Neurological emergencies Flashcards

1
Q

What do you need to check in a ABDEG examination?

A
Airways
Breathing
Circulation
Deficit
Environment - no hyper/hypothermia
Glucose
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Name 3 examples of neurological emergencies

A
Coma - sudden state of unconsciousness
Sudden or subacute new headache
Weakness
- Generalised +/- resp failure
- Acute/subacute paraplegia/quadriplegia
- Acute hemi or monoplegia
Visual loss
Status epilepticus
Other (acute loss of bladder function, hemiballismus, status dystonicus, severe chorea, severe dysphasia, acute dysphagia)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What does unconscious mean?

A

Unarousable

Not aware

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How is coma measured?

A

GCS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What does GCS measure?

A

Response of eyes, motor, and verbal to stimuli

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is eye opening assessed as?

A

None
To pain
To voice
Spontaneously

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is motor response assessed as?

A
None
Extension to pain
Flexion to pain
Withdrawal from painful stimuli
Localises to pain
Obeys commands
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is verbal response assessed as?

A
None
Groans
Inappropriate words
Confused speech
Orientated
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are the common causes of coma?

A
Drugs/toxins (opiates, alcohol)
Anoxia post arrest
Mass lesions (bleeds)
Head injury
Infections (HSE, bacterial meningitis)
Infarcts (brainstem)
Metabolic (hypoglycaemia, DKA, hepatic encephalopathy, uraemia, Wernicke's)
SAH
Epilepsy
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the uncommon causes of coma?

A
Mass lesions (tumours)
Venous sinus occlusions
Hypothermia
Psychiatric (catatonia)
Toxins (CO)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the rare causes of coma?

A

Pituitary apoplexy

Fat embolism

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What questions should you ask in the history of an unconscious patient?

A

Circumstances of event from witnesses
Previous events, suicide notes, travel Hx
PMH - general, psychiatric, head injury, alcohol
Drug - insulin, antiepileptics, antidepressants, benzos, recreational

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What should you do in the examination of an unconscious patient?

A

Trauma, skull, fever, hypothermia, breath odour, needle marks, stigmata liver disease, evidence of convulsion, alert bracelet, skin colour
Assessment of GCS
Brainstem signs - pupil size, pupil reactions, eye movements, corneal reflexes
Focal deficits - asymmetry of motor function, tendon reflexes, plantars, meningism

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What investigations should you do on an unconscious patient?

A
Bloods - glucose, U&E, Ca, phosphate, LFT, toxicology, alcohol level, arterial gases, anion gap, ECG
Imaging - CT/MRI
LP
EEG
Rarely cortisol, TFTs, ammonia
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is status epilepticus?

A
30 mins or more
Continuous
Intermittent attacks without recovery of consciousness
Practically > 10 mins
5 mins generalised tonic-clonic
10 mins focal
10-15 absence
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How common is status epilepticus?

A

20% cases fatal

Long-term mortality rate 22% in children, 57% adults

17
Q

What are the consequences of status epilepticus?

A
Increased CNS metabolic consumption
Rhabdomyolysis
Renal failure
Metabolic acidosis
Hyperthermia
Heart and other organ effects
18
Q

How do you treat status epilepticus?

A

IV lorazepam/diazepam/clonaazepam
Inform neurointerventivist or experienced anaesthetist
Antiepileptics - phenytoin, levetiracetam, valproate, phenobarbital
General anaesthesia with intubation and ventilation

19
Q

What are the harmless causes of sudden onset severe headaches?

A

Migraine

Cluster headache

20
Q

What are the serious causes of sudden onset severe headaches?

A
SAH
Cerebral venous sinus thrombosis
Dissection - carotid/vertebral
Infection - bacterial meningitis/encephalitis/cerebral abscess
Acute haemorrhage/acute infarcts
Pituitary apoplexy
21
Q

What causes a spontaneous SAH?

A

Rupture of berry aneurysm

22
Q

How does SAH present?

A

Acute severe localised headache
Meningism - N&V, stiff neck, photophobia
Double vision, droopy eyelid
Sometimes - seizure, low GCS, sudden death
Can take up to an hour from mild headache to worst ever headache

23
Q

What might the examination in a SAH look like?

A

Normal or reduced GCS
Subhyaloid haemorrhage
3rd CN palsy - with sudden onset headache SAH until proven otherwise
Bilateral extensor plantar response
Severe meningism - pain on eye movement, neck stiffness
Focal neurological deficit due to mass effect of secondary vasospasm and cerebral ischaemia

24
Q

What investigations should you do in SAH?

A

CT within 6 hrs
CT angiogram or MRI/MRI angiogram
LP 12 hrs post event
Catheter angiogram

25
Q

What is GBS?

A

Acute/subacute

Demyelinating immune mediated multifocal polyradioculo-neuritis

26
Q

What are the clinical features of GBS?

A
Numbness starting distally
Progressive ascending weakness
Bifacial weakness + other cranial neuropathies
Flaccid tetra/paraparesis
Areflexia
27
Q

What can mimic GBS?

A

Spinal shock syndrome 2ndary to cord compression
Botulism
MG
Lyme disease
Toxins - thallium, lead, hexane
Metabolic - porphyria
Neoplasia - multifocal carcinomatous/lymphomatous meningitis

28
Q

How do you diagnosed GBS?

A

CSF - elevated protein, fewer < 3 or no cells

EMG - slower nerve conduction velocities

29
Q

What are the dangers with GBS?

A
Failure to recognise
- Severe weakness
- Aspiration
- Resp failure
- Autonomic instability - severe sudden hypotension, cardiac arrhythmias
May cause death
30
Q

What is the management of GBS?

A
Always admit
Let ITU know early if vital capacity <1L - ITU care or sniff pressures, counting in one breath
DVT prophylaxis
BP
ECG
Monitor swallowing
31
Q

How do you treat GBS?

A
IVIG
- 2g/kg total dose
- Split over 5 days
Plasma exchange
- Equally effective compared to IVIG
- Less available
- More cumbersome
- Alternative days for 5-7 exchanges