Twisting of any portion of the intestines may cut off the supply of blood to a loop of bowel (strangulation), reducing the flow of oxygen to bowel tissue (ischemia) and leading to tissue death (gangrene).
Some children with intussusception may appear lethargic or have altered mental status, believed by physicians to be related to ischemia of the bowel and a decreased level of consciousness.
Stress on the bone, ischemia (reduced blood supply), and trauma to the site are commonly mentioned factors.
Ischemia usually occurs when an artery is compressed as it passes through a tightly flexed joint.
"Falling asleep" occurs when the blood supply to a nerve is cut off-a condition called ischemia.
For those with frequent paresthesias caused by ischemia, changes in posture may help.