Mario, not meaning to lighten the mood too much but you are in an ideal position to test the minor miracle of music in controlling pain.

Suitable mp3 players are about 10 Loonies. Load it with music from the patient's HS years and watch their pain start to lessen. There is a new medical field recognized by Medical Authority called Music Therapy. It certainly is better than addictive narcotics and no side affects.

Over-the-head headphones are preferred over ear-buds because patients can self manage headphones.