Make a Medic - Medicine & Surgery Flashcards
(341 cards)
What is PRES? Where does it affect? Common causes?
Posterior Reversible Encephalopathy Syndrome (PRES) is a constellation of symptoms that results in oedema of the posterior occipital and parietal lobes.
Manifestations include headache, changes in vision, confusion and seizures.
It can be caused by severe hypertension, and it should resolve once the blood pressure is under control.
Initial management of acute HF
Sitting the patient upright, administering high flow oxygen and offloading the fluid with IV diuretics (usually furosemide 40-80 mg)
Management of Furosemide resistant HF. How may this present on an ABG?
Non-invasive ventilation. T1RF
What type of NIV is useful for each type of respiratory failure? Why?
T1RF - CPAP - CPAP is to splint open collapsed airways, thereby recruiting more alveoli for oxygenation. It is appropriate for type I respiratory failure when poor oxygenation is the main issue.
T2RF - BiPAP - BiPAP is useful for both oxygenation of the blood and removing carbon dioxide, so it is a useful treatment for type II respiratory failure.
Where are venous ulcers typically found?
gaiter region of the leg
Characteristics of venous ulcers
shallow, relatively painless with irregular boundaries and a wet sloughy appearance
Characteristics of arterial ulcers
clearly defined borders, are extremely tender and the pain worsens with elevation of the leg (this reduces blood flow to the ischaemic tissue by removing the beneficial effect of gravity).
Characteristics of neuropathic ulcers
painless and will tend to arise at pressure points across the foot (e.g. balls of the foot).
What is preferred method of VTE prophylaxis in hospital? When is this contraindicated? What should be used instead?
VTE prophylaxis in hospital is usually given as a low-molecular weight heparin (e.g. tinzaparin), however, it is contraindicated in renal impairment (eGFR < 30 mL/min) as it is primarily renally excreted. Patients with renal impairment should, therefore, be started on IV unfractionated heparin instead.
Scoring system for severitty of an upper GI bleed
Glasgow-Blatchford scale
Scoring system post-endoscopy to determine how likely a patient is to have another bleed
Rockall score
How does gliclazide lead to increased insulin secretion?
They act on SUR1 receptors, which are associated with the KATP channel, and lead to its closure. They increased intracellular K+.
1st line treatment for MODY
Sulphonylurea
Immediate management of addisonian crisis
IV hydrocortisone and IV fluids
Criteria for diagnosis of Adrenal insufficiency following synACTH administration
Individuals with adrenal insufficiency will not demonstrate a sufficient rise in cortisol (< 420 nmol/L).
How can ACTH level be used to guide whether it is priamry or secondary adrenal failure?
If the ACTH level is low, then the adrenal insufficiency is due to secondary adrenal failure.
Causes of secondary adrenal failure include hypopituitarism and exogenous glucocorticoid administration.
4 types of MND
There are four main types of motor neurone disease depending on the types of motor neurones affected:
amyotrophic lateral sclerosis (upper and lower motor neurones)
primary lateral sclerosis (upper motor neurones only)
progressive bulbar palsy (cranial nerves IX, X and XII)
progressive muscular atrophy (lower motor neurones only).
Triad of Wernicke’s
confusion, ophthalmoplegia and ataxia.
Treatment of Wernicke’s
Pabrinex is a medication that contains thiamine and should be given to all alcoholic patients, irrespective of whether they have presented with signs of Wernicke’s encephalopathy.
Treatment of beta blocker OD
Atropine (if patient is bradycardic)
Treatment of benzo OD
Flumazenil
Treatment of malignant hyperthermia following suxamethomium
IV dantrolene
Treatment of cyanide poisoning
Hydroxocobalamin
Treatment of paraccetemol OD
NAC