Perfusion technology is a specialized field and methodological approach concerned with the artificial circulation of fluids, typically blood or perfusates, through organs, tissues, or the entire body. It investigates the principles, systems, and protocols required to maintain physiological function, viability, or deliver substances under controlled conditions outside the normal biological circulation. Key characteristics include the design, operation, and optimization of perfusion devices (such as oxygenators, pumps, and heat exchangers) and perfusate compositions, while its significance lies in enabling complex medical interventions like cardiac surgery and organ transplantation, as well as facilitating advanced research into tissue metabolism and function.