared between patients who used TPU (TPU+ group) and those who did not (TPU- group). The angle of progression and head direction were measured. The rate of vaginal delivery was significantly increased (90.9% vs. 71.6%; P = 0.0017), and the second stage of labor was significantly prolonged in the TPU+ group (148.1 vs. 75.8 min; P < 0.0001). A significant difference was observed in termination in the latent phase between the TPU+ group [3/8 (37.5%) cases] and TPU- group [20/25 (80.0%) cases] (P = 0.036). The rate of vaginal delivery can be increased through accurate evaluation of the progress of delivery with TPU.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Figure 1
Figure 1
The number of cases (percentage) of the mode of delivery.
Figure 2
Figure 2
The trends of change in AoP in the TPU+ group. This graph depicts the plots of the measurement of the TPU+ group. Black dots represent vaginal delivery cases, and white dots represent vacuum cases. One patient, illustrated by the thick solid line, underwent an emergent cesarean section after a failed vacuum delivery at the arrowed point.
Figure 3
Figure 3
The trends of change in AoP of spontaneous or vacuum delivery with/without anesthesia. This is a graph of hourly changes measured with the center of the horizontal axis at the point of full dilation. The vertical axis represents the angle of AoP.
See this image and copyright information in PMC

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