Overview
The purpose of this study is to evaluate the relationship between transdiaphragmatic pressure (Pdi) and diaphragm shear-wave elastography (SWE) during state-of-the-art respiratory muscle testing including volitional efforts (e.g., maximal inspiratory pressure, maximal expiratory pressure, Valsalva maneuver), as well as maximal phrenic nerve stimulation.
Eligibility
Inclusion Criteria:
- Adult male and female healthy volunteers.
Exclusion Criteria:
- Volunteers who are pregnant.
- Volunteers with known pulmonary pathology (COPD, asthma requiring routine treatment).