“TO AND FRO” BLOOD FLOW MATHEMATICAL MODEL IN VENOUS FLAP SURVIVAL

The aim of the research is to determine “to and fro” venous flap blood circulation perfusion ability and flap size survival. Materials and methods: “To and fro” blood circulation mathematical model based on the theory of compressed liquid flow thought the porous medium. Result: Designed mathematical model allows to calculate the viable flap size that depends on pedicle vessel radius, the blood pressure gradient, the blood viscosity, the elastic tissue capacity, the pulse frequency, vessels flap topography and surgical pedicle flap technique. Viable flap width may extent up to 4-6 cm. Conclusions: Only thin skin or fascial flaps, were through venous pedicle with a lot of side branches located under the flap surface and along central flap axis may survive with “to and fro” blood circulation.