[Circulation in myocutaneous flaps in the area of the tibia].

After a free myocutaneous flap transfer to the lower leg the necessary circulation may be prevented by spasm of the donor vessel, despite of a tension-free anastomosis. Application of bupivacaine-hydrochloride through a peridural catheter results in a sympathetic blockade. The ability thus to influence vascular spasms pharmacologically has been evaluated. Three clinical cases are presented discussing the surgical consequences of such pharmacological intervention.