Ultrasonographic Evaluation of the Diaphragm During NHF Versus NIV Use in Respiratory Failure

Ultrasonographic Evaluation of the Diaphragm During NHF Versus NIV Use in Respiratory Failure

This study will describe influence of NHF or NIV to different ultrasonographic parameters of the diaphragm. Therefor subjects will be randomized to the sequence NHF and than NIV or NIV and than NHF. In all subjects same parameters will be evaluated.

Inclusion Criteria:

• acute or chronic respiratory failure, hyperemic or hypercapnic
• age > 18 yrs
• written consent

Exclusion Criteria:

• critical disease (intubation, heart failure, lung edema,..)
• no compliance
• metabolic acidosis