An expandable adapter collar assembly is provided for use with a surgicalaccess porthaving an outer diameter in order to increase the apparent outer diameter ofthe combination ofthe surgical access port and expandable collar in order to conform to the sizeof a surgicalincision. The expandable adapter collar is an inflatable collar which isselectively detachablypositionable so as to surround the surgical access port and expandable from adeflated orcontracted smaller diameter to an inflated or expanded larger diameter to fillthe surgicalincision. The expandable adapter collar may be provided as part of anexpandable collarassembly including a source of inflation fluids. There is also provided amethod of adapting asurgical access port for use in a surgical incision having a size larger thanthe original designparameters for the surgical access port.