Portions of CastMinder are more useful in some cases than in others. A great illustration of this is a buildup of pressure. A patient who has broken her arm but is otherwise healthy and walking around would be immediately able to sense when the pressure in her cast is getting too high, as she would feel pain. However, a patient who is unconscious in a hospital would not be able to communicate such problems. Thus, having a sensor inside of such a patient's cast can prove immensely useful for physicians.

A moisture sensor is useful for most patients. Oftentimes it can be quite difficult to detect the presence of moisture inside of a cast.

The active healing unit is obviously useful for any patient, as an increase in bone formation and a decrease in pain would be beneficial to anyone.