I think what he means by kink is adhesions.
Just touching the small intestine can cause adhesions.
Surgery to remove adhesions can create new adhesions.
They used to use seprafilm to help prevent adhesions, I wonder if the surgeon used that.
My son had early adhesions after colectomy leading to an ileus,this is just a few days after surgery.
Anyway it was bad, what got him on the road to recovery, believe it or not was the surgeon had
my son get down on his knees, the surgeon grabbed his hips and shook side to side pretty hard, a few
times, this must have broken the early adhesions, recovery followed pretty quick after that.
His surgeon was an old timer, had done thousands of j-pouches and had seen everything.
Of course in your fathers case he probably has older adhesions, which would not break by shaking.
Here is something on adhesions.