DIAGNOSTIC TOOLS Flashcards
what colour blood bottle would you use to collect blood for a coagulation scree, INR or D-dimer?
light blue
what colour blood bottle would you use to collect U+E, CRP, LFTs, amylase, TFTs, lipid profile, troponin, Ca, PO4, Mg?
yellow
what colour blood both would you use to collect FBC, blood film, ESR and HBA1c?
purple
what colour blood bottle would you use for group and save and crossmatch?
pink
what colour blood bottle would you use for glucose or lactate?
grey
how is blood in a FBC purple bottle anti coagulated?
EDTA
if MCV is low, what type of anaemia does this indicate?
a) microcytic
b) megaloblastic/macrocytic
c) normocytic
a) microcytic
if MCV is high, what type of anaemia does this indicate?
a) microcytic
b) megaloblastic/macrocytic
c) normocytic
b) megaloblastic/macrocytic
if MCV is normal, what type of anaemia could this indicate?
a) microcytic
b) megaloblastic/macrocytic
c) normocytic
c) normocytic
what is the most common cause of normocytic anaemia?
chronic disease
high WCC might indicate what?
infection
malignancy
low neutrophils might indicate what?
malignancy
what 2 things might high neutrophils indicate
bacterial infection
inflammation
what type of infection might high lymphocytes indicate?
viral
what other type of disease might cause raised lymphocytes?
autoimmune
what blood cell might be raised in chronic inflammation and TB infection?
monocytes
what blood cell might be raised in allergy and parasitic infection?
eosinophils
what blood marker might be raised post-operatively and during infection and inflammation?
platelets
give 2 examples of when urea might be raised
renal failure
protein load
if raised urea was due to protein load not renal failure, what might you expect creatinine to look like in U+Es?
normal
give 4 causes of raised creatinine
renal failure dehydration shock glomerulonephritis pyelonephritis
give 2 instances when sodium might be low
D+V
thiazide diuretics
kidney disease
Addison’s
give 2 instances when sodium might be high
hyperaldosteronism
Cushing’s
hypertension
give 2 instances when potassium may be low
insulin use
non K-sparing diuretics
D+V
give 2 instances when potassium might be high
kidney disease
addison’s
trauma
diabetes
explain why albumin is low in these two situations
a) nephrotic syndrome
b) liver failure
a) leaky glomeruli
b) none produced
to what biological molecule does albumin bind?
bilirubin
where is ALT made?
liver
what is ALT a marker of?
liver damage
what 2 things is AST a marker of?
liver damage
heart damage
explain the LOVE SAKE mnemonic for the relationship between ALT and AST
if ALT higher = viral hepatitis
if AST higher = alcoholic hepatitis
what 2 things is ALP a marker of?
paget’s bone disease
biliary damage/obstruction
what clinical sign is elevated bilirubin an indicator of?
jaundice
CRP and ESR are both infective markers - what is their different usefulness?
CRP = more acute marker ESR = remains high for a few weeks
what three things are measured in TFTs?
TSH
free T3, free T4
what clotting pathway is plotted by prothrombin time?
extrinsic
what clotting pathway is plotted by activated partial thrombin time?
intrinsic pathway
what clotting pathway is plotted by thrombin time?
common pathway
what drug is monitored using INR?
warfarin
what type of motor neurone damage arises from stroke, tumour or blunt trauma?
upper motor neuron
where is the site of an UMN lesion?
above anterior horn
what is the effect on the following in an UMN lesion?
a) muscle tone
b) weakness
c) reflexes
a) increased - spasticity
b) increased
c) increased - hypereflexia
what 2 reflex signs might you see in an UMN lesion?
babinski’s sign
clonus
what is the site of a LMN lesion?
inside or distal to anterior horn
what is the effect on the following in an LMN lesion?
a) muscle tone
b) muscle size
c) reflexes
a) decreased - hypotonia + fasciculation
b) atrophy of muscles
c) decreased + arreflexia
if there was damage at the point of a spinal cord disc, what would neurone signs look like at that level and below that level?
at that level = LMN signs
below that level = UMN signs
what are the 3 types of jaundice?
pre hepatic, intra-hepatic, post hepatic
what type of jaundice are you most likely to be very yellow during?
post hepatic
What causes increase breakdown of RBC (haemolysis) leading to excess bilirubin and consequently pre-hepatic jaundice ( unconjugated hyperbilirubinaemia)?
Sickle cell anaemia Trauma Thalassemia Malaria hereditary spherocytosis= reduce RBC lifespan haemolytic anaemia