Abstract
Purpose
The role of dobutamine during septic shock resuscitation is still controversial since most clinical studies have been uncontrolled and no physiological study has unequivocally demonstrated a beneficial effect on tissue perfusion. Our objective was to determine the potential benefits of dobutamine on hemodynamic, metabolic, peripheral, hepatosplanchnic and microcirculatory perfusion parameters during early septic shock resuscitation.
Methods
We designed a randomized, controlled, double-blind, crossover study comparing the effects of 2.5-h infusion of dobutamine (5 mcg/kg/min fixed-dose) or placebo in 20 septic shock patients with cardiac index ≥2.5 l/min/m2 and hyperlactatemia. Primary outcome was sublingual perfused microvascular density.
Results
Despite an increasing cardiac index, heart rate and left ventricular ejection fraction, dobutamine had no effect on sublingual perfused vessel density [9.0 (7.9–10.1) vs. 9.1 n/mm (7.9–9.9); p = 0.24] or microvascular flow index [2.1 (1.8–2.5) vs. 2.1 (1.9–2.5); p = 0.73] compared to placebo. No differences between dobutamine and placebo were found for the lactate levels, mixed venous-arterial pCO2 gradient, thenar muscle oxygen saturation, capillary refill time or gastric-to-arterial pCO2 gradient. The indocyanine green plasma disappearance rate [14.4 (9.5–25.6) vs. 18.8 %/min (11.7–24.6); p = 0.03] and the recovery slope of thenar muscle oxygen saturation after a vascular occlusion test [2.1 (1.1–3.1) vs. 2.5 %/s (1.2–3.4); p = 0.01] were worse with dobutamine compared to placebo.
Conclusions
Dobutamine failed to improve sublingual microcirculatory, metabolic, hepatosplanchnic or peripheral perfusion parameters despite inducing a significant increase in systemic hemodynamic variables in septic shock patients without low cardiac output but with persistent hypoperfusion.
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Acknowledgments
We thank research nurse Leyla Alegría for her valuable support during the execution of the study. We acknowledge the role of Dr. Luis Villarroel in giving statistical advice for this article. This study was funded by a grant from FONDECYT Chile, Project 1100610.
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The authors declare that they have no conflict of interest.
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ClinicalTrials.gov Identifier: NCT01271153.
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Hernandez, G., Bruhn, A., Luengo, C. et al. Effects of dobutamine on systemic, regional and microcirculatory perfusion parameters in septic shock: a randomized, placebo-controlled, double-blind, crossover study. Intensive Care Med 39, 1435–1443 (2013). https://doi.org/10.1007/s00134-013-2982-0
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DOI: https://doi.org/10.1007/s00134-013-2982-0