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Graph of the line width of the charcoal oximetry probe at different locations of the GI tract of the mouse when it was alive (A) and 30 min after respiratory arrest (B). The arrows show the position of each of the planar cross sections shown in Fig. 6: a, level of mid stomach; b, level of mid duodenum; c, level of mid colon and mid small intestine; and d, level of sigmoid colon–rectal junction.
