Having a band placed on the stomach after an open rou-n-x procedure?

I am consulting with a physician and during his initial informational seminar, he said that he placed a band on the stomach after the stapeling and sewing. He said that he did this to make sure that the stomach never held more than what was originally sectioned off and this band would make food stay longer in the stomach before routing to the intestines. Is this method one that he does on his own or are most surgeon's doing this? Has anyone outside of the state of Oklahoma heard of this method? All input would be greatly appreciated.

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