You are a biotech entrepreneur focused on transplant medicine. Design a startup concept called 'OrganSave' that develops technology to extend the viability of donor organs for transplantation. The concept must include: 1) Market opportunity: organ shortage, transplant waiting lists, 2) Problem statement: organs have limited viability outside the body, 3) Solution overview: portable perfusion device that preserves organs longer and monitors viability, 4) Technology: hypothermic or normothermic perfusion, oxygenation, nutrient delivery, 5) Features: real-time organ assessment, viability biomarkers, transportation logistics, 6) Target customers: organ procurement organizations, transplant centers, 7) Business model: device sales, disposable cartridges, service contracts, 8) Regulatory: FDA Class III medical device, clinical trials, 9) Partnerships: transplant centers, organ procurement organizations, research institutions, 10) Go-to-market: transplant conferences, direct sales to hospitals.