Health Encyclopedia

 

Tests & Procedures



Mercury (Blood)

Mercury (Blood)

Does this test have other names?

Hg level

What is this test?

This test measures the amount of mercury in your blood.

Mercury is a heavy metal that can be toxic. It occurs naturally as a liquid at room temperature and as an odorless vapor.

You can be exposed to mercury from polluted air or water, if you work in an industry that still uses mercury, from eating fish that are high in mercury, and from some complementary and alternative health remedies. 

Long-term exposure to mercury can cause kidney and brain damage in adults. Exposure to mercury during pregnancy can cause permanent damage to the developing fetus. Breastfeeding may also expose infants to mercury.

Children who are exposed to mercury can suffer damage to their kidneys, nervous system, and digestive system.

Mercury is also present in silver amalgam dental fillings. Minute amounts of mercury may be absorbed from these fillings, but this amount is not likely to cause health problems.

Why do I need this test?

You may have this test if your doctor suspects that you have mercury poisoning. Symptoms include:

  • Fever

  • Chills

  • Chest tightness

  • Shortness of breath

Inhaling mercury can cause:

  • Nausea

  • Diarrhea

  • Vomiting

  • Burning sensation in your mouth

You may also need this test to monitor your safety if it's possible that you could be exposed to mercury at your work. 

You may also have this test if you are pregnant or breastfeeding and have been exposed to high levels of mercury.

What other tests might I have along with this test?

Your doctor may also order tests of your urine or breast milk to measure for mercury. He or she may also test hair from your scalp to measure mercury exposure.

What do my test results mean?

Many things may affect your lab test results. These include the method each lab uses to do the test. Even if your test results are different from the normal value, you may not have a problem. To learn what the results mean for you, talk with your health care provider.

The results of this test are given in nanograms per milliliter (ng/mL). Having some mercury in your blood does not necessarily mean you will develop health problems.

Here is the breakdown on higher results:

  • 5 ng/mL: This may mean you are being exposed to unhealthy levels of mercury at your work or in your diet.

  • 30 to 40 ng/mL: This level usually causes some symptoms and some brain or kidney damage.

  • Above 100 ng/mL: This is considered mercury poisoning.

How is this test done?

The test requires a blood sample, which is drawn through a needle from a vein in your arm.

Does this test pose any risks?

Taking a blood sample with a needle carries risks that include bleeding, infection, bruising, or feeling dizzy. When the needle pricks your arm, you may feel a slight stinging sensation or pain. Afterward, the site may be slightly sore.

What might affect my test results?

Certain Chinese herbal preparations or skin-lightening creams that contain mercury can cause your blood level to rise. Eating fish and shellfish that contain high levels of mercury can increase your mercury levels.

How do I get ready for this test?

You don't need to prepare for this test.

 

 
Related Items
Content Type 167
  Acetylcholine Receptor Antibody (Blood)
  Albumin (Blood)
  Alpha-Fetoprotein (Blood)
  Alpha-Fetoprotein Tumor Marker (Blood)
  Ammonia
  Amphetamine Screen (Blood)
  Amylase (Blood)
  Angiotensin Converting Enzyme (Blood)
  Antidiuretic Hormone
  Antimitochondrial Antibody and Antimitochondrial M2 Antibody
  Apolipoprotein A
  Apolipoprotein B100
  Benzodiazepines (Blood)
  Bicarbonate
  Direct Bilirubin
  BNP (Blood)
  C-Peptide (Blood)
  CA 125
  CA 19-9
  CA 27-29
  Calcium (Blood)
  Carcinoembryonic Antigen
  Cardiac Biomarkers (Blood)
  Total and Free Carnitine
  Catecholamines (Blood)
  Ceruloplasmin (Blood)
  Chloride
  Cholesterol
  Cholinesterase (Blood)
  Clonazepam Drug Level (Blood)
  Creatine Kinase (Blood)
  Creatinine Clearance
  Creatinine (Blood)
  Cystatin C
  D-Dimer
  Dehydroepiandrosterone and Dehydroepiandrosterone Sulfate
  Digoxin Drug Level
  Erythropoietin (Blood)
  Estradiol (Blood)
  Ethanol (Blood)
  Ferritin (Blood)
  Fluphenazine Drug Level (Blood)
  Folate
  Follicle-Stimulating Hormone
  Free Androgen Index
  Gastrin
  Growth Hormone with Stimulation (Blood)
  Growth Hormone with Suppression (Blood)
  Growth Hormone (Blood)
  HCG (Blood)
  HDL Cholesterol
  Insulin-Like Growth Factor
  Total and Free Insulin (Blood)
  Iron (Blood)
  Iron and Total Iron-Binding Capacity
  Ketone Bodies (Blood)
  Lactose Tolerance (Blood)
  LDL Cholesterol
  Adult Lead (Blood)
  Lead (Blood)
  Leptin (Blood)
  Lipase
  Lipid Panel with Non-HDL Cholesterol
  Lipoprotein-Associated Phospholipase A2
  Lithium
  Lipoprotein(a) Cholesterol
  Luteinizing Hormone (Blood)
  Magnesium (Blood)
  Metanephrines (Blood)
  Methylmalonic Acid (Blood)
  Myoglobin (Blood)
  Pancreatic Polypeptide
  Parathyroid Hormone
  Progesterone
  Proinsulin (Blood)
  Prolactin (Blood)
  Salicylate (Blood)
  Free Light Chains (Blood)
  Sodium (Blood)
  Free and Bound Triiodothyronine (Blood)
  Free and Bound T4
  Tartrate-Resistant Acid Phosphatase
  Tegretol (Blood)
  Free Testosterone
  Total Testosterone
  Theophylline
  Thyroid Antibody
  Thyroid Antithyroglobulin Antibody
  Thyroid Stimulating Hormone
  Total Copper (Blood)
  Transferrin
  Tricyclic Antidepressant Screen
  Triglycerides
  Troponin
  Trypsin (Blood)
  Blood Urea Nitrogen
  Uric Acid (Blood)
  VLDL Cholesterol