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Related Concept Videos

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...
Hypoxia01:23

Hypoxia

Hypoxia is a medical condition characterized by an inadequate oxygen supply to body tissues. It typically manifests as a bluish discoloration of the skin and mucosae, especially in fair-skinned individuals, when hemoglobin (Hb) saturation drops below 75%.
Types of Hypoxia
There are four primary types of hypoxia, each resulting from a different cause:
1. Anemic hypoxia: This type occurs due to insufficient oxygen delivery caused by a lack of red blood cells (RBCs) or RBCs with abnormal or...
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...
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...
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...
Hemoglobin01:24

Hemoglobin

Hemoglobin is a globular protein made up of four subunits. Two of these subunits are alpha chains, and the other two are beta chains. Each subunit contains a molecule of heme, which has an iron atom and can bind to oxygen. When an oxygen molecule binds to one heme group, it changes the shape of hemoglobin, making it easier for the other heme groups to bind oxygen as well.
When all four heme groups are bound to oxygen, the resulting molecule is called oxyhemoglobin. As a result, arterial blood...

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Measurement of Heme Synthesis Levels in Mammalian Cells
09:43

Measurement of Heme Synthesis Levels in Mammalian Cells

Published on: July 9, 2015

The hypochromic anemias.

M A Ali

    Canadian Family Physician Medecin De Famille Canadien
    |May 15, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Hypochromic anemia, common in family practice, requires assessing tissue iron stores before iron treatment. Tests like serum ferritin and bone marrow iron evaluation help distinguish iron deficiency from other causes.

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    Area of Science:

    • Hematology
    • Family Medicine

    Background:

    • Hypochromic anemia is a frequent diagnosis in family practice.
    • Iron deficiency is the most common cause, but other conditions like thalassemia, secondary anemia, and sideroblastic anemia present similarly.
    • Accurate diagnosis is crucial as inappropriate iron supplementation can be detrimental.

    Purpose of the Study:

    • To highlight the diagnostic challenges in hypochromic anemia.
    • To emphasize the importance of assessing tissue iron status before initiating iron therapy.
    • To recommend specific diagnostic tests for differentiating causes of hypochromic anemia.

    Main Methods:

    • Review of common causes of hypochromic anemia in a family practice setting.
    • Discussion of diagnostic limitations without assessing tissue iron.
    • Recommendation of key laboratory and procedural tests.

    Main Results:

    • Iron deficiency cannot be reliably distinguished from other hypochromic anemia causes solely on clinical grounds.
    • Tissue iron stores are the definitive indicator for differentiating causes.
    • Specific tests are essential for accurate etiological diagnosis.

    Conclusions:

    • Treatment with iron for hypochromic anemia should be guided by confirmed iron deficiency.
    • Serum ferritin, bone marrow iron assessment, serum iron, and iron-binding capacity are recommended diagnostic tools.
    • Accurate diagnosis prevents unnecessary or incorrect iron therapy.