Objective 5: List Common Causes of Chronic Renal Failure

Chronic Renal Failure

Progressive and generally irreversible destruction of functioning nephrons over months or years.

Chronic Glomerular Disease

Long-term disease affecting the glomeruli and progressively decreasing filtration.

Glomerulonephritis

Inflammation and damage of the glomeruli that interfere with normal blood filtration.

Glomerulosclerosis

Scarring and hardening of the glomeruli, replacing normal filtration tissue with scar tissue.

Congenital Kidney Diseases

Structural or developmental kidney abnormalities present from birth that may impair kidney function.

Inherited Kidney Disorders

Genetic conditions that can progressively damage renal tissue and cause CKD.

Systemic Disorders

Diseases affecting the entire body that can damage kidney structures and circulation.

Diabetes Mellitus as a Cause of CKD

Chronic hyperglycemia damages glomerular blood vessels and filtration structures.

Diabetic Kidney Disease

Kidney damage caused by prolonged elevated blood glucose, resulting in progressive glomerular injury and scarring.

Glomerular Basement Membrane Thickening

A change associated with diabetic kidney disease that contributes to impaired filtration.

Increased Glomerular Permeability

Abnormal leakage through the glomerular filtration barrier associated with diabetic kidney damage.

Hypertension as a Cause of CKD

Long-term elevated blood pressure damages renal blood vessels and progressively destroys nephrons.

Hypertensive Nephrosclerosis

Thickening and narrowing of small renal arteries and arterioles due to chronic hypertension.

Renal Ischemia from Hypertension

Reduced blood flow caused by narrowed renal vessels, resulting in kidney tissue damage.

Chronic Nephrotoxic Exposure

Prolonged exposure to medications or toxic substances that gradually damages kidney tissue.

Acute Nephrotoxic Injury

Sudden kidney damage following exposure to a harmful substance.

Chronic Nephrotoxic Injury

Cumulative kidney damage resulting from prolonged or repeated exposure to toxic substances.

Progressive Nephron Loss

Gradual destruction of functioning nephrons, resulting in declining GFR.

Fibrosis in CKD

Replacement of normal renal tissue with scar tissue that cannot perform normal kidney functions.

What causes chronic renal failure?

Progressive destruction of functioning nephrons over months or years.

What happens to remaining nephrons as CKD progresses?

They increase their filtration activity to compensate for lost nephrons.

What eventually happens when compensation is no longer sufficient?

GFR decreases and normal kidney function deteriorates.

How does glomerulonephritis cause CKD?

Chronic inflammation damages the glomeruli and reduces filtration.

What is glomerulosclerosis?

Scarring and hardening of the glomeruli that replaces functioning filtration tissue.

How can congenital kidney diseases cause CKD?

Structural or developmental abnormalities interfere with normal kidney function.

How can inherited kidney disorders cause chronic renal failure?

Genetic abnormalities can progressively damage kidney tissue.

How does diabetes mellitus damage the kidneys?

Chronic hyperglycemia damages glomerular blood vessels and filtration structures.

What happens to the glomerular basement membrane in diabetic kidney disease?

It becomes thickened, contributing to impaired filtration.

How can diabetes increase glomerular permeability?

Chronic hyperglycemia damages the filtration barrier, allowing abnormal leakage.

How does hypertension cause chronic renal failure?

Long-term high blood pressure damages renal vessels and progressively destroys nephrons.

What is hypertensive nephrosclerosis?

Thickening and narrowing of small renal arteries and arterioles caused by chronic hypertension.

How does hypertensive nephrosclerosis damage nephrons?

Narrowed vessels decrease renal blood flow, causing ischemia and tissue destruction.

How can prolonged nephrotoxic exposure cause CKD?

Repeated or sustained exposure gradually damages renal tubular cells and other kidney structures.

What is the difference between acute and chronic nephrotoxic injury?

Acute injury occurs suddenly; chronic injury develops gradually through cumulative exposure.

What happens when functioning nephrons are replaced by fibrosis?

Normal filtration tissue is replaced by nonfunctioning scar tissue.

What are the major chronic renal failure causes to remember?

Glomerulonephritis, glomerulosclerosis, congenital abnormalities, diabetes, hypertension, and chronic nephrotoxic exposure.