The amount of fluid removed during liposuction consists of the removed body fat and the previously injected tumescent solution. The tumescent solution consists mainly of water and adrenaline and helps to minimize blood loss. Liposuction can remove up to eight percent of the body weight in fat volume per procedure (four to eight liters). The American Society of Plastic Surgeons defines five thousand milliliters as a large volume liposuction. There is no fact-based information on the maximum amount of fat that can be aspirated. In 2015, plastic surgeons from Chicago investigated the correlation between the amount of suction and the body mass index. They have found that minor complications (seromas) occur more frequently from a suction volume of one hundred milliliters per unit of body mass index. The risks of liposuction are lower in healthy patients. Obesity, diseases of the heart, lungs or metabolism, cigarette smoking and hormonal contraception are a health risk. These factors therefore also influence the risk of liposuction. How much fat can be suctioned out varies from patient to patient. The exact suction volume is determined during a personal consultation.