[Effect of a new front opening liposuction cannula on survival of transplanted fat tissue]

To investigate the effect of a new front opening liposuction cannula on the survival of transplanted fat tissue.

Two groups of fats were obtained from the left and right sides of a female patient during the abdomen liposuction surgery, respectively. And the fats in experimental group and control group were harvested by the new front opening liposuction cannula and the side hole liposuction cannula, respectively. The differences of adipocyte activity in vitro between 2 groups were compared by observation under the electron scanning microscopy and the glucose transportation test. Then, the fats in 2 groups ( n=20) were injected subcutaneously into the back of 20 nude mice (400 mg fats per injection zone). The differences of the injection area reactions, remaining weight, histological characteristics, and microvessel density (MVD) between 2 groups were compared after 4 weeks and 12 weeks.

Compared with the control group, in vitro, the adipocytes were more plump and the vascular structures were more abundant. The glucose transportation quantities were (3.049±0.266) mmol/L and (2.668±0.250) mmol/L in experimental and control groups, showing significant difference between groups ( t=2.956, P=0.010). There was only one fat liquefaction occurred in the injection zone of the control group after 4 weeks. The experimental group had more clear adipocytes, more vessels, and less inflammation and necrosis than the control group. The remaining weight and MVD were higher in the experimental group than in the control group after 4 and 12 weeks, showing significant differences ( P<0.05).

The new front opening liposuction cannula can reduce the damage of adipocytes and improve the survival of transplanted fat tissue.