Sugar-water hemolysis test

定义

The sugar-water hemolysis test is a blood test to detect fragile red blood cells. It does this by testing how well they withstand swelling in a sugar (sucrose) solution.

选择的名字

Sucrose hemolysis test; Hemolytic anemia sugar water hemolysis test; Paroxysmal nocturnal hemoglobinuria sugar water hemolysis test; PNH sugar water hemolysis test

How the Test is Performed

A 血液样本 是必要的.

How to Prepare for the Test

There is no special preparation needed for this test.

How the Test will Feel

When the needle is inserted to draw blood, some people feel moderate pain. Others feel only a prick or stinging. Afterward, there may be some throbbing or a slight bruise. 这很快就会消失.

Why the Test is Performed

Your health care provider may recommend this test if you have signs or symptoms of paroxysmal nocturnal hemoglobinuria (PNH)或 溶血性贫血 原因不明. Hemolytic anemia is a condition in which red blood cells die before they should. PNH red blood cells are very likely to be harmed by the body's complement system. The complement system is proteins that move through the bloodstream. These proteins work with the immune system.

正常的结果

A normal test result is called a negative result. A normal result shows that less than 5% of red blood cells break down when tested. This breakdown is called hemolysis.

A negative test does not rule out PNH. False-negative results may occur if the fluid part of blood (serum) lacks complement.

Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your provider about the meaning of your specific test results.

What Abnormal Results Mean

A positive test result means the results are abnormal. In a positive test, more than 10% of red blood cells break down. It could indicate the person has PNH.

Certain conditions can make the test results appear positive (called "false positive"). These conditions are autoimmune 溶血性贫血s and leukemia.

风险

There is little risk involved with having your blood taken. Veins and arteries vary in size from one person to another and from one side of the body to the other. Taking blood from some people may be more difficult than from others.

Other risks associated with having blood drawn are slight, but may include:

• 大出血
• Fainting or feeling lightheaded
• Multiple punctures to locate veins
• Hematoma (blood buildup under the skin)
• Infection (a slight risk any time the skin is broken)

参考文献

布罗斯基拉. Paroxysmal nocturnal hemoglobinuria. In: Hoffman R, Benz EJ, Silberstein LE, eds. Hematology: Basic Principles and Practice. 7日艾德. Philadelphia, PA: Elsevier; 2018:chap 31.

Elghetany MT, Banki K. Erythrocytic disorders. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24日艾德. Philadelphia, PA: Elsevier; 2022:chap 33.

加拉格尔PG. Hemolytic anemias: red blood cell membrane and metabolic defects. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 26日艾德. Philadelphia, PA: Elsevier; 2020:chap152.