DIFFERENTIAL DIAGNOSIS OF DISTRIBUTION IMPAIRMENT ( NORMAL OR LOW PARTIAL PRESSURE OF CARBON DIOXIDE) CAUSING ARTERIAL HYPOXEMIA

Differential diagnosis of distribution impairment ( normal or low partial pressure of  carbon dioxide) causing arterial hypoxemia are : 
-bronchial mucus obstruction 
-neoplastic
-thoracic deformity 
-pneumoconiosis 
-pulmonary infarction 
-atelectasis
-emphysema
-bronchial asthma 
-pneumonia 
.