* A common cause of tissue ischaemia is [[Intestine Physical Disturbances - Pathology#Positional Changes/ Displacements|strangulation of the intestine]] by a twist upon itself.
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* A common cause of tissue ischaemia is [[Torsion, Intestinal|strangulation of the intestine]] by a twist upon itself.
** Compression of the mesenteric veins prevents outflow of blood
** Compression of the mesenteric veins prevents outflow of blood
*** The affected portion becomes congested and swollen.
*** The affected portion becomes congested and swollen.