Renal failure, also called kidney failure, is a serious condition where the kidneys can no longer filter waste and excess fluid from the blood effectively. Treatment aims to slow disease progression, manage complications, and maintain the best possible quality of life. Depending on the stage and type of kidney failure, options range from medications and lifestyle changes to dialysis and transplantation, with ongoing research exploring new therapeutic approaches.

Understanding Treatment Goals for Kidney Failure

When the kidneys lose their ability to clean the blood properly, treatment becomes essential to keep the body functioning. The main goal of treating renal failure is not always to cure the condition, especially in chronic cases, but to help patients live longer and feel better. Treatment focuses on slowing down the damage to the kidneys, managing symptoms like swelling and fatigue, and preventing serious complications such as heart disease or dangerously high levels of waste products in the blood.^[1]

The choice of treatment depends heavily on whether the kidney failure is acute or chronic, and on the stage of the disease. Acute kidney failure, which develops suddenly over hours or days, may be reversible if treated quickly. Chronic kidney failure, on the other hand, develops slowly over months or years and causes permanent damage that cannot be repaired. For chronic cases, treatment is long-term and involves a combination of medical care, lifestyle changes, and sometimes advanced interventions like dialysis or kidney transplant.^[4][10]

Each patient’s situation is unique. Factors such as age, overall health, the underlying cause of kidney failure, and personal preferences all influence which treatment path is most suitable. Medical societies and healthcare professionals follow clinical guidelines to recommend standard treatments, but there is also a growing body of research into new therapies being tested in clinical trials. These innovative approaches may offer hope for better outcomes in the future.^[14]

Standard Treatment for Kidney Failure

Standard treatment for renal failure includes a range of medicines and therapies designed to address the underlying causes and manage complications. For many people with chronic kidney disease, the first step is controlling conditions that damage the kidneys, such as diabetes and high blood pressure. These are the two most common causes of kidney failure, and managing them effectively can slow down further decline in kidney function.^[1][9]

Blood Pressure Control

Keeping blood pressure under control is vital to protect the kidneys from further harm. Clinical guidelines generally recommend aiming for blood pressure below 140/90 mmHg, though people with diabetes may be advised to target even lower levels, such as below 130/80 mmHg. A group of medicines called angiotensin converting enzyme (ACE) inhibitors, such as ramipril, enalapril, and lisinopril, are often prescribed. These drugs help relax blood vessels, lower blood pressure, and reduce strain on the kidneys.^[15]

If ACE inhibitors cause troublesome side effects, such as a persistent dry cough, doctors may switch to a similar class of drugs called angiotensin-II receptor blockers (ARBs). Both ACE inhibitors and ARBs are recommended in clinical guidelines because they not only lower blood pressure but also have protective effects on the kidneys themselves.^[15]

Diabetes Management and SGLT2 Inhibitors

For patients with type 2 diabetes or those with high levels of a protein called albumin in the urine (a sign of kidney damage), doctors may prescribe a type of medicine called an SGLT2 inhibitor, such as dapagliflozin. This medication helps lower blood sugar and has been shown to reduce damage to the kidneys. Sometimes, an additional drug called finerenone is added. Finerenone works by blocking certain hormones that can harm the kidneys, offering extra protection.^[15]

Cholesterol Management

People with chronic kidney disease face a higher risk of heart disease and stroke. To reduce this risk, doctors often prescribe statins, such as atorvastatin or simvastatin. Statins lower cholesterol levels in the blood and help protect the heart and blood vessels. Common side effects include headaches, digestive upset, and muscle or joint pain, but most people tolerate them well.^[15]

Managing High Potassium Levels

As kidney function declines, levels of potassium in the blood can rise to dangerous levels, a condition called hyperkalaemia. High potassium can cause muscle weakness, tiredness, and irregular heartbeats, which can be life-threatening. Patients are usually advised to avoid certain foods high in potassium and to be cautious with some blood pressure medicines that can raise potassium further. In severe cases, a medicine called sodium zirconium cyclosilicate may be used to bring potassium levels down, but this is only recommended in specific situations, such as when levels are very high or when other treatments have not worked.^[15]

Other Medications and Supportive Care

Patients with kidney failure often need medicines to manage other complications. For example, diuretics help the body get rid of excess fluid and reduce swelling. Drugs to treat anemia, high phosphorus levels, or bone problems may also be prescribed. The duration of these treatments is usually long-term, and doses are adjusted based on regular blood tests to monitor kidney function and other health markers.^[11]

Side effects vary depending on the medicine. For example, diuretics can cause increased urination and dehydration, while some treatments for anemia may cause flu-like symptoms. Patients are encouraged to discuss any side effects with their healthcare team so that adjustments can be made.

Advanced Treatment: Dialysis and Transplant

When chronic kidney disease progresses to stage 5, also known as end-stage renal disease (ESRD), the kidneys are functioning at less than 15 percent of their normal capacity. At this point, waste products and fluid build up in the body to dangerous levels, and patients typically need either dialysis or a kidney transplant to survive.^[1][5]

Dialysis

Dialysis is a treatment that takes over some of the work of the kidneys by filtering waste and excess fluid from the blood. There are two main types: hemodialysis and peritoneal dialysis.^[14]

Hemodialysis is usually performed at a dialysis center three times a week, with each session lasting about four hours. During the session, blood is removed from the body, passed through a machine that filters it, and then returned to the body. Some patients can perform hemodialysis at home if they have the right equipment and training. Peritoneal dialysis is done at home. A special fluid is placed into the abdomen through a catheter, where it absorbs waste products. The fluid is then drained out and replaced. This can be done several times a day or overnight using a machine.^[11]

Dialysis does not cure kidney failure. It is a lifelong treatment unless the patient receives a kidney transplant. While dialysis can help people live for many years, it requires a significant time commitment and can affect quality of life. Home-based dialysis options, such as home hemodialysis or peritoneal dialysis, offer more flexibility and freedom for work, travel, and daily activities.^[14]

Kidney Transplant

A kidney transplant involves surgically placing a healthy kidney from a donor into a patient’s body. The new kidney takes over the job of filtering blood. Transplants can come from living donors, often family members or friends, or from deceased donors. A successful transplant offers the best chance for a longer, more active life compared to dialysis, and it reduces the need for strict dietary and fluid restrictions.^[14]

However, not everyone is a suitable candidate for a transplant. Factors such as age, other health conditions, and the availability of a matching donor all play a role. Additionally, there are not enough kidneys available for all patients who need them, so many people must wait on a transplant list while receiving dialysis. After a transplant, patients need to take immunosuppressant medicines for life to prevent their body from rejecting the new kidney. These drugs can have side effects, including increased risk of infections and other health problems.^[14]

Conservative Management

Some patients, particularly those who are elderly or have multiple serious health conditions, may choose not to pursue dialysis or transplantation. Instead, they opt for conservative management or palliative care. This approach focuses on managing symptoms, maintaining comfort, and supporting quality of life for the time remaining, without attempting to prolong life through dialysis or surgery. Healthcare professionals work closely with patients and families to provide supportive care and help with decision-making.^[14]

Treatment in Clinical Trials

While standard treatments like dialysis and transplant have helped millions of people live with kidney failure, researchers continue to search for new and better therapies. Clinical trials are research studies that test innovative drugs, devices, and treatment approaches before they become widely available. Participating in a clinical trial can give patients access to cutting-edge therapies that are not yet approved for general use.^[12]

Clinical trials go through several phases. Phase I trials focus on testing the safety of a new treatment in a small group of people. Phase II trials involve more participants and aim to see if the treatment is effective and to learn more about side effects. Phase III trials compare the new treatment to the current standard treatment in large groups of patients to determine if it works better or has fewer side effects. Only after passing through these phases can a treatment be approved for widespread use.^[12]

Innovative Molecules and Therapies

Researchers are exploring a variety of new therapies for kidney disease. Some experimental treatments focus on targeting specific molecules or pathways involved in kidney damage. For example, some drugs aim to reduce inflammation in the kidneys or block harmful signals that lead to scarring and loss of kidney function. Others work by improving blood flow to the kidneys or protecting kidney cells from injury.

While specific code names or detailed results of trials for renal failure were not available in the sources provided, the general approach in research involves testing drugs that act on enzyme inhibitors, immune system modulators, and other molecular targets. These therapies are designed to slow or even stop the progression of kidney disease, potentially reducing the need for dialysis or transplant in the future.

Gene Therapy and Immunotherapy

Some of the most exciting areas of research involve gene therapy and immunotherapy. Gene therapy aims to correct genetic defects that cause certain types of kidney disease. By delivering healthy genes to kidney cells, researchers hope to restore normal kidney function. Immunotherapy involves using the body’s own immune system to fight disease or repair damaged tissue. These approaches are still in early stages of research but hold great promise for the future.^[12]

Who Can Participate in Clinical Trials?

Clinical trials have specific eligibility criteria, which may include the stage of kidney disease, age, overall health, and whether the patient has other medical conditions. Trials are conducted in hospitals and research centers around the world, including in Europe, the United States, and many other countries. Patients interested in joining a trial should discuss the option with their doctor, who can help find suitable studies and explain the potential benefits and risks.^[12]

It is important to understand that not all experimental treatments will work, and some may have unexpected side effects. However, clinical trials are carefully monitored by medical teams and regulatory bodies to protect patient safety. Participation is always voluntary, and patients can withdraw at any time.

Most common treatment methods

• Blood Pressure Management
  • Angiotensin converting enzyme (ACE) inhibitors such as ramipril, enalapril, and lisinopril to lower blood pressure and protect the kidneys^[15]
  • Angiotensin-II receptor blockers (ARBs) as an alternative if ACE inhibitors cause side effects^[15]
  • Aim for blood pressure below 140/90 mmHg, or lower in patients with diabetes^[15]
• Diabetes Control
  • SGLT2 inhibitors like dapagliflozin to lower blood sugar and reduce kidney damage^[15]
  • Finerenone added to block hormones that harm the kidneys^[15]
• Cholesterol Management
  • Statins such as atorvastatin and simvastatin to reduce cardiovascular risk in patients with chronic kidney disease^[15]
• Managing Complications
  • Diuretics to remove excess fluid and reduce swelling^[11]
  • Sodium zirconium cyclosilicate for severe high potassium levels^[15]
  • Medicines to treat anemia, high phosphorus, and bone problems^[11]
• Dialysis
  • Hemodialysis performed at a center three times per week or at home^[11]
  • Peritoneal dialysis done at home, either during the day or overnight^[11]
• Kidney Transplant
  • Surgical placement of a healthy kidney from a living or deceased donor^[14]
  • Requires lifelong immunosuppressant medicines to prevent rejection^[14]
  • Offers the best chance for a longer and more active life^[14]
• Conservative Management
  • Palliative care focused on symptom management and comfort without dialysis or transplant^[14]

Lifestyle Changes and Self-Care

In addition to medical treatments, making healthy lifestyle choices is a crucial part of managing kidney failure. These changes can help slow the progression of kidney disease, reduce symptoms, and improve overall wellbeing.

Healthy Eating

A balanced diet can help protect the kidneys and support general health. Patients are usually advised to eat plenty of fresh fruits and vegetables, whole grains, and low-fat dairy products, while cutting back on salt, added sugars, and saturated fats. Limiting salt intake to less than 2,300 milligrams per day can help control blood pressure and reduce fluid retention.^[22]

For people with more advanced kidney disease or those on dialysis, there may be additional dietary restrictions. For example, they may need to limit foods high in potassium and phosphorus. Working with a dietitian who specializes in kidney disease can help patients plan meals that are both nutritious and safe.^[15]

Regular Physical Activity

Exercise is beneficial for people with kidney disease at all stages. It can boost energy, improve sleep, strengthen bones, and reduce the risk of heart disease and depression. Most people with mild to moderate kidney disease can exercise as often and as vigorously as someone with healthy kidneys. Those with more advanced disease may tire more easily, but staying active is still important. Patients should talk to their doctor about which types of exercise are safe and appropriate for them.^[23]

Quitting Smoking and Limiting Alcohol

Smoking can make kidney disease worse and interfere with blood pressure medicines. Quitting smoking is one of the best things a person can do for their kidney health. Similarly, limiting alcohol intake is important, as excessive drinking can increase blood pressure and harm the kidneys.^[21]

Mental Health and Support

Living with kidney failure can be emotionally challenging. Patients may feel anxious, depressed, or overwhelmed by the demands of treatment. It is important to seek support from family, friends, healthcare providers, or mental health professionals. Support groups and peer networks can also provide valuable emotional support and practical advice from others who understand what it is like to live with kidney disease.^[12]