Level B· Emerging clinical evidence with positive signals
Comparing mechanical and enzymatic isolation procedures to isolate adipose-derived stromal vascular fraction: A systematic review
Uguten M., van der Sluis N., Harmsen M.C., van Dongen J.A.
Reviewed 26 articles covering 33 SVF isolation procedures (11 enzymatic, 22 mechanical): comparable cell yield and viability, but mechanical methods were faster and cheaper.
Level B· Emerging clinical evidence with positive signalsEvidence level of this study
Several human studies show positive signals, while research methods and sample sizes continue to develop.
- 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
- Study type
- Systematic Review
- Journal
- Wound Repair and Regeneration (2024)
- Country
- Netherlands
- Sample size
- —
- Follow-up
- Not applicable (procedure comparison)
- PMID
- 39444305
- DOI
- 10.1111/wrr.13228
What was studied
Which SVF isolation approach gives better cell yield, viability, processing time and cost.
Methods
- • Searched MEDLINE, EMBASE and Cochrane CENTRAL from September 2016 onward.
Key findings
- • Cell yield: enzymatic 2.3–18.0 × 10⁵ versus mechanical 0.03–26.7 × 10⁵ cells/mL.
- • Viability: enzymatic 70–99% versus mechanical 46–97.5%.
- • Processing time: mechanical 8–20 minutes versus enzymatic 50–210 minutes.
Limitations
- • No defined clinical threshold for adequate cell yield exists.
- • Most studies reported their methods poorly.
What this study does not prove
- • Does not show which isolation method produces better clinical outcomes.
- • This study does not prove SVF is an approved treatment or a replacement for standard care.
- • Limited follow-up cannot indicate long-term outcomes.
Clinical interpretation
Essential context when reading SVF literature: 'SVF' is not the same product across studies.
Evidence level: Emerging clinical evidence with positive signals