CSF Circulation Disorders Flashcards
What is the upper limit of normal of CSF pressure?
15mm Hg or 20cm CSF
How much CSF is produced each day?
500ml
What drug reduces the production of CSF?
Acetazolamide
Where does CSF absorption take place?
Arachnoid granulations
Give some functions of CSF
Brain buoyancy
Provides nutrition
Clears waste products
Give some signs of hydrocephalus seen at birth
Unusually large head
Thin/shiny scalp
Bulging fontanelle
Downward looking eyes
What imaging can be done to look for congenital hydrocephalus?
Antenatal ultrasound
What is the main treatment for hydrocephalus?
Ventriculoperitoneal shunting
Give some complications of shunting
Overdrainage
Underdrainage
Infection
Seizures
Give some symptoms of a blocked shunt
Headache and vomiting Sunset eyes (kids) No upgaze (adults)
What should be done in the event of a blocked shunt?
CT head
Surgery - shunt replacement
What is an alternative treatment to shunting in hydrocephalus?
Endoscopic ventriculostomy (ETV)
What is the main advantage of ETV over shunting?
Less likely to need replaced
What occurs in normal pressure hydrocephalus?
Enlarged cerebral ventricles with normal ICP
What triad of symptoms is seen in normal pressure hydrocephalus?
Ataxia (shuffling/broad-based gait)
Memory decline
Incontinence