Passmed knowledge Flashcards
antibiotic for syphallis
benzathine benzylpenicillin
how to manage migraine ?
Migraine
acute: triptan + NSAID or triptan + paracetamol
prophylaxis: topiramate or propranolol
(be careful no beta blocker for asthma patient)
Why can’t asthmatics have propanolol?
propanolol = beta blockers
The β2 receptors in the lungs help relax the smooth muscle of the airways, promoting bronchodilation.
Therefore, beta blockers conversely promote bronchoconstriction and also bronchospasm.
They also act in opposition to drugs like salbutemol (short-acting β2-adrenergic receptor agonist (SABA))
why do COPD patients have lower target o2 sats?
COPD patients are chronic CO2 retainers.
Physiologically, breathing is driven by CO2 levels picked up in the brains central chemoreceptors.
But these patients the body becomes less sensitive to CO2 over time. They loose their hypercapnic drive.
Instead these patients rely on hypoxia to influence their breathing rate (hypoxic drive).
Giving these patients high levels of oxygen can reduce their stimulus to breath.
The goal is to provide just enough oxygen to maintain adequate tissue oxygenation without suppressing the hypoxic drive or causing excessive CO2 retention.
If about to have OGD what should happen with PPI meds?
Proton pump inhibitors should be stopped 2 weeks before an upper GI endoscopy
what is a normal LVEF?
Normal LVEF is 45%-60%
therefore reduced is less than 45
first line for heart failure management ?
The first-line treatment for all patients is both an ACE-inhibitor and a beta-blocker
generally, one drug should be started at a time. NICE advise that clinical judgement is used when determining which one to start first
beta-blockers licensed to treat heart failure in the UK include bisoprolol, carvedilol, and nebivolol.
ACE-inhibitors and beta-blockers have no effect on mortality in heart failure with preserved ejection fraction
double duct sign?
pancreatic cancer
dilation of common bile duct and and pancreatic duct
which med for secondary prevention of iscaemic stroke ?
clopidogrel 75mg OD
which med for secondary prevention of TIA ?
clopidogrel 75mg OD
which valve is affected in infective endocarditis ?
In infective endocarditis, the mitral valve is most commonly affected
which valve in IE for IV drug users?
tricuspid valve
preceding influenza predisposes to which organism for pneumonia ?
S aureus
how to calc alcohol lunits ? 1
Alcohol units = volume (ml) * ABV / 1,000
why ACE-i bad for AKI but reno-protective in CKD?
RAAS
IN AKI, there is often hypoperfusion of kidney. Therefore RAAS activated -> vasocontriction of efferent arteriole. maintains filtrations despite low renal blood flow. ACE-i blocks this system and doesn’t allow kidney to be well perfused.
In CKD, RAAS contributes to glomerular hypertension, fibrosis, and proteinuria. Therefore, blocking this is good.
what acid base in cushings?
Cushing’s syndrome - hypokalaemic metabolic alkalosis
scoring system to assess bleeding risk ?
ORBIT scoring system
apixaban mechanism (what does it iniibibt?
factor Xa inhibitor
when to send a urine culture in UTI (MSU)?
non-pregnant women = over 65, visible or non visible haemturia
pregannt women = alwsys
men = always
tool for preidtcing chance of getting cardiovascular disease ?
QRISK
this is 10 year risk. given as a percentage. 10% is cut off for statin therapy and also SGLT-2 tx in t2dm
pneumonia + traget lesion ? also what is target lesion?
mycoplasma pneumoniae
target lesion = erythema multiforme
bacterial vaginosis organism ?
Bacterial vaginosis - overgrowth of predominately Gardnerella vaginalis
breast cancer marker
ca 15-3
CA125 = ovarian
CA19-9 = pacnreatic cancer
how long are tthe clusters of cluster headacehs
Clusters’ of cluster headaches typically last from 4 to 12 weeks