A liver transplant is a surgical procedure performed to replace a diseased liver with a healthy liver from another person. The liver may come from a deceased organ donor or from a living donor. Family members or individuals who are unrelated but make a good match may be able to donate a portion of their liver. This type of transplant is called a living transplant. Individuals who donate a portion of their liver can live healthy lives with the remaining liver.
An entire liver may be transplanted, or just a section. Because the liver is the only organ in the body able to regenerate, a transplanted portion of a liver can rebuild to normal capacity within weeks.
A liver transplant is recommended for individuals who have serious liver dysfunction and will not be able to live without having the liver replaced. The most common liver disease for which transplants are done is cirrhosis. Other diseases may include the following:
Visit the United Network for Organ Sharing (UNOS) website (http://www.unos.org/) for statistics of patients awaiting a liver transplant, and the number of patients who underwent a transplant this year.
The majority of livers that are transplanted come from organ donors who have died. These organ donors are adults or children who have become critically ill (often due to an accidental injury) and have died as a result of their illness. If the donor is an adult, he or she may have agreed to be an organ donor before becoming ill. Parents or spouses can also agree to donate a relative's organs. Donors can come from any part of the U.S. This type of transplant is called a cadaveric transplant.
An individual receiving a transplant may either get a whole liver, or a segment of one. If an adult liver is available and is an appropriate match for two individuals on the waiting list, the donor liver can be divided into two segments and each part is transplanted. This is more often done in children than adults.
Living family members may also be able to donate a section of their liver. This type of transplant is called a living-related transplant. Individuals receiving a partial liver seem to do as well as those receiving a whole liver. Relatives who donate a portion of their liver can live healthy lives with the segment that remains.
UNOS is responsible for transplant organ distribution in the U.S. UNOS oversees the allocation of many different types of transplants, including liver, kidney, pancreas, heart, lung, and cornea.
UNOS receives data from hospitals and medical centers throughout the country regarding adults and children who need organ transplants. The medical team is responsible for sending the data to UNOS, and updating it as your condition changes.
Criteria have been developed to ensure that all people on the waiting list are judged fairly as to the severity of their illness and the urgency of receiving a transplant. Once UNOS receives the data from local hospitals, people waiting for a transplant are placed on a waiting list and given a "status" code. The people in most urgent need of a transplant are placed highest on the status list and are given first priority when a donor liver becomes available.
When a donor organ becomes available, a computer searches all the people on the waiting list for a liver and sets aside those who are not good matches for the available liver. A new list is made from the remaining candidates. The person at the top of the specialized list is considered for the transplant. If he or she is not a good candidate, for whatever reason, the next person is considered, and so forth. Sometimes, people lower on the list might be considered before a person at the top because of the size of the donor organ or the geographic distance between the donor and the recipient.
Extensive testing must be done before an individual can be placed on the transplant list. Testing includes:
Other blood tests will help improve the chances that the donor organ will not be rejected. They may include:
Diagnostic tests may include any of the tests that have been done to evaluate the extent of the disease, including the following:
There is no definite answer to this question. Sometimes, individuals wait only a few days or weeks before receiving a donor organ. If no living-related donor is available, it may take months or years on the waiting list before a suitable donor organ is available. Unfortunately, some people die before an acceptable donor organ can be found.
Each transplant team has its own specific guidelines regarding waiting on the transplant list and being notified when a donor organ is available. In most instances, you will be notified by phone or pager that an organ is available. You will be told to come to the hospital immediately so you can be prepared for the transplant.
Rejection is a normal reaction of the body to a foreign object. When a new liver is placed in a person's body, the body sees the transplanted organ as a threat and tries to attack it. The immune system makes antibodies to try to kill the new organ, not realizing that the transplanted liver is beneficial. To allow the organ to successfully live in a new body, medications must be given to trick the immune system into accepting the transplant.
Medications must be given for the rest of the individual's life to fight rejection and each transplant team has preferences for different medications. The anti-rejection medications most commonly used include:
The doses of these medications may change frequently, depending on your response. Because anti-rejection medications affect the immune system, individuals who receive a transplant are at higher risk for infections. A balance must be maintained between preventing rejection and making you very susceptible to infection. Blood tests to measure the amount of medication in the body are done periodically to make sure you do not get too much or too little of the medications. White blood cells are also an important indicator of how much medication you may need.
This risk of infection is especially great in the first few months after transplant because higher doses of anti-rejection medications are given during this time. You will most likely need to take medications to prevent other infections from occurring. Some of the infections you will be especially susceptible to include oral yeast infection (thrush), herpes, and respiratory viruses.
The following are the most common symptoms of rejection. However, each individual may experience symptoms differently. Symptoms may include:
The symptoms of rejection may resemble other medical conditions or problems. Consult your transplant team with any concerns you may have.
Living with a transplant is a lifelong process. Medications must be taken for the rest of your life to fight rejection. Other medications must also be taken to prevent side effects of the anti-rejection medications, such as infection. Frequent visits and contact with the transplant team are essential.
There is no good answer as to how long an individual can be expected to live after a liver transplant. Each person and every transplant is different. Results improve continually as doctors and scientists learn more about how the body deals with transplanted organs and search for ways to improve the success of transplantation.
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