Dynamic changes of pulmonary lesions on CT in patients with severe acute respiratory syndrome treated by non-invasivc positive pressure ventilation / 中华放射学杂志

ABSTRACT

Objective To study the dynamic changes of pulmonary lesions of severe acute respiratory syndrome(SARS)treated by non-invasive positive pressure ventilation(NIPPV)on CT. Methods Serial chest CT images in 18 patients with SARS were retrospectively analyzed before and after NIPPV(4—12 days),and a long-term follow-up(3—36 months)examination by CT was carried out.And 27 SARS cases without NIPPV were enrolled as the control group.Results(1)There were dynamic changes in 15 cases of 18 casespartial multilobar consolidations of bilateral lungs changed into ground-glass opacities in 7 of 18 cases,a circular pulmonary emphysema around bronchial vascular strains of the lower lobes was seen in 5 of 18,subpleural pulmonary emphysema was seen in 8 of 18,pulmonary barotraumas were showed in 2 of 18.Residual of subpleural curvilinear shadow related to NIPPV was found in 2 cases on the follow-up scan.(2)Above changes on CT were not found in 27 cases without NIPPV.Conclusion There were changes of pulmonary lesions of SARS on CT related to NIPPV treatment,It is beneficial to assess the CT images in the NIPPV treatment of the related pneumonia in SARS.