Passmedicine Questions Flashcards
Electrolyte abnormality associated with thiazide diuretics
Hyponatraemia Hypokalaemia Hypomagnesemia Hypercalcaemia Hypocalciuria Hyperglycaemia (impaired glucose tolerance)
Example of thiazide diuretic
Bendroflumethiazide
ABG in diarrhoea
Normal anion gap acidosis
ABG in vomiting
Metabolic alkalosis
How do you calculate anion gap
(sodium + potassium) - (bicarbonate + chloride)
Range = 10/18 mmol/L
ABG in primary hyperaldosteronism
Metabolic acidosis - hypernatraemia and hypokalaemia
Posterior MI ECG
ST depression in V1-V3 and tall R waves in V1 and V2.
LBBB ECG findings
Broad QRS, dominant S wave in V1, broad monophasic R waves in lateral leads
RBBB ECG findings
Broad QRS complexes, RSR pattern in V1-V3, wide slurred S waves in lateral leads
Complications of thiazide diuretics
Gout
Levothyroxine interactions
Iron / calcium carbonate reduces absorbtion of levothyroxine
Management of COPD
1st line: SABA (eg. salbutamol) or SAMA (eg. ipratropium).
2nd line: LABA (eg. formoterol, salmeterol) and LAMA (eg. tiotropium) and inhaled corticosteroids (eg. beclomethasone)
What condition causes abnormal pigmentation of the large bowel due to the presence of pigment-laden macrophages?
Melanosis coli.
Often caused by prolonged laxative abuse.
Medication to use in type 2 DM patients who are obese
DPP-4 inhibitor
DM medications that can cause weight gain
Sulphonylurea
Pioglitazone
Insulin
How many days before surgery should warfarin be stopped?
5 days
Mechanism of action of indapamide
Thiazide-like diuretic
Mechanism of action of candesartan
ARB (angiotensin receptor blocker)
Common post-MI systolic murmur
Mitral regurgitation
What does notching of the inferior border of the ribs suggest?
Coarctation of the aorta
Signs of left ventricular aneurysms post-MI
Tiredness
Breathlessness
Persistent ST elevation
Ultrasound findings in chronic diabetic nephropathy
Large (early disease) / normal sized kidneys (later disease)
Ultrasound findings in chronic kidney disease
Bilateral small kidneys
Diagnosis criteria for AKI
Increase in creatinine > 26 umol/L in 48hrs
Increase in creatinine > 50% in 7 days
Decrease in urine output < 0.5 ml/kg/hr for more than 6 hours
How does hypertrophic obstructive cardiomyopathy present?
Exertional dyspnoea
Ventricular hypertrophy on ECG
What condition is metoclopramide contraindicated in?
Parkinsonism
When is BIPAP useful?
Type 2 respiratory failure. Especially COPD exacerbations
When is CPAP useful?
Type 1 respiratory failure. Especially pulmonary oedema
Primary pneumothroax management guidelines
Rim of air < 2cm + not short of breath = discharge.
If > 2cm or short of breath = aspiration.
If aspiration is unsuccessful = chest drain
Secondary pneumothorax management guidelines
Patient > 50 + rim of air > 2 cm +/- short of breath = chest drain insertion.
Rim of air 1-2cm = aspiration.
If aspiration fails = chest drain.
Rim of air < 1cm = give O2 and admit for 24 hrs
What nephritic syndrome develops 1-2 weeks after URTI?
Post streptococcus glomerulonephritis
What nephritic syndrome develops 1-2 days after URTI?
IgA nephropathy
What are the features of primary hyperaldosteronism?
Hypertension.
Hypokalaemia.
How are primary and secondary hyperaldosteronism differentiated?
Plasma aldosterone/renin ratio.
High ratio = primary
Low ratio = secondary
How is primary hyperaldosteronism diagnosed?
Adrenal imaging.
If unsuccessful: adrenal venous sampling.
Differentiates between unilateral adenoma (Conn’s syndrome) and bilateral hyperplasia
What are the features of aldrenal insufficiency? (Addison’s)
Hypotension
Hyponatraemia
Hyperkalaemia
What is a raised ACR?
> 3 mg/mmol
What medication should be commenced if ACR is raised?
ACE-i
What electrolyte imbalance can be caused by PPIs?
Hyponatraemia
What hormones are reduced by the stress response?
Insulin
Oestrogen
Testosterone
What is the commonest cause of mortality in CKD patients on haemodialysis?
Ischaemic heart disease
ECG findings in hypokalaemia
Prominent U-waves, best seen in precordial leads.
T waves have a ‘sine wave’ appearance.
Prolonged QTc > 600ms.
Borderline PR interval.
Features of Good Pasture’s Syndrome
Haemoptysis
Haematuria
What ACS medication is contraindicated in patients with hypotension?
Nitrates
What skull changes are seen in multiple myeloma?
Rain-drop skull (a random pattern of dark spots)
What skull changes are seen in primary hyperparathyroidism?
Pepperpot skull
What blood results are seen in beta-thalassaemia trait (minor)?
Disproportionate microcytic anaemia - raised haemoglobin A2 (HbA2)
What is the correct management if a DVT US is negative?
Stop DOAC and repeat US in a week
Causes of a raised APTT
Haemophilia (A,B,C)
Von Willebrand disease
Heparin
Casues of a prolonged PT
Liver disease
DIC
Vitamin K deficiency
Warfarin
Causes of a prolonged PT and APTT
Vitamin K deficiency - liver disease, malabsorption
DIC
Factor V or X
What blood product is the most likely to cause iatrogenic septicaemia with a Gram-positive organism?
Platelets (stored at room temperature)
What blood product is the most likely to cause iatrogenic septicaemia with a Gram-negative organism?
Packed red cells
What nuclei are seen in Reed-Sternberg cells?
Mirror image nuclei
When should a patient with AF + an acute stroke (not haemorrhagic) be started on anticoagulation?
Two weeks after the event
What blood results indicate an aplastic crisis?
Severe anaemia and a reduced reticulocyte count
What is an ejection systolic murmur heard best on inspiration?
Pulmonary stenosis
What is an ejection systolic murmur heard best on expiration?
Aortic stenosis
What is a mid-late diastolic murmur heard loudest in expiration?
Mitral stenosis
What is a mid-systolic murmur heard loudest in expiration?
Mitral valve prolapse
What is a mid / late diastolic murmur heard loudest in inspiration?
Tricuspid stenosis
What adjustments should be made to levothyroxine in pregnancy?
Increase levothyroxine by 50%
What scale is used to identify obstructive sleep apnoea?
Epworth Sleepiness Scale
What is 1st line management for moderate / severe obstructive sleep apnoea?
CPAP
What is classified as NYHA class I?
No symptoms
No limitation
What is classified as NYHA class II?
Mild symptoms
Slight limitation of physical activity
What is classified as NYHA class III?
Moderate symptoms
Marked limitation of physical activity
What is classified as NYHA class IV?
Severe symptoms
Unable to carry out any physical activity without discomfort
Symptoms present at rest
What ACS medication is contraindicated in pregnany?
Statins
What may be seen on a blood film of a patient with functional hyposplenism secondary to coeliac disease?
Howell-Jolly bodies and target cells
What is first line treatment for a mild-moderate flare of distal ulcerative colitis?
Topical (rectal) mesalazine
What ECG changes are seen in acute pericarditis?
Widespread saddle shaped ST elevation
PR depression
What is 1st line treatment for meningitis in young adults?
IV ceftriaxone
What is the mechanism of action of loop diuretics?
Inhibits the Na-K-Cl cotransporter in the thick ascending limb of the loop of Helne