1. What is Blood Flow Rate Calculation?

Definition: This calculator determines the volumetric flow rate of blood through a vessel based on blood velocity and vessel cross-sectional area.

Purpose: It helps medical professionals and students understand and calculate blood circulation parameters.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q_b \) — Blood flow rate (mL/min)
• \( V_b \) — Blood velocity (cm/s)
• \( A_v \) — Vessel cross-sectional area (cm²)

Explanation: The blood velocity is multiplied by the cross-sectional area of the vessel to get flow rate in cm³/s, then converted to mL/min.

3. Importance of Blood Flow Calculation

Details: Accurate blood flow measurement is crucial for diagnosing circulatory disorders, assessing vascular health, and planning surgical procedures.

4. Using the Calculator

Tips: Enter the blood velocity in cm/s and vessel cross-sectional area in cm². All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a normal blood flow rate?
A: Normal values vary by vessel: ~5000 mL/min for aorta, ~200-400 mL/min for carotid arteries.

Q2: How is blood velocity typically measured?
A: Clinically measured using Doppler ultrasound or other imaging techniques.

Q3: Why convert to mL/min?
A: mL/min is a more clinically relevant unit for blood flow measurements.

Q4: Does this account for pulsatile flow?
A: No, this calculates mean flow rate. For pulsatile flow, more complex calculations are needed.

Q5: How does vessel diameter affect flow?
A: Flow is proportional to the square of the radius (A_v = πr²), so small diameter changes significantly affect flow.