Pulmonary Function Ratio Calculator

This calculator helps determine key pulmonary function metrics including Tidal Volume, Inspiratory Capacity, and the IC:TV Ratio, which are essential in assessing respiratory health.

Input Parameters

Calculation Results

Inspiratory Capacity (IC)

0.00 L

Inspiratory Capacity: Tidal Volume Ratio (IC:TV Ratio)

0.00

Calculation Formula

IC = TV + IRV

IC:TV Ratio = IC / TV

Where:
IC = Inspiratory Capacity
TV = Tidal Volume
IRV = Inspiratory Reserve Volume

Pulmonary Function Ratio Calculator Calculator Usage Guide

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

How to Use the Calculator

  1. Enter the Tidal Volume (TV) in Liters.
  2. Enter the Inspiratory Reserve Volume (IRV) in Liters.
  3. Enter the Expiratory Reserve Volume (ERV) in Liters.
  4. Click the "Calculate" button to compute the Inspiratory Capacity (IC) and the IC:TV Ratio.
  5. Use the "Reset" button to clear all input fields and start over.

Understanding the Results

The Inspiratory Capacity (IC) is a measure of the maximum volume of air that can be inhaled after a normal expiration. It is calculated by adding the Tidal Volume (TV) to the Inspiratory Reserve Volume (IRV).

The IC:TV Ratio is a key indicator of pulmonary function. A normal IC:TV Ratio is typically around 1.5 to 2.5. Values outside this range may indicate respiratory issues and should be discussed with a healthcare professional.

Principle Explanations

Pulmonary function tests are essential in evaluating respiratory health. The Tidal Volume (TV) measures the amount of air inhaled or exhaled during normal breathing. The Inspiratory Reserve Volume (IRV) measures the additional volume of air that can be inhaled after a normal inhalation. The Expiratory Reserve Volume (ERV) measures the additional volume of air that can be exhaled after a normal exhalation.

The Inspiratory Capacity (IC) combines the TV and IRV, providing an assessment of the lungs' ability to take in a deep breath. The IC:TV Ratio helps in understanding the efficiency of the respiratory system in managing normal breathing versus deeper breaths.