Each of the three of us had a pain pump we went home with postop. A simple gravity fed pump attached to tubing that was inserted in tiny incision under the arm. It had a strap and we pinned it on our shirt to prevent it from falling. It looked something like this, thought I do not know the exact brand.
A friend who is a nurse came over and removed it because I was squeamish, but I could do it now that I've seen and experienced it.