网织红细胞计数

定义

Reticulocytes are slightly immature red blood cells. A reticulocyte count is a blood test that measures the amount of these cells in the blood.

选择的名字

Anemia - reticulocyte

How the Test is Performed

A 血液样本 是必要的.

How to Prepare for the Test

No special preparation is necessary.

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

The test is done to determine if red blood cells are being created in the bone marrow at an appropriate rate. The number of reticulocytes in the blood is a sign of how quickly they are being produced and released by the bone marrow.

正常的结果

A normal result for healthy adults who are not anemic is 0.5% to 2.5%.

The normal range depends on your blood level of hemoglobin. Hemoglobin is a protein in red blood cells that carries oxygen. The range is higher if hemoglobin is low, from bleeding or if red cells are destroyed.

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

What Abnormal Results Mean

A higher than normal reticulocyte count may indicate:

• Anemia due to red blood cells being destroyed earlier than normal (溶血性贫血)
• 出血
• Blood disorder in a fetus or newborn (erythroblastosis fetalis)
• Kidney cysts or tumors, with increased production of a hormone called 促红细胞生成素
• 怀孕

A lower than normal reticulocyte count may indicate:

• Anemia caused by low iron levels, or low levels of vitamin B12 or folate
• Bone marrow failure (for example, from a certain drug, tumor, radiation therapy, or infection)
• Chronic kidney disease, due to decreased amounts of a key hormone
• Cirrhosis of the liver

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

Chernecky CC, Berger BJ. 网织红细胞计数-blood. In: Chernecky CC, Berger BJ, eds. Laboratory Tests and Diagnostic Procedures. 6日艾德. Philadelphia, PA: Elsevier; 2013:980-981.

Culligan D, Watson HG. Blood and bone marrow. In: Cross SS, ed. Underwood's Pathology. 7日艾德. Philadelphia, PA: Elsevier; 2019:chap 23.

林JC. Approach to anemia in the adult and child. In: Hoffman R, Benz EJ, Silberstein LE, et al, eds. Hematology: Basic Principles and Practice. 7日艾德. Philadelphia, PA: Elsevier; 2018:chap 34.

意味着RT. Approach to the anemias. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 26日艾德. Philadelphia, PA: Elsevier; 2020:chap 149.