Forced Oscillation Versus Spirometry in Diagnosing Post Pulmonary Transplant Bronchiolitis Obliterans Syndrome

A study to evaluate the role of forced oscillation in precocious diagnosis of bronchiolitis obliterans syndrome in patients with pulmonary transplant (time difference in detecting distal airways functional impairment by forced oscillation and the standard technique using spirometry).

Inclusion Criteria:

• Patients of more than 18 year-old.
• Patients with cardiopulmonary transplant or bilateral lung transplant.
• Clinically stable patients

Exclusion Criteria:

• Patients already diagnosed with bronchiolitis obliterans.
• Respiratory infection.
• Acute graft rejection.
• Mechanical complications (bronchial dehiscence, pneumothorax, pleural effusion).
• Iatrogenic pneumopathy.
• Inability to perform Respiratory function test.