Idiopathic intracranial hypertension Flashcards
Risk factors?
obese women of childbearing age.
meds ( retinoids, tetracyclines, growth hormone).
Clinical features?
headache, visual abnormalities (blurry vision, diplopia, vision loss, optic disk edema [enlarged blind spot]), pulsatile tinnitus, palsy of the abducens nerve ( CN VI) ( lateral rectus palsy), papilledema.
diagnosis?
neuroimaging.
lumbar puncture: elevated opening pressure.
treatment?
weight loss.
acetazolamide.
initial evaluation?
complete ocular examination and neuroimaging to exclude secondary causes of intracranial hypertension (ex: mass, hemorrhage). MRI, often with venography to rule out cerebral vein thrombosis, preferred imaging modality, however, CT is generally faster and easier to obtain in emergencies.
After a space occupying lesion is excluded, LP can be performed safely
and indicated to document elevated opening pressure (>250 mm H2O).
cerebrospinal fluids studies ( cell counts)
normal