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Impact of full vs empty urinary bladder on external cephalic version success: a randomized controlled trial
Doron Kabiri1, Rani Haj Yahya2, Shlomi Yahalomi1
1Hadassah Medical Organization and Faculty of Medicine, Department of Obstetrics and Gynecology, Hebrew University of Jerusalem, Jerusalem, Israel (Dr Kabiri, Dr Yahya, Dr Yahalomi, and Dr Ezra).
American Journal of Obstetrics & Gynecology MFM
|January 18, 2024
Summary
A full or empty bladder does not significantly impact external cephalic version success rates. This randomized trial suggests women do not need a full bladder to improve outcomes for this procedure.
Area of Science:
- Obstetrics and Gynecology
- Fetal Medicine
Background:
- External cephalic version (ECV) is a procedure to convert a breech presentation to a cephalic presentation before delivery.
- The influence of maternal factors, such as bladder volume, on ECV success remains debated.
Purpose of the Study:
- To investigate the impact of urinary bladder status (full vs. empty) on the success rate of external cephalic version.
- To provide evidence-based guidance for optimizing ECV procedures.
Main Methods:
- A prospective randomized controlled trial involving 70 women with singleton breech presentations at term.
- Participants were randomized into two groups: ECV with an empty bladder and ECV with a full bladder.
- Procedures were performed by experienced obstetricians under ultrasound guidance.
Main Results:
- The success rate for ECV was 67.56% in the full bladder group and 54.54% in the empty bladder group.
- No statistically significant difference in success rates was observed between the two groups (P=.26).
- Relative risk for successful ECV was 1.23 (95% CI, 0.84-1.81), confirming no significant difference.
Conclusions:
- Urinary bladder volume (full or empty) does not significantly affect the success rate of external cephalic version for term singleton breech presentations.
- Current findings indicate that a full bladder is not necessary to enhance ECV success rates.
- This suggests a potential simplification in pre-procedural preparation for ECV.
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