N S Chan

Publications (2)1.24 Total impact

• Article: Intrauterine retention of fetal bone.

  N S Chan
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  ABSTRACT: A case of secondary infertility, dysmenorrhoea and menorrhagia due to retained fetal bone is presented. Retained fetal bones should be considered in all patients with infertility, dysfunctional uterine bleeding, dysmenorrhoea or other symptoms dating from a pregnancy or pregnancy termination. Ultrasound is an excellent modality for evaluating these patients. Ultrasound is also very useful for the follow-up of patients after surgical removal of the bony fragments. Some bony fragments may be embedded in the endometrium or myometrium and may not be identified at curettage. Hysteroscopy is valuable in both establishing the diagnosis and the removal of bony fragments. A crucial aspect of the procedure involves reintroduction of the hysteroscope to document that the cavity is clear after attempts at bone removal are complete. After removal of bony fragments, restoration of fertility and improvement of symptoms are expected.
  Australian and New Zealand Journal of Obstetrics and Gynaecology 09/1996; 36(3):368-71. · 1.24 Impact Factor
• Article: A randomised double blind comparison of Syntometrine and Syntocinon in the management of the third stage of labour.

  P M Yuen, N S Chan, S F Yim, A M Chang
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  ABSTRACT: To compare the effect of intramuscular Syntometrine and Syntocinon in the management of the third stage of labour. A randomised double blind prospective study. Department of Obstetrics and Gynaecology, Prince of Wales Hospital, Hong Kong. One thousand consecutive patients with singleton pregnancy and vaginal delivery in February and March 1993. 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 0.44-0.89). 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 1.03-12.5), although the overall incidence remained low. Side effects from both drugs, such as nausea, vomiting, headache and hypertension, were uncommon. Intramuscular Syntometrine is a better choice than Syntocinon in the management of the third stage of labour.
  British Journal of Obstetrics and Gynaecology 06/1995; 102(5):377-80.