I have recently found some good information about the variations of rib resection according to TOS type. This was from the Washington University School of Medicine's Thoracic Outlet Syndrome Center. It is not overwhelming with information, so no information overload, it is focused and carries enough for you to grasp your situation and to see the possibilities open to you.

I also looked at a really good video on YouTube about 1st rib resection for venous TOS. Search for First rib resection for Paget-Schroetter Syndrome by VascularUAMS, University of Arkansas. Its a beauty!