A randomised double blind comparison of Syntometrine® and Syntocinon® in the management of the third stage of labour

Authors

  • Pong Mo Yuen,

    Senior Medical Officer , Corresponding author
    1. Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong
      Correspondence: Dr. P. M. Yuen, Department of Obstetrics and Gynaecology. Prince of Wales Hospital, Shatin, N.T., Hong Kong.
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  • Norman S. T. Chan,

    Medical Oficer
    1. Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong
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  • So Fan Yim,

    Medical Officer
    1. Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong
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  • Allan M. Z. Chang

    Professor
    1. Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong
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Correspondence: Dr. P. M. Yuen, Department of Obstetrics and Gynaecology. Prince of Wales Hospital, Shatin, N.T., Hong Kong.

ABSTRACT

Objective To compare the effect of intramuscular Syntometrine and Syntocinon in the management of the third stage of labour.

Design A randomised double blind prospective study.

Setting Department of Obstetrics and Gynaecology, Prince of Wales Hospital, Hong Kong.

Subjects One thousand consecutive patients with singleton pregnancy and vaginal delivery in February and March 1993.

Results The use of Syntometrine in the management of the third stage not only reduced the blood loss after delivery but was associated with a 40% reduction in the risk of postpartum haemorrhage (odds ratio 0.60; 95% CI 0.21–0.88), and the need for repeat oxytocic injections (odds ratio of 0.63; 95% CI 0.44–089). The two drugs did not differ in their effect on the duration of the third stage. However, the incidence of manual removal of the placenta was higher when Syntometrine was used (odds ratio 3.7; 95% CI 1.03–123), although the overall incidence remained low. Side effects from both drugs, such as nausea, vomiting, headache and hypertension, were uncommon.

Conclusion Intramuscular Syntometrine is a better choice than Syntocinon in the management of the third stage of labour.

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