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Case Reports in Otolaryngology
Volume 2016 (2016), Article ID 9471696, 4 pages
Case Report

Noninvasive Free Flap Monitoring Using Eulerian Video Magnification

Department of Otolaryngology-Head and Neck Surgery, Loma Linda University Medical Center, Loma Linda, CA, USA

Received 24 December 2015; Accepted 10 March 2016

Academic Editor: Mu-Kuan Chen

Copyright © 2016 Yuan Fang Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Eulerian Video Magnification (EVM) can enhance subtle changes in videos to reveal what was once invisible to the naked eye. In this proof of concept study, we investigated using EVM as a novel form of free flap monitoring. Free flaps with skin paddles were filmed in the operating room with manipulation of their pedicles. In a representative 77-year-old female who received a latissimus dorsi-serratus-rib composite free flap, EVM was able to detect blockage of arterial or venous supply instantaneously, providing a visible representation through degree of color change in videos. EVM has the potential to serve as a powerful free flap monitoring tool with the benefit of being noninvasive, sensitive, easy-to-use, and nearly cost-free.