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Organ transplantation may be a procedure during which an organ is far away from one body and placed within the body of a recipient, to exchange a damaged or missing organ. The donor and recipient could also be at an equivalent location, or organs could also be transported from a donor site to a different location. Organs and/or tissues that are transplanted within an equivalent person's body are called auto grafts. Transplants that are recently performed between two subjects of an equivalent species are called allografts. Allografts can either be from a living or cadaveric source.

Organs that are successfully transplanted include the guts, kidneys, liver, lungs, pancreas, intestine, thymus and uterus. Tissues include bones, tendons (both mentioned as musculoskeletal grafts), corneae, skin, heart valves, nerves and veins. Worldwide, the kidneys are the foremost commonly transplanted organs, followed by the liver then the guts. Corneae and musculoskeletal grafts are the foremost commonly transplanted tissues; these outnumber organ transplants by quite tenfold.

Organ donors could also be living, dead, or dead via circulatory death. Tissue could also be recovered from donors who die of circulatory death, also as of cerebral death – up to 24 hours past the cessation of heartbeat. Unlike organs, most tissues (with the exception of corneas) are often preserved and stored for up to 5 years, meaning they will be "banked". Transplantation raises variety of bioethical issues, including the definition of death, when and the way consent should tend for an organ to be transplanted, and payment for organs for transplantation. Other ethical issues include transplantation tourism (medical tourism) and more broadly the socio-economic context during which organ procurement or transplantation may occur. a specific problem is organ trafficking. There’s also the moral issue of not holding out false hope to patients.

Transplantation medicine is one among the foremost challenging and sophisticated areas of recent medicine. a number of the key areas for medical management are the issues of transplant rejection, during which the body has an immune reaction to the transplanted organ, possibly resulting in transplant failure and therefore the got to immediately remove the organ from the recipient. When possible, transplant rejection is often reduced through serotyping to work out the foremost appropriate donor-recipient match and thru the utilization of immunosuppressant drugs.

In most countries there's a shortage of suitable organs for transplantation. Countries often have formal systems in situ to manage the method of determining who is an donor and in what order organ recipients receive available organs.

The overwhelming majority of deceased-donor organs within the us are allocated by federal contract to the Organ Procurement and Transplantation Network (OPTN), held since it had been created by the transplant Act of 1984 by the United Network for Organ Sharing or UNOS. (UNOS doesn't handle donor cornea tissue; corneal donor tissue is typically handled by various eye banks.) Individual regional organ procurement organizations (OPOs), all members of the OPTN, are liable for the identification of suitable donors and collection of the donated organs. UNOS then allocates organs supported the tactic considered most fair by the scientific leadership within the field. The allocation methodology varies somewhat by organ, and changes periodically. for instance , liver allocation is predicated partially on MELD score (Model of End-Stage Liver Disease), an empirical score supported lab values indicative of the sickness of the person from disease . In 1984, the National transplant Act (NOTA) was passed which gave thanks to the Organ Procurement and Transplantation Network that maintains the organ registry and ensures equitable allocation of organs. The Scientific Registry of Transplant Recipients was also established to conduct ongoing studies into the evaluation and clinical status of organ transplants. In 2000 the Children's Health Act passed and required NOTA to think about special issues around pediatric patients and organ allocation (Services).

Ethical concerns

The existence and distribution of organ transplantation procedures in developing countries, while nearly always beneficial to those receiving them, raise many ethical concerns. Both the source and method of obtaining the organ to transplant are major ethical issues to think about , also because the notion of distributive justice. The planet Health Organization argues that transplantations promote health, but the notion of "transplantation tourism" has the potential to violate human rights or exploit the poor, to possess unintended health consequences, and to supply unequal access to services, all of which ultimately may cause harm. No matter the "gift of life", within the context of developing countries, this could be coercive. The practice of coercion might be considered exploitative of the poor population, violating basic human rights consistent with Articles 3 and 4 of the Universal Declaration of Human Rights. there's also a strong opposing view, that trade organs, if properly and effectively regulated to make sure that the vendor is fully informed of all the results of donation, may be a interdependent transaction between two consenting adults, which prohibiting it might itself be a violation of Articles 3 and 29 of the Universal Declaration of Human Rights.

Even within developed countries there's concern that enthusiasm for increasing the availability of organs may trample on respect for the proper to life. The question is formed even more complicated by the very fact that the "irreversibility" criterion for legal death can't be adequately defined and may easily change with changing technology.