Dynamic Compliance Equation

## Introduction

Pulmonary compliance, or lung compliance, is a measure of the lungs ability to stretch and expand. In clinical practice it is seperated into two different measurements, static compliance and dynamic compliance. The calculating of lung compliance demonstrates the relationship between changes in volume and changes in pressure within the airways. This measurement is important because it can often be one of the first warnings of a developing lung disease.

## Dynamic Compliance

Dynamic compliance represents the lung compliance during both inhalation and exhalation. This measurement uses peak pressure rather than plateau pressure, as in the static compliance equation, in order to show lung compliance while the lungs are in motion.

## Dynamic Compliance Equation

\begin{align} {C_{dyn}}=\frac{V_t}{PIP-PEEP} \end{align}