Optimized Extracorporeal Perfusion Strategy: A New Concept

Early heart-lung machines were mechanically simple, with rudimentary monitoring capabilities, and caused pronounced physiological disturbances due to large priming volumes and uncoated circuits, factors that contributed substantially to perioperative morbidity. Over the ensuing decades, technological progress has transformed heart-lung machine from basic, manually controlled hardware into highly configurable, modular platforms. The introduction of centrifugal and advanced roller pumps, oxygenators with optimized gas exchange efficiency, and sophisticated heat exchangers has improved both physiological stability and procedural safety. Modern heart-lung machines incorporate biocompatible surface coatings that attenuate activation of coagulation and inflammatory pathways. Priming volumes have been markedly reduced, and tubing systems have been refined to minimize blood-air contact and shear stress. Safety features, including bubble detectors, level sensors, and automated emergency protocols, are now standard. Contemporary heart-lung machine platforms enable comprehensive real-time monitoring of flows, pressures, oxygenation, and temperature, and modular circuit design permits tailoring to specific surgical requirements, supporting both conventional and minimal extracorporeal circulation approaches in line with the breadth of modern cardiac surgical procedures.