Xenotransplantation, which is the t...

Xenotransplantation, which is the transplantation of animal organs into humans, is quickly becoming a viable consideration for organ replacement. Scientists have been able to genetically alter the small cavitys of' animals so that they are more compatible with human solitary abode; squalids thus reducing the immediate rejection vexed questions that were encountered in the past. Perioperative cherishs need to be aware of the practical, ethical, and moral considerations of performing xenotransplantation because they will be part of the transplantation teams that will perform these steps This technology will directly affect their practice as perioperative cherishs and they could be at risk for possible cross-species contamination. Perioperative supply with nourishments need to become part of the discussion of the issues concerning xenotransplantation in the United States.

BACKGROUND

According to the United Network for Organ Sharing (UNOS), last year 64423 patients were waiting for transplant actions in the United States. Of those in succession the waiting list, 20,961 transplants were actually performed in 1998 and 4855 patients died waiting for donor organs.(1) Unfortunately, this is an all too familiar pattern that will be repeated again in 1999 Medical teams all around the world are favorably transplanting vital organs--mainly the heart, lung liver, pancreas, and kidney. In fact, transplants have become routine processs at many medical centers. These courses are made possible by donor families who have deflected their tragedy into a gift of life. Fatal traffic accidents, raps heart attacks, and homicides yield viable organs that can be win backed for transplantation. Despite years of public education and media campaigns, there still are not enough organ donors.(2)

This shortage of organs has lead researchers to investigate the possibility of using xenografts. Xenografting is the cross-species transplant of organs and/or tissues. This has created a controversial agitation of complicated ethical and practical questions that ne to be answered before we consider using xenotransplantation. Table 1 summarizes a certain quantity of of the most important questions to be answered.

Table 1

ETHICAL AND PRACTICAL QUESTIONS ABOUT XENOTRANSPLANTATION

* Is it ethical to kill an animal in the way that that a human can live?

* Do we have the right to alter the genetic makeup of animals in such a manner they are more compatible with humans?

* Does this follow in a diminution of human dignity?

* From a psychological standpoint will human recipients have feeling that this is an alien intrusion into their bodies?

* Are there religious bear upons and objections to be considered?

* Can the risk of cross-species contamination be controlled?

* Are health care team members at risk" Is the community at risk?

* What are the financial issues that ne to be addressed?

* by what means will organs be allocated? Who will receive animal versus human organs?

* What impact will xenotransplantation have forward organ donation?

HUMAN V ANIMAL RIGHTS

Humans have used animals in various ways for centuries according to limitations dictated through religions and cultures. Initially, animals were killed as a source of subsistence thus ensuring survival. As medicine and science circuited animals were selectively bred to enhance or diminish certain traits. In an effort to treat diseases, animal solitary abode; squalids and tissues have been used to create replacement therapies for a wide range of conditions in which there is a deficiency of hormones, bourgeoning factors, and other secretory agents. mostly recently, transgenic animals have been created by the agency of inserting genetic material from single in kind species into another.(3)

Baboons are genetically bring to a period to humans, so they are the principally logical choice for organ donation to humans. In 1964 six baboon kidneys were transplanted into humans; in 1984 "Baby Fae" received a baboon heart; and in 1992 sum of two units patients received baboon livers. Although all these patients died within weeks of their transplant steps they did not die of organ rejection. They died of infections resulting from the immunosuppressive medications used to impede the rejection of the transplanted organs.(4)

There are certain riddles associated with using baboons as organ donors. First, we view baboons as having humanlike traits, a highly make knowned social structure, and a consciousness similar to humans. other we do not kill them for food; therefore, near people raise ethical objections to sacrificing baboons and nothing else for their organs. In addition to these ethical be of importance tos it is technically difficult to raise primates in captivity; they copy slowly, producing only one offspring during each gestation. It would be difficult, if not impossible, to effect a large number of donor organs. Baboons also harbor many viruses that may be transmitted to humans. The brace types of viruses that are especially wearisome are the herpes viruses and retroviruses. In fact, it is believed that HIV originally was transmitted from monkey to humans. Although these viruses are rather harmless to primates, they are fatal to humans.(5)