Clinical- 2 Flashcards
What are the 4 contraindications to an LP?
- suspected intracranial mass lesion (causes transtntorial herniation)
- Local infection
- Coagulopathy
- suspected spinal cord mass lesion
What are the 4 indications to do an LP?
- Diagnose crap
- Therapy response in meningitis/other disease
- Administer meds
- Reduce CSF pressure
What types of things can cause an unsuccessful tap?
Obesity, degenerative disease of the spine, spinal surgery, recent LP, dehydration
What happens if u stab an artery on an LP?
RE-DO
What is the post-LP headache?
headache that’s worse hen sitting up, related to the size of the needle rather than the amt of CSF drained
What are EEG’s good for?
Dx of szrs, certain neurological disorders and ALOC
What can EMG’s Dx?
they can detect disorders of the motor units and can indicate the underlying lesion. provide a guide to prognosis
What types of things does nerve conduction studies help Dx?
they confirm the presence and extent of peripheral nerve damage.
True or False: nerve conduction studies can confirm whether sensory Sx are caused by a lesion proximal or distal to the DRG.
TRUE
If a patient presents with mononeuropathy, what can nerve conduction studies also detect?
subclinical involvement of other peripheral nerves
True or False: unfortunately nerve conduction studies cant distinguish between a polyneuropathy and mononeuropathy multiplex.
FALSE
Nerve conduction studies can see what cause of polyneuropathies?
Compression focal neuropathies
In axonal neuropathies, is nerve conduction increased or decreased?
Normal (myelin is A-OK)
In demyelinating diseases, is nerve conduction increased or decreased?
Decreased
What can MRI’s detect in strokes?
If used early-cerebral infarcts
If used for 2-3 days- hematomas
What can CT’s see in strokes?
After 48 hrs, can see hemorrhage
What can MRI’s see for tumors?
Everything. MRI’s are like super good at seeing tumors.
What can CT’s see for tumors?
Can see the tumor but is also good for herniations.
Wen do you use MRI’s for trauma?
Good for follow-ups, but nothing acutely.
What can u use CT’s for trauma?
Good for acute things, like intracranial hemorrhage.
What can MRI’s show for dementia?
Can see abnormal white matter and atrophy
What can CT’s see for dementia?
Nothing really. CT’s suck harder for dementia than a cheap hooker using a vacuum.
What can MRI’s see for MS?
Detect demyelinating lesions in the white matter or spinal cord.
Gadolinium MRI shows lesions of different ages.
What can CT’s show for MS?
NOTHING. GOD CT IS HORRIBLE (except trauma)
What can MRI’s show for infections?
White matter edema, focal areas of cerebritis and abscess formation.
What can CT’s see for infections?
NOT MUCH OMG CT’S WTF
