Physiological Effects of HFNC During Exercise in Patients With Fibrosing Interstitial Lung Diseases

Inclusion Criteria:

• Cared for as part of a respiratory rehabilitation program (ADIR association)
• Presenting diffuse fibrosing interstitial pneumonitis, documented by CT scan data andwhatever its etiology
• Presenting severe hypoxemia in ambient air (SpO2<90%) during an exercise test (6-minute walk test or functional exercise test)

Exclusion Criteria:

• Patient with a contraindication to carrying out a respiratory rehabilitation program
• Patient having presented an exacerbation of PID, pneumothorax or pneumomediastinum inthe 3 months preceding potential inclusion
• Tracheostomized patient
• Patient with a contraindication to the placement of a nasogastric tube
• Pregnant or breastfeeding women or women of childbearing age without effective meansof contraception (a pregnancy test will be carried out)
• Protected adult patient (guardianship or curatorship)
• Patient deprived of liberty by court or administrative decision
• Refusal of patient participation or consent