Renal Failure
Renal failure, also known as kidney failure, is a serious condition where your kidneys stop working effectively. Your kidneys are vital organs responsible for filtering waste products, excess water, and toxins from your blood, which are then passed out of your body as urine. When your kidneys fail, these harmful substances build up in your body, leading to a range of health problems. This can happen suddenly (acute kidney failure) or develop gradually over many years (chronic kidney disease, which can progress to chronic kidney failure). The causes of renal failure vary depending on whether it's acute or chronic. Acute kidney failure can be triggered by sudden severe dehydration, a significant drop in blood flow to the kidneys (like from a heart attack or severe infection), or blockages in the urinary tract. Chronic kidney failure, which is more common, often develops as a complication of long-term conditions such as uncontrolled high blood pressure, diabetes, certain autoimmune diseases, or inherited conditions like polycystic kidney disease. Understanding the underlying cause is crucial for effective treatment. Because kidney disease often has no obvious symptoms in its early stages, laboratory tests are incredibly important for detection and monitoring. Blood tests, such as those measuring creatinine and BUN (blood urea nitrogen), along with calculations like your Glomerular Filtration Rate (GFR), show how well your kidneys are filtering waste. Urine tests can also detect protein or blood, which are signs of kidney damage. These tests help your doctor detect kidney problems early, determine the severity of the condition, track its progression, and guide the most appropriate treatment plan to protect your kidney health.
Common Symptoms
- Fatigue and weakness
- Swelling in the legs, ankles, or feet
- Decreased urine output
- Nausea and vomiting
- Loss of appetite
Clinical Sources
- Kidney Failure: Stages, ESRD, Causes, Symptoms & TreatmentCleveland Clinic
Diagnostic Lab Tests
Tests commonly used to diagnose or monitor Renal Failure:
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