Body Plethysmograph (Lung Volume Measurement System)
A body plethysmograph is an advanced pulmonary function testing device used to measure lung volumes, airway resistance, and gas trapping. The patient sits inside an airtight chamber and breathes through a mouthpiece while the system records pressure and airflow changes. This test helps diagnose obstructive and restrictive lung diseases such as asthma, COPD, and pulmonary fibrosis.