Short clinical consultations Flashcards
(366 cards)
Management of migraine?
Acute phase: paracetamol / NSAID + antiemetic (1st line). Sumatriptan (oral / intranasal / subcut)
Longer term: remove triggers, exercise, sleep hygiene, decrease caffeine.
Prophylaxis = topiramate, propranolol
Avoid opiates / analgesia overuse
Typical migraine history?
Unilateral
Throbbing in nature
Light aversion / phonophobia
Aura / scintillating scotoma
Triggers: behaviours / foods
Onset: acute onset, can last days
Similar episodes in the past
Headache red flags to identify in the history
Vascular: maximal intensity 1-2 mins, ‘thunderclap’ headache (SAH)
Infective: pyrexial, confused, unwell, meningism, photophobia
SOL: insidious headache onset, worse on bending over / coughing / mornings
Posterior fossa syndrome: incoordination, truncal ataxia, nystagmus
Nausea / vomiting, visual changes, focal neurological deficit
Presentation with 1st headache over 55y
Approach to fundoscopic exam?
‘ROVM’
- Red reflex - obscured in cataracts, corneal scars, vitrous haemorrhage
- Optic disc - looking for cup, colour and contour. Normal cup : disc ratio is 0.3
- Vessels - start at disc, follow vessels to all 4 quadrants, ask patient to look up, down, left and right
- Macula - temporal to disc, use green light for foveal reflex
Fundoscopy features: glaucoma
Large cup : disc ratio (>0.5) indicating cupping of disc
Superior polar notching
Nasal displacement of central blood vessels
Fundoscopy features: papilloedema
Disc margins are obscured, swollen and hyperaemic
Retinal vessels are tortuous
NB must rule out SOL, signs of increased ICP
Fundoscopy features: optic atrophy with macular scarring
Optic disc pallor with cupping
Large area of macular scarring
ARMD = most common cause of macular scarring
Fundoscopy appearances: dry age-related macular degeneration
Atrophy of retinal pigment in central macula
Drusen in macular area
NB presence of haemorrhages + oedema in macular area suggests wet macular degeneration
Fundoscopy appearances: hypertensive retinopathy grades 1-4
Grade 1: arteriolar narrowing
Grade 2: AV nipping
Grade 3: exudates, haemorrhages, cotton wool spots
Grade 4: papilloedema
NB no microaneurysms! only present in diabetic retinopathy.
Fundoscopy appearances: retinitis pigmentosa
Multiple bony spicule, retinal black pigmentations scattered in the periphery of the retina
Associated history of poor night vision / blindness
Positive FH
Reduced visual fields / tunnel vision
Fundoscopy appearances: central retinal vein occlusion (CRVO)
‘Stormy sunset’: engorged retinal vein with retinal haemorrhages
Fundoscopy appearances: central retinal artery occlusion (CRAO)
Central ‘cherry red spot’ with surrounding pale retina (due to choroidal blood supply to macula remains intact)
Attenuation of arteries + veins
Fundoscopy appearances: branch retinal vein occlusion
Tortuosity and dilatation of branch of central retinal vein with AV nipping
Multiple retinal haemorrhages
Microaneurysms + hard exudates
NB must exclude hyperviscosity!
Fundoscopy appearances: background diabetic retinopathy / maculopathy
Blot haemorrhages
Hard exudates
Microaneurysms
Circinate exudates
Fundoscopy appearances: pre-proliferative diabetic retinopathy
Retinal ischaemia = characteristic here
- Multiple dot + blot haemorrhages
- Cotton wool spots (ischaemic areas)
- IRMA: intra-retinal microvascular abnormalities
- New vessel formation on the disc
Fundoscopy appearances: proliferative diabetic retinopathy
New vessels on the disc (first sign) and elsewhere
Haemorrhages
Hard exudates
NB can get ‘myopic crescent’ at the edge of the disc with peripheral retinal pigment layer prominence (don’t confuse with retinitis pigmentosa!)
Fundoscopy appearances: pan-retinal laser photocoagulation
Multiple laser scars with areas of hyperpigmentation
Patient will likely have reduced peripheral vision and a degree of night blindness
Fundoscopy appearances: multiple retinal haemorrhages
Seen in both deep and superficial layers of the retina
Hyperviscosity states (polycythaemia, waldenstrom’s macroglobulinaemia, myeloma) can lead to this
Fundoscopy appearances: retinal detachment
Area of bullous retina showing area of elevation with fluid
Trauma or choroidal metastasis
Painless ‘curtain coming down’ over vision
Discussion: what is retinitis pigmentosa?
Inherited form of retinal degeneration characterised by loss of photoreceptors
Inherited via autosomal recessive or x-linked pattern
Loss of night vision and peripheral vision
Progressive condition: by the time patients are middle-aged they reach criteria to be registered as blind
Driving implications: pt needs to inform DVLA about diagnosis, DVLA have rules about best corrective acuity + visual field loss
Syndromes that include retinitis pigmentosa and other features to look for to identify them?
RP and..
Ataxic: Freidreich’s ataxia, abetalipoproteinaemia, Refsum’s disease, Kearns-Sayre syndrome
Deafness: Refsum’s disease, Kearns-Sayre, Usher’s disease
Ophthalmoplegia + ptosis + pacemaker: Kearns-Sayre
Polydactyly: Laurence-Moon-Biedl
Ichthyosis: Refsum’s disease
Ddx of fundoscopic appearances of retinitis pigmentosa?
Diabetic retinopathy
Laser treatment scars
Infections: toxoplasmosis, rubella
Conditions associated with retinitis pigmentosa?
Laurence-Moon-Biedl syndrome
Usher syndrome
Alstrom syndrome
Refsum disease
Kearns-Sayre syndrome
Ddx of bilateral visual loss?
Glaucoma
Cataracts
Diabetic retinopathy
Macular degeneration
Papilloedema
Leber’s optic neuropathy (rarer)