1.1 Cerebrospinal fluid (Specimen considerations)

Question 1

The 3rd major fluid of the body

Answer 1

CSF

Question 2

CSF is characterized as an ___________ ultrafiltrate of plasma

Answer 2

Imperfect

Question 3

CSF is not solely produce on plasma ultrafiltration since ___% comes from plasma while ___% comes from lining of choroid plexuses

Answer 3

70%

30%

Question 4

CSF is an imperfect ultrafiltrate due to _________ which some substances cannot move through that barrier

Answer 4

Blood brain barrier

Question 5

The recommended technique in collecting CSF is?

Answer 5

Lumbar/Spinal tap

Question 6

Volume collected for CSF? and is distributed on how many tubes?

Answer 6

up to 20mL that is distributed 3-4 tubes

Question 7

What part of the spine is CSF being collected?

Answer 7

between L3 and L4 or L4 or L5

Question 8

All specimen in CSF must be tested within?

Answer 8

1 hr

Question 9

Order of draw for CSF base on tube

Answer 9

Tube
1: Chemistry and immunology
2: Microbiology
3: Hematology
4. Additional tests

Question 10

Storage for Tube 1?

Answer 10

Frozen

Question 11

Storage for Tube 2?

Answer 11

Room temp

Question 12

Storage for Tube 3?

Answer 12

Ref temp

Question 13

Storage for Tube 4 ?

Answer 13

Depends