Why is a blood test for alcohol taken shortly after drinking more advantageous for the suspect than one taken 30 minutes or more after drinking?
What will be an ideal response?
The administration of a blood test for alcohol requires drawing blood from a vein, but alcohol in the veins diffuses very rapidly into body tissues during the early phases of absorption compared to blood in the arteries. Thus, blood from a vein can show a misleadingly low alcohol concentration
immediately after drinking. Once absorption is complete, however, the alcohol becomes equally distributed throughout the blood system, so blood taken from a vein a short time after drinking shows a more accurate blood-alcohol concentration.
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