https://en.m.wikipedia.org/wiki/Sugiura_procedure

I don't know if this will help, I also don't really understand this Sanguira surgery, but what I can catch from the source of information is that Sanguira's surgery is complex surgery. For further information, please read the source above

introduce me from Indonesia, sorry if you don't understand my English because I'm not very fluent in English. Btw can you speak indonesian?