The technique involves a traditional staple line and the he tucks the staple line in and then STITCHES over that to make it more secure.
Think of a sleeve and plication combined, in a way...
Do a YouTube search for inverted gastric sleeve. There is an excellent video by a dr in TX that shows it. (Way to $$ for my pocket) Seeing this technique, but knowing I was going to Mexico, led me to start looking for Drs that did the oversewing and that's how I found Dr. Ortiz.