4.6.1 Kidney Stones and Treatment

Introduction

Kidney stones are a common and painful disorder of the urinary system. They are solid crystal aggregates that form in the kidneys from minerals in the urine. Kidney stones can cause severe pain and may block the flow of urine. This topic explains the causes, symptoms, and treatment of kidney stones.

Definition

Kidney stones (also called renal calculi) are solid crystal aggregates formed in the kidneys from dietary minerals in the urine. They may develop in any part of the urinary system.

Kidney stones are usually composed of uric acid crystals or calcium oxalate.

Main Idea

Stones may develop in any part of the urinary system. Kidney stones are usually composed of uric acid crystals or calcium oxalate.

The causes of kidney stones are:

• Presence of high level of calcium in the blood because of other diseases.
• Presence of higher level of oxalate in the blood results in the formation of calcium oxalate stones.
• A decrease in water intake.
• Age and family history.

Core Concept

Causes, Symptoms, and Treatment of Kidney Stones

Detailed Explanation

1. What Are Kidney Stones?

Stones may develop in any part of the urinary system. Kidney stones are usually composed of uric acid crystals or calcium oxalate.

Simple explanation: Kidney stones are like tiny rocks that form inside the kidney. They are made of minerals that crystallize in the urine.

Why they form:

• When urine contains too much of certain minerals, they can crystallize and form stones.
• When urine is too concentrated (low water intake), minerals are more likely to crystallize.

2. Causes of Kidney Stones

The causes of kidney stones are:

(1) Presence of high level of calcium in the blood because of other diseases.

• High calcium in the blood (hypercalcemia) can lead to calcium stones.
• Conditions like hyperparathyroidism can cause high blood calcium.

(2) Presence of higher level of oxalate in the blood results in the formation of calcium oxalate stones.

• Oxalate is found in many foods (spinach, beets, nuts, chocolate).
• High oxalate in the blood can combine with calcium to form calcium oxalate stones.

(3) A decrease in water intake.

• Low water intake leads to concentrated urine.
• Concentrated urine allows minerals to crystallize more easily.

(4) Age and family history.

• Kidney stones are more common in adults.
• A family history of kidney stones increases the risk.

Simple explanation: Kidney stones form when there is too much calcium or oxalate in the blood, or when you do not drink enough water. Age and family history also play a role.

3. Symptoms of Kidney Stones

Symptoms:

• Severe pain in the kidney, abdomen, pelvis, and legs.
• Nausea and vomiting.

What happens:

• If a kidney stone passes into a ureter, it may stimulate severe pain.
• The pain is often described as sharp and cramping.
• It may come in waves.

Simple explanation: Kidney stones cause severe pain, especially when they move into the ureter. The pain can be felt in the back, side, abdomen, or legs.

4. Treatment of Kidney Stones

Treatment options:

(a) Drinking plenty of water:

• About 90% of all kidney stones can pass through the urinary system by drinking plenty of water.
• Water helps flush out the stones.

(b) Surgery:

• The kidney stone may be removed by surgery.
• Surgery is needed if the stone is too large to pass or is causing complications.

(c) Lithotripsy:

• There is a non-surgical method of stone removal called lithotripsy.
• It is a technique to break up stones that form in the kidney and ureter by shock waves targeted from outside the body.
• The shock waves break the stone into small pieces that can pass in the urine.

Simple explanation: Most kidney stones pass by drinking water. If not, surgery or lithotripsy may be needed. Lithotripsy uses shock waves to break the stone into small pieces.

5. Prevention of Kidney Stones

Prevention tips:

• Drink plenty of water (2–3 liters per day).
• Reduce salt intake.
• Avoid excessive oxalate-rich foods (spinach, beets, nuts, chocolate).
• Maintain a healthy diet.
• Treat underlying conditions (hyperparathyroidism, urinary tract infections).

Simple explanation: Drinking water is the best way to prevent kidney stones. Eating a healthy diet and treating underlying conditions also help.

Intermediate Level

Kidney stones are solid crystal aggregates formed in the kidneys.

Causes:

Symptoms:

• Severe pain in kidney, abdomen, pelvis, and legs.
• Nausea and vomiting.

Treatment:

Prevention:

• Drink plenty of water.
• Reduce salt and oxalate-rich foods.
• Treat underlying conditions.

Important Points

• - Stones may develop in any part of the urinary system.
• - Kidney stones are usually composed of uric acid crystals or calcium oxalate.
• - The causes of kidney stones are:
• - Presence of high level of calcium in the blood because of other diseases.
• - Presence of higher level of oxalate in the blood results in the formation of calcium oxalate stones.
• - A decrease in water intake.
• - Age and family history.
• - About 90% of all kidney stones can pass through the urinary system by drinking plenty of water.
• - The kidney stone may be removed by surgery.
• - There is a non-surgical method of stone removal called lithotripsy.
• - Lithotripsy is a technique to break up stones that form in the kidney and ureter by shock waves targeted from outside the body.
• - If a kidney stone passes into a ureter, it may stimulate severe pain in the kidney, abdomen, pelvis, and legs accompanied by nausea and vomiting.

Remember

• - Kidney stones = solid crystal aggregates
• - Composition = uric acid or calcium oxalate
• - Causes = high calcium, high oxalate, low water intake, age, family history
• - Symptoms = severe pain, nausea, vomiting
• - Treatment = water, surgery, lithotripsy
• - Lithotripsy = shock waves break stones
• - Prevention = drink plenty of water

Common Mistakes

• 1. Thinking all kidney stones require surgery.
• - About 90% of stones pass by drinking plenty of water.
• 2. Confusing lithotripsy with surgery.
• - Lithotripsy is a non-surgical method using shock waves.
• 3. Forgetting the role of water intake.
• - Low water intake is a major cause of kidney stones.
• 4. Mixing up the types of stones.
• - Calcium oxalate and uric acid are the most common.
• 5. Thinking kidney stones only affect older people.
• - Kidney stones can affect people of all ages, though they are more common in adults.
• 6. Believing kidney stones are always painful.
• - Small stones may pass without symptoms. Large stones cause severe pain.
• 7. Thinking kidney stones cannot be prevented.
• - Drinking plenty of water and eating a healthy diet can prevent kidney stones.

Quick Revision

60-Second Revision

• Kidney stones = solid crystal aggregates
• Composition = uric acid or calcium oxalate
• Causes = high calcium, high oxalate, low water intake, age, family history
• Symptoms = severe pain, nausea, vomiting
• Treatment = water (90% pass), surgery, lithotripsy
• Lithotripsy = shock waves break stones
• Prevention = drink plenty of water, healthy diet
• Warning: Do not think all kidney stones require surgery. Most pass by drinking water.