A method is described for predicting the outcome of experimental free flaps at the time of surgery using a directional ultrasound Doppler flowmeter. Tests of both arterial and venous anastomoses have been developed. Provided that both anastomoses are individually assessed, the technique is 100% accurate and is recordable. Spectral analysis of truly directional Doppler signals has provided knowledge of the peripheral resistance within a flap. © 1983.
Jones, B. M., & Greenhalgh, R. M. (1983). The use of the ultrasound Doppler flowmeter in reconstructive microvascular surgery. British Journal of Plastic Surgery, 36(2), 245–253. https://doi.org/10.1016/0007-1226(83)90101-7