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Blood Flow01:29

Blood Flow

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Blood is pumped by the heart into the aorta, the largest artery in the body, and then into increasingly smaller arteries, arterioles, and capillaries. The velocity of blood flow decreases with increased cross-sectional blood vessel area. As blood returns to the heart through venules and veins, its velocity increases. The movement of blood is encouraged by smooth muscle in the vessel walls, the movement of skeletal muscle surrounding the vessels, and one-way valves that prevent backflow.
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Blood Transfusion and Agglutination02:45

Blood Transfusion and Agglutination

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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...
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Blood Typing01:10

Blood Typing

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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...
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Blood Transfusion01:15

Blood Transfusion

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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...
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Hemodialysis I: Introduction01:25

Hemodialysis I: Introduction

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Hemodialysis (HD) is a medical treatment that artificially removes waste products, excess fluids, and toxins from the blood when the kidneys are no longer able to perform these functions effectively. In this process, blood is filtered through a semipermeable membrane, allowing for the selective removal of waste while preserving necessary components like blood cells and proteins. Hemodialysis is typically performed in patients with end-stage renal disease (ESRD) or severe kidney...
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Video Experimental Relacionado

Updated: Apr 3, 2026

Ex Situ Normothermic Machine Perfusion of Donor Livers
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Ex Situ Normothermic Machine Perfusion of Donor Livers

Published on: May 26, 2015

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La sangre artificial es sangre artificial.

Jerry E Squires1

  • 1American Red Cross Biomedical Services, Arlington, VA 22307, USA. squiresj@usa.redcross.org

Science (New York, N.Y.)
|February 9, 2002
PubMed
Resumen
Este resumen es generado por máquina.

Se están desarrollando sustitutos de la sangre como alternativas a la sangre donada para transfusiones durante emergencias y cirugías. La generación inicial de estos innovadores sustitutos de la sangre se encuentra actualmente en ensayos clínicos.

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Área de la Ciencia:

  • Ingeniería Biomédica Ingeniería Biomédica.
  • Hematología Hematología.
  • Medicina de emergencia Medicina de emergencia.

Sus antecedentes:

  • La escasez de sangre de donantes plantea desafíos significativos en los entornos médicos.
  • La necesidad de alternativas seguras y efectivas a las transfusiones de sangre humana es crítica.
  • Los avances en biotecnología han permitido el desarrollo de sustitutos artificiales de la sangre.

Objetivo del estudio:

  • Para resumir el estado de desarrollo de los sustitutos de la sangre.
  • Para resaltar sus aplicaciones potenciales en medicina transfusional.
  • Informar sobre los ensayos clínicos en curso de la primera generación de sustitutos de la sangre.

Principales métodos:

  • Revisión de la investigación y el desarrollo actuales en tecnología de sustitutos de la sangre.
  • Análisis de datos de ensayos clínicos para productos de primera generación.
  • Evaluación del impacto potencial en la medicina de transfusión.

Principales resultados:

  • La primera generación de sustitutos de la sangre ha llegado a la fase de ensayos clínicos.
  • Estos sustitutos se muestran prometedores para el uso de la transfusión de emergencia y electiva.
  • Se están realizando más investigaciones para optimizar la eficacia y la seguridad.

Conclusiones:

  • Los sustitutos de la sangre representan un avance significativo en la medicina de la transfusión.
  • Los ensayos clínicos son un paso crucial para validar su uso.
  • La aplicación generalizada podría aliviar la dependencia de la sangre de los donantes.