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| Predictive value of cervical elastography parameters of full-term pregnant women during the third trimester of pregnancy on their prolongation of the first stage of labor |
| Dongtai People's Hospital, Dongtai, Jiangsu Province, 224200 |
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Abstract To explore the predictive value of cervical elastography parameters of full-term pregnant women during the third trimester of pregnancy on their prolongation of the first stage of labor. Methods: The clinical data of 82 full-term pregnant and lying-in women between August 2020 and August 2021 were selected in this study. All these women had received transvaginal ultrasound examination during the third trimester of pregnancy to measure their cervical length (CL) and the cervical elastography parameters, such as elasticity contrast index (ECI), hardness ratio (HR), mean value of internal cervical orifice strain (IOS), and mean value of external cervical orifice strain (EOS). The correlation between the examination parameters of the women and their prolongation of the first stage of labor was analyzed. Results: Among 82 women, there were 24 women with the prolonged first stage of labor (in group A) and 58 cases with normal first stage of labor (in group B). The CL and HR values of the women in group A were significantly higher than those of the women in group B, and the ECI value of the women in group A was significantly lower (P<0.05). There were no significant differences in the IOS and EOS values of the women between the two groups (P＞0.05). Correlation analysis showed that the values of CL and ECI of the women were negatively correlated with their duration of the first stage of labor (P<0.05), but the values of HR, IOS, and EOS of the women had no correlation with their duration of the first stage of labor (P＞0.05). The area under of receiver operating characteristic (ROC) curve of the CL and ECI values of the women for predicting their first stage of labor prolong were 0.819 (95%CI 0.718-0.895) and 0.854 (95%CI 0.759-0.922), the sensitivity of which were 83.3% and 75.0%, and the specificity of which were 58.3% and 84.5%. Conclusion: The values of transvaginal ultrasound measurement of CL and elastography parameter of ECI of the full-term women during the third trimester of pregnancy can assess their cervical maturity, and can predict their first stage of labor prolong, and which can guide the labor induction of the women.
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