perfusat

Perfusat refers to a specialized liquid medium used in medical and biological research to maintain the viability of tissues, organs, or cells outside of a living organism. The term originates from the Latin *perfusare*, meaning "to pour over," reflecting its role in perfusing (delivering fluid to) biological tissues. Perfusat is typically designed to replicate the physiological conditions found within the body, providing essential nutrients, oxygen, and electrolytes while removing metabolic waste.

In organ preservation, perfusat is commonly employed during transplantation procedures to extend the viability of donor organs. It may contain solutions like University of Wisconsin solution (UW) or histidine-tryptophan-ketoglutarate (HTK), which help reduce cellular damage and inflammation. Perfusat can be delivered through a closed-circuit system, allowing continuous monitoring and adjustment of pH, temperature, and oxygen levels.

Beyond transplantation, perfusat is used in ex vivo perfusion techniques, such as machine perfusion for liver or kidney grafts, and in experimental settings like organ-on-a-chip systems. These applications aim to improve tissue function, assess drug responses, or study disease mechanisms under controlled conditions. The composition of perfusat varies depending on the tissue type and experimental goals, often including additives like antioxidants, osmolytes, or buffering agents to stabilize cellular integrity.

While perfusat enhances organ preservation and research capabilities, its use requires careful formulation to avoid complications such as edema, ischemia-reperfusion injury, or immune activation. Advances in perfusat technology continue to refine its efficacy, supporting both clinical and scientific advancements in regenerative medicine and organ transplantation.