This close to surgery it's not out of the question to have spasming like your surgeon said, regardless of what you eat. Keeping your diet liquid and low residue will make you more comfortable but the spasms will happen regardless. They should resolve in a week or two at the most though, I would think.
dx'ed UC pancolitis 5/12
past meds: asacol hd, VSL#3, apriso, rowasa, xifaxan, 6mp, cortifoam, pentasa, cimzia, canasa, butyrate, flagyl, cipro, prednisone, remicade, methotrexate, cholestyramine, cortenema
current meds: none!
step one: colectomy, end ileo 1/16/13
step two: j-pouch construction, loop ileo 5/1/13
step three: takedown 7/31/13