Related Experiment Video

Updated: Aug 13, 2026

Mouse Fetal Liver Culture System to Dissect Target Gene Functions at the Early and Late Stages of Terminal Erythropoiesis
06:40

Mouse Fetal Liver Culture System to Dissect Target Gene Functions at the Early and Late Stages of Terminal Erythropoiesis

Published on: September 9, 2014

Anemia of prematurity: determinants of the erythropoietin response

J A Stockman, J E Graeber, D A Clark

    The Journal of Pediatrics
    |November 1, 1984
    PubMed

    Insights

    In premature infants, low oxygen levels, not just low hemoglobin, drive erythropoietin response during anemia of prematurity. Heart rate is not a reliable anemia indicator.

    Area of Science:

    • Neonatal Medicine
    • Hematology
    • Physiology

    Background:

    • Anemia of prematurity is common in low-birth-weight infants.
    • Understanding erythropoietin response is crucial for managing this condition.

    Purpose of the Study:

    • To identify key factors influencing erythropoietin response in premature infants.
    • To investigate the relationship between oxygen levels, hemoglobin, and erythropoietin.

    Main Methods:

    • Studied 21 low-birth-weight infants in the first weeks of life.
    • Monitored oxygen consumption, hemoglobin levels, and central venous oxygen tension (P-vO2).
    • Measured erythropoietin levels and compared them to normal ranges and other anemic groups.

    Main Results:

    • Erythropoietin response inversely correlated with P-vO2 (r = -0.55, P < 0.001).
    • Elevated erythropoietin observed when P-vO2 fell below 30 torr.
    • Infant erythropoietin levels were lower than in older children with bone marrow failure anemia.
    • Significant erythropoietin elevation occurred below 10.0 gm/dl hemoglobin.
    • Heart rate correlated with oxygen consumption, not anemia presence.

    Conclusions:

    • Central venous oxygen tension is a critical factor in the erythropoietin response in premature infants.
    • Anemia of prematurity involves complex oxygen-related regulation of erythropoietin.
    • Heart rate is not a reliable indicator for detecting anemia in this population.

    More Related Videos

    Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats07:36

    Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats

    Published on: November 20, 2015

    A Rat Model of Mild Intrauterine Hypoperfusion with Microcoil Stenosis06:19

    A Rat Model of Mild Intrauterine Hypoperfusion with Microcoil Stenosis

    Published on: January 7, 2018

    Related Concept Videos

    Erythropoiesis01:14

    Erythropoiesis

    Red blood cells  (RBCs) transport oxygen to all body tissues. These cells survive only for 120 days and then need to be replenished. Erythropoiesis is the process of RBC production. In healthy individuals, erythropoiesis ensures all tissues are amply supplied with oxygen. In addition, blood loss due to injury leads to a drop in the physiological oxygen level that will cause erythropoiesis. Any defect in erythropoiesis leads to several physiological disorders, including thalassemia, anemia, and...
    Role of Hematopoietic Growth Factors01:28

    Role of Hematopoietic Growth Factors

    Hematopoietic growth factors are molecules that regulate the differentiation rate of hematopoietic stem cells (HSCs). Erythropoietin (EPO), primarily produced by the kidneys, plays a crucial role in erythrocyte production. When oxygen levels in the blood are low, EPO is released into the bloodstream, reaching the bone marrow, where it stimulates HSCs to differentiate and mature into erythrocytes, which are vital for oxygen transport.
    Thrombopoietin (TPO), mainly released by the liver,...
    Erythropoiesis01:14

    Erythropoiesis

    Red blood cells  (RBCs) transport oxygen to all body tissues. These cells survive only for 120 days and then need to be replenished. Erythropoiesis is the process of RBC production. In healthy individuals, erythropoiesis ensures all tissues are amply supplied with oxygen. In addition, blood loss due to injury leads to a drop in the physiological oxygen level that will cause erythropoiesis. Any defect in erythropoiesis leads to several physiological disorders, including thalassemia, anemia, and...
    Disorders of Erythrocytes01:27

    Disorders of Erythrocytes

    Disorders of erythrocytes, or red blood cells (RBCs), include a range of conditions affecting their number, shape, or function.
    Erythrocyte disorders can be broadly categorized into two main types: anemic and polycythemic conditions.
    A low oxygen-carrying capacity of the blood due to the loss, lower production, or destruction of erythrocytes is termed anemia. Hemorrhagic anemia, for example, occurs when bleeding from an external wound or internal ulcer reduces erythrocyte counts.
    On the other...
    Rh Blood Group01:19

    Rh Blood Group

    The Rhesus (Rh) antigen is crucial in determining blood groups and ensuring compatibility during blood transfusions.
    Factors Affecting Erythropoiesis01:24

    Factors Affecting Erythropoiesis

    The cardiovascular system regulates the number of erythrocytes in the bloodstream to ensure optimal oxygen transport. It also prevents over-proliferation of these cells, which helps to maintain blood viscosity and flow rate.
    Several factors influence the erythrocyte production rate, with tissue oxygen level being among the most critical. Intense exercise or high altitudes can cause tissue hypoxia, which triggers the kidneys to release more erythropoietin (EPO) into the bloodstream.
    EPO then...