Cerebrospinal Fluid and Amniotic Fluid Flashcards
- Supply nutrients to the nervous system
- Remove metabolic waste
- Produce a mechanical barrier to cushion the
brain & spinal cord against trauma
Cerebrospinal Fluid
● Outermost layer of meninges
● It lines the skull and vertebral can
Dura Mater
● Middle layer
● Spider-like or web-like structure
Arachnoid
. Pia Mater
● Literally means “tender” mother
● Innermost layer
● Lines the surface of the brain and spinal cord
Filter the plasma, sensitizing or producing CSF
Responsible for CSF product
Composed of tight junctions of endothelial
cells which makes up the Blood Brain B
CHOROID PLEX
Tight-fitting endothelial cells.
Prevents passage of many molecules, basically it will protect the brain from toxin, infections and other substances that can harm the brain
Blood Brain Barrier
Maintain the rate of poductin othe CSF
Reabsorb the circulatingCS ba to the peripheral circulation.The rate of reabsorption is also 0mL.Thrate of
production of choroid lexus isequ to the reabsorption of arachnoid villi
Arachnoid Villi/Granulations
Spinal tap
Needle inserted between 3rd and 4th vertebra or between 4th and 5th vertebra
Lumbar Puncture
Suboccipital
Directly below the occipital bone
More dangerous because it’s near the brain stem
Suboccipital
Directly below the occipital bone
More dangerous because it’s near the brain stem
CISTERNAL PUNCTURE
90-150 mL
Adults
10-60mL
Neonates
WBCs >200 /uL
RBC >400/uL
Microorganisms
Proteins, Lipids
Hazy/Turbid/Milk
y/
Cloudy
Due presence of RBC
degradation products
Pink- slight amount of Oxyhemoglobin (O2Hgb)
Orange- heavy hemolysis
Yellow - due to convertion of oxyhemoglobin
Xantochromia (abnormal
discoloration of
CSF)
