Thyroid & Adrenal
The gold standard investigation for increased intracranial pressure
|A||Intraventricular catheter monitoring|
a. In general ventriculostomy is preferable to ICT monitoring devices that are placed in the brain parenchyma because ventriculostomy allows CSF drainage as a method of treating elevated ICT.
b. However, parenchymal monitoring of ICP is most appropriate for patients with diffuse edema and small ventricles (which may make ventriculostomy placement more difficult) or any degree of coagulopathy, in which ventriculostomy carries a higher risk of hemorrhagic complications.
a. Choroid plexus accounts for 50-70% of CSF formation Volume of CSF -150 ml
b. The rate of formation - 550 ml/day
c. Turnover rate - 3 times/day (approximate)
d. Ion with maximum CSF:Plasma ratio = Magnesium
e. Minimum CSF: Plasma ratio = Cholesetrol and proteins