Hyperviscosity - newborn
Hyperviscosity of the newborn is the slowing and blockage of blood flow that results when there are too many red blood cells in an infant's blood.
Hyperviscosity can occur when the percentage of red blood cells (RBCs) in the infant's blood,, called the "hematocrit," is greater than 65%. This may result from various conditions that develop before birth, such as:
The extra RBCs can block the flow of blood in the smallest blood vessels. This may lead to tissue death from lack of oxygen. This blocked blood flow can affect all organs, including the kidneys, lungs, and brain.
Symptoms may include:
Exams and Tests
There may be signs of breathing problems, kidney failure, and newborn jaundice.
If the baby has symptoms of hyperviscosity, a blood test to count the number of red blood cells will be done. This test is called a hematocrit.
Other tests may include:
The baby will be monitored for complications of hyperviscosity. If needed, an exchange transfusion will be done to lower the amount of red blood cells that are moving through the baby's blood vessels.
Other treatment may include increasing body fluids.
The outlook is good for infants with mild hyperviscosity and those who receive treatment for severe hyperviscosity.
Some children may have mild changes in neurological development. Parents who believe their child may show any signs of developmental delay should contact their health care provider.
Complications may include:
Review Date: 6/17/2011
Reviewed By: Kimberly G Lee, MD, MSc, IBCLC, Associate Professor of Pediatrics, Division of Neonatology, Medical University of South Carolina, Charleston, SC. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.