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Medical professionals are often taught these days that aspiration is not necessary for IM injections, particularly in commonly used sites such as the delts. Fr

Medical professionals are often taught these days that aspiration is not necessary for IM injections, particularly in commonly used sites such as the delts. From the CDC [1]: Aspiration before injection of vaccines or toxoids (i.e., pulling back on the syringe plunger after needle insertion but before injection) is not necessary because no large blood vessels are present at the recommended injection sites [1] https://www.cdc.gov/vaccines/hcp/acip-recs/general-recs/administration.html https://www.cdc.gov/vaccines/hcp/acip-recs/general-recs/admi...

birken 5y ago
This lines up exactly with what Dr. Daniel Griffin talked about in the most recent clinical update podcast for TWIV [1]. Apparently aspirating makes the shot more painful, because the needle is in the body longer, and serves no benefit as long as the vaccinator is putting it in the right location. 1: https://www.microbe.tv/twiv/twiv-741/ https://www.microbe.tv/twiv/twiv-741/ (towards the end)
jerf 5y ago
"no large blood vessels are present at the recommended injection sites" That's a bold statement. Sure, no large blood vessels may be present at the recommended injection site on an average human, but it's well known there is more divergence in anatomy than they necessarily teach about in primary school, and vaccines are supposed to go in basically everyone.
- mirthflat83 5y ago
  Lol.. please comment after taking an actual human anatomy class
  - jerf 5y ago
    As a set of examples, not the whole gamut of such possibilities: https://health.howstuffworks.com/human-body/parts/reversal-of-organ.htm https://health.howstuffworks.com/human-body/parts/reversal-o... Your first class may not teach this, but you'd get to it eventually if you kept taking classes. (Then again, your first class may at least mention this sort of thing at some point.) What the "average human" is is not what all humans are. There's all sorts of things like, the stuff in that link, major nerve clusters having additional or missing separations, extra separated or fused bones, major veins and arteries not being quite in the usual location... look close enough and you'll find something on everybody that doesn't match the "standard human anatomy".
raverbashing 5y ago
Still, even if it gets close to a small vessel it might be problematic Maybe we'll need to do it for AZ. Or maybe subcutaneous?

birken 5y ago

This lines up exactly with what Dr. Daniel Griffin talked about in the most recent clinical update podcast for TWIV [1]. Apparently aspirating makes the shot more painful, because the needle is in the body longer, and serves no benefit as long as the vaccinator is putting it in the right location. 1: https://www.microbe.tv/twiv/twiv-741/ https://www.microbe.tv/twiv/twiv-741/ (towards the end)

jerf 5y ago

"no large blood vessels are present at the recommended injection sites" That's a bold statement. Sure, no large blood vessels may be present at the recommended injection site on an average human, but it's well known there is more divergence in anatomy than they necessarily teach about in primary school, and vaccines are supposed to go in basically everyone.

mirthflat83 5y ago
Lol.. please comment after taking an actual human anatomy class
- jerf 5y ago
  As a set of examples, not the whole gamut of such possibilities: https://health.howstuffworks.com/human-body/parts/reversal-of-organ.htm https://health.howstuffworks.com/human-body/parts/reversal-o... Your first class may not teach this, but you'd get to it eventually if you kept taking classes. (Then again, your first class may at least mention this sort of thing at some point.) What the "average human" is is not what all humans are. There's all sorts of things like, the stuff in that link, major nerve clusters having additional or missing separations, extra separated or fused bones, major veins and arteries not being quite in the usual location... look close enough and you'll find something on everybody that doesn't match the "standard human anatomy".

raverbashing 5y ago

Still, even if it gets close to a small vessel it might be problematic Maybe we'll need to do it for AZ. Or maybe subcutaneous?