Comparison of Shear-wave Elastography to State-of-the-art Respiratory Function Testing to Measure the Range of Forces Generated by the Diaphragm Muscle

Summary

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

Age range

18+ years

Sex

All

Healthy volunteers

Yes

Interventions

• Diagnostic Test
  Shear-wave elastography

  Ultrasound based imaging of diaphragm muscle activity

Location