In 2005 the American Thoracic Society (ATS) and the European Respiratory Society (ERS) Task Force published a series addressing “Standardisation of Lung Function Testing”.  Click Here for Number 2 in the series – “Standardisation of Spirometry” which addresses both equipment performance and patient test results quality standards.  

This link will take you to a comprehensive listing of the American Thoracic Society’s Official Documents regarding pulmonary function testing.  http://www.thoracic.org/statements/pulmonary-function.php