Perioperative trajectory of plasma viscosity: A prospective, observational, exploratory study in cardiac surgery

• Published in: Microcirculation (New York, N.Y. 1994) N.Y. 1994), 2022-07, Vol.29 (4-5), p.e12777-n/a
• Main Authors: Valeanu, Liana, Andrei, Stefan, Ginghina, Carmen, Robu, Cornel, Ciurciun, Adrian, Balan, Cosmin, Stefan, Mihai, Stoian, Anca, Stanculea, Iulia, Cheta, Andreea, Dima, Laura, Stiru, Ovidiu, Filipescu, Daniela, Bubenek‐Turconi, Serban‐Ion, Longrois, Dan
• Format: Article
• Language: English
• Subjects: cardiac surgery; Heart surgery; Hemoglobin; perioperative; Plasma; plasma viscosity; Proteins; Viscosity
• ISSN: 1073-9688; 1549-8719
• DOI: 10.1111/micc.12777

Objective Plasma viscosity is one of the critical factors that regulate microcirculatory flow but has received scant research attention. The main objective of this study was to evaluate plasma viscosity in cardiac surgery with respect to perioperative trajectory, main determinants, and impact on outcome. Methods Prospective, single center, observational study, including 50 adult patients undergoing cardiac surgery with cardiopulmonary bypass between February 1, 2020 and May 31, 2021. Clinical perioperative characteristics, short term outcome, standard blood analysis, plasma viscosity, total proteins, and fibrinogen concentrations were recorded at 10 distinct time points during the first perioperative week. Results The longitudinal analysis showed that plasma viscosity is strongly influenced by proteins and measurement time points. Plasma viscosity showed a coefficient of variation of 11.3 ± 1.08 for EDTA and 12.1 ± 2.1 for citrate, similarly to total proteins and hemoglobin, but significantly lower than fibrinogen (p