Organ donation in Jewish law
Certain fundamental Jewish law questions arise in issues of organ donation. Donation of an organ from a living person to save another's life, where the donor's health will not appreciably suffer, is permitted and encouraged in Jewish law. Donation of an organ from a dead person is equally permitted for the same purpose: to save a life ("pikuach nefesh"). This simple statement of the issue belies, however, the complexity of defining death in Jewish law. Thus, although there are side issues regarding mutilation of the body etc., the primary issue that prevents organ  donation from the dead amongst Jews, in many cases, is the definition of death, simply because to take a life-sustaining organ from a person who was still alive would be murder. Because in Jewish law, organ donation raises such difficult questions, it has traditionally been met with some skepticism. In both Orthodox Judaism and non-Orthodox Judaism, the majority view holds that organ donation is permitted in the case of irreversible cardiac rhythm cessation. However most organs must be transplanted before the heart has ceased, and this has led to much discussion and assessment of Jewish law so that  today, whilst there continues to be opposition to transplantation before cardiac/respiratory death, there are several authorities which argue that it is allowed, and this is now the official position of the government of the State of Israel and its Chief Rabbinate. Relevant principles of Jewish Law. In judging cases for organ donation, rabbis apply a range of Jewish principles and consider precedents concerning the donor. In Judaism, almost all acts are permissible in order to save the life of another, provided the risk of that person's death is real and immediate (pikuach nefesh) – the only acts not permissible  are blood shedding, forbidden relations, and idolatry. If the donor is living then he may not donate an organ where this will risk his death, even if this is to save the life of another. However, where there will be no appreciable detriment to his health, he may do so, and some even argue he is obligated. If the donor is dead, there is again, in principle, no obstacle to organ donation so long as it is for the purpose of pikuach nefesh, but the reality is that the donor must be dead, otherwise the removal of vital organs would  constitute murder, and the issue is how death is defined. Traditionally Judaism defined death as the absence of a cardiac/respiratory beat, but with advances in modern medicine and the advent of the concept of brain or brain stem death, which may occur whilst the heart and lungs are maintained artificially in a viable state, disagreement has arisen as to when organs may be harvested. The traditional opinion is that it is only after the cessation of cardio-respiratory activity, which renders unviable the potential for transplant of many organs. However the above medical advances have led to much discussion  and assessment of Jewish law so that today, whilst there continues to be opposition to transplantation before cardiac/respiratory death, there are several authorities which argue that it is allowed, and this is now the official position of the government of the State of Israel and its Chief Rabbinate. In any event, there is no agreed consensus, and it is always advised to consult with a rabbi before making a decision. Determination of death. Another major debate around organ donation concerns with the definition of death. Because if the accepted definition if death is "incorrect," removing a heart from a  donor who was established dead under the "wrong" criteria is tantamount to murder. With life-support and cardiopulmonary resuscitative technology, establishing the moment of death becomes more complicated and opinionated. According to some, Jewish law defines death as a state of complete and irreversible cessation of cardiorespiratory function followed by a minimum of 5 minutes' waiting during which it is not restored (period of time depends on custom). After 5 minutes blood flow to organs have ceased, at which time it removal of organs to save a life is permitted according to some rabbinical opinions. Some opinions define death as  solely the irreversible cessation of breathing, and some define death as the irreversible cessation of the heartbeat—which is the majority, long standing accepted opinion. In 1968, a Harvard committee decided on a set of criteria for irreversible coma, or brain stem death. Regarding the point at which a person is considered dead in the case of brain-stem death with a ventilator machine causing heartbeat, a definitive consensus from halachic authorities has not been reached as of today. However increasing numbers of orthodox authorities accept brain stem death with various stringencies, enabling surgeons to take full advantage of modern  medical technology in transplantations of organs from the deceased. Israel, in particular, passed organ donation laws in 2008 with the full support of its Chief Rabbinate, and in other jurisdictions such organisations as the Halachic Organ Donor Society (HODS) encourage and support donation. Other considerations. Apart from the problem of establishing death, there are additional problems in Jewish law that may arise in connection with organ donation. The Jewish religion attaches great importance to the dignity of the dead, and there are explicit laws as to the proper care to be given to the body, ensuring the respect of its  dignity. However these pale beside the main issue of establishing death: Terminally-ill donors. Another issue of organ donation concerning the donor is the prohibition against touching a "goses". A "goses" is a halachic category ascribed to people who are critically ill and expected to die within a brief period, typically three days. Jewish law forbids touching the body of a "goses" for fear that any sudden movement may accelerate the time of death. For this reason, there may be reluctance to medically intervene (preparing patient for organ donation) with an imminently dying patient solely for the purpose of preparing  them for organ donation. Therefore, heart transplants raise a controversial question of when does one determine the patient donor dead to be able to begin the transplant procedure and remove the heart. Types of organ transplants and Jewish law. Artificial organs. Transplants with artificial organs do not pose any problems in Jewish law (with the exception of artificial heart transplants), as long as the prospects for success are greater than the risks. Therefore, there is no conflict with Jewish law against artificial heart valves, bone parts, joints, and use of dialysis. Artificial heart transplants are not permissible according to Jewish  law due to low success rates and the serious medical complications involved. Medical science has not reached the point of being able to use artificial organs or animal organs as protocol for transplantation. Blood and bone marrow. According to Jewish law application, it is permissible to donate blood and bone marrow tissue because there is almost no danger or risk to the donor, and these tissues regenerate quickly. Heart. For successful heart and liver transplants the donor's heart must still be beating. There is the important issue of determining the moment of death to permit heart transplantation. As stated , some rabbis prohibit removal of an organ from a brain-dead patient, making it impossible to perform heart transplants. Other rabbis of the "open orthodox" movement accept the criterion for brain stem death and allow organ transplantation to immediately save a life. Kidney. After kidney donation, the donor lives with one kidney and there is a small risk associated with the surgery. Whether a person is obligated to endanger his own life to any degree to save another person's life who is critically ill is a critical question in Jewish rulings. Therefore, there are some rabbinical opinions that prohibit  kidney donation from live donors. Other rabbis allow it as an act of piety, and others believe it is an obligation not to violate a precept, "Thou shall not stand idly by the blood of thy fellow man." Lungs. The lobe of lung transplantation is not common from living donors because the morbidity and mortality risk to the donor is felt to be excessive. Non-living lung donations are more commonly used. Skin. Many Rabbis who allow organ donation for life-saving organs extend this to allow preserving human skin from cadavers in skin banks for future use for burn  victims. Orthodox opposition. [Haredim in general are vehemently opposed to organ donations postmortem as it violated Jewish burial law, which considers postmortem organ removal as "desecrating a corpse." Many Haredi rabbis also oppose the removal of organs when the person is classified as "brain-dead." While there are some rabbis in the Haredi world that follow the religious leniency the Modern Orthodox community uses, most follow the more traditional interpretation. Haredim in Israel have recently issued an anti-organ-donor or "life" card which is intended to ensure that organs are not removed from the bearer after brain death or  brain stem death. It states: "I do not give my permission to take from me, not in life or in death, any organ or part of my body for any purpose." Nonetheless, Haredi Jews have a high rate of live organ donations. In 2014, 17% of all live kidney donations to strangers in the United States were donated by Haredi Jews, even though they are only 0.2% of the US population; however, only one donation went to a non-Jew. Other studies of other live organ donations in the US and Israel show similarly high donation rates for a variety  of organs. Many Haredi leaders point out that their community is very pro-organ donations, they are only opposed to it under certain circumstances.