What technology measures chest wall displacement during breathing?

Strain belts are a recognized technology used to measure chest wall displacement during breathing. These belts consist of elastic materials that can stretch and contract according to changes in the thoracic and abdominal dimensions as the person breathes. When attached around the chest and abdomen, they detect the movement associated with inhalation and exhalation. This data can provide valuable insights into the dynamics of respiration, including the assessment of respiratory mechanics and the evaluation of various respiratory conditions.

In contrast, the other technologies listed serve different purposes. For example, a pneumotachograph measures airflow and provides information about airflow rates and volumes, but it does not directly measure chest wall displacement. Electroglottoscopy is used to visualize vocal fold movement and assess phonatory function, while ultrasound imaging can visualize respiratory structures and dynamics, but it does not primarily measure chest wall displacement directly. Therefore, strain belts are the appropriate choice for assessing chest wall movement during breathing activities.