Ultrafast Ultrasound for the Functional Assessment of the Diaphragm

The aims of the current study are as follows: i) Investigate the relationships between indices derived from ultrafast ultrasound imaging and Pditw, ii) Investigate the relationships between indices derived from ultrafast ultrasound imaging and diaphragm EMG, iii) Investigate the performance of ultrafast ultrasound for the diagnosis of diaphragm dysfunction, iv) Investigate the ability of ultrafast ultrasound imaging to decipher the cause of diaphragm dysfunction i.e. contractility alteration and/or phrenic nerves conduction defect.

Inclusion Criteria: * \> 18 years old * Patients with confirmed diaphragm dysfunction or suspicion * Written informed consent * Able to comply with all protocol requirements * Affiliate or beneficiary of a social security scheme Exclusion Criteria: * Known allergy to latex * Known allergy to Lidocaine or similar product * Pacemaker * Guardianship/trusteeship * Pregnant or nursing women