Key result
Norepinephrine bolus doses of 3, 4, and 5 µg resulted in comparable neonatal bicarbonate levels (p=0.944), while the 4- and 5-µg doses significantly decreased total norepinephrine requirements.
Why the study?
There is no established norepinephrine dose for managing postspinal hypotension, and data on its use in women with preeclampsia are limited.
Do 4 µg or 5 µg norepinephrine bolus doses compared to 3 µg improve neonatal bicarbonate levels and hemodynamics in mothers with preeclampsia experiencing postspinal hypotension during cesarean section?
RCT (n=60)
Double-blind
Computer-generated sequence
No
Do 4 µg or 5 µg norepinephrine bolus doses compared to 3 µg improve neonatal bicarbonate levels and hemodynamics in mothers with preeclampsia experiencing postspinal hypotension during cesarean section?
Absolute Event Rate: 21% vs 22%
p-value: p=0.944
Higher norepinephrine bolus doses (4 and 5 µg) reduce total norepinephrine requirements and recurrent hypotensive episodes compared to 3 µg without worsening neonatal outcomes in preeclamptic women undergoing cesarean section.
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Comparable neonatal outcomes with 3-5 µg NE boluses support flexible dosing in preeclamptic cesarean sections; extends limited RCT data on postspinal hypotension management.
Arafa et al. (2024) conducted an RCT in Preeclampsia with postspinal hypotension (n=60). Norepinephrine vs. 3 µg bolus was evaluated on Neonatal concentration of HCO3 from the umbilical cord sample (p=0.944). Norepinephrine bolus doses of 3, 4, and 5 µg resulted in comparable neonatal bicarbonate levels (p=0.944), while the 4- and 5-µg doses significantly decreased total norepinephrine requirements.
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