Abstract
Partial or complete necrosis of skin flaps remains a significant problem in plastic
and reconstructive surgery. Growth factors have shown promise in improving flap survival
through increased angiogenesis and blood supply to the flap. Vascular endothelial
growth factor (VEGF) is the most widely investigated and successful one. But the mechanisms
of the effects are still not very clear. In the course of a series of experiments,
we indicated that tissue survival of surgical flaps could be improved by both preoperative
(sustained phase effect) and intraoperative (acute phase effect) application of VEGF.
We reviewed both experimental and clinical investigations on the use of VEGF with
surgical flaps to summarize the evidence of both phases of VEGF activity in promotion
of flaps survival in detail. With the combinations of acute and sustained phases of
effects, VEGF protein and gene, VEGF morphologic actions, and VEGF histochemical modulations
suggest a pattern of VEGF activity that can be superimposed on classic descriptive
mechanisms of tissue survival of flaps.
Keywords
flaps - vascular endothelial growth factor - mechanism