gen-define-sodium-and-blood-pressure-and-give-one-short-worked-e-476a

Define sodium and blood pressure and give one short worked example.

# Definitions **Sodium:** A mineral (chemical symbol: Na) that is essential for human health, primarily obtained through diet as sodium chloride (table salt). It helps regulate fluid balance, nerve signals, and muscle function in the body. **Blood Pressure:** The force exerted by circulating blood against the walls of blood vessels, measured in millimeters of mercury (mmHg). It's expressed as two numbers: - **Systolic** (top number): pressure when the heart beats - **Diastolic** (bottom number): pressure when the heart rests between beats Normal blood pressure is generally around 120/80 mmHg. --- # Worked Example **Scenario:** A patient currently consumes 3,500 mg of sodium daily and has blood pressure of 140/90 mmHg (Stage 1 hypertension). Their doctor recommends reducing sodium to the recommended limit of 2,300 mg/day. **Question:** What percentage reduction in sodium intake is needed? **Solution:** - Current intake: 3,500 mg - Target intake: 2,300 mg - Reduction needed: 3,500 - 2,300 = 1,200 mg Percentage reduction = (1,200 ÷ 3,500) × 100 = **34.3%** **Result:** The patient needs to reduce their sodium intake by approximately 34%, which could lower their blood pressure by an estimated 5-6 mmHg systolic over several weeks.