Difficulty

Access to the subject's vasculature is troublesome or formidable.

Issue associated with the user's ability to cause device settings or actions to change to the state desired by the user. …

Issue associated with difficulty for end-users to operate device, specifically as it relates to the opening or removal of the outer…

A question about whether an individual finds or found it difficult looking at themselves naked.

Issue associated with difficulty of a transponder system to trigger a response.

Issue associated with problems introducing or inserting the device, even if the user is operating the device in accordance with the instructions…