Haematology Flashcards
threshold for blood transfusion in normal population and people with ACS
70
ACS 80
timing for non urgent blood transfusions
over 90-120 mins
threshold for a platelet transfusion
low platelets and bleeding
what bacteria are platelets susceptible to and why
gram positive
stored at room temperature
hypotension, pyrexia and normal JVP
transfusion related acute lung injury
hypertension, afebrile and increased JVP
transfusion associated circulatory overload
management of transfusion associated circulatory overload
IV loop diuretic
management of minor allergic reactions during blood transfusion
temporarily stop and give an antihistamine
RF for allergic reactions during blood transfusion
IgA deficiency
presentation and cause of acute haemolytic reaction
fever, abdominal pain and hypotension during a transfusion
RBC destroyed by IgM
management of non-haemolytic transfusion pyrexia
paracetamol
what is the universal donor for fresh frozen plasma
AB RhD negative
management of DVT/PE if you cannot do a US/d-dimer within 4 hours
start a DOAC
scan negative but d-dimer positive
stop DOAC and rescan in 1w
slowly progressive symptoms of chronic pain, swelling, hyperpigmentation, venous ulcers and puritis 6m-2y after a DVT
post thromotic syndrome
pathophysiology of post thrombotic syndrome
chronic venous hypertension
management of post thrombotic syndrome
compression stocking
what does olanzapine increase the risk of
DVT
management of antiphospholipid syndrome in pregnancy
Aspirin and LMWH
which medications are direct factor xa inhibitors
which should be used in renal failure
rivaroxaban
apixaban (use in renal failure)
which medication is a direct thrombin inhibitor
dabigatran
which medication activates antithrombin III
heparin
which medication inhibits factors II VII IX and X
warfarin
definite diagnosis of sickle cell anaemia
haemoglobin electrophoresis
how often do people with sickle cell need the pneumococcal vaccination
5 years
diagnosis of vaso-occlusive crisis
clinical
reticulocyte levels in aplastic and sequestration crisis
aplastic: reduced reticulocytes
sequestration: increased reticulocytes
which virus predisposes an aplastic crisis
parvovirus B19
how do you manage the symptoms of anaemia in sickle cell crisis
exchange transfusions to increase the number of normal cells and reduce the number of sickle cells
dyspnoea, chest pain, cough, hypoxia, new pulmonary infiltrates on CXR
acute chest syndrome
which medication reduces the number of crisis’ in sickle cell
LT hydroxycarbamide
red beefy tongue caused by ileocaecal resection
Vitamin B12 deficiency
what must you replace first, B12 or folate
correct B12 deficiency before folate
cause of megaloblastic anaemia secondary to folate deficiency
methotrexate
cause of an isolated rise in GGT in macrocytic anaemia
alcohol
hyper segmented neutrophil polymorphs
megaloblastic anaemia
heinz bodies and RBC fragments
haemolytic anaemia
positive coombs test and spherocytes on blood film
autoimmune haemolytic anaemia
give steroids
intravascular haemolysis and reduced haptoglobin levels
idiopathic autoimmune haemolytic anaemia
management of warm autoimmune haemolytic anaemia
steroids and rituximab
IgM mediated haemolysis at cold temperatures causing a macrocytic anaemia
cold autoimmune haemolytic anaemia
(link with lymphoma)
splenic rupture causing chronic haemolysis and gallstones
hereditary spherocytosis
diagnosis of hereditary spherocytosis
EMA binding test
jaundice, fatigue, anaemia and red macules on cheeks in hereditary spherocytosis
haemolytic crisis
TIBC and transferrin levels in iron deficiency anaemia
increased
hypochromic microcytic anaemia with increased ferritin and transferrin and basophilic stripping of RBC
sideroblastic anaemia
high HbA2 and disproportonate microcytic anaemia
beta thalassaemia trait
management of beta thalassaemia major
lifelong blood transfusions and iron chelation therapy with desferroxamine to prevent iron overload
what anaemia does phenytoin cause
aplastic
what condition can precipitate AML
polycythaemia rubra vera
tear drop polilocytes
myelofibrosis
what age does polycythaemia rubra vera peak at
60
management of polycythaemia rubra vera
aspirin (high stroke/vte risk)
venesection
chemo
name one cause of secondary polycythaemia
COPD (reduced plasma to RBC ratio)
auer rods
acute promyelotic leukaemia
3 genetic associated with CML
Philadelphia chromosome
9:22 translocation
BCR ABL gene
anaemia, splenomegaly, weight loss, sweats in 60-70y
CML
leucocytosis, high granulocytes, reduced ALP, thrombocytosis
CML
treatment for CML
imatinib
tyrosine kinase inhibitor
reduced weight, bleeding, lymphadenopathy and a LARGE NUMBER OF INFECTIONS
CLL
smear/smudge cells
CLL
new B sx in CLL
richters transformation to non-hodgkins (do a lymph node biopsy)
which anaemia is associated with CLL
warm haemolytic anaemia
what sign does myelofibrosis, CLL, malaria, gauchers syndrome and visceral leishmaniasis cause
massive splenomegaly
3 features of reed sternberg cells (what cancer?)
large multinucleate nucleus
prominent eosinophilic nuclei
mirror image nuclei
HODGKINS
staging of Hodgkin’s
1: single lymph node
2: 2+ lymph nodes on the same side of the diaphragm
3: lymph nodes on both sides of the diaphragm
4: spread beyond the lymph nodes
lymphoma with the best prognosis
lymphocyte predominant
lymphoma with the worst prognosis
lymphocyte depleted
most common lymphoma
nodular sclerosing
signs of a poor prognosis in lymphoma
B Sx (night sweats, fever above 38, weight loss 10% in 6m)
age
male
stage 4
rapidly proliferating lymphoma associated with ebstein barr virus
burkitt lymphoma
gene in burkitt lymphoma
c-myc
biopsy in burkitt lymphoma
starry sky
what complication can burkitt lymphoma cause
tumour lysis syndrome (seizures and arrhythmias)
how do you reduce the incidence of tumour lysis syndrome
give allopurinol/rasburicase prior to chemo
most common non-hodgkins lymphoma
diffuse large B cell
cause of gastric lymphoma (MALT)
h pylori
most common cancer in children
ALL
child with unexplained petechiae or hepatosplenomegaly
urgent specialist assessment
FBC
CRAB
hyperCalcaemia
Renal failure
Anaemia
Bone disease
Multiple Myeloma
Roluaux formation
multiple myeloma
inheritance of G6PD deficiency
x linked
greek boy with pallor and jaundice after LRTI with a history of neonatal jaundice and heinz bodies on film
G6PD deficiency
cause of haemolysis in G6PD deficiency
drugs: nitrofurantoin, sulph, glipizide
malaria prophylaxis: primaquine
infection
acidosis
beans
when would you repeat the G6PD enzyme assay after an acute episode
3m
bite and blister cells
G6PD deficiency
what are the following all causes of
factor V leiden
prothrombin gene mutation
antithrombin III deficiency
protein C deficiency
protein S deficiency
thrombophilia
which is the most common inherited thrombophilia
factor V leiden (protein C resistance)
deficiency in haemophilia A
factor VIII
hemarthrosis without trauma
haemophilia A or B
most common isolated thrombocytopenia
ITP
management of ITP
prednisolone
pentad in thrombotic thrombocytopenia purpura
fever
neuro signs
thrombocytopenia
haemolytic anaemia
renal failure
platelet levels prior to surgery
50: most people
50-75: high bleed risk
100: severe bleed risk
what contains factor VII, fibrinogen, factor XIII, von willibrand factor and is used if reduced fibrinogen found during active bleeding
cryoprecipirate
normal paltelet levels, increased bleeding time and increased APTT
vwd
treatment of vwd
desmopressin
what can alcoholic liver disease cause
thrombocytopenia
treatment of neutropenia
filgrastim
which groups are affected by benign ethnic neutropenia
black african and Afro-Caribbean
treatment of neutropenic sepsis
tazocin
piperacillin and tazobactam
abdo pain, constipation, neuropsych and basophilic stippling
lead poisoning
2 cells found in hyposplenism (coeliac) on blood film
target cells
howell jolly bodies
where do the lymphatics from the ovaries drain to
para aortic lymph nodes
which medication for major haemorrhage given as an IV bolus then infusion
tranexamic acid
painful maculopapular rash after recent allogenic bone marrow transplant
graft vs host
how do you reduce the risk of graft vs host disease
give irradiated blood products
blood profile in DIC
reduced platelets and fibrinogen
increased PT, APTT and fibrinogen degradation products
deranged coagulation
schistocytes
urine turns deep red on standing with abdo, neuro and pysch sx
often precipitated by nitrofurantoin
acute intermittent porphyria
management of acute intermittene porphyria
haem arginate
secretion of monoclonal IgM paraprotein causing raynauds, hepatosplenomegaly and stroke from increased viscosity
waldenstrom’s mactoglobulinaemia