NURS 3102 Study Guide - Final Guide: Cerebrospinal Fluid, Cerebral Circulation, Arachnoid Granulation
18 Feb 2017
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Document Summary
Intracranial pressure: review the basic concepts of intracranial dynamics. Mechanisms for intracranial dynamics: alter blood volume and csf production from absorption from arachnoid villi or decrease production from the plexus. If these fail then migration of brain tissue, coning or brain herniation. 3 components contributing to icp- brain tissue (80%), blood (10%), csf (10%) Auto-regulation of icp- blood & csf 10-20 mmhg. Auto-regulation of cerebral blood flow co2, o2, bp. Cerebral perfusion pressure at which the brain is adequately perfused with blood. Cerebral spinal fluid is produced in the ventricles and circulated around the brain and spinal cord. There are 4 ventricles, left & right lateral, and the third and fourth. The left and right lateral connect to the third ventricle via the interventricular foramen (foramen of monro), the third and fourth connect via the aqueduct of sylvius. The fourth supplies csf to the subarachnoid space and spinal cord.
