The acapella® is a device used by people with certain lung diseases (COPD, asthma, Cystic Fibrosis) to help clear lung secretions.
The main journal description. There is one attribute for “Dose”:
The “Dose” attribute is described as an Amount, with a unit of “minutes”, and an default amount of “30″:
The resulting Event Entry screen:
Read more about acapella on the Smiths Medical website.