Mechanical ventilation for acute exacerbation of fibrosing interstitial lung diseases

Background: Acute exacerbation of fibrosing interstitial lung diseases, including idiopathic pulmonary fibrosis, is associated with poor prognosis. Accordingly, tracheal intubation and invasive mechanical ventilation are generally avoided in such patients. However, the ef-ficacy of invasive mechanical ventilation for acute exacerbation of fibrosing interstitial lung diseases remains unclear. Therefore, we aimed to investigate the clinical course of patients with acute exacerbation of fibrosing interstitial lung diseases who were treated with invasive mechanical ventilation. Methods: We retrospectively analyzed 28 patients with acute exacerbation of fibrosing interstitial lung diseases who underwent invasive mechanical ventilation at our hospital. Results: Of the 28 included patients (20 men, 8 women; mean age, 70.6 years), 13 (46.4%) were discharged alive and 15 died. Ten patients (35.7%) had idiopathic pulmonary fibrosis. Univariate analysis revealed that longer survival was significantly associated with lower partial pressure of arterial carbon dioxide (hazard ratio [HR] 1.04 [1.01-1.07]; p = 0.002) and higher pH (HR 0.0002 [0-0.02] levels; p = 0.0003) and less severe general status according to the Acute Physiology and Chronic Health Evaluation II score (HR 1.13 [1.03-1.22]; p = 0.006) at the time of mechanical ventilation initiation. In addition, the univariate analysis indicated that patients without long-term oxygen therapy use had significantly longer survival (HR 4.35 [1.51-12.52]; p = 0.006). Conclusions: Invasive mechanical ventilation may effectively treat acute exacerbation of fibrosing interstitial lung diseases if good ventilation and general conditions can be maintained.(c) 2023 The Japanese Respiratory Society. Published by Elsevier B.V. All rights reserved.