Today a little something relatively professional for those who are interested. I should say that autologous fat grafting is a very old, very old program that was being done by plastic surgeons over 100 years ago, but it has always been a half-dead program and not many doctors have done it. With the invention and popularity of swelling liposuction technology 30 years ago, liposuction became safer and more effective. In addition, 20 years ago an American proposed structural fat grafting (Coleman), the fat grafting project seems to be like a dead wood to spring back to brilliant vitality, especially in recent years the U.S. FDA allows autologous fat breast augmentation, particulate fat grafting and nano-fat grafting and other new concepts, fat grafting has become one of the most popular cosmetic surgery projects, no less than Botox and hyaluronic acid and other injections. . Well, there are many benefits of using autologous fat as filler graft. So, I guess the most important concern for you guys is the “survival rate” of fat. This is also an inherent problem of fat grafting itself. How to improve the survival rate of fat and reduce the absorption rate? Some foreign doctors have done a lot of research and studies and summarized a lot of high quality clinical literature, and came to the following conclusions: 1. There is no significant difference in the vitality of fat cells in different parts. Some domestic experts believe that the fat of the thighs is better than the fat of the abdomen. In fact, this is unfounded. There is no difference in the vitality of fat cells in different parts, and there is no difference in the stem cell content. Therefore, the clinical decision of where to take the fat is mainly to respect the wishes of the client. The most commonly taken are thighs and abdomen. 2. The local anesthetic lidocaine has an effect on the survival of fat cells. It is true that lidocaine affects the metabolism, growth and survival of fat cells, but this is only true if lidocaine is always present, and if the fat is removed by washing after the fat is extracted, then this effect does not exist. 3. There is no difference in the effect of syringe liposuction and machine liposuction on the survival rate of fat cells. 4. There is no difference in the effect of fat extraction and purification using washing or centrifugation on fat survival. 5, fat suction, purification and injection transplantation action should be gentle. The shear force on the fat cells should be small, otherwise, the fat cells are more damaged. 6, the fat is purified and injected as soon as possible after extraction. The longer it stays outside the body, the lower the survival rate. 7, fat injection should be even. The diameter of fat mass injected at each point cannot exceed 1.5mm, otherwise, the central part of the fat mass will be necrotic because it cannot absorb the nutrients. The common facial fat filling areas are forehead, temples, nose root, nose bridge, apple muscle, cheeks, chin and other areas. The amount of injection varies with each person’s basic condition: about 30-50ml for forehead, 10-20ml for each side of the temple, and at least 3ml for the apple muscle, depending on the doctor’s experience and aesthetics. There is only a small needle hole at the injection site, which is relatively small and usually does not need to be closed with sutures, just seal the needle hole with erythromycin eye ointment and then put on a sterile patch. Theoretically, fat babies are delicate and neither cold nor heat resistant (the principle of cryolipolysis and ultrasound lipolysis is to take advantage of the fact that fat is neither cold nor heat resistant), and many doctors recommend neither cold nor hot compresses after surgery, and let the recovery take its natural course.