CSF Flashcards
function of csf
protective fluid, cushioning and lubicating tha brain and spinal column
the brain and spinal cord are enclosed in three layers of the membrane, the _____________
meninges
the outermost membrane, hard mother in Latin
dura mater
the membrane in the middle, spiderweb-like
arachnoid
the innermost membrane, gentle mother
pia mater
this membrane contains sinuses
dura mater
this membrane adheres to the surface of neural tissue
pia mater
where are dural sinuses located?
arachnoid villi
the epithelial cells that line the choroid plexus
choroidal cells
the structures lined by ephitelial cells are called
ependymal cells
ependymal cells include the neural canal and the _________ of the spinal cord
cerebral ventricle
this produces approximately 70% of the CSF
choroid plexuses
produces approximately 30% of the CSF
ependymal lining cells of the ventricles and the subarachnoid space
csf is composed of what
water and water-soluble substances (c02, creatinine, glucose and urea)
volume of csf for adults
90-150 ml
volume of csf for infants
10-60 ml
rate of production of csf
500 ml/day
csf is collected for adults between
l3 and l4
csf is collected in infants betwen
l4 and l5
tube 1 for csf
chemistry and serology
tube 2 for csf
microbiology
tube 3 for csf
hematology (cell count)
tube 4 for csf
additonal
how to preserve tube 1 for csf
freeze
how to preserve tube 2 for csf
room temp
how to preserve csf from tube 3
ref temp
what is hemorrhage
if all tubes colleced show the same degree of blood, no clotting
what is traumatic tap
significant difference in the amount of blood from the 1st and last tube, clotting of CSF
normal color of csf
colorless
what does redish color of csf indicates
presence of rbc, hemorrhage
what does pinkish color of csf indicates
cells hemoglobin, traumatic tap
what does xanthochromic or yellowish csf means
bc of hemoglobin, bilirubin, carotene and melanin
what does carotene in csf indicates
increased serum levels
what does bilirubin in csf indicates
rbc degradation
what does hemoglobin in csf indicates
old hemorrhage
what does melanin in csf indicates
menengeal melanosarcoma
normal turbity of csf
clear
what does turbid csf means
meningitis
what does pellicle means in the turbidity of csf
clotting factors, tubercular meningitis
