Feasibility, Reliability, and Agreement of Transperineal Ultrasound Measurement: Results from a Longitudinal Cohort Study

Kwan, Alan; Chaemsaithong, Piya; Tse, Wing Ting; Appiah, Kubi; Chong, Ka Chun; Leung, Tak Yeung; Poon, Liona C.

doi:10.1159/000507549

Cited by 4 publications

(5 citation statements)

References 42 publications

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“…61,65,66 Angle of progression (Figure 5) is the angle between the sagittal midline of the symphysis pubis and line dropping from the lowermost point of the symphysis pubis tangentially to the deepest point of the fetal head, on transperineal ultrasound. 67 The automated assessment of AoP, now available in some ultrasound systems, measures the AoP in a parasagittal plane and was demonstrated to be feasible, correlate well with assessment of fetal station by vaginal examination 68 and in excellent agreement with the originally described midsagittal AoP 69 .…”

Section: Assessment Of Fetal Head Position and Stationmentioning

confidence: 61%

The usefulness of ultrasound before induction of labor

Kamel

Garcia

Poon

et al. 2021

American Journal of Obstetrics & Gynecology MFM

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Section: Assessment Of Fetal Head Position and Stationmentioning

confidence: 61%

The usefulness of ultrasound before induction of labor

Kamel

Garcia

Poon

et al. 2021

American Journal of Obstetrics & Gynecology MFM

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“…Benediktsdottir et al reported ultrasound to be unable to measure CD > 8 cm [34]. Kwan et al reported overall good agreement of DE and TPU measurements for CD while also stating that the ability of TPU to measure CD decreased with growing CD [35]. This suggests that TPU is more suitable for the latent stage than for the later stages of labour.…”

Section: Discussionmentioning

confidence: 99%

Digital Examination vs. 4D Transperineal Ultrasound—Do They Compare in Labour Management? A Pilot Study

Exner,

Caspers,

Kennes

et al. 2024

Diagnostics

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The aim was to compare transperineal ultrasound (TPU) with parameters of the Bishop Score during the first stage of labour and evaluate how TPU can contribute towards improving labour management. Digital examination (DE) and TPU were performed on 42 women presenting at the labour ward with regular contractions. TPU measurements included the head–symphysis distance, angle of progression, diameter of the cervical wall, cervical dilation (CD) and cervical length (CL). To examine if TPU can monitor labour progress, correlations of TPU parameters were calculated. Agreement of DE and TPU was examined for CL and CD measurements and for two groups divided into latent (CD < 5 cm) and active stages of labour (CD ≥ 5 cm). TPU parameters indicated a moderate negative correlation of CD and CL (Pearson: r = −0.667; Spearman = −0.611). The other parameters showed a weak to moderate correlation. DE and TPU measurements for CD showed better agreement during the latent stage than during the active stage. The results of the present study add to the growing evidence that TPU may contribute towards an improved labour management, suggesting a combined approach of TPU and DE to monitor the latent first stage of labour and using only DE during the active stage of labour.

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“…More and more information about the use of ultrasound for the assessment of labor progress has been accumulated in recent years, and it has become a relatively new way of assessing childbirth [37]. Transperineal ultrasound parameters (HPD and AOP) significantly correlated with each other as well as with both labor progress and mode of birth [38][39][40][41][42][43]. Chan and Ng [41] suggested that a combination of AOP and HPD can increase their predictive potential of normal vaginal birth and sensitivity to 97.7%.…”

Section: Discussionmentioning

confidence: 99%

Accuracy of non-invasive methods for assessing the progress of labor in the first stage: a systematic review and meta-analysis

Pan

Chen

Gau

2022

BMC Pregnancy Childbirth

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Background The World Health Organization in recent years has emphasized reducing the possibility of unnecessary interventions in natural childbirth, but little is known about the accuracy of non-invasive methods when assessing the progress of labor. This paper presents a literature review to assess strategies that support non-invasive methods for labor during the first stage. It evaluates the available evidence to provide the most suitable assessments and predictions that objectively identify the progress of low-risk labor during the first stage of labor. Methods A search for relevant literature was conducted using the electronic databases of PubMed, CINAHL, Web of Sciences, the Cochrane Library, Scopus, Medline (OVID), and CEPS, with publications up to November 2021. Records were screened against pre-specified inclusion/exclusion criteria and the potential papers from Google Scholar were examined to identify additional papers that may have been missed. The Quality Assessment of Diagnostic Accuracy Studies-2 (QUADAS-2) tool was used to appraise the methodological quality of the included studies. The certainty of the evidence was assessed using the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) approach. Two independent investigators extracted the review’s characteristics, and discrepancies were resolved by consensus. This review calculated individual and pooled sensitivity, specificity, and positive predictive values, which were exported to STATA (version 14; Stata Corp., College Station, TX) to represent the performance of diagnostic testing. Results Our search returned 2283 reports of which 13 fulfilled the inclusion criteria, accounting for 2594 women. The subjects were divided into groups according to the diagnostic tests used to assess the progress of their labor, including appearance assessment and sonographic imaging parameters (head perineum distance, HPD; angle of progression, AOP, and other parameters). HPD pooled sensitivity was 0.74 (0.65–0.82), and specificity was 0.77 (0.69–0.84). The pooled diagnostic odds ratio (DOR) was 8.21 (4.67–14.41) and 10.34 (5.02–21.27), respectively. The results of subgroup analysis showed that the summary sensitivity and specificity were of medium accuracy overall. The quality of evidence as assessed with GRADE was low. Conclusion Vaginal examination is an intrinsic element in the use of the partogram, while transperineal ultrasound can also be used as an auxiliary tool. However, the presence of publication bias within the parameters of ultrasound indicates that the diagnostic performance may be overestimated. Thus, randomized controlled trials or large-scale prospective cohort studies are necessary.

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Feasibility, Reliability, and Agreement of Transperineal Ultrasound Measurement: Results from a Longitudinal Cohort Study

Cited by 4 publications

References 42 publications

The usefulness of ultrasound before induction of labor

The usefulness of ultrasound before induction of labor

Digital Examination vs. 4D Transperineal Ultrasound—Do They Compare in Labour Management? A Pilot Study

Accuracy of non-invasive methods for assessing the progress of labor in the first stage: a systematic review and meta-analysis

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