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Sugar-water (hemolysis) test

Alternative names:

sucrose hemolysis test

What the risks are:

Risks associated with venipuncture are slight:

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

Special considerations:

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


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