Utilization of Three-Dimensional Photography (VECTRA) for the Evaluation of Lower Limb Lymphedema in Patients Following Lymphovenous Anastomosis.

Purposes: Conventionally, lower limb circumference is measured using a measuring tape; however, a measuring tape may not provide sufficient precision to measure the magnitude of the lymphedema. We report the use of three-dimensional photography (VECTRA®) for the evaluation of lymphedema in patients after lymphovenous anastomosis (LVA). Methods: We calculated the percent error in measuring lower limb circumference with a measuring tape. We performed VECTRA before and after LVA and measured the change in volume. Because of the limitation of photographic range, the measurement of the entire lower limb was difficult using this approach. We were limited to thigh measurements. Results: The ratio of error was calculated using the largest and smallest mean measurements. The largest measurement errors, 4.3%-5.8%, were observed for the measurement of thigh circumferences, whereas the smallest measurement errors, 2.3%-2.9%, were observed in the foot and lower leg areas. The change in volume postoperatively measured using VECTRA decreased by an average of 35.1 cc. Conclusions: The evaluation with a measuring tape for the foot and lower leg region was useful because a lesser content of soft tissue was not influenced to the error by power. Contrarily, VECTRA was useful for measuring the thigh region because of the higher quantity of soft tissue, and the combination of both reduced the error.