What is Riggotomies and How is It Done? Is It Different from Fat Grafting?

Here is one suggestion for my problem of over-suctioned lipo and that is "Riggotomies". This is very new for me. I searched the net. I am not able to find any significant info for the same. What is "Riggotomies"? How is it done? What are the risks and complications? How long does it take to correct the problem area? Is it same as the fat grafting "unpredictable"?