Abstract
MCGREGOR AND MORGAN (1973), using dye injections to delineate the territory of axial pattern flaps, found that the area outlined was consistently shorter than the length which could reliably survive when raised as a flap. They deduced therefore that the basic axial pattern flap had such a good blood supply that it was capable of supporting a random pattern flap at its end. In order to study this possibility the following experimental model in rats was devised. About half of a rat’s abdominal wall will survive as an axial pattern flap based on the epigastric vessels. At the same time, no branches of any size cross the abdominal midline. It seemed therefore that a reliable flap extension to the axial pattern flap would be across the midline.
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