• Journal of critical care · Dec 2015

    Clinical Trial

    Effects of ketanserin on microcirculatory alterations in septic shock: An open-label pilot study.

    • Namkje A R Vellinga, Gerke Veenstra, Claudia Scorcella, Matty Koopmans, Eric N van Roon, Can Ince, and E Christiaan Boerma.
    • Department of Intensive Care, Medical Center Leeuwarden, Leeuwarden, the Netherlands; Department of Translational Physiology, Academic Medical Center, Amsterdam, the Netherlands.
    • J Crit Care. 2015 Dec 1; 30 (6): 1156-62.

    IntroductionMicrocirculatory alterations in sepsis are associated with increased morbidity and mortality. These alterations occur despite macrohemodynamic resuscitation. Alternative pro-microcirculatory strategies, including vasodilatory drugs, have been suggested to improve capillary blood flow. Ketanserin, a serotonin receptor antagonist, is an attractive candidate because of its vasodilatory, antithrombotic, and anti-inflammatory effects.MethodsThis is an open-label pilot study on the effect of ketanserin administration on microcirculatory alterations in septic shock, defined as microvascular flow index (MFI)≤2.5 after a strict macrohemodynamic resuscitation protocol. Sidestream dark-field imaging was applied to assess the microcirculation. A stepwise incremental dose regiment was applied until an MFI>2.9, the primary end point, was reached.ResultsTen patients (Acute Physiology and Chronic Health Evaluation IV scores of 115 [100-136]) were included. Baseline MFI was 1.71 (1.31-2.32) and was significantly increasing to 2.96 (2.54-3.00; P=.021) during the ketanserin infusion. The total ketanserin dose was 0.09 (0.08-0.13) mg/kg per patient in 60 (30-60) minutes. In 3 patients (30%), the ketanserin infusion was discontinued due to refractory hypotension.ConclusionAn improvement in microcirculatory perfusion was observed during ketanserin administration in patients with septic shock after macrohemodynamic resuscitation. This finding needs further exploration in a placebo-controlled setting.Copyright © 2015 The Authors. Published by Elsevier Inc. All rights reserved.

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