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

Table 1

Perioperative maternal characteristics.

Variables	Room-air group	Oxygen group	𝑃 value
	(𝑛=163)	(𝑛=162)
Age (years)	28.7 ± 3.1	28.5 ± 3.3	0.55
Body mass index (kg/m^2)	27.4 ± 3.0	27.2 ± 3.2	0.74
Indications for surgery			0.44
Previous cesarean section	103 (63.2)	94 (58.0)
Elective cesarean section	34 (20.9)	45 (27.8)
Breech presentation	9 (5.5)	9 (5.6)
Cephalopelvic disproportion	4 (2.5)	1 (0.6)
Other	13 (7.9)	13 (8.0)
Baseline hematocrit (%)	35.7 ± 2.8	35.6 ± 3.1	0.79
Amount of preload fluid (mL)	476.7 ± 194.5	467.3 ± 217.0	0.68
Total dose of 0.5% heavy Marcaine and morphine for spinal block	2.2 ± 0.1	2.2 ± 0.1	0.19
Uterine incision to delivery interval (seconds)	143 ± 231	151 ± 75	0.27
Intraoperative hypotension	132 (81.0)	113 (69.8)	0.01
Ephedrine consumption (mg)	20.6 ± 11.0	18.4 ± 11.0	0.10
Norepinephrine consumption (𝜇g)	12.8 ± 9.8	13.1 ± 10.8	0.89
Received sedative drugs	9 (5.4)	15 (9)	0.45
Duration of surgery (minutes)	53.2 ± 13.5	52.8 ± 18.3	0.82
Estimated blood loss (mL)	358.0 ± 125.8	331.0 ± 122.6	0.05
Total fluid administration (mL)	1294.0 ± 341.3	1250.7 ± 342.1	0.26
Intraoperative desaturation	12 (7.4)	0 (0)	0.00

Data presented as mean ± SD or number (%).