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Related Concept Videos

Blood Transfusion and Agglutination02:45

Blood Transfusion and Agglutination

Blood transfusion is a therapeutic measure to restore the blood volume after extensive blood loss due to an accident or a medical procedure. Blood transfusion involves drawing a certain amount of blood from a suitable donor and infusing it into the recipient.
History
The history of blood transfusion dates back to the 17th century, when early attempts were made in animals. In 1818 James Blundell, a British doctor, performed the first successful human blood transfusion. Later in 1900, Karl...
Hypersensitivity Reactions: Cytolytic Reactions01:01

Hypersensitivity Reactions: Cytolytic Reactions

Type II hypersensitivity involves IgG and IgM antibodies targeting cell surface antigens, leading to cell destruction. This can occur through complement activation, antibody-dependent cell-mediated cytotoxicity (ADCC), or acting as opsonins for phagocytosis. When excessive, these reactions cause significant tissue damage.Drug-induced hemolytic anemia is a common example, where drugs like penicillin or cephalosporins bind to red blood cells, forming drug-protein complexes. These complexes...
Blood Transfusion01:15

Blood Transfusion

Blood transfusion is a critical medical procedure that saves lives and treats various medical conditions. It involves transferring blood from a donor to a recipient. This process requires a thorough understanding of the ABO blood group system and its associated antigens and antibodies.
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A blood transfusion is a medical procedure used to replace blood lost due to injury, surgery, or to treat conditions such as anemia or cancer. During a transfusion, donor blood is...
Rh Blood Group01:19

Rh Blood Group

The Rhesus (Rh) antigen is crucial in determining blood groups and ensuring compatibility during blood transfusions.
Drug Toxicity: Allergic Reactions01:30

Drug Toxicity: Allergic Reactions

Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial exposure to a...
Hypersensitivity Reactions: Immune-Complex Reactions01:19

Hypersensitivity Reactions: Immune-Complex Reactions

Type III hypersensitivity reactions occur when antigen–antibody complexes form and activate the complement system. Normally, these complexes help the clearance of antigens by phagocytes and red blood cells. However, when large numbers of immune complexes are present, they can deposit in tissues—particularly in the walls of blood vessels—leading to inflammation and tissue injury. These deposits trigger complement activation and neutrophil recruitment, resulting in serum sickness, a systemic...

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Updated: Jun 2, 2026

Antigens Protected Functional Red Blood Cells By The Membrane Grafting Of Compact Hyperbranched Polyglycerols
11:31

Antigens Protected Functional Red Blood Cells By The Membrane Grafting Of Compact Hyperbranched Polyglycerols

Published on: January 2, 2013

Hemolytic Transfusion Reactions.

Erwin Strobel1

  • 1Department Medizinische Mikrobiologie, Immunologie und Krankenhaushygiene, Medizet, Städtisches Klinikum München GmbH, Germany.

Transfusion Medicine and Hemotherapy : Offizielles Organ Der Deutschen Gesellschaft Fur Transfusionsmedizin Und Immunhamatologie
|April 23, 2011
PubMed
Summary
This summary is machine-generated.

Hemolytic transfusion reactions (HTRs), occurring at about 1:70,000 units, result from incompatible red blood cells or plasma. These reactions involve complex immune mechanisms leading to serious complications like shock and organ failure.

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Methods for Quantitative Detection of Antibody-induced Complement Activation on Red Blood Cells
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Methods for Quantitative Detection of Antibody-induced Complement Activation on Red Blood Cells

Published on: January 29, 2014

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Last Updated: Jun 2, 2026

Antigens Protected Functional Red Blood Cells By The Membrane Grafting Of Compact Hyperbranched Polyglycerols
11:31

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Methods for Quantitative Detection of Antibody-induced Complement Activation on Red Blood Cells
06:29

Methods for Quantitative Detection of Antibody-induced Complement Activation on Red Blood Cells

Published on: January 29, 2014

Area of Science:

  • Transfusion Medicine
  • Immunology
  • Pathophysiology

Background:

  • Hemolytic transfusion reactions (HTRs) pose a significant risk, occurring in approximately 1 in 70,000 transfused units.
  • HTRs can be acute, typically due to incompatible red blood cells (RBCs) or plasma, or delayed, resulting from secondary immune responses.
  • Both intra- and extravascular hemolysis mechanisms contribute to HTRs, involving complement activation, phagocytosis, and immune cell interactions.

Purpose of the Study:

  • To elucidate the mechanisms underlying acute and delayed hemolytic transfusion reactions.
  • To describe the pathophysiological pathways leading to the clinical consequences of HTRs.
  • To outline symptoms, diagnostic investigations, treatment strategies, and preventive measures for HTRs.

Main Methods:

  • Review of pathophysiological mechanisms of hemolysis in HTRs.
  • Analysis of immune responses involving complement and cellular interactions.
  • Description of clinical manifestations and systemic effects of HTRs.

Main Results:

  • Incompatible RBC transfusion is the primary cause of acute HTRs, while delayed HTRs involve secondary immune responses.
  • HTRs trigger severe systemic effects including inflammatory responses, hypotension, disseminated intravascular coagulation, and renal failure.
  • Multiple immune pathways, including complement activation and IgG-mediated cell destruction, contribute to hemolysis.

Conclusions:

  • Understanding HTR mechanisms is crucial for effective prevention and management.
  • Prompt recognition and intervention are vital to mitigate severe complications of HTRs.
  • Adherence to transfusion guidelines and protocols is essential for minimizing HTR risks.