The most common error in use of pressurized metered dose inhalers (pMDIs)is

Question

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The number of patients using pMDIs incorrectly ranges from 12% to 89%,according to available studies.Problems with pMDI use include the following:
Failure to coordinate actuation of pMDI with inhalation (27%)
Too short a period of breath hold after inhalation (26%)
Too rapid an inspiratory flow rate (19%)
Inadequate shaking and mixing of pMDI contents before use (13%)
Abrupt cessation of inspiration as aerosol strikes throat (cold Freon effect)(6%)
Actuation of pMDI at total lung capacity (4%)
Firing of pMDI into mouth but inhaling through nose (2%)
Exhaling during pMDI actuation
Placing wrong end of inhaler in mouth or holding in wrong (nonvertical)position
Failure to take cap off before use
Firing of pMDI multiple times during a single inhalation

The Most Common Error in Use of Pressurized Metered Dose