Blood lead level
Blood Lead Level
Blood lead level (BLL), pronounced /blʌd lɛd lɛvəl/, is a measure of the concentration of lead in the blood, typically given in micrograms of lead per deciliter of blood (µg/dL). The term originates from the English words "blood" (from Old English blōd), "lead" (from Old English lēad), and "level" (from Old English læfel).
Overview
The blood test for BLL is used to screen for lead poisoning, a serious and sometimes fatal condition that can occur when lead builds up in the body over a period of months or years. Lead is a toxic metal that can cause serious health problems if it's ingested or if dust containing lead is inhaled.
Measurement
The BLL is measured using a blood sample, which is usually taken from a vein in the arm. The sample is then analyzed in a laboratory to determine the amount of lead present. The results are usually reported in micrograms of lead per deciciliter of blood (µg/dL).
Interpretation
The Centers for Disease Control and Prevention (CDC) has set the reference BLL for adults at 5 µg/dL. Levels above this are considered elevated and may indicate lead exposure or poisoning. For children, the reference level is also 5 µg/dL, as children are more susceptible to the effects of lead.
Related Terms
- Lead poisoning: A medical condition caused by increased levels of lead in the body.
- Chelation therapy: A treatment for lead poisoning that involves the administration of chelating agents to remove lead from the body.
- Environmental health: The branch of public health that focuses on the relationships between people and their environment, especially how it affects their health.
See Also
- Heavy metal (toxicology): A type of toxic substance that includes lead and other heavy metals.
- Occupational health: The field of health care dedicated to the well-being and safety of workers, particularly through the prevention and treatment of diseases and injuries that are caused by a work environment.
External links
- Medical encyclopedia article on Blood lead level
- Wikipedia's article - Blood lead level
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