Pulmonary Function Ratio Calculator

This calculator determines the Pulmonary Function Ratio (FVC/IC) and other vital lung capacity measurements. It helps in assessing respiratory function.

Input Parameters

Calculation Results

Calculation Formula

Pulmonary Function Ratio (PFR) = FVC / IVC

Where:
FVC = Forced Vital Capacity
IVC = Inspiratory Vital Capacity

Pulmonary Function Ratio (PFR): -
Forced Vital Capacity (FVC): -
Inspiratory Vital Capacity (IVC): -

Pulmonary Function Ratio Calculator Calculator Usage Guide

Learn how to use the Pulmonary Function Ratio Calculator and its working principles

How to Use the Calculator

  1. Enter the Forced Vital Capacity (FVC) in liters. This is the total volume of air a person can expel after a maximal inhalation.
  2. Enter the Inspiratory Vital Capacity (IVC) in liters. This is the maximum volume of air that can be inhaled after a normal expiration.
  3. Click the "Calculate" button to compute the Pulmonary Function Ratio (PFR) and other results.
  4. Click "Reset" to clear all inputs and results.

Understanding the Results

The Pulmonary Function Ratio (PFR) is calculated as the ratio of Forced Vital Capacity (FVC) to Inspiratory Vital Capacity (IVC). A normal PFR value typically ranges from 0.7 to 1.0. Values outside this range may indicate respiratory conditions such as obstructive or restrictive lung diseases.

Working Principle

This calculator uses the formula PFR = FVC / IVC to determine the ratio of exhaled volume to inspiratory capacity. This ratio helps in assessing the efficiency of lung function and can be used to diagnose various pulmonary disorders.