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Blood Transfusion and Agglutination

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 Transfusion

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...

Veins as Blood Reservoirs

Veins as Blood Reservoirs

Veins, while chiefly responsible for circulating blood back to the heart, also function as storage vessels for blood. They house approximately 64 percent of the body's total blood volume, a feat made possible by their high capacitance—the inherent ability to expand and accommodate large volumes of blood, even under low pressure. The large diameter and thin walls of veins augment their distensibility, significantly more so than arteries, due to their classification as capacitance vessels. When...

Blood Flow

Blood Flow

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.

Rh Blood Group

Rh Blood Group

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

Characteristics and Functions of Blood

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...

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Related Experiment Video

Updated: Jun 24, 2026

Integrated Compensatory Responses in a Human Model of Hemorrhage

Integrated Compensatory Responses in a Human Model of Hemorrhage

Published on: November 20, 2016

Rationale for blood conservation.

Lawrence T Goodnough¹

¹Department of Pathology and Medicine, Transfusion Service, Stanford University Medical Center, Stanford, California 94305-5626, USA. Ltgoodno@stanford.edu

Surgical Infections

|March 17, 2009

Summary

This summary is machine-generated.

Minimizing allogeneic blood transfusions requires effective blood conservation techniques. Pharmacologic stimulation of erythropoiesis shows promise for achieving bloodless medicine, while artificial blood substitutes are still under development.

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Continuous Manual Exchange Transfusion for Patients with Sickle Cell Disease: An Efficient Method to Avoid Iron Overload

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Last Updated: Jun 24, 2026

Integrated Compensatory Responses in a Human Model of Hemorrhage

Integrated Compensatory Responses in a Human Model of Hemorrhage

Published on: November 20, 2016

Continuous Manual Exchange Transfusion for Patients with Sickle Cell Disease: An Efficient Method to Avoid Iron Overload

Continuous Manual Exchange Transfusion for Patients with Sickle Cell Disease: An Efficient Method to Avoid Iron Overload

Published on: March 14, 2017

Area of Science:

Transfusion Medicine
Surgical Blood Conservation

Background:

Allogeneic blood transfusions can be reduced or eliminated using systematic blood conservation techniques.
The application of these established blood conservation technologies is inconsistent.

Purpose of the Study:

To review current blood conservation strategies and their effectiveness.
To explore emerging pharmacologic and artificial blood substitute alternatives.

Main Methods:

A review of relevant English-language literature was conducted.

Main Results:

Preoperative autologous blood donation (PAD) enthusiasm has waned due to cost and inconvenience.
Acute normovolemic hemodilution (ANH) offers advantages but lacks widespread adoption.
Pharmacologic options include erythropoietin, iron, and artificial oxygen carriers.

Conclusions:

Pharmacologic stimulation of erythropoiesis presents a significant opportunity for advancing bloodless medicine.
The clinical utility and potential of artificial blood substitutes are still under investigation.