How To Treat Dis-functioning Of Gall Bladder?

I ve been referred by my doctor to a surgeon to have my gall bladder removed. Patient portal lab results from Hida scan. Liver normal, gall bladder not emptying properly, is at 34 percent, normal being 38 percent. Question, based on these findings, is their an alternative medicine, diet, or holistic approach, ratherthann surgery? And wher do I find credible information?