MRCP2 Flashcards
(340 cards)
What are the side effects of 5HT3 antagonists?
prolonged QT interval
constipation is common
Where does ondansetron act?
Medulla oblongata - chemoreceptors
What is the other name for petit mal seizure?
Abscence
EEG: bilateral, symmetrical 3Hz spike and wave pattern~?
Abscence seizure ?
Features of abscence seizure?
absences last a few seconds and are associated with a quick recovery
seizures may be provoked by hyperventilation or stress
the child is usually unaware of the seizure
they may occur many times a day
EEG: bilateral, symmetrical 3Hz spike and wave pattern
Management of abscence seizure?
Sodium valoprate
Ethuoxomide
Risk factors of acute angle closure glaucoma?
hypermetropia (long-sightedness)
pupillary dilatation
lens growth associated with age
Features of acute angle closure glaucoma?
Severe pain: may be ocular or headache
decreased visual acuity
symptoms worse with mydriasis (e.g. watching TV in a dark room)
hard, red-eye
haloes around lights
semi-dilated non-reacting pupil
corneal oedema results in dull or hazy cornea
systemic upset may be seen, such as nausea and vomiting and even abdominal pain
Investigations of acvute angle closure glaucoma?
- Tonometry
- Gonioscopy - looks at the angle
Management of acute angle closure glaucoma?
Combination of eye drops:
- Pilocarpine
- Beta blocker
- Alpha 2 agonist
In addition:
- Acetazolamide
Definitive management of acute angle closure glaucoma?
laser peripheral iridotomy
Glaucoma: How does pilocarpine work?
Stimulates parasympathetic
Glaucoma: How does beta blocker work?
Descreases aqueous humour
Glaucoma: How does alpha 2 agonist work?
Decreases aqueous humour
+
Increases outflow
What is acute disseminated myelitis ?
autoimmune demyelinating disease of the central nervous system
Management of acute sinusitis?
- Analgesia
- Intranasal decongestants if present for 10 days
- Phenoxymethapenicillin if very unwell
What is double sickening in acute sinusitis?
‘double-sickening’ may sometimes be seen, where an initial viral sinusitis worsens due to secondary bacterial infection
What is an acute stress reaction?
First 4 weeks post traumatic event
Features of acute stress reaction?
intrusive thoughts e.g. flashbacks, nightmares
dissociation e.g. ‘being in a daze’, time slowing
negative mood
avoidance
arousal e.g. hypervigilance, sleep disturbance
Management for acute stress reaction?
trauma-focused cognitive-behavioural therapy (CBT)
BZD
Features of dry macular degeneraiton?
characterised by drusen - yellow round spots in Bruch’s membrane
Features of wet macular degeneration?
exudative or neovascular macular degeneration
characterised by choroidal neovascularisation
leakage of serous fluid and blood can subsequently result in a rapid loss of vision
carries the worst prognosis
Features of macular degeneration?
reduction in visual acuity, particularly for near field objects
- gradual in dry ARMD
- subacute in wet ARMD
difficulties in dark adaptation. Worsening night vision
photopsia, (a perception of flickering or flashing lights), and glare around objects
Signs of macular degeneration?
distortion of line perception may be noted on Amsler grid testing
fundoscopy reveals the presence of drusen, yellow areas of pigment deposition in the macular area, which may become confluent in late disease to form a macular scar.
in wet ARMD well demarcated red patches may be seen which represent intra-retinal or sub-retinal fluid leakage or haemorrhage.