Since only a 150 μL sample volume is required, it may also not be necessary to draw venous blood to measure an individual’s blood mercury levels. A fingerstick with a deep puncture blade can draw up to 1 mL of blood, sufficient for analysis via this method. Fin-gersticks are faster and less invasive than venous blood draws. Collection of fingerstick samples makes meas-urement of blood mercury more accessible and practical for situations outside of the clinical setting. The ability to utilize small sample volumes combined with a rapid turn-around time makes measuring blood levels just as viable as hair concentrations for efficient assessment of mercury exposure.