• Niklas Sterner, Jane Fisher, Louise Thelaus, Carolin Ketteler, Špela Lemež, Alain Dardashti, Johan Nilsson, Adam Linder, and Igor Zindovic.
• Department of Cardiothoracic Surgery, Clinical Sciences, Lund University, Skåne University Hospital, Lund, Sweden.
• J. Cardiothorac. Vasc. Anesth. 2021 Sep 1; 35 (9): 2640-2650.

ObjectivesTo explore the preoperative, intraoperative, and postoperative dynamics of heparin-binding protein (HBP) in cardiothoracic surgery.DesignThis was a prospective, observational study.SettingThe study was conducted at a single university hospital.ParticipantsThirty patients undergoing cardiac surgery with cardiopulmonary bypass (CPB) were included, 15 of whom underwent coronary artery bypass grafting surgery and 15 of whom underwent complex procedures. Ten patients undergoing lung surgery also were included as a conventional surgery reference group.InterventionsNo interventions were performed.Measurements And Main ResultsHBP was measured at nine different perioperative times. HBP levels increased immediately after heparin administration, further increased during CPB, but decreased rapidly after protamine administration. At arrival to the intensive care unit, median HBP levels were 24.8 (15.6-38.1) ng/mL for coronary artery bypass grafting patients and 51.2 (34.0-117.7) ng/mL for complex surgery patients (p = 0.011). One day after surgery, HBP levels in all three groups were below the proposed cutoff of 30 ng/mL, which previously was found to predict development of organ dysfunction in patients with infection.ConclusionsHBP levels are elevated by the administration of heparin and the use of CPB but reduced by protamine administration. At postoperative day one, HBP levels were less than the threshold for organ dysfunction in patients with infection. The usefulness of HBP for predicting postoperative infections in cardiothoracic surgery should be investigated in future studies.Copyright © 2020 Elsevier Inc. All rights reserved.

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