Neuro Core Conditions Flashcards

1
Q

3rd most common cause of death?

A

Stroke

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2
Q

What % of strokes are ischaemic?

A

70%

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3
Q

Who has strokes?

A

> 40
M>F
Asian and Black African populations

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4
Q

Mortality following stroke?

A

20-25%

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5
Q

Causes of stoke in young patients?

A
Thrombophilias 
Vasculitis 
SAH
Venous sinus thrombosis 
Carotid artery dissection
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6
Q

Causes of stroke in older people?

A

Thrombus in situ
Athero-thromboembolism (AF, infective endocarditis, MI)
CNS bleed
Sudden BP drop (>40mmHg)
Vasculitis (giant cell arteritis, venous sinus thrombosis)

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7
Q

Risk factors for stroke?

A
>65
FHx
Ethnicity 
Hx
HTN
Smoking 
Obesity 
DM 
Heart disease 
Peripheral vascular disease 
Polycythaemia vera 
Carotid artery occlusion 
Hyperlipidaemia 
Excess alcohol 
Clotting disorders 
COCP
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8
Q

Symptoms of stroke?

A

FAST
Cerebral hemisphere infarcts –> contralateral hemiplegia, sensory loss, homonymous hemianopia , dysphasia
Brainstem infarct –> quadriplegia, disturbed gaze/vision, locked in syndrome, lateral medullary syndrome
Lacunar infarcts –> pure motor/sensory or mixed signs, ataxia, dysphagia

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9
Q

Differentials for stroke?

A
CNS tumour 
Sub/epidural haematoma 
SAH
Todd's palsy 
Drug OD 
ACS
Bell's palsy 
BPPV 
Brain abscess 
Inner ear labrinthytis 
MI 
TIA
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10
Q

Investigations for stroke?

A
FBC, ESR, BM, lipid profile
CXR + ECG for heart disease
CTH if GCS<13
Carotid duplex US 
MRI in some cases
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11
Q

Treatment for stroke?

A

Restore O2 and get blood glucose between 4-11
If patient has HTN emergency with encephalopathy/nephropathy/HF/MI/aortic dissection/(pre) eclampsia/ICH then give antihypertensives
Aspirin, clopidogrel
Alteplase (thrombolytic)
IC stenting
Surgery for supratentorial haemorrhage with mass effect, posterior fossa or cerebellar haematoma

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12
Q

Who gets TIA?

A

Rare <60
Uncontrolled HTN
M>F
Asian and black African populations

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13
Q

What % of stroke patients have a TIA first?

A

15%

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14
Q

Causes of TIA?

A
Embolic (usually) from carotid bifurcation, heart (AF)
Thrombotic 
Haemorrhagic (rarely)
Atherosclerosis 
Leukaemia 
Sickle cell 
Polycythaemia 
Thrombosysthaemia
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15
Q

Risk factors for TIA?

A
>65
FHx
Hx
HTN
DM
Obese
Smoking/alcohol
Ethnicity 
Heart/peripheral vasc disease
Polycythemia vera 
Carotid artery occlusion 
COCP
Hyperlipiaemia 
Clotting disorders
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16
Q

Symptoms of TIA due to carotid clot?

A
Unilateral, motor weakness 
Dysarthria 
Amaurosis fugax 
Aphasia 
Hemiparaesis 
Hemisensory loss
Hemianopic vision
B/W dysphasia
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17
Q

Symptoms of a vertibrobasilar TIA?

A
Diplopia 
Vertigo 
Vomiting 
Choking 
Dysarthria 
Ataxia 
Hemisensory loss 
Hemianopic vison 
Tetraparaesis
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18
Q

How long must a TIA take to resolve?

A

24 hours

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19
Q

Differentials for TIA?

A
Stroke 
IC lesion 
Todd's 
Syncope due to arrhythmias
Temporal arteritis
Migraine
Retinal or vitreous haemorrhage 
Focal epileptic seizure 
Labrynthine  disorders 
Psych disorder 
Metabolic disturbance
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20
Q

Investigations for TIA?

A
Urinalysis for glucose 
FBC, ESR, U+E, fasting lipids and glucose, LFTs, TFTs
ECG 
Cardiac monitoring for paroxysmal AF 
Carotid/vertebral doppler 
CT/MRI
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21
Q

Treatment for TIA?

A
No driving for 1 month 
Admit to hospital if:
On warfarin (CTH)
ABCD2 score >4
Uncontrolled AF 

Antiplatelet + anticoag
Warfarin for AF

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22
Q

What % of strokes are due to SAH?

A

5%

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23
Q

Who gets SAH?

A

Younger patients (50)
50% die
F>M
Rare in children

24
Q

Causes of SAH?

A

Saccular berry aneurysm (70%)
AVM (10%)
No arterial lesion found (15%)
Rare associations (5%) - bleeding disorders, mycotic aneurysms from endocarditis, acute bacterial meningitis, tumours

25
Risk factors for SAH?
``` Large aneurysms Smoking HTN Alcohol Genetics 10% of AD PCK patients have berry aneurysms ```
26
Symptoms of SAH?
``` Sudden thunderclap headache Vomiting Sentinel bleeds Expansion of aneurysm Dizzy Orbital pain Diplopia Visual loss Sensory/motor disturbances Seizures Ptosis Bruits Dysphasia Neck stiffness Focal neuro signs Complete/partial CNIII palsy (due to PCmmA rupture) ```
27
Differentials for SAH?
``` Meningitis Trauma Cluster headahce Encephalitis First seizure in adulthood IC haemorrhage Ischaemic stroke TIA ```
28
Investigations for SAH?
ABG ECG CTH and CT angio -ve CTH = LP (use spectrophotometry to detect xanthochromia)
29
Treatment for SAH?
``` Prevent further bleeding Nimodipine Ca antagonists (reduce vascular spasm) Phenytoin (prevent seizure spread) Nitroprusside (vasodilator) Labetolol Clip aneurysm Endovascular embolisation Secondary prevention advice ```
30
What % of those with DM for >25 years have peripheral neuropathy?
50%
31
Who gets peripheral neuropathy?
Older patients
32
Causes of peripheral neuropathy?
``` DM B12/folate def Chemo Antiretrovirals Metrodinazole Thalidomide Phenytoin Insecticides Solvents Cancer Alcohol CKD Guillan-Barre syndrome Trauma and nerve compression Shingles HIV Lyme RhA Sjorgens SLE Sarcoidosis Coeliac Charcot Marie Tooth syndrome Freidriech ataxia Idiopathic ```
33
Risk factors for periph neuropathy?
``` Alcohol DM Kidney/liver/thyroid disease Repetitive physical stress Age FHx HTN Peripheral vascular disease Smoking ```
34
Symptoms of peripheral neuropathy?
``` Tingling, numbness Loss of coordination Burning/shooting pains (worse at night) Dificulty walking/picking stuff up Affects hands/feet first Muscle weakness Falling Difficulties with small movements (buttoning shirts) Swallowing problems Cachexia Muscle twitching/cramps/paralysis Dizzy/fainting Reduced sweating Heat intolerance Urinary incontinence Bloating Constipation/diarrhoea Impotence ```
35
Differentials for peripheral neuropathy?
``` Acromegaly Acute inflam demyelinating polyadiculoneuropathy Alcohol related neuropath CMT disease Coagulopathies Drug induced paraneoplastic syndromes Heavy metal toxicity Herpes Labert-Eaton myasthenic syndrome MG Nerve compression Post-surgical vagotomy Vit B6 intox ```
36
Investigations for peripheral neuropathy?
``` BM, vit B12, foalte, U+E creatinine Nerve conduction studies Electromyography Nerve/skin biopsy ```
37
Treatment for peripheral neuropathy?
``` Underlying cause Physio Surgery Anticonvulsants (gabapentin, carbamazepine) Elastic stockings Fludrocortisone Eating small frequent meals Sleeping with head raised Walking aids Occupational therapy ```
38
Who has epilepsy/seizures?
Children or >60 Learning difficulties 30% have a 1st degree relative affected
39
Causes of seizures?
``` Primarily idiopathic Ischaemia Venous thrombosis Head injury Meningitis/encephalitis Provoked seizures Autoimmune Brain tumour Isoniazid Alcohol (withdrawal) Hypoglycaemia Imbalanced Na or Ca ```
40
Risk factors for seizures?
``` Age M>F FHx Head trauma Stroke Brain infections Prolonged febrile seizures of childhood Congen abnormalities of brain structure Lack of O2 to brain CP Illicit drugs ```
41
Symptoms of seizures?
``` Amnesia Falls Tonic-clonic Blank spells Incontinence Confusion/impaired awareness Visual/auditory/gustatory/olfactory hallucinations ```
42
Differentials for seizures?
``` Syncope Arrhythmias TIA Migraine BPPV Hypoglycaemia Acute encephalopathy Narcolepsy Sleep apnoea Panic attacks ```
43
Investigations for seizures?
``` EEG MRI/CTH BM, U+E, Ca, LFTs, FBC 12 lead ECG Neurophysiological assessment ```
44
Treatment for seizures?
Phenytoin Carbamazepine Na valproate Broad spectrum AEDs may work for treatment resistant epilepsy Drug treatment should be monitored and weaned off Relaxation and CBT may help
45
Which is more common, viral or bacterial meningitis?
Viral
46
Who gets meningitis?
Babies Young children Elderly Can be anyone
47
Causes of meningitis for neonates?
``` Group B strep Listeria monocytogenes E coli H Flu B N Meningitis Strep pneumoniae ```
48
Causes of meningitis for adults?
``` S pneumoniae H flu type B N meningitidis Gram -ve bacilla Staph Strep L Monocytogenese ```
49
Causes of meningitis for elderly or immunocompromised?
S Pneumoniae L monocytogenes TB Gram -ve
50
Risk factors for meningitis?
``` CSF shunts Dural defects Spinal procedures Bacterial endocarditis DM Alcohol Prem birth PROM IVDU Malignancy Thalassaemia, sickle cell, splenectomy CF ```
51
Symptoms of meningitis?
``` Meningitism Fever Headache Altered mental state Shock Septicaemia Kernig's sign Brudzinski's sign PAresis Focal neuro def Seizures Viral may be more mild ```
52
Symptoms of meningitis in neonates?
``` Non-specific Resp distress Fever Apnoea Bradycardia Hypotension Difficulty feeding Irritable ```
53
Differentials for meningitis?
``` Other causes of infection/pyrexia IC abscess Encephalitis SAH Tumours Delirium tremens HSV Paediatric febrile seizures ```
54
Investigations for meningitis?
LP (unless at risk of herniation - then CTH) Gram stain, Ziehl-Neelson, cytology, virology, glucose, protein, culture, rapid antigen testing, PCR, Indian ink (cryptococci) Blood cultures, FBC, BM, coag, U+E Urine dip/culture MRI
55
General teatment for meningitis?
Fluids Antipyrexics Antiemetics
56
Treatment for viral meningitis?
Analgesia Aciclovir if due to herpes Ganciclovir if due to CMV (only if congenital or AIDS related as ganciclovir is v toxic)
57
Treatment for bacterial meningitis?
Benzylpenicillin STAT if suspicion of meningococcal + non-blanching rash Blind therapy initially (3rd gen ceph or amoxicillin if listeriosis is suspected) Meningococcal - benzylpenicillin or cefotaxime for at least 7 days, rifampicin for 2 days to eliminate nasal carraige Pneumococci - Cefotaxime for 10-14 days H flu type B - Cefotaxime (10 days) + rif 4 days prior to discharge Group B strep - Benzylpenicillin + gentamicin or cefotaxime alone for 14 days Listeriosis - Amoxicillin and gentamicin for 10-24 days