Liver Preservation Assessment

A combination of stable perfusion, ongoing lactate metabolism, bile production, and limited tissue injury markers can support a favorable viability assessment. These findings are more informative when considered together than when viewed in isolation, because each reflects a different aspect of graft function or preservation-related stress. Clinicians can use the combined pattern to support decisions about implantation.

Lactate metabolism and bile production provide functional evidence rather than relying only on the liver’s appearance. Lactate behavior can indicate how the graft is handling a metabolic challenge, while bile production offers another sign of preserved activity. Monitoring both helps distinguish structural preservation from evidence that the organ retains functions relevant to transplantation.

Visual inspection provides structural information, whereas biochemical measurements examine processes associated with injury or function. Neither perspective fully replaces the other: an organ may appear acceptable while biochemical findings raise concern, or measurable activity may add context to an uncertain appearance. Combining these approaches creates a broader assessment of graft condition before implantation.

Assessment begins with evaluation of the liver’s condition and continues through storage, using the preservation approach being applied. During static cold storage or machine perfusion, clinicians can monitor relevant indicators such as perfusion stability, lactate metabolism, bile production, and tissue injury markers. Findings are then considered before transplantation to judge whether the graft remains appropriate for implantation.

Machine perfusion permits monitoring of perfusion stability and functional indicators while the liver is being preserved, whereas static cold storage is another setting in which assessment can occur without the same described monitoring context. This makes machine perfusion particularly useful for gathering dynamic evidence about graft condition. The resulting information can support evaluation of uncertain or extended-criteria organs.

Its value is especially clear when clinicians consider extended-criteria grafts, because additional evidence can inform whether an organ remains suitable rather than relying only on initial inspection. Standardized assessment also supports safer organ allocation and may reduce unnecessary discard. In research, consistent measurements help evaluate preservation conditions and efforts to expand the transplantable donor pool.