• Eran Danon, Philip Heesen, Sharon Orbach-Zinger, Evgeniya Kornilov, Ariel Ronen, Carolyn Weiniger, and Leonid Eidelman.
• Department of Anesthesiology, Rabin Medical Center, Beilinson Hospital, Petach Tikva, Israel.
• Acta Anaesthesiol Scand. 2020 Nov 1; 64 (10): 1499-1504.

BackgroundWe performed an open controlled one-arm clinical trial to assess whether preoperative anxiety influences phenylephrine dosage required to maintain normotension during cesarean section under spinal anesthesia.MethodsNinety-four parturients undergoing elective cesarean delivery under spinal anesthesia were included. Anxiety levels were measured using a verbal numerical scale anxiety score (0-10). Phenylephrine infusion to prevent hypotension was adjusted by a standard algorithm. The primary outcome was total phenylephrine dose. Linear uni- and multivariate regressions were performed to assess the relationship between preoperative anxiety and the outcome. P < .05 was considered statistically significant.ResultsWe found no association between preoperative anxiety and phenylephrine dosage (R2  = 0.05). Taking the number of attempts for spinal anesthesia and surgical time into account did not lead to a significant improvement of the regression model.ConclusionIn conclusion, we did not find a large independent effect of preoperative anxiety on phenylephrine dose required to maintain normotension in our cohort. We believe that spinal hypotension and phenylephrine dose requirement are multifactorial and anxiety is only one of the factors in this complex interaction.© 2020 The Acta Anaesthesiologica Scandinavica Foundation. Published by John Wiley & Sons Ltd.

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