Revisiting Fat Graft Harvesting and Processing Technique to Optimize Its Regenerative Potential.

Early human evidence such as case series or small samples is exploring possible benefits.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Background The use of fat grafting has expanded to include cell and tissue regeneration, necessitating investigations to ensure the viability of stromal and adipose-derived mesenchymal stem cells (ASCs) within the transferred fat parcels. This study explored the impact of harvesting technique and centrifugation on the viability of stromal cells and ASCs in lipoaspirate. Methods Fat was harvested from patients undergoing fat grafting using 2 types of liposuction cannula: (A) a 3-mm blunt tip cannula with 3 smooth holes and (B) a 2.4-mm, sharp point port, multihole blunt tip cannula. Fat from cannula B underwent different processing methods: no centrifugation, 300 g , 600 g , and 900 g centrifugation. Stromal cells were isolated, quantified, and evaluated for viability. ASCs were cultured from these samples to confirm survival. Results Lipoaspirates from 21 patients were analyzed. The mean stromal cell counts were 0.937 × 10 9 ± 0.346 × 10 9 /mL for cannula A and 0.734 × 10 9 ± 0.266 × 10 9 /mL for cannula B ( P = 0.684), with viabilities of 98.79% and 98.22% ( P = 0.631), respectively. ASCs isolated and after 2-passage culture were also higher for cannula A. Stromal cell quantification and viability were lowest in the noncentrifuged group ( P g centrifugation group. Conclusions Fat harvesting using cannulas A and B showed no significant difference in stromal cell yield or viabil

Evidence level

Early human evidence such as case series or small samples is exploring possible benefits.

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