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Haptoglobin blood test

 

The haptoglobin blood test measures the level of haptoglobin in your blood.

Haptoglobin is a protein produced by the liver. It attaches to a certain type of hemoglobin in the blood. Hemoglobin is a blood cell that carries oxygen.

How the Test is Performed

A blood sample is needed.

How to Prepare for the Test

 

Certain medicines may affect the results of this test. Your health care provider will tell you if you need to stop taking any medicines. DO NOT stop any medicine before talking to your provider.

Drugs that can raise haptoglobin levels include:

  • Androgens
  • Corticosteroids

Drugs that can lower haptoglobin levels include:

  • Birth control pills
  • Chlorpromazine
  • Diphenhydramine
  • Indomethacin
  • Isoniazid
  • Nitrofurantoin
  • Quinidine
  • Streptomycin

 

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. This soon goes away.

 

Why the Test is Performed

 

This test is done to see how fast your red blood cells are destroyed. It may be done if your provider suspects you have a type of anemia that your immune system is causing.

 

Normal Results

 

The normal range is 41 to 165 milligrams per deciliter (mg/dL) or 410 to 1650 milligrams per liter (mg/L).

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

 

When red blood cells are actively being destroyed, haptoglobin disappears faster than it is created. As a result, the levels of haptoglobin in the blood drop.

Lower than normal levels may be due to:

  • Immune hemolytic anemia
  • Chronic liver disease
  • Blood buildup under the skin (hematoma)
  • Liver disease
  • Transfusion reaction

Higher-than-normal levels may be due to:

  • Blockage of the bile ducts
  • Joint or muscle inflammation, swelling, and pain that comes on suddenly
  • Peptic ulcer
  • Ulcerative colitis
  • Other inflammatory conditions

 

Risks

 

There is very 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:

  • Excessive bleeding
  • Fainting or feeling lightheaded
  • Hematoma (blood accumulating under the skin)
  • Infection (a slight risk any time the skin is broken)

 

 

References

Michel M. Autoimmune and intravascular hemolytic anemias In: Goldman L, Schafer AI, eds. Goldman's Cecil Medicine . 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 160.

Sheehan AM, Yee DL. Resources for the hematologist: interpretive comments and selected reference values for neonatal, pediatric, and adult populations. In: Hoffman R, Benz EJ Jr, Silberstein LE, Heslop HE, Weitz JI, Anastasi J, eds. Hematology: Basic Principles and Practice . 6th ed. Philadelphia, PA: Elsevier Saunders; 2013:chap 164.

Wetzler M, Cornett PA. Hematology. In: Bope ET, Kellerman RD, eds. Conn's Current Therapy 2016 . Philadelphia, PA: Elsevier Saunders; 2016:section 12.

 

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              Review Date: 2/11/2016

              Reviewed By: Todd Gersten, MD, Hematology/Oncology, Florida Cancer Specialists & Research Institute, Wellington, FL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

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