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The needle breaks the skin and moves through any contaminants that were on the skin's surface--potentially mixing the contaminants with the sample regardless of
by learc83 11y ago
The needle breaks the skin and moves through any contaminants that were on the skin's surface--potentially mixing the contaminants with the sample regardless of whether the blood sits on the surface of the skin or not.
- enraged_camel 11y agoIsn't it common practice to wipe the skin with a disenfectant to prevent this very thing? A 60-70% alcohol-based solution will kill the vast majority of germs on the skin.
- learc83 11y agoContaminants don't have to be alive to confuse results. Also many contaminants we're talking about were never alive in the first place.