Korean J Blood Transfus.  2018 Dec;29(3):229-239. 10.17945/kjbt.2018.29.3.229.

Effect of Blood Donation on the Donor's Hemorheological Properties

• Lee BK

• KMID: 2435617
• DOI: http://doi.org/10.17945/kjbt.2018.29.3.229

Abstract

The circulatory system is closely related to the inter-relationship between the anatomy of the heart and blood vessels, and the fluid dynamic properties of blood. The physical properties of blood, which affect blood flow, are called hemorheologic factors. Hemorheologic factors, such as blood viscosity and erythrocyte aggregation, are influenced mainly by hematocrit. A higher hematocrit level results in an increase in blood viscosity, erythrocyte aggregation, which impedes the circulation itself, and tissue oxygenation. An excess of serum ferritin causes injury to vascular endothelial cells and erythrocytes via oxygen free radicals. In addition, an excess of blood can aggravatee the adverse effects of the hemorheologic parameters and induce atherogenesis, microcirculatory disturbances, and major cardiovascular events. A preventive and therapeutic approach with a phlebotomy or blood donation has been stimulated by the knowledge that blood loss, such as regular donations, is associated with significant decreases in key hemorheologic variables, including blood viscosity, erythrocyte aggregation, hematocrit, and fibrinogen. Major cardiovascular events have been improved in regular blood donors by improving blood flow and microcirculation by decreasing the level of oxidative stress, improving the hemorheologic parameters, and reducing the serum ferritin level. Confirmation of the positive preventive and therapeutic effects of blood donations on cardiovascular disease by a well-designed and well-controlled Cohort study may be good news to patients with cardiovascular disease or at risk of these diseases, as well as patients who require a transfusion.

Keyword

Blood viscosity; Erythrocyte aggregation; Hematocrit; ferritin; Blood donors

MeSH Terms

Atherosclerosis
Blood Donors*
Blood Vessels
Blood Viscosity
Cardiovascular Diseases
Cohort Studies
Endothelial Cells
Erythrocyte Aggregation
Erythrocytes
Ferritins
Fibrinogen
Free Radicals
Heart
Hematocrit
Humans
Hydrodynamics
Microcirculation
Oxidative Stress
Oxygen
Phlebotomy
Therapeutic Uses
Ferritins
Fibrinogen
Free Radicals
Oxygen
Therapeutic Uses