Effects of Supplemental Oxygen on Maternal and Neonatal Oxygenation in Elective Cesarean Section under Spinal Anesthesia: A Randomized Controlled Trial

Table 3

Neonatal data.

Variables	Room-air group	Oxygen group	𝑃 value
	(𝑛=163)	(𝑛=162)
Fetal heart sound before spinal block (BPM)	140.3±9.0	140.7±9.4	0.66
Fetal heart sound after spinal block (BPM)	141.6±10.4	140.6±9.4	0.39
Apgar score at 1 minute	9 (7,10)	9 (7,10)	0.53
Apgar score at 5 minute	10 (9,10)	9 (9,10)	0.79
Umbilical cord gas analysis
UV pH	7.36±0.06	7.37±0.06	0.08
UV pO2 (mmHg)	25.57±5.89	28.37±7.91	0.000
UV pCO2 (mmHg)	42.91±6.77	43.52±6.14	0.40
UV HCO3 (mEq/L)	24.72±3.06	25.39±3.12	0.049
UV base excess	−0.69±3.42	0.07±3.48	0.06
UV O2 saturation (%)	45.44±14.92	51.08±17.54	0.002
UA pH	7.30±0.06	7.31±0.06	0.781
UA pO2 (mmHg)	21.01±26.61	19.69±6.92	0.542
UA pCO2 (mmHg)	52.46±32.86	50.18±9.47	0.397
UA HCO3 (mEq/L)	24.92±3.75	25.13±4.29	0.569
UA base excess	−1.42±4.38	−1.16±4.53	0.607
UA O2 saturation (%)	24.95±15.90	27.37±15.36	0.168

Data presented as mean ± SD or median (minimum, maximum).
BPM: beat per minute; UV: umbilical vein; UA: umbilical artery.