Evaluation of effects of mother oxygen therapy on neonate's umbilical vein blood Gas after cesarean section under spinal anesthesia

Central neuraxial block can impair respiratory function by paralysis of the breathing muscles due to a high block. Satisfactory regional anesthesia for Caesarean delivery requires a block level to at least the T4 dermatome and this can alter respiratory performance. Increasing inspired maternal oxygen may increase oxygen delivery to the fetus during general anesthesia or epidural and spinal anesthesia. The aim of this study is finding scientific evidence for oxygen efficacy on fetal oxygenation in cesarean procedure. This study is performed on 100 pregnant patients who were candidate of cesarean section under spinal anesthesia. These patients were assigned into two groups (experimental and control, 50 cases in each group). For study group oxygen 6l/ml with mask was given after spinal anesthesia but the control group did not receive oxygen. Case and control group assessing with pulse oxymetery and neonatal VBG analysis. Comparison between the groups was performed with Chi-square and Paired T-test and Fisher test. All tests were performed by SPSS program. The mean age of case and control group was 27.1 and 26.8 years. Maternal (p=0.0001) and neonatal (p=0.002) O2 saturation, PVO2 (P=0.00002), PVCO2 (P=0.0003) SVO2 (P=0.0001) had significant difference in cases and control groups. Apgar and pH, has not significant difference in cases and control group. According to this finding, it is thought be the oxygen therapy is useful for fetal oxygenation. More study is necessary to find the better management method.