Lead concentration in blood is reported in which unit?

Lead concentration in blood is reported in which unit?

• A. Micrograms per liter (ug/L)
• B. Micrograms per deciliter (ug/dL)
• C. Micrograms per gram (ug/g)
• D. Milligrams per deciliter (mg/dL)

Answer: (B)

Lead in blood is measured in micrograms per deciliter because the levels are typically very small, and expressing them in µg/dL keeps the numbers in a convenient, easy-to-interpret range for clinical and public health reference values. If we used micrograms per liter, the values would be about ten times larger, making the commonly used action levels and thresholds less intuitive. Using milligrams per deciliter would yield numbers that are awkwardly small (often less than one in many cases), which isn’t practical for routine reporting. Micrograms per gram isn’t a standard way to report blood concentrations. So, micrograms per deciliter is the standard unit for reporting blood lead levels.

Lead in blood is measured in micrograms per deciliter because the levels are typically very small, and expressing them in µg/dL keeps the numbers in a convenient, easy-to-interpret range for clinical and public health reference values. If we used micrograms per liter, the values would be about ten times larger, making the commonly used action levels and thresholds less intuitive. Using milligrams per deciliter would yield numbers that are awkwardly small (often less than one in many cases), which isn’t practical for routine reporting. Micrograms per gram isn’t a standard way to report blood concentrations. So, micrograms per deciliter is the standard unit for reporting blood lead levels.