Study of the Effect of Dexamethasone and Normal Saline in Reducing Headache after Spinal Anesthesia in Cesarean Section

/ 0 : 5D E 3 G H D " ! & 0; + *) IJ " ! 2 " 3 KL ; MJ 1 5 N) " & O " 4 K ) P Q" R; ! * 3 2. " : H !# 8 ) > S 1 KILM " $ # 2 H . ) 9 ( . V . 2; 3 " $ 2 3#& B % 2 1 7 4 + W 3 * $ B 2 ) X C 0 Q< +) * 3 O # ) 7: " #& . YD $) + BH $) # 4B 1 Z H ) 9 P / \ X" B * + " X B $ $ ) & N D " D 1 # " > 3 P O ) 2 O & " $ 4 ] : H R " ] 0 * 4; 5 ) 78 ) ^ . * + _2% `# * )H 4& SPSS * H $ H ) %) ; B 4"D H .