title: [Clinical study on the efficacy of tranexamic acid in reducing postpartum blood lose: a randomized, comparative, multicenter trial].
abstract: OBJECTIVE
  To study the efficacy and safety of Transamin (tranexamic acid) in reducing postpartum blood loss.
  
  
  METHODS
  Four hundred primipara with term singleton pregnancy, vertex presentation, spontaneous delivery were enrolled. Ten U Oxytocin was injected intravenously immediately after the delivery of fetal shoulders in the second stage of labor. Then all the puerperants were randomly assigned to 4 groups. Group I (n = 94): Transamin 1.0 g was injected i.v.; Group lI (n = 92): Transamin 0.5 g i.v.; Group III (n = 92): aminomethylbenzoic acid 0.5 g i.v. was given; Group IV (n = 87): no treatment. Vaginal bleeding was precisely collected, and examined immediately after the expulsion of placenta and from placenta expulsion till 2 hours after delivery. The amount of blood loss was measured by both methods of weight and volume.
  
  
  RESULTS
  There were no significant differences of blood loss immediately after the expulsion of placenta among the 4 groups (P > 0.05). For the average blood loss at 2 hour postpartum, it was 129.7 ml, 133.9 ml, 168.5 ml and 178.2 ml for group I, II, II and IV respectively, while the total blood loss for the 4 groups was 243.3 ml, 242.9 ml, 308.1 ml, and 314.8 ml respectively. The average blood loss of group I and II was significantly less than group III and IV (P < 0.01), however, there was no significant difference between group I and group II (P > 0.05). The occurrences of postpartum hemorrhage (blood lose > or = 400 ml) were 6.4%, 13.3%, 20.7% and 25.3% for group I, II, III and IV respectively. There was no major adverse effects appeared.
  
  
  CONCLUSIONS
  Transamin is efficient and safe in reducing the postpartum blood loss. 1.0 g of Transamin has the best efficacy, and 0.5 g of Transamin followed.
authors.affiliation: Department of Obstetrics and Gynecology, First Teaching Hospital of Beijing University, Beijing 100034, China.
authors.forename: H
authors.initials: H
authors.lastname: Yang
authors.forename: S
authors.initials: S
authors.lastname: Zheng
authors.forename: C
authors.initials: C
authors.lastname: Shi
mesh_terms: D000933:Antifibrinolytic Agents / Q000627:therapeutic use*; D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D010121:Oxytocin / Q000008:administration & dosage; D006473:Postpartum Hemorrhage / Q000517:prevention & control*; D011247:Pregnancy; D014148:Tranexamic Acid / Q000627:therapeutic use*; D016896:Treatment Outcome
chemical_list: D000933:Antifibrinolytic Agents; D010121:Oxytocin; D014148:Tranexamic Acid