Lung function testing tutorial: pitfalls for the unwary when performing spirometry

ABSTRACT

Spirometry is a simple; reliable; and informative tool in the assessment of respiratory function. It has many indications in both the diagnosis and monitoring of respiratory disease; but in Africa it could be most immediately useful in quantifying the unknown burden of chronic obstructive pulmonary disease (COPD) related to indoor air pollution as well as the burden of asthma. In order to ensure that spirometry is reliable; quality control is essential. In particular; normal values must be regionally appropriate; technique must be well taught; and equipment must be properly calibrated. In 2005; the ATS/ERS Task Force (American Thoracic Society and European Respiratory Society) issued guidelines aimed at integrating existing international guidelines. Good standards for spirometry will result in a useful; narrow range of normal values for a population and abnormalities in lung function will be easily detected. The aim of this article is to address the key issues regarding basic spirometry standards; and to highlight the common pitfalls