Figure 4.

Illustration of the distance between the transection lines planned and measured by the surgeon in mm 3 min after devascularization; (green) demonstrates good perfusion and (red) indicates poor perfusion. We decided to expand the tolerance area (yellow) to minus 4 mm, because of the diameter of the tip of the scissors, which is 4 mm and can cause incorrect measurements. Finally, in 73 cases, the surgeon placed the top of the scissors in the correct or acceptable perfused area.