SBA general revision Flashcards
causes of severely low platelets
ITP, DIC, TTP, haematologial malignancy, HUS
causes of modertely low platelets
HIT, drug-induced, EtOH, liver DZ, hypersplenism, viral infection, pregnancy, SLE/anti-PL S, B12 deficiency
in DIC the clots are made of
fibrin
before DIC the PT is
already ill with something else e.g. GNR bacteraemia, ITU, end stage liver DZ
DIC blood results
low platelets, low fibrinogen, high D-dimer, high PT, high PTT, high INR, blood film +ve for schistocytes (fragmented RBCs)
DIC management
treat underlying cause, give platelets, cryoprecipitate (to boost fibrinogen), FFP (for PT, PTT, INR), RBC for schistocytosis
fibrin clots in
DIC
PT already ill with something else e.g. GNR bacteraemia, ITU, end stage liver DZ then get low platelets is likely to be
DIC
low platelets, low fibrinogen, high D-dimer, high PT, high PTT, high INR, blood film +ve for schistocytes (fragmented RBCs) is typical of
DIC
TTP is
thrombotic thrombocytopaenic purpura
TTP clots are made of
hyaline
mneumonic to remember TTP presentation
FATRN
FATRN stands for
Fever, MAHA (microangiopathic heamolytic Anaemia), Thrombocytopaenia, Renal failure, Neuro symptoms
with TTP the PT is originally
well
TTP blood results
low platelets, +ve blood film for scistocytes
TTP management
exchange transfusion, don’t give platelets (makes it worse)
hyaline clots form in
TTP
FATRN is a way of remembering
PT presentation in TTP
a well PT who then develops low platelets may have
TTP
low platelets, +ve blood film for scistocytes are the blood results of
TTP
exchange transfusion, don’t give platelets (makes it worse) is the management of
TTP
asymptomatic, v low platelts (single digits), purpura, petechiae, bleeding from mucosal sites, ?post-recent infection describes the presentation of
ITP
ITP is
immune/idiopathic thrombocytopenia purpura
presentation of ITP
asymptomatic, v low platelts (single digits), purpura, petechiae, bleeding from mucosal sites, ?post-recent infection