Ultrafast Ultrasound for the Functional Assessment of the Diaphragm — ECHOSTIM-EFR  

Diaphragm Dysfunction Clinical Trial

Official title: Ultrafast Ultrasound for the Functional Assessment of the Diaphragm: Agreement With Standards Mechanical and Electrophysiological Variables and Diagnosis Performance

Status Recruiting

Clinical Trial Summary

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.

Clinical Trial Description

The Neuromuscular Physiology and Evaluation Laboratory of the Institute of Myology recently reported that artificially stimulated diaphragm contraction may be captured and quantified using ultrafast ultrasound imaging. By filming the diaphragm at very high frame rate, one may extract ultrasound indices such as diaphragm thickening fraction and diaphragm tissue velocity. The same team showed that these indices, in particular, maximal diaphragm tissue velocity were strongly reliable and related to Pditw in healthy subjects. This approach bridges the gap between non-volitional (that are commonly combined with internal pressure measurements) and non-invasive procedures. Whether the relationships between indices derived from ultrafast ultrasound and Pditw exist in patients presenting with actual or suspicion of diaphragm dysfunction remains to be specifically investigated. Similarly, the potential of this approach for the diagnosis of phrenic conduction abnormalities remains to be assessed as it may help to circumvent confounding factors associated with surface EMG. ;

Related Conditions & MeSH terms

• Diaphragm Dysfunction

• NCT number: NCT05265351
• Study type: Interventional
• Source: Institut de Myologie, France
• Contact: Damien BACHASSON, PhD
• Phone: 01 42 16 66 43
• Email: d.bachasson@institut-myologie.org
• Status: Recruiting
• Phase: N/A
• Start date: May 24, 2023
• Completion date: September 30, 2024