Rational selection of inhalation devices in the treatment of chronic obstructive pulmonary disease by means of the System of Objectified Judgement Analysis (SOJA)

Study which compared inhalers with SOJA method found that several devices require more or less identical techniques, (e.g. Ellipta and Diskus/Accuhaler) and that initiating these specific products it allows for uniformity as additional medicines are available via the same devices

SPS commentary:

The study also found that the resistance of Respimat and Breezhaler is lower than that of other devices, which makes these devices suitable for patients who cannot generate sufficient inhalation flow.


The SOJA method is based on following criteria: uniformity in device, number of steps per inhalation, risk of errors, hygienic aspects, feedback mechanism, and risk of inhalation with an empty inhaler


European Journal of Hospital Pharmacy