Antiinflammatory Effect of Heparin‐Coated Circuits with Leukocyte‐Depleting Filters in Coronary Bypass Surgery

Abstract

Abstract: Cardiac surgery with cardiopulmonary bypass is associated with a systemic inflammatory response. We examined combined use of heparin coating of the cardiopulmonary bypass circuit and a leukocyte‐depleting arterial line filter to reduce this response. Thirty patients were allocated randomly to equal groups with a conventional circuit and arterial line filter (C group), a heparin‐coated circuit with a conventional filter (H group), or a heparin‐coated circuit with a leukocyte‐depleting arterial line filter (HF group). Cytokines and respiratory function were repeatedly measured perioperatively. Plasma interleukin (IL)‐6 concentrations in the HF group were lower than in the C group immediately following bypass and operation, at 4 h, and 12 h (p < 0.05). Plasma IL‐8 was lower in the HF group than in the C group at 4 h (p < 0.05). The respiratory index was lower immediately after bypass in the HF group than the C group (0.61 ± 0.2 versus 1.05 ± 0.4, p < 0.05). Heparin‐coated circuits with leukocyte‐depleting filters decrease inflammatory responses and improve pulmonary function during operation.