Data regarding the optimum dose of norepinephrine for management of severe maternal hypotension is lacking. A previous report showed that the use of 10-mcg norepinephrine bolus was not superior to the 5-mcg bolus in the management of severe hypotension in addition the incidence of reactive bradycardia and hypertension was comparable in the two doses. Therefore, we hypothesize that using a higher dose of norepinephrine (15 mcg) would increase the success rate of management of severe hypotensive episode.
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the incidence of successful management of severe post-spinal hypotension
Timeframe: 1 min after spinal anesthesia until 5 min after the delivery