An axial-pattern rat skin flap based on the caudal femoral artery is d
escribed with orthotopic and heterotopic island flap transfers. Free-t
issue transfers could also be carried out based on the common femoral
artery. Since the pedicle is very small, instead of selective dye inje
ction, a nonselective dye injection was utilized, elevating a very lar
ge island skin flap based on the caudal femoral artery. This flap mode
l can provide an alternative opportunity to study the physiology of sk
in flaps and for training in the basic principles of plastic surgery,
including microsurgical practice, with a more challenging model.