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1.2 Chronic Obstructive Pulmonary Disease 1.2.1 Definitions and Terminology There are no universally accepted terminology or definition for the group of conditions characterised by airways obstruction that is completely reversible (Snider, 1996). There are several problems that have to be considered. The first results from the use of the term 'chronic obstructive pulmonary disease' (COPD), which is considered inaccurate since this is not truly a disease but a group of diseases. The second relates to the British preference for the terms 'chronic bronchitis' and 'emphysema', which although describing two conditions with an apparently more precise clinical or pathological definition, lack any reference to airways obstruction in their definitions. The third problem, which is the most difficult to resolve, is the concern over differentiating this condition from asthma, which the terms 'chronic bronchitis' and 'emphysema' seem to do whereas this is not the case for COPD. In all the recent consensus statements from scientific...

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