Respiratory disease is one of the first of the 5 causes of mortality worldwide; being one of the most common causes of temporary incapacity. The consumption of snuff; pollutants and early exposure to allergens; cause patients with bronchial asthma chronic obstructive pulmonary disease (COPD); or very frequent and at younger ages; thus the working lives of these people may be compromised and reduced; taking into account the social security systems worldwide are increasingly demanding a period of longer trading; to obtain an economic benefit. Unfortunately; the assessment of body damage in respiratory medicine; is usually done in chronic conditions where acute phenomena become considered less weight; those pathologies with an intermittent pattern (crisis); which present the greatest difficulty to be estimated.