Sugar-water hemolysis test

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Sucrose hemolysis test

Risks associated with having blood drawn are slight:

• excessive bleeding
• fainting or feeling light-headed
• hematoma (blood accumulating under the skin)
• infection (a slight risk any time the skin is broken)
• multiple punctures to locate veins

A negative test does not rule out PNH. False-negative results may occur if the serum is depleted of complement.

Review Date: 04/15/2005
Reviewed By: Rita Nanda, MD, Department of Medicine, Section of Hematology/Oncology, University of Chicago Medical Center, Chicago, IL. Review provided by VeriMed Healthcare Network.