After I recovered from my surgery, I had another surgery to have my port put in. One item I recommend after port surgery is a seat belt cushion. This seat belt cushion attaches to your seat belt and serves as a pillow between your port and the seat belt. It prevents the seat belt from rubbing your port site.
(I do not have a medical background, this post was written based on personal experience. Anchored in Hope is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com.)