Key result
Phenylephrine and ephedrine were equally effective in treating spinal anesthesia-induced hypotension, but neonates of mothers receiving phenylephrine had a significantly higher umbilical artery pH (7.34 vs 7.31, p=0.04).
Why the study?
Hypotension affects 70-75% of patients undergoing cesarean section under spinal anesthesia and may have detrimental maternal and fetal effects, prompting a comparison of phenylephrine and ephedrine.
Does phenylephrine improve umbilical artery pH compared to ephedrine in pregnant women with spinal anesthesia-induced hypotension during cesarean section?
Comparison
Phenylephrine 100 µg IV bolus vs ephedrine 6 mg IV bolus
Design
Prospective, randomized, double-blind comparative study
Authors
Loading...
Both agents remain viable for SA-induced hypotension in CS; leaves open whether phenylephrine's higher umbilical pH improves outcomes beyond equivalent Apgar scores.
RCT (n=40)
Double-blind
Computer-generated randomization
No
Does phenylephrine improve umbilical artery pH compared to ephedrine in pregnant women with spinal anesthesia-induced hypotension during cesarean section?
Absolute Event Rate: 7.34% vs 7.31%
p-value: p=0.04
Phenylephrine and ephedrine are equally effective in treating spinal anesthesia-induced hypotension during cesarean section, but phenylephrine results in significantly less fetal acidosis.
Singh et al. (2021) conducted an RCT in Hypotension during cesarean section under spinal anesthesia (n=40). Phenylephrine vs. Ephedrine 6 mg IV bolus was evaluated on Umbilical artery pH (p=0.04). Phenylephrine and ephedrine were equally effective in treating spinal anesthesia-induced hypotension, but neonates of mothers receiving phenylephrine had a significantly higher umbilical artery pH (7.34 vs 7.31, p=0.04).
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: