Past Papers Haem Flashcards
blood transfusion, rash several hours later
Allergic reaction
Delayed HTR if Days later
RTA, 6 units blood
SOB, fever, tachycardia
TRALI
B thalassaemia, regular transfusions
Malaise and erectile dysfunction
Transfusion associated haemosiderosis
AAA repair
several days later fever, low Hb, jaundice
Delayed HTR
myelodysplastic syndrome (MDS)
minutes after transfusion
tachycardic, transfusion site pain, Hypotension
ABO incompatibility
or Immediate transfusion reaction
Blood transfusion several DAYS later Fever, Low Hb/signs of anaemia, Jaundice Extravascular haemolysis IgG mediated
Delayed HTR
acute transfusion reaction (mins)
risk higher in IgA deficiency
anaphylaxis
Transfusion reaction in minutes to hours bleeding, dark urine, no rash abdo pain, flush, vomiting host IgM-mediated (attack donor RBC)
ABO incompatibility (immediate HTR)
severest if group A to group O
Transfusion reaction
minutes to hours
no rash, shock and high fever
Commonly in platelet transfusion
Bacterial contamination
Hep B/C, HIV
Transfusion reaction
minutes to hours
Rise temp of ≤1ºC (MILD fever), rigors
commonest transfusion reaction
after pregnancy
WBC release cytokines, and prevented by leukodepletion
Febrile non-haemolytic transfusion reaction
NB ABO has drop in BP as RBC targeted, but febrile non-HTR there is NO drop in BP
Transfusion reaction in HOURS Pulmonary oedema/fluid overload HF: ↑JVP, ↑PCWP no fever
Transfusion-associated circulatory overload
Transfusion reaction
in HOURS <6 hrs
dry cough, SOB, fever, tachy
bilateral lung infiltrates/oedema
No HF (↑JVP) cause = dont anti-HLA Abs
Transfusion-related acute lung injury
TRALI
Diarrhoea, liver failure, skin desquamation and bone marrow failure DAYS later (>24hr)
Donor WBCs recognise recipient’s HLA as foreign and attack gut, liver, skin, BM
Prevent by irradiating blood components for immunosuppressed recipients
GvHD
SCD/thalassaemia blood transfusions
bronze skin, HF, short stature
Transfusion associated haemosiderosis
/ Fe overload
African lady
requests a sickle cell solubility test
low Hb, normal MCV?]
clouding of the tested blood
Sickle cell trait
African child
low Hb,normal MCV
Electrophoresis - high HbS and low HbF
SCD
Normal = HbA =~99.99%, HbF, HbA2 = ~0.01% each or none.
Haemolysis after antimalarials / malaria treatment
G6PD
spherocytes
polychromasia
reticulocytosis on blood film
hereditary spherocytosis
Coeliac disease
poor compliance with diet
macrocytosis
cause?
folate deficiency