Learn About How Machine Perfusion Works in Organ Transplantation
Machine perfusion systems use pumps, tubing, oxygenation equipment when required, and monitoring devices to circulate preservation fluids through the organ's blood vessels. The specific method depends on the organ being preserved and the clinical objective. Some systems operate at hypothermic temperatures, while others use normothermic conditions that more closely resemble physiological temperatures.
During perfusion, healthcare professionals monitor selected parameters to understand how the organ responds to the preservation process. These measurements vary according to the organ and the equipment being used.
Key features of machine perfusion include:
- Controlled circulation of preservation solutions through organ blood vessels.
- Monitoring of perfusion pressure, flow, and temperature.
- Potential assessment of organ function using organ-specific indicators.
- Support for preservation periods and transplantation planning in selected circumstances.
Machine perfusion does not guarantee that an organ is suitable for transplantation. Clinical teams must consider donor history, organ condition, test results, and the overall risks associated with transplantation.
Read About Types and Clinical Applications of Machine Perfusion
Machine perfusion approaches differ according to temperature, circulation method, and the organ being preserved. Hypothermic machine perfusion generally uses low temperatures to reduce metabolic activity. Normothermic machine perfusion uses warmer conditions and may provide opportunities to assess certain aspects of organ function before transplantation.
The technique has been studied and implemented across several transplantation fields.
Kidney Transplantation
Hypothermic machine perfusion is used for selected donor kidneys and may help improve preservation compared with static cold storage in certain settings. Research has examined its effects on delayed graft function, particularly among kidneys from donors with increased risk factors.
Liver Transplantation
Normothermic and hypothermic perfusion systems are used in selected liver transplantation settings. Perfusion may help teams evaluate certain liver function indicators and assess organs that require additional consideration before transplantation.
Heart and Lung Transplantation
Machine perfusion technologies are also being developed and used for heart and lung preservation. Some systems aim to maintain organs in more physiologically supportive conditions, while others focus on extending preservation options and supporting organ assessment.
Important considerations include:
- Equipment availability and technical requirements.
- Clinical expertise needed to operate perfusion systems.
- Organ-specific preservation protocols.
- Potential complications and the need for careful monitoring.
- Cost, logistics, and integration into transplant workflows.
Machine perfusion continues to be evaluated through clinical research and transplantation programs. Its suitability depends on the organ, donor circumstances, available technology, and established medical protocols.