compliance
Pronunciation: kuhm-PLAHY-uhns
Measure of lung distensibility, representing the change in lung volume per unit change in pressure.
Full Definition
Pulmonary compliance refers to the ability of the lungs to stretch and expand in response to changes in pressure, mathematically defined as the change in lung volume divided by the change in transpulmonary pressure. Normal lung compliance allows for efficient ventilation with minimal work of breathing. Reduced compliance (stiff lungs) is seen in conditions such as respiratory distress syndrome, pneumonia, pulmonary edema, or fibrosis, requiring higher pressures to achieve adequate ventilation. Increased compliance (floppy lungs) can occur in emphysema or aging. In pediatric intensive care, monitoring compliance helps guide mechanical ventilation strategies and assess disease progression or response to treatment.
Usage
Usage note: Distinguish between static and dynamic compliance in mechanical ventilation contexts.
In Context
- "Static compliance measurements showed significant improvement following surfactant administration." — Ventilator management note
- "Decreased lung compliance required higher PEEP settings to maintain adequate oxygenation." — Respiratory therapy note