Pressure on the Brain (Part 2)

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Pressure on the Brain (Part 2)

Dynamic pressure measurements allow physicians to characterize and evaluate higher levels of intracranial pressure (ICP) including intracranial hypertension (ICH).

Dynamic Pressure Measurement to Diagnose Increased ICP | Source: ScienceAlert

Figure 1. A dynamic pressure measurement to diagnose increased ICP.
Source: Science Alert.

Maintaining an appropriate cerebral perfusion pressure (CPP) is essential in managing patients with intracranial pathology, including a traumatic brain injury. CPP, which drives oxygen delivery to cerebral tissue, is a function of ICP and the mean systemic arterial pressure (MAP) (blood pressure (BP) measurements). It is calculated by the following equation:


Where MAP = (1/3 systolic BP) + (2/3 diastolic BP)

Normal CPP lies between 60 and 80 mm Hg.

Some of the underlying causes of increased ICP including an infection, high blood pressure, tumor or stroke can be treated to reduce the pressure. However, since increased intracranial pressure is an emergency health concern, additional treatment might include:

      • Medicine to reduce swelling
      • Draining extra cerebrospinal fluid or bleeding around the brain
      • In rare instances, removing part of the skull to ease swelling

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