Kidney Transplant

A kidney transplant is a surgical procedure that replaces a diseased or failing kidney with a healthy kidney from a donor. This treatment is for people with end-stage kidney disease (ESKD), a condition where kidneys can no longer filter waste from the blood. A successful transplant can improve health and quality of life, often allowing individuals to live longer without dialysis.

What is Kidney Transplant?

A kidney transplant is a surgical operation to place a healthy kidney from a donor into your body, replacing your own kidneys that are no longer working properly. This procedure is a treatment option for end-stage kidney disease (ESKD), a severe condition where your kidneys have failed and can no longer clean your blood effectively. The new kidney takes over the vital job of filtering waste and excess fluid.

Your kidneys are two bean-shaped organs that filter waste products and excess water from your blood, producing urine. When your kidneys fail, these waste products build up, which can be life-threatening. End-stage kidney disease (ESKD) means your kidneys have lost nearly all their ability to function. A kidney transplant is one treatment for ESKD. The healthy kidney can come from a deceased donor, someone who has recently died, or a living donor, such as a family member or friend. The surgeon places the new kidney in your lower abdomen and connects it to your blood vessels and bladder. Your own diseased kidneys are usually left in place unless they cause problems.

Why it's done

A kidney transplant is primarily done to treat end-stage kidney disease (ESKD), a condition where your kidneys have failed and can no longer perform their essential functions. This procedure can free you from the need for regular dialysis treatments, which filter your blood artificially. A successful transplant can significantly improve your quality of life, increase your energy levels, and extend your life expectancy.

Kidney failure can be caused by various conditions, including high blood pressure (hypertension), diabetes, polycystic kidney disease, and glomerulonephritis, an inflammation of the kidney's filtering units. When kidney failure reaches its final stage, ESKD, your body cannot remove waste and excess fluid on its own. Without a transplant, people with ESKD need dialysis to survive. Dialysis is a treatment that uses a machine to filter your blood, usually several times a week. While dialysis is life-sustaining, it can be time-consuming and may limit your daily activities. A kidney transplant offers the chance for a more normal life, often with fewer dietary restrictions and more freedom.

How to prepare

Preparing for a kidney transplant involves a thorough medical evaluation to ensure you are healthy enough for surgery and to identify any potential risks. This process includes extensive tests, consultations with a transplant team, and often psychological assessments. If approved, you will be placed on a waiting list for a deceased donor kidney or begin planning with a living donor.

The transplant evaluation is a comprehensive process. Doctors will check your heart, lungs, and other organs to make sure they can withstand the surgery and the powerful medications needed afterward. Blood tests will determine your blood type and tissue type, which are crucial for finding a compatible donor and reducing the risk of your body rejecting the new kidney. You will meet with various specialists, including a transplant surgeon, nephrologist (kidney doctor), social worker, and dietitian. They will discuss the procedure, potential risks, and the lifelong commitment to taking anti-rejection medications. If you are considered a good candidate, you will be added to the national waiting list for a deceased donor kidney, which can take several years. If a living donor is an option, they will undergo a similar, rigorous evaluation to ensure their health and compatibility.

What happens during

During a kidney transplant, you will receive general anesthesia to ensure you are asleep and pain-free throughout the surgery. The surgeon makes an incision in your lower abdomen and places the new, healthy kidney into your body. They then connect the new kidney's blood vessels to your own and attach its ureter (the tube that carries urine) to your bladder. Your original kidneys are usually left in place.

The transplant surgery typically takes about two to four hours. Once the new kidney is in place, the surgical team carefully connects the renal artery and renal vein of the donor kidney to your own iliac artery and vein, which are large blood vessels in your pelvis. This allows blood to flow through the new kidney. Next, the donor kidney's ureter is connected to your bladder. This allows urine produced by the new kidney to drain out of your body. Sometimes, the new kidney may start making urine immediately after the blood flow is restored. After all connections are secure, the incision is closed with stitches or staples.

Recovery & timeline

After a kidney transplant, you will typically stay in the hospital for several days to a week for close monitoring. The initial recovery period involves managing pain, monitoring kidney function, and learning about your new medications. Full recovery and adjustment to your new lifestyle, including lifelong anti-rejection medications, can take several months.

Immediately after surgery, you will be moved to a recovery room or intensive care unit. Nurses and doctors will closely monitor your new kidney's function, your vital signs, and any signs of complications. You will likely have a catheter to drain urine and possibly other tubes to drain fluid from the surgical site. Once discharged, you will need frequent follow-up appointments to check your kidney function and adjust your medication doses. It's crucial to take your anti-rejection medications exactly as prescribed for the rest of your life to prevent your body from rejecting the new kidney. You will also receive guidance on diet, exercise, and avoiding infections. Most people can return to normal activities, including work or school, within a few weeks to a few months, depending on their individual recovery.

Risks & side effects

Like any major surgery, kidney transplant carries risks, including bleeding, infection, and blood clots. A primary concern is organ rejection, where your immune system attacks the new kidney, though medications help prevent this. Long-term side effects often relate to anti-rejection medications, such as increased risk of infection, high blood pressure, diabetes, and certain cancers.

Surgical risks include those common to any major operation, such as bleeding, infection at the surgical site, and damage to surrounding organs. Blood clots can also form, which may require additional treatment. Your medical team will take precautions to minimize these risks. The most significant long-term risk is rejection of the new kidney. Your immune system naturally sees the new kidney as foreign and tries to attack it. Anti-rejection (immunosuppressant) medications are essential to prevent this, but they also weaken your immune system, making you more vulnerable to infections like urinary tract infections, pneumonia, and the flu. These medications can also cause other side effects, including high blood pressure (hypertension), high cholesterol, diabetes, bone thinning (osteoporosis), and an increased risk of certain types of cancer, such as skin cancer and lymphoma. Regular monitoring and lifestyle adjustments are vital to manage these potential issues.

Success rate

Kidney transplant generally has a high success rate, significantly improving life expectancy and quality of life for many people with end-stage kidney disease. For kidneys from deceased donors, about 90% of transplanted kidneys are still working one year after surgery, and about 75% are working after five years. Living donor kidneys often have even better outcomes, with about 95% working after one year and 80% after five years.

The success of a kidney transplant depends on several factors, including the donor type (living or deceased), your overall health, and how well you follow your post-transplant care plan, especially taking anti-rejection medications. Advances in surgical techniques and immunosuppressant drugs have greatly improved outcomes over the years. While these statistics show high success rates, it's important to remember that a transplanted kidney may not last forever. Some people may need another transplant later in life. Regular follow-up with your transplant team, adherence to medication schedules, and a healthy lifestyle are crucial for maintaining the health of your new kidney and maximizing its lifespan.

Frequently asked questions

How long does a transplanted kidney usually last?

The lifespan of a transplanted kidney varies, but generally, kidneys from deceased donors last about 10-15 years, and kidneys from living donors can last 15-20 years or even longer. Many factors, including your overall health and how well you take your anti-rejection medications, influence how long the kidney functions.

Can I live a normal life after a kidney transplant?

Many people can return to a more normal and active life after a successful kidney transplant. You may have more energy, fewer dietary restrictions than on dialysis, and improved overall health. However, you will need lifelong follow-up care and daily anti-rejection medications.

What are immunosuppressant medications?

Immunosuppressant medications are drugs you must take every day for the rest of your life after a kidney transplant. They work by weakening your immune system to prevent it from recognizing and attacking your new kidney as a foreign object. These medications are crucial to prevent organ rejection.

Will I have dietary restrictions after a kidney transplant?

While you may have fewer dietary restrictions than when on dialysis, you will still need to follow a healthy diet. Your transplant team will provide specific guidance, which often includes limiting salt, sugar, and certain fats, and ensuring adequate protein intake. You may also need to avoid grapefruit and pomegranate due to interactions with anti-rejection medications.

How long is the waiting list for a deceased donor kidney?

The waiting list for a deceased donor kidney can be long, often several years, depending on your blood type, tissue type, and geographic location. The time on the waiting list can vary greatly, and there is no guarantee of how long it will take to find a suitable donor.

Can I get a kidney transplant if I have other health conditions?

Your transplant team will conduct a thorough evaluation to determine if you are a suitable candidate for a kidney transplant. Certain severe health conditions, such as active cancer, severe heart disease, or uncontrolled infections, might prevent you from being eligible. The goal is to ensure the transplant will be successful and improve your overall health.

Sources

• MedlinePlus — Kidney Transplant
• Mayo Clinic — Kidney Transplant
• Cochrane Library — Kidney Transplant