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Clin Lab Final > Lumbar Puncture > Flashcards

Lumbar Puncture Flashcards

1
Q

Lumbar puncture- needle into the _________ space

A

subarachnoid space

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2
Q

The ___________ is the space in the canal in the spinal column that carries CSF between the brain and the spinal cord

A

subarachnoid space

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3
Q

The spinal column is made up of ____ vertebrae

A

33

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4
Q

The sacrum has ___ small fused vertebrae

A

5

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5
Q

there are ____ coccygeal vertebrae

A

4

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6
Q

The doctor measures the pressure during a lumbar puncture using a special tube called a ___________

A

manometer

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7
Q

LP should ideally only be performed after a __________ exam

A

neurological

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8
Q

Indications for performing CT before LP

A

older than 60
immunocompromised
known CNS lesions

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9
Q

Indication for LP

A

seizure within 1 week of presentation
abnormal level of consciousness
focal findings on neurological exam

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10
Q

Sites of LP

A

L2-L3
L3-L4
L4-L5
whichever is largest

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11
Q

The LP needle should be at a _____________ angle, directing it towards the __________

A

cephalad angle

towards the umbilicus

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12
Q

Normal opening pressure

A
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13
Q

Normal neutrophils

A

0-6%

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14
Q

normal lymphocytes

A

40-80%

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15
Q

Normal monocytes

A

15-45%

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16
Q

Normal protein

A

15-45

17
Q

Normal glucose

A

50-75 or 60-70% blood glucose level

18
Q

Bacterial meningitis, tubercular meningitis, cerebral abscess, subarachnoid bleeding, tumor

A

neutrophils

19
Q

viral, tubercular, fungal, syphilitic meningitis, MS, GB syndrome

A

lymphocytes

20
Q

Parasitic meningitis, allergic reaction to radiopaque dyes

A

Eosinophils

21
Q

tubercular, fungal meningitis, hemorrhage, brain infarction

A

macrophages

22
Q

Diseases directly affecting brain or spinal cord such as CVA is associated with _____ levels

A

LDH

23
Q

Traumatic tap blood will _____

A

clot

24
Q 
Clear, cloudy, purulent 
elevated opening pressure 
WBC >100
low glucose
elevated protein
A

bacterial meningitis

25
Q

WBC 10-1000
glucose >60% blood glucose
elevated protein

A

aseptic viral meningitis

26
Q 
Clear/cloudy
elevated opening pressure 
WBC 10-500
low glucose 
elevated protein
A

fungal meningitis

27
Q 
Clear or opaque
elevated pressure 
WBC 50-500
low glucose
elevated protein
A

tuberculosis

28
Q 
Xanthochromia, bloody or clear 
elevated pressure 
1 additional WBC per 1000 RBC
normal glucose
elevated protein
A

subarachnoid hemorrhage

29
Q

WBC 0-20
normal glucose
mildly elevated protein

A

MS

30
Q

clear or xanthochromia

everything else normal

A

Guillian barre syndrome

Clin Lab Final (4 decks)

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