Chronic Renal Failure (Chronic Kidney Disease - CKD) is the gradual, progressive, and irreversible loss of renal filtering capacity over months or years. As nephrons degrade, kidneys lose the ability to filter waste products, balance electrolytes, and regulate body fluid levels.
Causes & Primary Risk Factors
- Diabetic Nephropathy: Uncontrolled diabetes mellitus is the leading cause worldwide.
- Hypertension (High Blood Pressure): Chronically elevated pressure damaging renal arterioles.
- Chronic Glomerulonephritis: Autoimmune inflammation of kidney filtering units.
- Polycystic Kidney Disease (PKD): Genetic condition causing multiple fluid-filled cysts in kidneys.
- Recurrent Pyelonephritis & Urinary Obstruction: Repeated kidney infections or long-standing stones.
- Smoking, Obesity, & High Cholesterol: Accelerates renal microvascular damage.
Stages of Chronic Kidney Disease (CKD)
| Stage | eGFR (mL/min/1.73m²) | Kidney Status & Symptoms |
|---|---|---|
| Stage 1 | ≥ 90 | Normal function with early kidney damage (proteinuria/microalbuminuria). |
| Stage 2 | 60–89 | Mild reduction in filtration; usually asymptomatic. |
| Stage 3 | 30–59 | Moderate reduction; swelling, rising blood pressure, early anemia. |
| Stage 4 | 15–29 | Severe reduction; pronounced edema, fatigue, nausea, metabolic acidosis. |
| Stage 5 | < 15 | End-Stage Renal Disease (ESRD); kidney failure requiring dialysis or transplant. |
Symptoms
- Early stages: Asymptomatic.
- Later stages: Progressive fatigue, persistent edema (swelling of legs, ankles, face), foamy urine, nocturia, nausea, loss of appetite, metallic taste in mouth (uremic fetor), dry itchy skin (pruritus), muscle cramps, anemia, and difficult-to-control hypertension.
Management & Progression Delay Protocol
- Strict Blood Pressure & Glycemic Target: BP < 130/80 mmHg, HbA1c < 7.0%.
- Renoprotective Medications: ACE Inhibitors (Lisinopril) or ARBs (Losartan), and SGLT2 Inhibitors to reduce intra-glomerular pressure and delay ESRD.
- Renal Nutritional Therapy: Low-protein, low-sodium (< 2g/day), low-potassium, and low-phosphorus diet under nephrology guidance.
- Anemia & Bone Disease Management: Erythropoietin-stimulating agents (ESA), iron supplementation, and phosphate binders.
- Renal Replacement Therapy (Stage 5): Maintenance Hemodialysis, Peritoneal Dialysis, or Kidney Transplantation.
