ABO blood grouping and cross-match testing
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Page 2 - Introduction to ABO Blood Grouping and Cross-Match
Document Title: ABO blood grouping and Cross-match
Author: T Soltantoye
Affiliation: Department of Immunology, School of Medicine, Tehran University of Medical Sciences
Date: 1403.07.21
Page 3 - Common Reasons for Blood Transfusion
Injury: Situations where rapid volume restoration is necessary.
Hemorrhagic Condition: Conditions resulting in significant blood loss.
Surgical Procedures: Operations that may cause excessive blood loss.
Hematological Disorders: Disorders affecting blood production or components.
Page 4 - Compatibility Testing
Purpose: To ensure blood transfusions are safe for patients.
Key Components of Compatibility Testing:
ABO-Rh blood typing of both donor and recipient.
Antibody screening of recipient and donor.
Testing for infectious diseases in donors.
Cross-Matching: Direct comparison of recipient's serum with donor's red blood cells.
Page 5 - Blood Grouping Overview
Routine Blood Grouping: Generally includes ABO and Rh typing.
Other Blood Group Systems: Not matched routinely but can cause reactions due to rare antibodies.
Cross-Matching Detection: Identifies antibodies against ABO, Rh, and other systems.
Page 6 - ABO Antigens
ABO Antigens:
Antigen A: N-acetyl-galactosamine
Antigen B: Galactose
Supplementary Information:
Blood Types:
Type A: Has IgM Anti-B antibodies
Type B: Has IgM Anti-A antibodies
Type AB: No antibodies
Type O: No A or B antigens, IgM anti-A and anti-B antibodies.
Page 7 - Blood Group Antibodies
Blood Group A: Has Anti-B antibodies.
Blood Group B: Has Anti-A antibodies.
Blood Group AB: Has no antibodies, contains both antigens A and B.
Blood Group O: Has no antigens (A or B) and has both Anti-A and Anti-B antibodies in serum.
Page 8 - Rh Blood Group System
Complexity: Comprises approximately 40 antigens.
Antigen D: The most immunogenic and significant for Rh typing.
Page 9 - ABO/Rh Antigens
Antigen Presence:
Types and their Rh factors:
A antigen: Positive if Rh factor is present,
B antigen: Positive if Rh factor is present,
O: Negative by default.
Page 10 - Blood Group Antibodies
Classes of Antibodies:
IgM: Common in blood group antibodies like Anti-A, Anti-B, and Anti-Rh.
IgG: Generally associated with secondary responses.
Page 11 - Blood Typing Methods
Antisera Utilization:
Usage of Anti-Rh and Anti-B antisera to determine blood type.
Monoclonal Antibodies: Highly specific antibodies used in typing.
Safety Info: Recommendations for handling with care to avoid contact with skin or eyes.
Page 12 - Direct Agglutination
Definition: Reaction between antisera and RBCs that leads to agglutination, indicating antigen presence.
Page 13 - Blood Grouping with Cell Type
Focusing on Types:
Forward and Back typing with corresponding antigens and antibodies: A+, B+, AB+, O-.
Page 14 - Documentation of Blood Grouping
Serafol® Document: A structured format to record patient details, including blood group and serological tests performed.
Page 15 - Reverse Blood Grouping
Process: Involves checking unknown antibodies in patient serum against known RBC antigens (A and B).
Page 16 - Blood Grouping with Patient Serum
Application: Utilizing serum types to determine compatibility with known blood group antigens (A, B).
Page 17 - Blood Transfusion and Coagulation
Significance of Coagulation: Understanding the role of clotting factors in blood transfusion efficacy.
Page 18 - ABO Blood Group System Overview
Blood Type Differences:
Anti-A and Anti-B Antibodies present in plasma indicate respective blood groups.
Universal recipients: AB+; Universal donors: O-.
Page 19 - Cross-Match Testing
Procedure: Mixing recipient's serum with donor's red cells and observing agglutination after 15 minutes at room temperature to check compatibility.
Page 20 - Major Cross-Match Testing
Detailed Steps: Utilizing recipient serum with donor red cells for compatibility at various temperatures.
Page 21 - Evaluation of Agglutination in Cross Match
Questions to Address:
Which tubes have agglutinated?
Is the donor compatible with the recipient?
Which class of antibody caused the agglutination?
Indicate testing conditions and outcomes for assessment.