Chest bellows disease

Asthma COPD Parenchymal Disease Chest Bellows Disease... 

Mechanical restriction caused by chest bellows malfunction may result from chest wall or skeletal deformity, loss of neuromuscular function, fibrosis of the pleural space, and abdominal overdistension causing upward displacement of the diaphragm, as well as decreased diaphragm movement. The most common pulmonary function pattern seen in these patients is a decrease in TLC and VC with only a slight decrease in RV. The RV is maintained in these diseases because lung compliance remains normal. The Dlco is normal or only minimally reduced, and the Dlco a (corrected for alveolar volume) is normal. The RV/TLC ratio is often increased in patients with restrictive chest bellows disease. Patients with neuromuscular disease also have reduced respiratory muscle function with a reduction in their MIP. 

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See also in sourсe #XX -- [ ]

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