The Influence of Body Mass Index on Sensorimotor Block and Vasopressor Requirement During Spinal Anesthesia for Elective Cesarean Delivery.

BACKGROUND: It has been suggested that the dose requirement for spinal anesthesia (SA) is lower in obese patients for cesarean delivery (CD). In this prospective, observational, noninferiority study, we tested the hypothesis that obesity would not have a clinically important effect on vasopressor requirements or block height. METHODS: Two groups of 25 parturients, group O (body mass index [BMI] >40 kg/m2) and group N (BMI

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