rhesus factor

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rhesus factor

A doctor explains the rhesus factor to a patient using a simple chart.

Definition

Noun: 1. A specific antigen present on the surface of red blood cells: The Rhesus factor is a type of protein (antigen) found on the surface of red blood cells in most people. Its presence or absence determines a person's Rh blood type (Rh-positive or Rh-negative). 2. A critical determinant in blood compatibility: This factor is a key consideration in blood transfusions and pregnancy, as incompatibility between Rh-positive and Rh-negative blood can cause a serious immune reaction.

Usage Examples
  • Noun:
    • The doctor tested her blood to determine her Rhesus factor.
    • A mismatch in the Rhesus factor between mother and fetus can lead to complications.
    • Blood banks always screen for the Rhesus factor to ensure safe transfusions.
Advanced Usage
  • "Rh factor": This is the common abbreviated term for the Rhesus factor.
    • Her blood type is O negative, meaning she lacks the Rh factor.
  • "Rhesus disease" or "Hemolytic disease of the newborn (HDN)": A condition that can occur when an Rh-negative mother carries an Rh-positive baby, leading to the mother's immune system attacking the baby's red blood cells.
    • The injection of Rh immunoglobulin can prevent Rhesus disease.
Variants and Related Words
  • Rh-positive (adj): Describes blood that contains the Rhesus factor antigen.
    • Approximately 85% of the population is Rh-positive.
  • Rh-negative (adj): Describes blood that lacks the Rhesus factor antigen.
    • Individuals with Rh-negative blood must receive Rh-negative blood in transfusions.
  • Rhesus (Rh) antigen: The specific protein identified as the Rhesus factor.
  • Rh incompatibility: The condition arising from a mismatch of the Rhesus factor.
Synonyms
  • Rh factor (This is the standard synonym in medical contexts.)
  • Rh antigen
Related Phrases and Terms
  • Rh typing: The process of testing blood to determine the presence or absence of the Rhesus factor.
    • Rh typing is a standard part of prenatal blood work.
  • Rh immune globulin (RhIg): A medication given to Rh-negative individuals to prevent the development of antibodies against the Rhesus factor.
    • An Rh-negative mother received Rh immune globulin after delivery.
rhesus factor

A doctor explains the rhesus factor to a patient using a simple chart.

Noun
  1. a blood group antigen possessed by Rh-positive people; if an Rh-negative person receives a blood transfusion from an Rh-positive person it can result in hemolysis and anemia

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