Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semi-upright position . Comparison is made with the next preceding similar study obtained 1 hour and 20 minutes earlier . The patient is intubated , the ETT terminating in the trachea some 4 cm above the level of the carina . As before , a tiny right apical pleural separation indicates a residual pneumothorax which does not show tension or increase . Metallic grid structures of cor valve prosthesis is noted in place , unchanged in position . Heart size has not increased and the pulmonary vasculature is not congested . Previously identified right subclavian approach central venous line and right - sided chest tube with pigtail end configuration and mediastinal drainage line advanced from below as before .
    OUTPUT:
    
Appropriate placement of NGT , unchanged findings in patient who received cor valve prosthesis , no pulmonary congestion presently .