Pulmonary Vascular Resistance Calculator (PVR)

Pulmonary Vascular Resistance Calculator (PVR) | Online Free Tool | Elysia Tools

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Health
Input types: number
Output type: json
Sample coverage: 4
API ready: Yes

Overview

The Pulmonary Vascular Resistance Calculator computes PVR from mean pulmonary artery pressure (mPAP), pulmonary capillary wedge pressure (PCWP), and cardiac output (CO). It returns the result in Wood units and dyn·s/cm⁵, with a reference category based on the 3 Wood threshold.

When to use

When reviewing hemodynamic measurements from right heart catheterization.
When comparing pulmonary vascular resistance across clinical assessments.
When you need PVR shown in both Wood units and dyn·s/cm⁵.

How it works

1Enter mPAP in mmHg, PCWP in mmHg, and cardiac output in L/min.
2The calculator subtracts PCWP from mPAP to determine the pressure gradient.
3It divides the pressure gradient by cardiac output: PVR = (mPAP − PCWP) / CO.
4It converts Wood units to dyn·s/cm⁵ using 80 × PVR and displays the selected number of decimal places.

Use cases

Reviewing right heart catheterization hemodynamics in cardiology, pulmonology, or critical care.
Checking PVR calculations during pulmonary hypertension assessment.
Converting PVR results between Wood units and dyn·s/cm⁵ for clinical documentation.

Examples

1. Normal pulmonary vascular resistance

Clinician reviewing catheterization data

Background

A hemodynamic assessment provides mPAP of 15 mmHg, PCWP of 8 mmHg, and cardiac output of 5 L/min.

Problem

Calculate PVR and check whether it is below the reference threshold of 3 Wood units.

How to use

Enter mPAP as 15, PCWP as 8, CO as 5, and set Decimal Places to 2.

{"mpap":15,"pcwp":8,"co":5,"decimalPlaces":2}

Outcome

The pressure gradient is 7 mmHg. PVR is 1.40 Wood units, or 112 dyn·s/cm⁵, and the result is categorized as Normal PVR.

2. Elevated pulmonary vascular resistance

Pulmonary hypertension team

Background

A patient assessment records mPAP of 35 mmHg, PCWP of 10 mmHg, and cardiac output of 5 L/min.

Problem

Quantify the elevated PVR in both supported units.

How to use

Enter mPAP as 35, PCWP as 10, CO as 5, and set Decimal Places to 2.

FAQ

What inputs does the PVR calculator require?

It requires mPAP, PCWP, and cardiac output. Pressures are entered in mmHg and cardiac output in L/min.

What is the PVR formula?

PVR = (mPAP − PCWP) / CO, reported in Wood units.

How are Wood units converted to dyn·s/cm⁵?

The calculator multiplies the Wood-unit result by 80.

What does a result below 3 Wood units mean?

The tool labels results below 3 Wood units as Normal PVR. This reference category is not a diagnosis.

Can this calculator replace medical advice?

No. Use the result with clinical data and professional medical interpretation.

{"mpap":35,"pcwp":10,"co":5,"decimalPlaces":2}

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Continue with connected tools and hubs

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Normal pulmonary vascular resistance

2. Elevated pulmonary vascular resistance

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