NR 340
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NR 340 Critical Care Exam 3 Guide
- Exam (elaborations) • 27 pages • 2023
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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 ...
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