Quote:
Originally Posted by wazu
Don't all shots hit blood vessels?
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While all shots will pierce some capillaries, the thought is that the shot hitting a vein in the shoulder leads for a more direct path for the drug to reach the heart. If you are injecting it into the muscle itself, you form a quasi depot, which is slowly absorbed by the surrounding vasculature. If you were to accidentally inject into a vein, that will reach the cardiac tissue much faster.
This is why practitioners were taught in the past to aspirate the needle before injecting--to check and make sure that they weren't in a blood vessel. With most IM shots now it isn't considered an issue, but the thought has arisen with these rare cases of myocarditis that aspirating before injecting the needle would avoid injecting the vaccine directly into the bloodstream.
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"When the Know-Nothings get control, it will read 'all men are created equal, except negroes, and foreigners, and Catholics.' When it comes to this I should prefer emigrating to some country where they make no pretense of loving liberty – to Russia, for instance, where despotism can be taken pure, and without the base alloy of hypocrisy.”--Abraham Lincoln
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