Nephrology

Diagram of kidney structures

Nephrology is a specialty of medicine that focuses on the kidneys, specifically their function, diseases, and treatment. Nephrologists are physicians who specialize in the care and treatment of patients with kidney disorders.

Anatomy of the Kidney

The kidneys are vital organs located in the retroperitoneal space of the abdomen. Each kidney is approximately the size of a fist and is responsible for filtering blood, removing waste, and balancing electrolytes.

Structure

The kidney is composed of several distinct regions:

• Cortex: The outer layer of the kidney, which contains the glomeruli and the proximal and distal convoluted tubules.
• Medulla: The inner region, which contains the loop of Henle and the collecting ducts.
• Renal pelvis: The funnel-shaped structure that collects urine from the collecting ducts and channels it into the ureter.

Functions of the Kidney

The primary functions of the kidneys include:

• Filtration: The process of filtering blood to remove waste products and excess substances, forming urine.
• Regulation: Maintaining homeostasis by regulating the balance of electrolytes, acid-base balance, and blood pressure.
• Hormone production: Producing hormones such as erythropoietin, which stimulates red blood cell production, and renin, which regulates blood pressure.

Common Kidney Diseases

Nephrologists diagnose and treat a variety of kidney diseases, including:

• Chronic kidney disease (CKD): A long-term condition characterized by a gradual loss of kidney function.
• Acute kidney injury (AKI): A sudden decrease in kidney function, often due to injury or illness.
• Glomerulonephritis: Inflammation of the glomeruli, which can lead to kidney damage.
• Polycystic kidney disease (PKD): A genetic disorder characterized by the growth of numerous cysts in the kidneys.

Treatment Modalities

Treatment for kidney diseases may include:

• Dialysis: A procedure that performs the function of the kidneys by removing waste and excess fluid from the blood.
• Kidney transplantation: A surgical procedure to replace a diseased kidney with a healthy one from a donor.
• Medications: To manage symptoms and slow the progression of kidney disease.

Related Pages

• Urology
• Hypertension
• Diabetes mellitus
• Electrolyte imbalance