Blood Banking Notes
Subject Overview
Blood Banking covers blood group systems and grouping technique, compatibility testing and cross-matching, transfusion complications and their investigation, preparation of blood component fractions (packed red cells, platelet concentrate, fresh frozen plasma, cryoprecipitate), haemapheresis, and quality control in the blood bank. A 4-credit open elective theory paper.
Subject at a glance
3
Units
21
Topics
4
Credits
3
Infographics
Unit-wise Syllabus
3 units — open any unit for detailed topic-wise notes, diagrams and important exam questions
- Introduction to and history of blood group systems
- ABO and Rh blood group systems
- sources of error in blood grouping
- complete vs incomplete antibodies
- tests for A/B substance secretion
- titration and storage of grouping antisera
- anticoagulants used in transfusion
- procedure for donor blood collection
Group A
A
Anti-B
Group B
B
Anti-A
Group AB
A and B
None: universal plasma recipient
Group O
None
Anti-A and anti-B: universal red cell donor
Study guide
This unit covers blood group systems: history, ABO and Rh, sources of error in grouping, complete and incomplete antibodies, secretor testing, titration and storage of antisera, anticoagulants for transfusion and donor blood collection. Learn the ABO blood groups with their antigens and antibodies.
- Compatibility testing — collection for cross-matching
- major and minor cross matching
- use of enzymes (papain) in the blood bank
- complications and hazards of transfusion
- investigation of transfusion reactions and mismatched transfusion
- direct and indirect Coombs tests
Detects
Antibodies already on red cells
Free antibodies in serum
Sample
Patient's red cells
Patient's serum + reagent red cells
Used for
Haemolytic disease of newborn, transfusion reaction, autoimmune haemolysis
Cross-matching, antibody screening in pregnancy
Study guide
You study compatibility testing and cross-matching (major and minor), use of enzymes, complications and hazards of transfusion, investigation of transfusion reactions and direct and indirect Coombs tests. Learn the steps to follow if a transfusion reaction is suspected.
- Preparation of packed/washed/frozen red cells
- platelet-rich plasma/concentrate/frozen platelets
- fresh plasma/FFP/cryoprecipitate
- blood substitutes
- haemapheresis for leucocytes
- platelets and plasma
- quality control in the blood bank
Packed red cells
2–6 °C, up to 35–42 days
Anaemia, blood loss
Platelet concentrate
20–24 °C with agitation, 5 days
Low platelets, bleeding
Fresh frozen plasma
−30 °C or colder, up to 1 year
Clotting factor deficiency
Cryoprecipitate
−30 °C or colder, up to 1 year
Low fibrinogen, factor VIII
Study guide
You study blood components: packed, washed and frozen red cells, platelet concentrates, fresh frozen plasma and cryoprecipitate, blood substitutes, apheresis and quality control in the blood bank. Know which component is used for which clinical need.
Why Blood Banking Matters
Blood banking is life-saving work: errors in grouping or cross-matching can be fatal, so the field values accuracy and careful procedure above all, with steady demand in hospitals and blood centres.
How to Prepare for Blood Banking
- Learn the ABO and Rh systems with a table of antigens and antibodies.
- Practise forward and reverse grouping with correct controls.
- Memorise the steps of cross-matching and transfusion reaction investigation.
Blood Banking: Frequently Asked Questions
What is cross-matching?
Cross-matching tests the donor's red cells with the recipient's serum (and the reverse) to confirm they are compatible before transfusion.
What is the Coombs test?
The Coombs test detects antibodies or complement attached to red cells and is used in investigating haemolytic reactions.