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Polycythemia in the Newborn

By

Andrew W. Walter

, MS, MD, Sidney Kimmel Medical College at Thomas Jefferson University

Last full review/revision Oct 2020| Content last modified Oct 2020
CLICK HERE FOR THE PROFESSONAL VERSION

Polycythemia is an abnormally high concentration of red blood cells.

  • This disorder may result from postmaturity, diabetes in the mother, twin-to-twin transfusions, in which blood flows from one fetus to the other, or a low oxygen level in the fetus's blood.

  • A high concentration of red blood cells makes the blood thick (hyperviscosity) and may slow blood flow through small blood vessels.

  • Most affected newborns do not have symptoms but occasionally have a ruddy or dusky color, are sluggish (lethargic), feed poorly, and very rarely have seizures.

  • The diagnosis is based on a test that measures the amount of red blood cells in the blood.

  • Usually no treatment is needed except to give fluids.

  • When the newborn has symptoms, treatment with a partial exchange transfusion may be given to reduce the concentration of red blood cells.

Red blood cells contain hemoglobin, a protein that gives blood its red color and enables it to carry oxygen from the lungs and deliver it to all body tissues. Oxygen is used by cells to produce energy that the body needs, leaving carbon dioxide as a waste product. Red blood cells carry carbon dioxide away from the tissues and back to the lungs.

Polycythemia may also result if the newborn receives too much blood from the placenta (the organ that connects the fetus to the uterus and provides nourishment to the fetus) at birth, which may occur if the newborn is held below the level of the placenta for too long before the umbilical cord is clamped.

Symptoms of Polycythemia in the Newborn

Diagnosis of Polycythemia in the Newborn

  • Blood test

To diagnose polycythemia, the newborn gets a blood test. If the results of the blood test indicate the newborn has too many red blood cells, the newborn may be treated for polycythemia.

Treatment of Polycythemia in the Newborn

  • Fluids by vein

  • Sometimes partial exchange transfusion

If the newborn has symptoms, some of the newborn’s blood is removed and replaced with an equal amount of saline solution. This procedure, called partial exchange transfusion, dilutes the remaining red blood cells and corrects the polycythemia.

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