Blood
Drug-testing a blood sample measures whether or not a drug or a metabolite is in the body at a particular time. These types of tests are considered to be the most accurate way of telling if a person is intoxicated. Blood drug tests are not used very often because they need specialized equipment and medically trained administrators.
Depending on how much marijuana was consumed, it can usually be detected in blood tests within six hours of consumption. After six hours has passed, the concentration of marijuana in the blood decreases significantly. It generally disappears completely within 30 days.
Famous quotes containing the word blood:
“The blood congealing
black
between the pleased fingers.”
—Denise Levertov (b. 1923)
“What is this flesh I purchased with my pains,
This fallen star my milk sustains,
This love that makes my heart’s blood stop
Or strikes a sudden chill into my bones
And bids my hair stand up?”
—William Butler Yeats (1865–1939)
“They shall take some of the blood and put it on the two doorposts and the lintel of the houses in which they eat it.”
—Bible: Hebrew, Exodus 12:7.