Machine perfusion of solid organs such as kidneys, livers, hearts and lungs, aims to ameliorate ischemia related organ damage. It involves circulating a preservation solution through the organ to provide oxygen, nutrients, and remove waste products, simulating normal blood flow. There are two main types: hypothermic machine perfusion (HMP), which cools the organ to slow metabolic processes, and normothermic machine perfusion (NMP), which maintains the organ at around normal body temperature, allowing more active metabolic function and potentially better assessment of organ viability. This session aims to discuss currently used machine perfusion concepts in general and specifically in the context of joint organ retrieval.