Randomized, Double Blind, Placebo Controlled Comparison of Ritodrine and Hexoprenaline for Tocolysis Prior to External Cephalic Version at Term

Authors

  • Anthony Stock MRCOG,

    Corresponding author
    1. Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
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    • 1

      Visiting Lecturer.

  • Tony Chung FRACOG,

    1. Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
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    • 2

      Lecturer.

  • Michael Rogers MRCOG,

    1. Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
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    • 3

      Senior Lecturer.

  • Wong Wai Ming MRCOG

    1. Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
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    • 4

      Medical Officer.


Department of Obstetrics and Gynaecology, Prince of Wales Hospital, Shatin, New Territories, Hong Kong.

Abstract

Summary: External cephalic versions in the study period were performed in a double blind design by 2 experienced practitioners. Sixty-three patients were allocated to treatment with either placebo, ritodrine or hexoprenaline. The main outcome measure studied was successful completion of external cephalic version. Hexoprenaline, but not ritodrine, was statistically more likely to be associated with successful version than placebo (p = 0.04 versus p = 0.22).

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