Hemodynamic changes of the hand after radial forearm flap harvesting.

After radial forearm flap harvesting, there is some risk for hand circulatory disorders. To reveal the changes in circulatory dynamics in the hand after harvesting this flap, the authors compared blood pressure and flow by color Doppler ultrasonography in the donor and nondonor hands, and evaluated the long-term changes in these factors in 40 patients undergoing this operation. Blood pressure and flow of the index finger in the donor hands were lower than those in the nondonor hands during the first 2 months postoperatively, but they virtually returned to the level of those in the nondonor hands within 1 year of the operation. These results suggest that after harvesting the radial artery, collateral circulation in the hand developed during a short postoperative period. Therefore, the authors can predict the long-term safety of forearm flap harvesting by evaluating the hemodynamic changes of the digits caused by acute occlusion of the radial artery preoperatively, which would reflect the hemodynamics at an early postoperative stage.