Fetal head–symphysis distance and mode of delivery in the second stage of labor

Youssef, A.; Maroni, E.; Cariello, L.; Bellussi, Federica; Salsi, G.; Morselli-Labate, Antonio Maria; Paccapelo, Alexandro; Rizzo, Nicola; Pilu, Gianluigi; Ghi, T.

doi:10.1111/aogs.12454

Cited by 31 publications

(25 citation statements)

References 27 publications

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“…The use of ITU enables the objective measurement of birth progress and improves the understanding of normal and abnormal labor [8,20,28,29] . In particular, AoP Table 2.…”

Section: Discussionmentioning

confidence: 99%

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Automated Measurement of the Angle of Progression in Labor: A Feasibility and Reliability Study

et al. 2016

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Objectives: The aim of this paper was to assess the feasibility and reliability of a new automated method for the measurement of the angle of progression (AoP) in labor. Methods: AoP was assessed using two-dimensional transperineal ultrasound by two operators in 52 women in active labor to evaluate intra- and interobserver reproducibility. The intermethod agreement between automated and manual techniques was analyzed by means of the intraclass correlation coefficient and Bland-Altman method. Results: Automated measurements were feasible in all cases. Automated assessments correctly depicted the pubic symphysis and fetal head in 133 (85.3%) out of 156 on first assessments and in all 156 after repeating measurements once in case of incorrect first evaluation. The automated technique showed good intra- and interobserver reproducibility and very good agreement with the manual technique. AoP measured by the automated method were significantly wider than those done by the manual technique (119 ± 20° vs. 130 ± 20°, p = 0.005). Conclusions: Automated assessment AoP is feasible and reproducible. However, measurements performed by the automated software are significantly different from those resulting from the previously published manual technique. In the light of our data, the automated technique does not seem ready yet for clinical use, and the AoP should be exclusively measured by the previously suggested manual technique.

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“…The use of ITU enables the objective measurement of birth progress and improves the understanding of normal and abnormal labor [8,20,28,29] . In particular, AoP Table 2.…”

Section: Discussionmentioning

confidence: 99%

“…AoP has also been found to strongly correlate with the sonographically determined head station, allowing for conversions between the two parameters [8] . Furthermore, many studies have demonstrated a strong association between AoP and labor outcome [4,6,7,[18][19][20] .…”

Section: Introductionmentioning

confidence: 99%

Automated Measurement of the Angle of Progression in Labor: A Feasibility and Reliability Study

et al. 2016

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“…The predictive ability of SPA measurement on labor outcome was marginally significant, but this should not sound surprising since labor is a complex process, and it is unlikely that a single parameter may be strongly predictive for its final outcome. It has been recently suggested that the combination of different clinical and sonographic parameters may be of help in tailoring for each woman the risk of prolonged labor and obstetric intervention [9,10]. In this respect, the addition of SPA measurement to the other maternal and intrapartum variables may further improve the performance of a multiparametric predictive model for the mode of delivery.…”

Section: Discussionmentioning

confidence: 99%

Subpubic Arch Angle and Mode of Delivery in Low-Risk Nulliparous Women

et al. 2015

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Objective: To assess whether subpubic arch angle (SPA) measurement before labor onset can predict labor outcome among low-risk pregnant women. Methods: 3D ultrasound volume was transperineally acquired from a series of nulliparous women with uncomplicated pregnancy at term before the onset of labor. SPA was measured offline using Oblique View Extended Imaging (OVIX) on each volume performed by an investigator not involved in the clinical management. Labor outcome was prospectively investigated in the whole study group. Results: Overall, 145 women were enrolled in the study. Of these, 83 underwent spontaneous vaginal delivery, whereas obstetric intervention was performed in 62 cases (Cesarean section in 40 and vacuum extraction in 22). The SPA appeared to be significantly narrower in the women submitted to obstetric intervention compared with those undergoing spontaneous vaginal delivery (116.8 ± 10.3° vs. 123.7 ± 9.6°, p < 0.01). At multivariate analysis SPA and maternal age were identified as independent predictors of the mode of delivery. On the other hand, the duration of labor did not show a significant relationship with SPA. Conclusions: In low-risk nulliparous women at term gestation, SPA measurement obtained by 3D ultrasound before the onset of labor seems to predict the likelihood of an obstetric intervention but not the duration of labor.

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“…A number of studies have suggested that the use of ultrasound during labor enables clinicians to evaluate objectively progression of labor in a more accurate and reproducible manner than traditional digital vaginal examination. Transperineal sonography (TPS), in particular, has been reported recently to be a useful tool for predicting mode of delivery and successful instrumental vaginal delivery.…”

Section: Introductionmentioning

confidence: 99%

Prediction of time to delivery by transperineal ultrasound in second stage of labor

Yonetani

Yamamoto

Murata

et al. 2017

Ultrasound Obstet Gynecol

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Fetal head–symphysis distance and mode of delivery in the second stage of labor

Abstract: Ultrasonographic measurement of head-symphysis distance in the second stage of labor can be used to predict operative delivery.

Cited by 31 publications

References 27 publications

Automated Measurement of the Angle of Progression in Labor: A Feasibility and Reliability Study

Automated Measurement of the Angle of Progression in Labor: A Feasibility and Reliability Study

Subpubic Arch Angle and Mode of Delivery in Low-Risk Nulliparous Women

Prediction of time to delivery by transperineal ultrasound in second stage of labor

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