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Related Experiment Videos

A way to lend objectivity to Bishop score.

M R M Elghorori1, I Hassan, W Dartey

  • 1Department of Obstetrics and Gynaecology, Norfolk and Norwich University Hospital, Norwich, Norfolk, UK. rabeih@elghorori.fsnet.co.uk

Journal of Obstetrics and Gynaecology : the Journal of the Institute of Obstetrics and Gynaecology
|June 7, 2006
PubMed
Summary

This study found that modifying the Bishop Score with transvaginal ultrasound cervical length measurements significantly improves prediction of labor induction outcomes. The enhanced score better predicts the induction-delivery interval and vaginal birth success.

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Area of Science:

  • Obstetrics and Gynecology
  • Medical Imaging
  • Reproductive Medicine

Background:

  • The Bishop Score is a clinical assessment tool used to evaluate cervical readiness for labor induction.
  • Its predictive accuracy for labor induction outcomes can be limited.
  • Transvaginal ultrasound offers an objective method for cervical length assessment.

Purpose of the Study:

  • To evaluate if incorporating transvaginal ultrasound cervical length measurements into the Bishop Score can enhance its predictive value for labor induction.
  • To compare the predictive accuracy of the original Bishop Score with a modified version that includes ultrasound data.

Main Methods:

  • A prospective study involving 104 women undergoing labor induction.
  • The Bishop Score was calculated both traditionally and in a modified form, replacing digital cervical length assessment with transvaginal ultrasound measurements.

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  • Statistical analysis compared the original and modified scores regarding their association with induction-delivery interval and mode of delivery.

    • Main Results:

    • The modified Bishop Score showed a statistically significant difference compared to the original score (p < 0.0001).
    • The original Bishop Score had no significant association with induction-delivery interval or mode of delivery (p > 0.05).
    • The modified Bishop Score demonstrated significant associations with mode of delivery (r = 0.31, p < 0.05) and induction-delivery interval (r = 0.55, p < 0.0001).
    • Optimized cut-off values revealed the modified score significantly improved sensitivity for predicting vaginal delivery (62% vs. 23%) while maintaining high specificity (82% vs. 88.2%).

    Conclusions:

    • The modified Bishop Score, incorporating transvaginal ultrasound cervical length, is superior to the original score for predicting the induction-delivery interval and successful labor induction.
    • This modification significantly enhances the sensitivity of the Bishop Score in predicting vaginal delivery rates.