I see their has been some discussion regarding vaccination technique. This is my ramblings on it.
Their is biologic plausibility and some animal data (on adeno vector vaccines) that direct intravenous administration will cause undesired effects.
The deltoid is a relatively avascular structure, but it is a muscle so to say their are no blood vessels is
wrong. Also in general we know that vascular anatomy is highly variable between individuals.
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When
VITT was noted, I think it was via
Dr John Campbell (nurse) videos that I became aware of this possibility, and did some superficial reading of the mouse studies.
About this time our nurses were receiving training on the vaccine administration process. I asked them about aspiration. They all confirmed that part of the training was that aspiration was NOT required for these vaccines. ( But they all said they would aspirate anyway as it has become an ingrained unconscious part of giving an IMI injection). I suggested that despite what they had been told, to use their usual technique of a quick aspiration.
I have pondered why no aspiration would be specifically included in training. My only conclusion is that perhaps in anticipation of mass vaccination needing a "less skilled" vaccinators workforce and the conclusion was that including aspiration as part of the vaccination process could cause confusion?
Having had the original and booster, and closely watching I can confirm a quick "tug back" on the needle for both of my vaccinations.
As an aside, lets tone down the antagonism. Geoff and myself certainly don't agree on everything, but their are few people in the real world that agree with everything I believe and vice versa, yet we can remain friends. I am sure over a beer and a braai most of us would get along just fine. I think we are going to have a rough few weeks coming up, lets try keep sight of the goal that most of us here have in common - getting back to normal.