1 Eczema is not a single disease but a reaction pattern of the skin produced by a number conditions. 2  Atopic dermatitis, a common causes of eczema, is more prevalent in those with asthma and hay fever. 3  Eczema appears as small blisters that can weep and ooze, or as crusted, thickened plaques of skin.czema facts. 1  Eczema is not a single disease but a reaction pattern of the skin produced by a number conditions. 2  Atopic dermatitis, a common causes of eczema, is more prevalent in those with asthma and hay fever. 3  Eczema appears as small blisters that can weep and ooze, or as crusted, thickened plaques of skin.
Asthma is a disease affecting the airways that carry air to and from your lungs. People who suffer from this chronic condition (long-lasting or recurrent) are said to be asthmatic. The inside walls of an asthmatic's airways are swollen or inflamed.
Interpretation of Arterial Blood Gases in Asthma. The changes in the arterial blood gases are most interesting when you observe the progression of asthma from mild to moderate to severe to extreme disease. At the start of an asthma attack the normal PaO2 of 100 mm Hg falls (e.g. to 60mm Hg), the PaCO2 of 40 mm Hg falls (e.g. to 30 mm Hg) and the pH of 7.40 rises (e.g. to 7.50).