Lumbar Puncture
is a procedure by which CSF is taken out from the
subacacbooid space.
Normally, CSF is drawn by introducing a needle between the 3rd and the 4th lumbar vertebrae.
Histological and biochemical study of CSF gives an indication about
various disease processes affecting the CNS.
CSF changes in common disorders
Pressure
is increased in:
- subarachnoid hemorrhage,
- acute bacterial meningitis, and
- tuberculous meningitis.
Color
is blood stained in:
subarachnoid hemorrhage
cloudy in:
- acute bacterial meningitis and
- tuberculous meningitis.
RBC:
is increased in:
subarachnoid hemorrhage.
Glucose:
is decreased in
- acute bacterial meningitis and
- tuberculous meningitis.
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subarachnoid hemorrhage
- pressure incr
- RBC incr
- colour is blood stained
acute bacterial meningitis
- pressure incr
- glucose decr
- color is cloudy
tuberculous meningitis
- pressure incr
- proteins incr
- glucose decr
- color is cloudy
Proteins:
are increased in
- subarachnoid hemorrhage,
- acute bacterial meningitis,
- viral meningitis,
- multiple sclerosis, and
- tuberculous meningitis
Microorganisms:
They are demonstrated in
infective meningitis.
viral menigitis
- proteins incr
infective meningitis.
- microorganisms demostrated
multiple sclerosis
- proteins incr