From: Ipsilateral common iliac artery plus femoral artery clamping for inducing sciatic nerve ischemia/reperfusion injury in rats: a reliable and simple method
Histopathologic grade
Edema
IFD (ischemic fiber degeneration)
0
normal
≤ 2%
1
Mild edema
3–25%
2
Moderate edema
26–50%
3
Severe edema
51–75%
4
Severe and widespread edema
>75%