Scar tissue after colon resection causing bowel obstruction

My mother had colorectal cancer removed in 2014 with an ileostomy bag for 3 months then the were able to reconnect the colon. She is currently in the hospital with an obstruction most likely caused by scar tissue at the point where the reconnect was done. Does anyone know the removal procedure? They have tubed down her nose pumping out fluids for 3 days now and IV fluids, no food or liquid as she puked that up, only ice chips and swabs. Looking at surgery. Is this going to be a situation where she will require another bag????? Or can this cobe corrected lapescope?