Intracranial pressure and Head Trauma

Posted by e-Medical PPT Tuesday, June 29, 2010
Intracranial pressure is the pressure in the cranium and thus in the brain tissue and cerebrospinal fluid (CSF); this pressure is exerted on the brain's intracranial blood circulation vessels. ICP is maintained in a tight normal range dynamically, through the production and absorption of CSF and pulsates approximately 1mm Hg in a normal healthy adult.CSF pressure has been shown to be influenced by abrupt changes in intrathoracic pressure during coughing , valsalva maneuver, and communication with the vasculature.
Intracranial hypertension,is elevation of the pressure in the cranium. ICP is normally 0–10 mm Hg; at 20–25 mm Hg, the upper limit of normal, treatment to reduce ICP is needed.The pressure-volume relationship between ICP, volume of CSF, blood, and brain tissue, and cerebral perfusion pressureis known as the Monro-Kellie doctrine or the Monro-Kellie hypothesis.The Monro-Kellie hypothesis states that the cranial compartment is incompressible, and the volume inside the cranium is a fixed volume. The cranium and its constituents (blood, CSF, and brain tissue) create a state of volume equilibrium, such that any increase in volume of one of the cranial constituents must be compensated by a decrease in volume of another.

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1 Response to Intracranial pressure and Head Trauma

  1. Jay Says:
  2. If you wish to become a doctor and deal with head trauma we suggest you prepare for your premed UMAT exams with http://umat.eglobalmed.com and your premed GAMSAT exams with http://gamsat.eglobalmed.com

     

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