Hematology 🩸 Flashcards
(207 cards)
ABO incompatibility in pregnancy? big risk to fetus? signs?
only mild hemolysis ensues. mild jaundice within 24 hrs of birth, mild anemia, coombs positive, etc.
difference between thalassemia and IDA in regards to RBC no.
thalassemia: normal/high
IDA: low
Confirmatory tests for hereditary spherocytosis
Osmotic fragility test, or E5M binding test
Mx of febrile non haemolytic transfusion reaction (FNHTR)
Stop transfusion and give antipyretic (NSAID)
Prevent with leukoreduction
Mx if HIT
Stop heparin and give direct thrombin inhibitor
Gold standard to Dx HIT
Serotonin release immunoassay
Mx protocol for trauma based haemorrhage
Transfuse ASAP, (1:1:1 if massive haemorrhage RBC:FFP:PLT). If blood pressure very low, then give colloids first, then straight to bloods. 1L max NS
In acute haemorrhage, Why can O+ be given to men, but is generally avoided in women (need O-)
Women can become sensitised to the Rh, and can cause erythroblastosis fetalis. Rh mismatch for patients generally is ok though
When are massive transfusion requirements met
When there is concern for massive transfusion requirements (eg, SBP
<90/mm Hg, pulse ≥120/min, positive FAST, penetrating mechanism of
injury), blood products should be given in a 1:1:1 fresh frozen
plasma/packed red blood cells/platelets ratio
How to differentiate high PTT from lupus anticoagulant, and true high PTT
PTT will not correct when add plasma
Warfarin reversal. Consider if needs to be rapid or not
If rapid give PCC. If not give vitamin K
TPA overdose treatment
Aminocaproic acid, tranexamic acid, fresh-frozen plasma
Reversal agent for factor X inhibitors
Andexanet Alpha
Reversal for dabigatran
Idarucizumab
Management of bleeding due to warfarin
Stop warfarin. Give Ivy vitamin K and PCC
Patient on warfarin, INR is more than 10
Discontinue warfarin, give oral vitamin K and monitor INR
Patient on warfarin, INR is 4.5 to 10 and there is no bleeding. How to manage
Hold warfarin temporarily for a few doses. Consider giving oral vitamin K
Patient on warfarin INR is less than 4.5. How to manage
Hold the next dose of warfarin and readjust the maintenance dose
Appreciate the coag cascade
Haemophilia A cause
Haemophilia B cause
Haemophilia C cause
Factor 8
Factor 9
Factor 11
Resp
Four CIs for tPA
Active/risk of bleeding
IC lesion
<2mo trauma to spine or head
Stroke Hx within 3mo
When to use PCC vs vit K, for warfarin reversal (basics)
If immediate (do PCC)
tPA toxicity Tx
Aminocaproic acid, tranexamic acid, FFP
Reversal for factor Xa inhibitors
Andexanet alfa