Remote Ischemic Preconditioning on Pulmonary Injury in Cardic Surgery

During cardiac surgery with cardiopulmonary bypass , pulmonary dysfunction remains to be a problem complicating the postoperative course of the patients.Remote ischemic preconditioning(RIPC) with transient upper limb ischemia/reperfusion is a novel, simple, cost-free,non-pharmacological and non-invasive strategy.Recent several trials suggested that RIPC could provide pulmonary protection by reducing serum biomarkers,however,whether the RIPC can improve the clinical outcomes in patients undergoing on-pump cardiac surgery,is still uncertain. The study hypothesis is: remote ischemic preconditioning will provide lung-protective effect and improve clinical outcomes in patients undergoing cardic surgery.