Correlation between lower uterine wall thickness measured by transabdominal ultrasonography and cervical length measured by transvaginal ultrasonography in Thai pregnant women

Woraboot, Wanitchar; Wanitpongpan, Prapat; Phaophan, Amprapha

doi:10.1016/j.jcma.2018.07.006

Cited by 11 publications

(4 citation statements)

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“…Lower uterine wall lies closely to the cervix and we hypothesized that the changes that originated in the cervix could involve the adjacent LUW as well. This idea was confirmed by the study of Woraboot et al which demonstrated a highly correlation between LUW thickness and CL at mid-trimester [14]. Sfakianaki et al also reported that thinning of the LUW occurs earlier in twin pregnancies destined to deliver prematurely [15].…”

Section: Introductionmentioning

confidence: 68%

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Association between lower uterine wall thickness measured at 18–22 weeks of gestation and risk of Preterm Birth: a prospective cohort study

Yapan

Wanitpongpan

Sripang

2022

BMC Pregnancy Childbirth

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Background Preterm labour prediction has been relied on history of previous preterm birth and cervical length of current pregnancy. However, universal cervical length measurement has some limitation. We aim to find a surrogate marker of cervical length to close the gap in preterm prevention program and lower uterine wall thickness seems promising. We generate the nomogram of lower uterine wall thickness during 18–22 weeks of gestation and evaluate the accuracy of LUW thickness as a predictor of preterm delivery before 37 weeks. Methods This prospective cohort study included 524 Thai singleton pregnant women at 18–22 weeks of gestation between November 2016 and October 2017. After signing informed consent, transabdominal ultrasonography was performed to examine fetal anatomical structures and to measure LUW thickness. The results were blinded to the caregivers. The outcomes of all pregnancies were followed. The LUW thickness at 10th percentiles was established and was correlated with the outcomes of pregnancy. The performance of LUW thickness at 10th percentile as a predictor of preterm delivery was calculated. The intra-observer and inter-observer reliability of measurement were assessed by intraclass correlation coefficient and Bland-Altman plot. Results Of the 524 pregnant women, 64 (12.2%) delivered before 37 weeks of gestation. The reference value of lower uterine wall thickness at 18–22 weeks was established. Mean and 10th percentile of LUW thickness were 6.2 and 4.5 mm respectively. The inter-observer and intra-observer variation of measurement were small (intraclass correlation coefficient = 0.926 and 0.989 respectively). Using LUW thickness at less than 4.5 mm as a predictor of preterm delivery, we found a 2.37 folds increased risk of preterm delivery after adjustment of other factors (p = 0.037). Sensitivity, specificity, positive predictive value and negative predictive value were 14% (95% CI: 6.64–25.02), 92.8% (95% CI: 90.06–95.12), 22.5% (95% CI: 12.66–36.76) and 88% (95% CI: 86.92–89.08) respectively. Conclusions The measurement of LUW thickness by transabdominal ultrasonography is feasible and reproducible. The risk of delivery before 37 weeks of gestation is increased significantly if the LUW thickness at 18–22 weeks is less than 4.5 mm. Trial registration The study protocol was approved by institutional ethical committee (COA No. Si 657/2016).

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Section: Introductionmentioning

confidence: 68%

“…and 10th percentile value = 4.2 mm.) [14]. We believe that the difference is not a result of different population as the characteristics of the participants in both studies were the same.…”

Section: Discussionmentioning

confidence: 85%

Association between lower uterine wall thickness measured at 18–22 weeks of gestation and risk of Preterm Birth: a prospective cohort study

Yapan

Wanitpongpan

Sripang

2022

BMC Pregnancy Childbirth

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“…Woraboot et al 4 reported that where trans-abdominal ultrasonography (TAUS) was performed to estimate the lower uterine wall thickness (LUS) and TVUS was performed to measure the CL in 166 singleton pregnant women, an extremely positive correlation between LUS with cut-off value was 4.4 mm, and CL at 16-32 weeks of gestation (rs ¼0.767, n¼166, p<0,001). So they believed that it's practical to imply that when the cervix is found long, the lower uterine wall would be thick, and when the cervix becomes shorter, the lower uterine wall would transform in the same direction i.e.…”

Section: Discussionmentioning

confidence: 99%

“…Using readily available transabdominal ultrasonography, the thickness of the lower uterine wall may be accurately measured in practically all clinical situations. 4 There is inverse association among the lower uterine segment thickness in addition to cervical length and increasing gestational age as the lower segment converts to be thinner. 5 The target of this study was to find the impact of ultrasonographically-estimated lower myometrium thickness along with cervical characteristics in the prediction of PTD.…”

Section: Cervicalmentioning

confidence: 99%

Correlation between uterine wall thickness measured via trans-abdominal ultrasonography and cervical characteristics measured via trans-vaginal ultrasonography and Prediction of Preterm delivery

Khalifa

Sedek²,

Elmazzaly³

et al. 2022

Al-Azhar International Medical Journal

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Background: Preterm delivery (PTD) is a principal obstetric dilemma and also a population health threat. The PTD etiology is still a field of abundant research worldwide. Aim of the work:To find the significance of ultrasonographicallyestimated lower myometrium thickness along with cervical characteristics in the prediction of PTD. Patients and methods: This study comprised 100 pregnant women (50 pregnant women who had risk factors of preterm labor and other 50 pregnant women without risk factors for preterm birth and with prior normal labor) during the period from March 2021 till the December 2021. Results: Our results revealed that CL was shorter in cases who had risk of preterm labor (24.84± 3.19 mm) compared to that of those without risk (26.8±1.98 mm) (P <0.001). While, the cut off value of cervical length was 25.5(mm) for predicting risk of preterm labor, the sensitivity was 62%, specificity was 76%. The mean thickness of both lower anterior and mid anterior uterine wall was significantly thinner in women with risk of PTD than those without (5.42±0.49 (mm) vs. 5.88±0.36 (mm)), (P<0.001) & (5.45±0.49 (mm) vs. 5.89±0.37 (mm) respectively) (P<0.001). ROC curve showed that the optimum cut-off values for low anterior and mid anterior uterine wall thickness were 5.51 and 5.52 (mm) for predicting risk of PTD with sensitivity 58% of both markers. Conclusion: Trans-abdominal ultrasound measurement of lower uterine segment thickness may represent an effective, precise, appropriate, and harmless procedure in anticipating the preterm labor with high validity than cervical length.

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Is it useful to measure uterine wall thickness to predict preterm delivery of pregnant women with adenomyosis?

Yeh

Lin

Wang

2019

Taiwanese Journal of Obstetrics and Gynecology

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Correlation between lower uterine wall thickness measured by transabdominal ultrasonography and cervical length measured by transvaginal ultrasonography in Thai pregnant women

Abstract: There was a highly positive correlation between lower uterine wall thickness measured by transabdominal ultrasonography and cervical length measured by transvaginal ultrasonography in Thai pregnant women.

Cited by 11 publications

References 11 publications

Association between lower uterine wall thickness measured at 18–22 weeks of gestation and risk of Preterm Birth: a prospective cohort study

Association between lower uterine wall thickness measured at 18–22 weeks of gestation and risk of Preterm Birth: a prospective cohort study

Correlation between uterine wall thickness measured via trans-abdominal ultrasonography and cervical characteristics measured via trans-vaginal ultrasonography and Prediction of Preterm delivery

Is it useful to measure uterine wall thickness to predict preterm delivery of pregnant women with adenomyosis?

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