Seed, I think what might be bothering you is the trying to focus on the problem, thus giving it power. Instead, focus on JU healed with no trace left, i.e. a perfectly normal throat, body, etc., all of his body's cells regenerating as healthy, pink and well.
Allison said it well, by focusing on the Light, we are doing everything we can to give healing a chance. By visualising it as a done deal, we are giving thanks that healing has already taken place. Of course, it DOES help if the person believes in this kind of healing work and also that we ask "for this or something better for the highest good of all concerned."
Hope that helps.