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Peripheral Resistance Index Calculator

Calculate peripheral resistance index from mean arterial pressure, cardiac output, peripheral resistance, and age.

Peripheral Resistance Index Calculator

Calculate peripheral resistance index from mean arterial pressure, cardiac output, peripheral resistance, and age.

Input your peripheral resistance data

Formula

Peripheral resistance = (mean arterial pressure × 80) / cardiac output / 80 = MAP / CO (mmHg·min/L).

If resistance not provided: Calculated from mean arterial pressure and cardiac output. Simplified formula assumes central venous pressure is small.

Normal ranges: 10-20 mmHg·min/L or 800-1600 dynes·s/cm⁵. Values vary with age, fitness, and cardiovascular conditions.

Peripheral resistance is a major determinant of blood pressure. Higher resistance increases blood pressure, while lower resistance decreases it. Blood pressure = cardiac output × peripheral resistance.

Steps

  • Enter mean arterial pressure (MAP) (mmHg) from blood pressure measurement.
  • Enter cardiac output (L/min) from cardiac assessment.
  • Optionally enter peripheral resistance if calculated (mmHg·min/L).
  • Enter your age (peripheral resistance can change with age).
  • Review peripheral resistance index, cardiovascular status, and recommendations.

Additional calculations

Enter your peripheral resistance data to see additional insights.

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Complete guide snapshot

Peripheral resistance (systemic vascular resistance) is the resistance to blood flow in the systemic circulation. Normal range: 10-20 mmHg·min/L. It is a major determinant of blood pressure and is calculated from mean arterial pressure and cardiac output.

Use this calculator to assess peripheral resistance index from mean arterial pressure, cardiac output, peripheral resistance (optional), and age.

FAQs

What is peripheral resistance?

Peripheral resistance (systemic vascular resistance, SVR) is the resistance to blood flow in the systemic circulation. It is calculated as (MAP - CVP) / CO, where MAP is mean arterial pressure, CVP is central venous pressure, and CO is cardiac output.

How is peripheral resistance calculated?

Peripheral resistance = (mean arterial pressure - central venous pressure) / cardiac output. Simplified: SVR ≈ (MAP × 80) / CO (assuming CVP is small). Normal range: 800-1600 dynes·s/cm⁵ or 10-20 mmHg·min/L.

What are normal peripheral resistance values?

Normal peripheral resistance: 800-1600 dynes·s/cm⁵ or approximately 10-20 mmHg·min/L. Values vary with age, fitness, and cardiovascular conditions. Higher resistance indicates increased vascular resistance.

What causes high peripheral resistance?

High peripheral resistance can result from vasoconstriction, hypertension, atherosclerosis, aging, stress, medications (vasoconstrictors), or conditions affecting blood vessel function.

What causes low peripheral resistance?

Low peripheral resistance can result from vasodilation, sepsis, anaphylaxis, medications (vasodilators), exercise, or conditions causing widespread blood vessel dilation.

What is mean arterial pressure?

Mean arterial pressure (MAP) is the average pressure in arteries during one cardiac cycle. It is calculated as: MAP = DBP + 1/3(SBP - DBP), where SBP is systolic and DBP is diastolic blood pressure.

How does peripheral resistance affect blood pressure?

Peripheral resistance is a major determinant of blood pressure. Higher resistance increases blood pressure (hypertension), while lower resistance decreases blood pressure. Blood pressure = cardiac output × peripheral resistance.

Does age affect peripheral resistance?

Yes. Peripheral resistance typically increases with age due to arterial stiffening, reduced elasticity, and changes in vascular function. This contributes to age-related increases in blood pressure.

Can I measure peripheral resistance at home?

Home measurement is limited. Peripheral resistance is typically calculated in clinical settings using blood pressure and cardiac output measurements. Estimation requires specialized equipment.

When should I consult a healthcare provider?

Consult a healthcare provider if peripheral resistance is significantly abnormal, if you have hypertension or cardiovascular symptoms, or if you have concerns about cardiovascular function.

Summary

This tool calculates peripheral resistance index from mean arterial pressure, cardiac output, peripheral resistance (optional), and age.

Outputs include mean arterial pressure, cardiac output, peripheral resistance, resistance index, status, recommendations, an action plan, and supporting metrics.

Formula, steps, guide content, related tools, and FAQs ensure humans or AI assistants can interpret the methodology instantly.

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Peripheral Resistance Index Calculator

Calculate peripheral resistance index from mean arterial pressure, cardiac output, peripheral resistance, and age.

How to use Peripheral Resistance Index Calculator

Step-by-step guide to using the Peripheral Resistance Index Calculator:

  1. Enter your values. Input the required values in the calculator form
  2. Calculate. The calculator will automatically compute and display your results
  3. Review results. Review the calculated results and any additional information provided

Frequently asked questions

How do I use the Peripheral Resistance Index Calculator?

Simply enter your values in the input fields and the calculator will automatically compute the results. The Peripheral Resistance Index Calculator is designed to be user-friendly and provide instant calculations.

Is the Peripheral Resistance Index Calculator free to use?

Yes, the Peripheral Resistance Index Calculator is completely free to use. No registration or payment is required.

Can I use this calculator on mobile devices?

Yes, the Peripheral Resistance Index Calculator is fully responsive and works perfectly on mobile phones, tablets, and desktop computers.

Are the results from Peripheral Resistance Index Calculator accurate?

Yes, our calculators use standard formulas and are regularly tested for accuracy. However, results should be used for informational purposes and not as a substitute for professional advice.