References and Useful Links
Journal articles
The following are links are to scholarly articles about inhaler technique, describing some of the studies which have looked at the best methods of usage.
B.L. Laube, H.M. Janssens, F.H.C. de Jongh et al. What the pulmonary specialist should know about the new inhalation therapies. Eur Respir J 2011; 37: 1308–1331.
http://www.ers-education.org/lrmedia/2011/pdf/156491.pdf
Mark L Levy, P N R Dekhuijzen, P J Barnes et al. Inhaler technique: facts and fantasies.
A view from the Aerosol Drug Management Improvement Team (ADMIT). Primary Care Respiratory Medicine (2016) 26, 16017
https://www.nature.com/articles/npjpcrm201617.pdf
Joaquin Sanchis, Chris Corrigan, Mark L. Levy, Jose L. Viejo.
Inhaler devices: From theory to practice.
Respiratory Medicine (2013) 107, 495-502
http://www.resmedjournal.com/article/S0954-6111(12)00458-1/fulltext
Useful sites
There is a wealth of other papers and material at the excellent website of the Aerosol Drug Management Improvement Team (ADMIT) at
https://www.inhalers4u.org/index.php/admit-publications/
The RightBreathe website lists guidelines, types of inhaler and spacer.