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Vascular cryopreservation in microsurgery

F Mesa1, J M Serra, J Herreros

  • 1Department of Plastic and Reconstructive Surgery, CES University, Medellin, Colombia.

Journal of Reconstructive Microsurgery
|May 1, 1997
PubMed
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Fresh autografts offer the best patency for vascular repair. Cryopreserved allografts provide a viable alternative when autografts are unavailable, showing good patency rates with minimal impact on vessel integrity.

Area of Science:

  • Vascular Surgery
  • Tissue Engineering
  • Cryobiology

Background:

  • Cryopreservation of blood vessels has been utilized for decades with inconsistent outcomes.
  • Vascular allografts and autografts are used to repair vascular defects.

Purpose of the Study:

  • To compare the efficacy of cryopreserved femoral artery allografts, fresh autografts, and fresh allografts in a rabbit model.
  • To evaluate patency rates and histological changes in different vascular graft types.

Main Methods:

  • A rabbit model was employed to assess three types of vascular grafts: cryopreserved femoral artery allografts (n=12), fresh autografts (n=15), and fresh allografts (n=16).
  • Graft patency and histological alterations were evaluated at 1 and 3 months postoperatively.

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Main Results:

  • Fresh autografts demonstrated the highest patency rates (86.7%).
  • Cryopreserved allografts showed patency of 66.7% at 1 month and 83.3% at 3 months.
  • Fresh allografts had lower patency rates (62.5% at 1 month, 75% at 3 months) and exhibited the most significant histological changes, including endothelial cell damage and intima thickening.

Conclusions:

  • Fresh autografts are the preferred choice for vascular reconstruction due to superior patency and minimal tissue alteration.
  • Cryopreserved allografts represent a suitable alternative when autografts are not feasible, offering acceptable patency and manageable histological changes.
  • Histological alterations in allografts, including pseudoendothelium formation and cellular infiltrate, did not negatively impact vascular patency.