In cesarean section under general anesthesia, inhalation anesthetics may compound fetal acidosis brought by maternal hypoxia or uteroplacental insufficiency. The chance of fetal distress may be increased with prolonged induction-delivery (ID) and
uterine incision-delivery (UD) intervals in such cases.
These studies were undertaken to evaluate the changes of fetal acid-base and blood-gas status according to these intervals in 58 parturients given cesarean section under general anesthesia.
58 neonates were divided into three groups according to their ID interval [group 1 (N=26): less than 6 minutes, group 2 (N=25): 6 to 10 minutes, group 3 (N=7): 10 to 15 minutes] and four groups according to their UD interval(group A (N=25): less
than 60
seconds, group B (N=22): 60 to 90 seconds, group C (N=9): 90 to 120 seconds, group D (N=2): 120 to 180 seconds].
The pH, PCO2. PO2 and HCO3 values of the umbilical vein blood at delivery in the groups 1, 2, 3 divided according to ID intervals were 7.37±0.03, 7.36±0.04, 7.36±0.03; 39.75±4.83, 41.76±4.03, 38.81±2.31; 34,35±7.45, 32.65±9.63,
30.89±11.28
(in
mmHg); and 23.21±0.33, 23.30±0.26, 22.15±0.52 (in mEq/L), respectively, and in groups A, B, C , D divided according to UD intervals, they were 7.37±0.02, 7.37±0.02, 7.37±0.03, 7.36±0.06; 40.30±5.20, 40.63±3.11, 39.96±4.42, 40.03±5.09;
32.35±8.23, 31.82±0.17, 35.67±8.35, 33,53±10.53 (in mmHg); and 23.14±0.26, 23.60±0.36, 22.88±0.67, 23.35±0.35 (in mEq/L), respectively.
No significant differences in these values were present between these ID- or UD- based groups.
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