Neurology Flashcards
List the advantage of MRI head over CT head
List the CIs of MRI
No ionising radiation in MRI
Any metal containing implants / bullets + shrapnel
Claustrophobic
What are the CSF findings seen in MS? (3)
Lymphocytes upto 50
Protein - moderately raised (<1g)
Oligoclonal IgG bands on electrophoresis
List the Irreversible (6) + Reversible (9) RFs for ischaemic stroke
Age/Gender
PMH/FH
Hypercoagulable state / AF
Poor diet / exercise Smoking / alcohol HTN / Hyperchol DM / Obese COC
List some rarer RFs for ischaemic stroke (6)
Endocarditis / Vasculitis
Migraine / Polycythaemia
Antiphospholipid syndrome / Amyloidosis
List some RFs for haemorrhagic stroke (5)
FH Vascular abns (aneurysm / AVM / HHT) Uncontrolled HTN Coagulopathies / anticoags Heavy recent alcohol intake
What are the 3 diff types of cerebral ischaemia
Regional (affects cortical areas)
Lacunar (subcortical - from microinfarcts/small vessel disease)
Global ischaemia (post-arrest: can reverse/transient sx but risk reperfusion injury // severe can cause cortical laminar necrosis = vegetative)
What are the 3 zones in cerebral ischaemia called?
Infarct core - defo will die
Oligaemic periphery - survives from collaterals
Ischaemic penumbra - uncertain outcome
List the main clinical features of an ischaemic stroke (4)
Contralateral mm weakness / hemiplegia Facial weakness Higher dysfunction Visual disturbance Rare - epileptic fit
List some examples of higher dysfunction (6)
Agnosia Asterognosis Receptive aphasia Expressive aphasia Apraxia Inattention (neglect)
Describe the practical management of ?Stroke coming onto the ward
Quick focussed Hx / NIHSS score
Assess for CIs (fam/GP/Notis)
IV access + baselines (FBC, clotting, Glucose, UEs)
Weight (estimate)
Catheterise (if required)
Consultant review + urgent CT / thrombolysis
Post-thrombolysis, what features would indicate complications/haemorrhage?
What aspects of management should be delayed during thrombolysis infusion?
Acute HTN
Severe headache
Nausea/vomiting
-> discontinue infusion + urgent CT
During 1st 24hrs/ during infusion:
Avoid catherisation
Avoid NG
Avoid aspirin
What are the secondary prevention measures post-stroke? (5)
Antihypertensive therapy Statin Antiplatelet therapy Identify/tackle RFs Manage co-morbidities e.g. AF/DM
What are the laws regarding driving after a stroke?
Cannot drive for 4wks post stroke
After 4wks if clinical improvement satisfactory, may return to driving w/o having to inform DVLA
List some post-stroke complications (8)
Post-stroke pain
Incontinence
Pressure sores
Depression
DVT/PE
Aspiration/hydrostatic pneumonia
Malignant MCA syndrome
Seizure
What is malignant MCA syndrome and its features / Tx
Neuro deterioration due to cerebral oedema following middle cerebral aa stroke
Variable but: Increased agitation Reducing GCS Haemodynamic / thermal instability Signs of raised ICP
Decompressive hemicraniectomy
What are some high-risk features of a further stroke post-TIA?
Recurrent TIAs in short period
TIA on anticoag / AF
ABCDD score of ≥4
Age >60
BP at presentation (>140/90)
Clinical features - unilateral weakness (2) / speech disturbance w/o weakness (1)
Duration of Sx - 60mins+ (2) / <60mins (1)
Diabetes - pre-existing (1)
How are high-risk and low-risk TIAs managed?
High-risk: Statin (e.g. simva 40mg) 300mg aspirin (unless CI) Arrange 24hr urgent clinic Advise don't drive until seen specialist
Low risk:
Same but less urgent clinic referral (1wk)
What further Ix / prophylactic interventions can be done after TIAs (1+2)
Carotid USS in specialist clinic
Carotid endarterectomy if stenosed >50%
OR
Percutaneous luminal angioplasty ± stenting
List the RFs for venous sinus thrombosis (7)
Pro-thrombotic state (85%): Pregnancy / puerperium Oral contraceptive Malignancy Genetic thrombophilia
Head injury
Recent LP
Infection
What are the clinical features for cortical (5) / dural (5) / sagittal lateral (5) venous sinus thrombosis
Cortical: Thunderclap headache Fever Focal signs Seizures Encephalopathy
Dural: (ophthal signs + fever) Proptosis/chemosis Ocular pain Ophthalmoplegia Papilloedema Fever
Sagittal lateral: (raised ICP signs) Headache Vomiting Fever Papilloedema Seizures
What are the diff types of intra-cerebral haemorrhage?
Deep intra-cerebral: subcortical
from micro aneurysms (Charcot-Bouchard) and degen of small penetrating aa’s
Lobar intra-cerebral: in cerebral cortex
Normotensive / >60
Describe the immediate management for intra-cerebral haemorrhage
Reverse anticoag
Lower BP to <140/90 within 1hr (IV betolol)
Neurosurgical intervention possibly
What are the presenting features of a SAH? (5 + 3)
Thunderclap headache (after transient HTN) Vomiting Photophobia Drowsiness / coma Focal signs
Neck stiffness
+ve Kernig’s
Papilloedema
What are the predisposing abnormalities causing SAH? (3)
Berry (saccular) aneurysm (70%)
AVM (10%)
No lesion found (20%)