1- Objectives: Comparison between effects of Carbetocine and Syntometrin on postpartum hemorrhage prevention after cesarean section.
2- Design: Randomized single-blind clinical trial, without placebo control, single center trial recruitment, in the third Trial phase.
3- Setting, conducting and inclusion criteria: 90 pregnant women, candidate for primary cesarean section or experienced one with spinal anesthesia at Emam Ali hospital in Zahedan, are provided with explanations of methods for postpartum hemorrhage prevention after cesarean section. Then, the patients and their spouses fill out the consent forms. They are randomly assigned to two groups:
4- Intervention: The first group receives 30 units of oxytocin in 1 litter crystalloid, with 10cc/min rate, right after clamping the umbilical cord. Subsequently, they receive 30, 20 and 10 units of oxytocin IV infusion during the first 8 hours, second 8 hours and last 8 hours, respectively . The second group receives 0.5 ml Carbetocin IV directly, Equivalent to 50 microgram once, right after clamping the umbilical cord.
5- Exclusion criteria: patients with risk factors of PPH or other reason of PPH - except atonia - will exit trial. Also, presence of preeclampsia, hypotension, heart disease, and asthma will exclude a patient.
6- Main outcome: All patients are assessed 2,12, and 24 hours after delivery for uterine tonicity and blood pressure. 6 and 12 hours after delivery, hemoglobin is checked for estimation of postpartum hemorrhage. The two intervention groups are compared for the need of uterotonic drugs and the rate of side effects.