past paper Q's Flashcards
what are the 3 defining features of a health economic evaluation?
cost both services
benefits both services
comparison of the cost and benefit of the service and alternative service
2 features comprising a QALY?
number of years
quality of life- i.e. utility
what system do health economists use to evaluate disability?
dalys- disability adjusted life years
define healthcare economic ‘efficiency’
getting the max cost/ health benefit outcome from a service
what is the term when treatment is given elsewhere because it gives better benefit on another opportunity?
opportunity cost i.e the money is spent elsewhere because it gives better benefit on another opportunity
what is a SAH?
Bleeding into the subarachnoid space- between arachnoid membrane and pia mater
why does SAH cause a coma?
raised ICP and hydrocephalus
causes of coma?
hypoglycaemia meningococcal septicaemia trauma SAH hypoxaemia seizures
what causes a fixed dilated pupil?
3rd nerve palsy (oculomotor)
immediate management of SAH?
A-E assessment CT scan treat hypertension- nimodipine Intubate and give O2 mannitol-fusion colloid refer for surgery to stem bleed- coiling
4 features of brainstem death?
- no respiratory effort in reaction to turning off ventilator
- fixed pupils unreactive to light
- no corneal reflex
- no cough reflex
- no response to supra orbital pressure
screening by GP for microvascular damage of DM?
Retinal screening
kidney U&E- urine albumin and serum creatinine
Foot care screening- monofilament for sensation
ABPI
causes of increasing floaters?
diabetic retinopathy retinal detachment/tear posterior vitreous detachment trauma recent cataract surgery
Ix of floaters in eye?
1) Fundus photography Schaffer’s sign- positive when you use a thin beam of bright light without a lens and see fine pigment floating in the anterior vitreous
2) ophthalmoscopy
3) ultrasound- flying angel sign
most common cell of bladder cancer?
transitional cell
squamous cell is most common
risk factors for bladder cancer?
FH
smoking
frequent bladder infections
working in a rubber dye factory
which artery supplies the superior and inferior vesical arteries?
internal iliac
what lymph nodes can bladder cancer metastasise to?
external iliac
obturator
internal iliac
common iliac
2 signs of cauda equina in the following areas?
- perianal skin
- lower limb
- anal and urethral sphincters
Perianal skin -paraesthesia, decreased tone
Lower limb -upgoing plantars, pain, altered reflexes
Anal and urethral- decreased tone, incontinence
what abnormal heart sound is heart in pericarditis?
pericardial rub
4 Ix of pericarditis?
USS
CXR
bloods
ECG
2 treatments for pericarditis?
NSAIDS
Steroids
triad of cardiac tamponade?
raised JVP
BP 90/40
tachycardia
causes of pericarditis?
recent viral infection recent bacterial infection e.g. TB recent MI Chest trauma Autoimmune disorders Cancer Uraemic pericarditis
moat common type of lung cancer?
squamous cell adenoma (non- small cell)
common causes of bowel obstruction?
adhesions cancer constipation diverticulitis hernias
common causes of constipation?
drugs
dehydration
autonomic neuropathy
immobility
important things to assess in a fracture?
open/closed
stable/non-stable
neurovascular status
is it displaced
what is the salter harris classification of injury to growth plates?
1- through the growth plate
2- (most common)- through growth plate and metaphysis (proximal)
3- through growth plate and epiphysis (distal)
4- through all 3 elements
5- crush injury of growth plate
how does rivaroxaban work?
inhibits factor 10a
where does the varicella zoster virus reside?
geniculate ganglion
symptoms of ramsey hunt syndrome?
facial palsy
ear: vertigo, ear pain
altered taste, dry mouth, dry eyes
3 actions of PTH?
osteoclast activation
stops loss of ca in the urine
increased absorption from GI
complications of hypercalcaemia?
cardiac arrhythmias
coma
cardiac arrest- short QT and Osborn wave
tx of hypercalcaemia?
fluid
furosemide
bisphosphonates
calcitonin
ix of beta thalassaemia?
FBC- microcytic hypochromic anaemia
Haemoglobin electrophoresis
DNA testing
what is a complication of treatment for B-thalassaemia?
how is this complication prevented?
iron induced oxidative stress
Liver
Heart
Brain
Iron chelation therapy
Ix for rectal bleeding?
Foecal calprotectin
bloods
anti-endomysial antibodies and anti-TTG
colonoscopy and biopsy
what is the pathophysiology behind anaphylaxis?
type 1 hypersensitivity reaction- degranulation of mast cells releasing histamine
what are the 5 causes for an association?
bias
chance
confounding
reverse causality
why isn’t there a PSA screening programme in the UK?
length time bias- harmess tumours detected Unnecessary treatment PSA is unreliable Causes undue worry many tumours are slow-growing
when is it appropriate to do a PSA?
Men above age 50
suspicious PR findings
monitoring treatment and remission of prostate cancer
what does an upright CXR exclude in a woman with constipation?
bowel perforation
what do the blood findings raised urea, low creatinine and high Na show?
dehydration
drug treatments of incomplete miscarriage?
anti-D
misoprostol
RFs of intermittent claudication?
smoking diabetes hypertension hyperlipidaemia lack of exercise
how to do ABPI?
A blood pressure cuff is inflated around the lower calf muscle above the ankle joint, and a doppler ultrasound probe placed over the dorsalis pedis artery and the posterior tibial artery
- the max cuff pressure at which the pulse can just be heard with the probe is recorded and related to SBP at brachial artery
- lower BP in the legs is an indicator of PAD
important physical signs in pre-op assessment?
Mallampati- how much of the soft palate in visible on opening of the mouth
Thyromental and sternomental distance
complications seen in RA after routine surgery?
adrenal crisis from stopping prednisolone
RA produces hypercoaguable state- increased VTE risk, infection risk from steroid
Immunosuppression from methotrexate
how to differentiate between testicular torsion and epididymo-orchitis?
Prehn’s sign- scrotal elevation relieves pain in epididymitis but not torsion
Absent cremasteric reflex- torsion
testicle is higher- torsion
differentials of quinsy?
epiglottitis lymphoma tonsillitis pharyngitis craniopharyngioma glandular fever
what is the name of the lymph node affected by quinsy?
jugulodigastric lymph nodes
what hormone is hypersecreted in Conn’s syndrome and where from?
and what hormone is suppressed?
aldosterone (mineralocorticoid) , adrenal cortex
renin, JG apparatus
4 ECG features of hypokalaemia?
U have no POT and no T, but a large PR and a large QT
U waves
small or absent T waves
long PR
long QT
imaging in conn’s syndrome?
CT adrenal gland
where does spironolactone act?
aldosterone antagonist in the cortical collecting duct
used in ascites
2 ECG changes in ischaemia?
ST depression
T wave inversion
how do beta blockers work?
block beta-adrenoreceptors , antagonising the sympathetic NS (reducing NA and adrenaline)
reduces HR and force of contraction
can be cardio-selective or non-cardio selective e.g. propranolol
(can work in sphincters of GI tract- to make them contract)
how do nitrates work?
cause NO release which leads to vasodilation and decreased PVR
why do you do 3 samples of LP in a SAH?
One for virology, one for microbiology and one for biochemistry
what pathological structure causes SAH?
berry aneurysm
what causes headaches pre-SAH?
Sentinel headache due to much smaller lead from the ruptured aneurysm
how does salbutamol work?
beta-2 agonist
relaxation of bronchial smooth muscle, bronchodilation
symptoms of SLE?
malaise, fever, abdo pain, weight loss, fatigue, headache
signs of SLE?
malar rash discoid rash photosensitivity oral ulceration arthritis serositis seizures/psychosis proteinuria anaemia
features of anti-phospholipid syndrome?
CLOTS Coagulation defect Livedo reticularis Obstetric (recurrent miscarriage) Thrombocytopenia SLE
what is amoebiasis?
Amoebiasis is caused by Entamoeba histolytica (an amoeboid protozoan) and spread by the faecal-oral route
features of amoebiasis?
dysentery- bloody diarrhoea
Amoebic liver abscess-mass in R lobe, fever, RUQ pain
what is found on stool microscopy of amoebiasis?
trophozoites, amoebic cysts
tx of amoebiasis?
mentronidazole
how do alpha blockers work?
smooth muscle of blood vessels and GI tract
vasoconstriction of blood vessels and decreased motility in the GI tract
where do beta receptors act?
cause smooth muscle relaxation
GI tract
blood vessels
bronchi
what is adrenaline produced by?
“chromaffin cells” in the adrenal glands
what is phaeochromocytoma
a tumour of the chromaffin cells that secretes unregulated and excessive amounts of adrenaline
caused by MEN 2
features of phaeochromocytoma?
hypertension headaches palpitations sweating anxiety
diagnosis of phaeochromocytoma?
24 hr urinary collection of metanephrines
mx of phaeochromocytoma?
Surgery is the definitive management. The patient must first however be stabilized with medical management:
alpha-blocker (e.g. phenoxybenzamine), given before a
beta-blocker (e.g. propranolol)
what is the pathophysiology of CML?
Philadelphia chromosome- t(9:22) chromosomal translocation= BCR-ABL gene= excess tyrosine kinase activity
tx of CML?
imatinib- tyrosine kinase inhibitor
what is the full name of chlamydia?
chlamydia trachomatis
what is the formula for fluid correction given to a burns patient?
4 x weight x burn percentage
what level of burns is burns with no blistering but reduced pin-prick sensation?
3rd degree, full thickness
electrolyte complication of burns?
hyperkalaemia due to lysis of cells
name some viral and bacterial causes of hospital acquired infections?
viral- norovirus, rotavirus
bacterial- campylobacter, staph aureus, E.coli, C.diff
possible sources of infection in hospital?
resp droplet/airborne
catheter
bloods/cannulas
food
cause of infectious mononucleosis?
EBV
causes of pharyngitis and cervical lymphadenopathy other that EBV?
CMV toxoplasmosis HIV rubella mumps
features of mouth and throat examination of infectious mononucleosis?
sore throat tonsillar enlargement erythema uvula oedema lymphadenopathy palatal petechiae pyrexia
test used to confirm infectious mononucleosis?
Monospot test-hereophil antibody test
FBC, WCC
other features of glandular fever?
splenomegaly- occurs in 50%
hepatitis- transient rise in ALT
lymphocytosis
haemolytic anaemia secondary to cold agglutins
maculopapular pruritic rash common in amoxicillin tx
how does serotonin work?
increases synaptic cleft serotonin level
proven to work with depression
less side effects
what is the most likely cause of mitral stenosis?
rheumatic fever- think in a patient with a new murmur and arthralgia after sore throat
cause of rheumatic fever?
streptococcus pyogenes
why do the following happen in mitral stenosis:
- AF
- RV heave
- Raised JVP
AF- increase of left atrial pressure and dilatation
RV heave- RV hypertrophy
Raised JVP- pulmonary hypertension/ right heart failure
why does mitral stenosis cause dyspnoea?
increased pressure in the atrium due to stenosis, backlog into pulmonary circulation leading to fluid overload leading to INCREASED HYDROSTATIC PRESSURE causing fluid to shift from vascular to interstitial causing oedema and SOB
treatments of COPD after standard medical therapy fails?
LTOT
home nebulisers
pulmonary rehab
CPAP
signs of CO2 retention?
confusion asterixis warm extremities bounding pulse morning headache
what does a low base excess mean? (
there is a lower than normal amount of HCO3- in the blood, suggesting a primary metabolic acidosis or a compensated resp acidosis
how can pancreatitis lead to foul smelling, floaty stools?
pancreatic exocrine dysfunction- lack of faecal elastase
how are spinal cord compression and cauda equina different?
cauda equina- lower back pain and sciatica- bilateral, saddle anaesthesia, loss of anal tone, urinary retention
spinal cord compression- leg weakness and radicular pain, urinary and bowel incontinence, sensory level
treatments of addisons disease?
fludrocortisone
hydrocortisone