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Related Experiment Videos

Long-term fat preservation.

Yehuda Ullmann1, Oren Shoshani, Lucian Fodor

  • 1Department of Plastic and Reconstructive Surgery, Rambam Medical Center, Haifa, Israel.

Journal of Drugs in Dermatology : JDD
|June 5, 2004
PubMed
Summary
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Freezing autologous fat for 7 months significantly reduces graft quality and weight, suggesting it should be avoided for soft tissue reconstruction. Further research is needed to determine optimal fat preservation methods.

Area of Science:

  • Plastic Surgery
  • Regenerative Medicine
  • Tissue Engineering

Background:

  • Autologous fat grafting is a common plastic surgery technique for soft tissue defects.
  • Unpredictable fat absorption often requires repeat procedures.
  • Preserving harvested fat can minimize repeated harvesting.

Purpose of the Study:

  • To evaluate the effect of long-term (7 months) cryopreservation on autologous fat graft viability.
  • To assess the clinical and histological outcomes of frozen versus fresh fat grafts.

Main Methods:

  • Human fat from suction-assisted lipectomy was cryopreserved at -18°C for 7 months.
  • Frozen and fresh fat grafts were injected into the scalps of nude mice (n=10 per group).
  • Graft survival, volume, weight, and histology were compared after 15 weeks.

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Main Results:

  • Fat grafts survived in both frozen and fresh groups.
  • Frozen fat grafts showed significantly inferior histological parameters compared to fresh grafts.
  • Frozen fat grafts had significantly less weight and slightly less volume than fresh grafts.

Conclusions:

  • Cryopreservation of autologous fat for 7 months negatively impacts graft quality.
  • Avoid using fat frozen for 7 months or longer for soft tissue reconstruction.
  • Further studies are required to establish optimal fat preservation durations and conditions.