Since we only need one kidney to live, the donor can be a living relative who has the same blood type and corresponds physically to the patient, as well of course as having two healthy kidneys. Thus there is a relatively good supply of kidneys compared to other organs.
因為人只要一枚腎臟即可生存，所以患者親屬若與病患血型相同、體質相合，且兩側腎臟正常即可捐贈一枚，比起其他器官，腎臟來源已算較充足。