Effects of Vasopressors on Immune Response

Noradrenaline is an endogenous catecholamine with sympathomimetic effects. It has mainly α-adrenergic receptor selectivity but also β-effects in higher concentrations. It will be administered at 0.05 μg/kg/min, a clinical relevant dose on the low end of the scale.

Phenylephrine is a selective α-adrenergic receptor agonist. It will be administered at 0.5 μg/kg/min, based on its relative vasopressor potency in comparison with noradrenaline.

Vasopressin is 8-arginine-vasopressin, a synthetic analogue of endogenous nonapeptide hormone. It exerts its action via V1 receptors (ubiquitous vasoconstriction) and V2 receptors (renal water resorption). It will be administered at 0.04 IU/min, a clinically relevant dose.

NaCl 0.9% infusion