Liposuction, English refers to the extraction of fat in medical books. Liposuction is a method of removing fat fragments by using instruments through small incisions in the skin and deep into the subcutaneous fat layer, which is suitable for body shaping. To do liposuction, general anesthesia should be done first, and a wound of about 0.5 to 1.0 cm should be cut at the liposuction site, then the catheter should be directly inserted into the bottom of the fat accumulation, and then the excess fat should be pumped out by a vacuum compressor. This surgical method is called "dry pumping". Another method is to inject water and drugs after anesthesia, so that the fat cells at the liposuction site swell up, and then insert a straw for liposuction. This method is called "wet liposuction". The average adult can bear 500 ml of blood loss. Therefore, the traditional vacuum suction liposuction method only needs more than 4000ml； at a time; Ultrasonic liposuction does not exceed 10000 ml at a time, which is equivalent to 10 kg of fat, which belongs to the safe range. After liposuction, "fattening" cells will become fat again. Liposuction is still possible at this time, but the surgical site has become fibrotic, and the traditional liposuction effect is not good. Ultrasound liposuction is needed to be effective. Liposuction can be done countless times in a lifetime, but each time it is more technically difficult. At present, there are several common liposuction operations: ultrasonic liposuction, electronic liposuction and the most common 3L positioning layered liposuction.

Ultrasonic suction is to generate ultrasonic waves with a certain frequency through an ultrasonic generator, aim at the weight-losing part, crush fat cells or fat particles through ultrasonic vibration, and then squeeze or suck them out. In theory, it does not damage blood vessels and nerves, but the effect is slow in practical application, and blood vessels and nerves are still damaged.

Electronic liposuction is to destroy cellulite by generating a high-frequency electric field with a certain wavelength at the two poles of an electromagnetic generator, producing chylous liquid and sucking it out. The actual type of this equipment needs to be further summarized and evaluated in clinical practice.

3L positioning layered liposuction, making it swollen or even white, then fat cells or particles penetrate into a large amount of salt water and rupture and dissolve themselves, and then put a metal suction tube connected with a vacuum negative pressure pump under the skin through a hidden small incision, and suck out the fat through negative pressure.

Liposuction is widely used in high-end plastic surgery in China and South Korea. It is an original minimally invasive technique, which does not need dressing after operation and does not affect normal work, shopping and social interaction. Perform local anesthesia according to the needs of various parts of the body, so that patients can consciously communicate with experts at any time during the operation, reduce their fear of surgery and lose weight safely. (1) Simple local fat deposition without skin relaxation, male breast development and patients under 30 years old are the best indications for liposuction.

(2) Fat deposition accompanied by moderate skin relaxation, liposuction alone.

(3) Fat deposition accompanied by severe skin relaxation, liposuction combined with skin plastic surgery.

(4) The skin is flabby without fat deposition, which is suitable for skin and soft tissue plastic surgery.

(5) Other relative indications are severely obese patients and elderly obese patients. There is no age limit for liposuction to lose weight, but liposuction experts will set the best age for liposuction to lose weight at 18-55 years old. Because liposuction is too young to lose weight, it will affect physical development and is not suitable for liposuction; For the elderly, due to the poor skin elasticity and recovery ability of patients, symptoms such as skin relaxation may occur after surgery, which may easily affect the effect after liposuction and weight loss surgery.