Pathophysiology, diagnosis and treatment of intermittent claudication in patients with lumbar canal stenosis

Figure 5 Transverse sections of the nerve root seen under a fluorescence microscope. A: Ischemia model. Evans blue albumin (EBA) emits a bright red fluorescence in clear contrast to the green fluorescence of the nerve tissue. After intravenous injection of EBA, EBA was limited inside the blood vessels, and the blood-nerve barrier was maintained; B: Congestion model. EBA emits a bright red fluorescence, which leaked outside the blood vessels, and intraradicular edema was seen under a fluorescent microscope. Reproduced with permission from Kobayashi et al[42].