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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...
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.
Blood Transfusion Overview
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...
Characteristics and Functions of Blood01:26

Characteristics and Functions of Blood

Blood is specialized connective tissue comprising about 8% of the body mass. It has a thick, liquid extracellular matrix that contains cells, dissolved proteins, and electrolytes, making it five times more viscous than water. Blood is warm, around 38°C, and has an alkaline pH ranging from 7.35 to 7.45.
The primary function of blood is to transport oxygen and carbon dioxide between tissues and the lungs. Oxygenated blood is bright red, while oxygen-depleted blood is darker. It also carries...
Rh Blood Group01:19

Rh Blood Group

The Rhesus (Rh) antigen is crucial in determining blood groups and ensuring compatibility during blood transfusions.
Blood Types02:20

Blood Types

Human blood is classified into different types based on the presence of antigens on the red blood cell's surface and antibodies in the plasma. Proper identification of blood type is essential for successful blood transfusion. The International Society of Blood Transfusion has identified 38 human blood types based on the surface antigens on the red blood cells. The most common types are ABO, Rh, and MNS blood types.
ABO blood group
ABO antigens are glycoproteins encoded by genes present on...
Blood Typing01:10

Blood Typing

Understanding an individual's blood group is a critical component of transfusion medicine. It ensures compatibility in blood transfusions, organ transplants, and even during pregnancy. Determining these blood groups involves the ABO and Rh blood typing systems, utilizing specific antigens and corresponding anti-sera to identify an individual's blood type.
Antigens are protein molecules that reside on the surface of red blood cells (RBCs). The ABO and Rh blood typing systems target antigens A,...

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Related Experiment Video

Updated: Jun 17, 2026

Dried Blood Spot Collection of Health Biomarkers to Maximize Participation in Population Studies
07:20

Dried Blood Spot Collection of Health Biomarkers to Maximize Participation in Population Studies

Published on: January 28, 2014

How safe is blood, really?

Harvey G Klein1

  • 1Department of Transfusion Medicine, Clinical Center, Building 10, Room 1C-711, National Institutes of Health, Bethesda, MD 20892, USA. hklein@dtm.cc.nih.gov

Biologicals : Journal of the International Association of Biological Standardization
|January 16, 2010
PubMed
Summary
This summary is machine-generated.

Blood transfusions are safer but still carry risks, including infectious events and unknown long-term effects. Enhancing blood safety requires investment, especially in developing nations, as no method ensures zero risk.

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Area of Science:

  • Transfusion Medicine
  • Hematology
  • Public Health

Background:

  • Blood transfusion has evolved from a risky intervention to essential supportive care.
  • Despite advancements, disparities in access and safety persist due to socioeconomic and geographic factors.
  • Understanding transfusion risks, both known and unknown, is crucial for patient safety.

Purpose of the Study:

  • To review the current state of blood safety.
  • To identify known and unknown risks associated with blood transfusions.
  • To discuss strategies for improving blood safety globally.

Main Methods:

  • Literature review of transfusion medicine advancements and risks.
  • Analysis of infectious and immunologic risks per blood unit.
  • Evaluation of emerging pathogens and storage-related toxicity.
  • Discussion of national registry data on transfusion impact.
  • Assessment of novel technologies and their cost-effectiveness.

Main Results:

  • Known risks like infectious and immunologic events are quantifiable but vary by component.
  • Unknown risks include emerging pathogens and potential toxicity from processing or storage.
  • Transfusion may not significantly impact mortality beyond the initial weeks post-administration.
  • Novel pathogens, allogeneic stimulation, and cytokine/chemokine infusion may have unrecognized consequences.
  • Significant blood safety improvements are achievable with modest investment in developing countries.

Conclusions:

  • Blood transfusion safety has improved but remains non-linear and carries inherent risks.
  • Addressing disparities and investing in developing countries can dramatically enhance blood safety.
  • While advanced technologies offer marginal safety gains at high costs, no strategy guarantees absolute safety.
  • Ongoing vigilance for emerging risks and long-term consequences is essential.