NR 340

NR 340 Critical Care Exam 3 Guide· Brain metabolism o Soul source of energy for the brain is glucose. Brain needs glucose to function. Brain cannot store it, but needs a constant supply. If glucose levels start to fall you will some changed. o Cerebral glucose < 70 mg/dL = confusion o Cerebral glucose < 20 mg/dL = damage · Cerebral blood flow · Autoregulation o Changes in pressure o Changes in CO2 ▪ Alters cerebral blood volume with change in blood vessel size o Ability ...