Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Support devices including the Swan - Ganz catheter , ET tube , NG tube , bilateral chest tubes , and mediastinal drains have been removed . The Swan - Ganz catheter sheath remains in place . Sternotomy wires and surgical skin ___ are intact and aligned . Lung volumes are low . A small to moderate left pleural effusion with associated left basilar subsegmental atelectasis have increased . There is no pneumothorax . The right lung is clear . The patient has had prior right shoulder total arthroplasty .
    OUTPUT:
    
Increased small to moderate left pleural effusion with increased left basilar subsegmental atelectasis . No pneumothorax following removal of support devices .