IRCT20191007045023N1 IRCT 2019-11-08 Iran University of Medical Sciences The effect of phenylephrine on blood pressure and nausea and vomiting in pregnant women Comparison of the Effect of Phenylephrine Prophylactic Infusion with Placebo Group on Hypertension and Nausea and Vomiting of Pregnant Women During Cesarean Section Under Spinal Anesthesia 2019-01-01 anticipated 120 Complete https://irct.ir/trial/43083 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: A quadratic permutation block method was used. Subjects in blocks 1, 3 and 5 entered into the control group and subjects in blocks 2, 4 and 6 entered into the intervention group and simple randomized table was used to select blocks. The random assignment sheet will be used by trained personnel to assign patients to study groups (Concealment), Blinding description: The placebo was similar to the drug regarding shape of syringe, color, and volume and the researcher and patient were not aware of the type of injection or placebo. The outcome assessor did not know the types of the patient's intervention and only had the patient's specific code. 3 Pregnancy. Intervention 1: Intervention group: In the intervention group, 35 µg / kg phenylephrine was injected. Spinal anesthesia was performed with 12 mg bupivacaine 0.6% in a sitting position in the L3-L4 or L5-L4 space using the G25 spinal needle. After anesthesia, the patient was placed in the retina position with a slight displacement of the uterus to prevent uterine pressure on the aorta and vena cows. By the time of the baby's birth, blood pressure is measured every two minutes. Intervention 2: Control group: 0.9% normal saline serum was injected. Then spinal anesthesia was performed with 12 mg Bupivacaine 0.5% in sitting position in space of L3-L4 or L5-L4 using spinal needle G25. Yes - There is a plan to make this available What will be shared: The data will be available one month after the responsible person's approval When: The access period will start from 2019 to 2021 To whom: Data will be available to researchers working in the university. Conditions: Just for performing research Where to obtain: Refer to the responsible person for accessing the data How to obtain: The data will be available one month after the responsible person's approval Comments: