Effects of Different Fluid Transfusion Regimens On Glycocalyx In Patients Undergoing Thoracic Surgery.

Introduction: Endothelial Glycocalyx (EG) composing of proteoglycans heparan sulfate (HS), syndecan, and plasma proteins forms a physiologically active surface layer on the vascular endothelium, regulates oncotic pressure. We aimed to compare the effects of two different fluid transfusion regimens on EG. Materials and Methods: 41 patients with ASA I-III physical status were included in this prospective, randomized controlled study. We collected blood samples before anesthesia induction and after surgery to measure hemoglobin-hematocrit levels and biochemical parameters. Hemodynamic parameters were recorded every 15 minutes perioperatively. We divided the patients into two groups: Group R received 3 ml/kg/h, and Group L received 8 ml/kg/h of Ringer's lactate infusion. To assess endothelial damage, HS and syndecan levels, blood samples were taken after anesthesia induction(T1), after pneumonectomy or lobectomy(T2), and at the end of surgery(T3).