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Transvaginal US of cervix before labor induction: instead of digital exam?(Obstetrics)
PARIS -- Transvaginal ultrasound of the cervix is a potential alternative to digital examination before induction of labor, Dr. Elisabeth Peregrine said at the 13th World Congress on Ultrasound in Obstetrics and Gynecology.
The Bishop score--comprising position of the cervix in relation to the vagina, cervical consistency, dilation, effacement, and station of the presenting part--was created in 1964 and remains the standard of cervical assessment before induction of labor (IOL). Although simple and reproducible, the method is highly subjective and is a poor predictor of IOL outcome, said Dr. Peregrine of University College London.
Transvaginal sonography (TVS), on the other hand, is objective, less invasive, and allows for visualization of the supravaginal cervix as well as the vagina, which is impossible to accomplish digitally if the cervix is closed, she noted.
In 248 women undergoing IOL after 36 weeks' gestation, TVS was performed before induction to assess cervical length and internal and external os dilatation.
Those measurements were compared with the corresponding modified Bishop score measurements done immediately before IOL by midwives who were blinded to the ultrasound results, Dr. Peregrine said.
Both TVS cervical length and internal os dilatation were correlated with the corresponding parts of the modified Bishop score as well as with the total Bishop ...
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Source: HighBeam Research, Transvaginal US of cervix before labor induction: instead of digital...