Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval removal of multiple lines and tubes . Right IJ central line remains present , tip over distal SVC . There are low inspiratory volumes . No obvious pneumothorax is detected . Patchy retrocardiac opacity and patchy opacity at the right base are similar to the prior film . No gross effusion is identified . Status post sternotomy , with prosthetic valve . Cardiomediastinal silhouette is grossly unchanged , consistent with recent surgery . No CHF .
    OUTPUT:
    
1 . Status post removal of chest tubes . No obvious pneumothorax detected . Tiny pneumothorax might not be apparent . 2 . Otherwise , I doubt significant interval change .