- consistent relationship between cerebral blood flow and intracranial pressure is difficult to demonstrate until levels of 40-50 mm Hg are
- well-engineered intracranial-pressure transducers can easily be inserted by the neurosurgeon in the emergency room;
- use subdural rather than an intraventricular placement (which could reduce intracranial pressure through drainage of CSF to avoid the
danger of ventricular collapse & displacement;
- normal intracranial pressure ranges from 5-15 mm Hg (0.7 - 2 kPa);
- when it rises to 20 mm Hg (2.7 kPa) or more, active therapy should be undertaken to reduce it;
- intracranial pressure is subtracted from the mean arterial blood pressure to obtain the cerebral perfusion pressure;
- this pressure must be above 70 mm Hg (9.3 kPa) to provide adequate oxygen to a severely injured brain
Contribution of increased cerebral blood volume to posttraumatic intracranial hypertension.
Original Text by Clifford R. Wheeless, III, MD.
Last updated by Data Trace Staff on Thursday, May 24, 2012 12:24 pm