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Table 6 Intestinal mucosal damage grading score

From: The study of n-3PUFAs protecting the intestinal barrier in rat HS/R model

Grade

Histological characteristic(s)

Grade 0

Normal mucosal villi

Grade 1

Subepithelial Gruenhagen’s space (oedema), usually at the apex of the villus

Grade 2

Extension of the subepithelial space with moderate lifting of epithelial layer from the lamina propria

Grade 3

Massive epithelial lifting down the sides of villi; a few tips may be denuded

Grade 4

Denuded villi with lamina propria and dilated capillaries exposed

Grade 5

Digestion and disintegration of lamina propria; haemorrhage and ulceration