Clinical erythrokinetics: a critical review

Area of Science:

• Hematology
• Red Blood Cell Kinetics

Background:

• Hemoglobin concentration and hematocrit percentage are standard but potentially misleading indicators for diagnosing anemias and erythrocytoses.
• Dehydration or dilution can affect these standard measurements, necessitating consideration of red blood cell mass size.

Purpose of the Study:

• To review the normal and abnormal cellular kinetics of the four erythron compartments.
• To relate these kinetics to the size of the red blood cell mass and the pathogenesis of anemias and erythrocytoses.

Main Methods:

• Review of scientific literature on erythron compartment kinetics.
• Analysis of the relationship between cellular kinetics and red blood cell mass.
• Definition of normal and abnormal kinetics within the erythron.

Main Results:

• Red blood cell mass size is determined by the cellular kinetics of four compartments: stem cells, progenitor cells, precursor cells, and mature cells.
• Under normal conditions, progenitor cell kinetics dictate red blood cell mass size.
• Under abnormal conditions, kinetics of all four compartments can influence red blood cell mass size.

Conclusions:

• Understanding the kinetics of all four erythron compartments is crucial for accurate diagnosis and monitoring of anemias and erythrocytoses.
• Cellular kinetics offer a more comprehensive approach to assessing red blood cell mass than traditional measures alone.