On the subject in the title: A site rotation scheme that is easy enough to actually follow Working notes rather than a conclusion.
Two things I would like separated before anyone answers on site rotation scheme, because they get bundled and then argued about as one thing.
The first is descriptive: what has actually been observed, by whom, and how. The second is causal: why. I am asking about the first only.
I keep a log for site rotation scheme specifically because my memory of it turned out to be systematically wrong in one direction. Six weeks of notes cost nothing and settled it.
Worth separating two things that the opening post runs together.
Alcohol swabbing and letting the site dry is the whole of the preparation for a subcutaneous injection into intact skin. Injecting before it dries is what stings.
A weak preference rather than a position.
Confirming post #2 from a second method, which matters more than confirming it from a second person.
Source for the site rotation scheme figure, since it was asked for. It is in the discussion rather than the abstract, which is why the version circulating is stronger than the paper is.
Reading the surrounding paragraph is worth the two minutes. The authors are more careful than their summarisers.
I had written a reply contradicting post #4 and deleted it. Here is what survived.
I disagree with the framing of site rotation scheme above, and I think it is a substantive disagreement rather than a terminological one. Setting out why, so it can be checked.
The reasoning depends on an assumption that is doing a lot of work and is never stated. If the assumption holds, the conclusion follows. I do not think it holds generally.
Bleeding at the injection site: normal and usually minimal. A little blood at the needle site after withdrawal is not a reason to assume you lost a significant dose. The needle passed through tissue and there is a small amount of bleeding in the tract.
That is where I would start, not where I would stop.
Where I part company with post #8, and it is a narrow parting.
Note the site alongside the dose. If a local reaction appears three weeks later you will want to know where the previous four injections went.
I would treat the number as indicative rather than as a measurement.
Genuine question rather than a rhetorical one: has anyone here actually observed site rotation scheme, as opposed to read about it? The thread is long and I cannot tell.
Building on post #11 rather than restating it.
Pinching a fold is useful for lean tissue and unnecessary elsewhere. The point is to keep the needle out of muscle, and whether you need to depends on the site and on you.
The version of site rotation scheme that circulates here is a simplification of a simplification. It is not wrong, but it has lost the conditions under which it holds, and those conditions are where the interesting cases live.
Reading back through, this was answered upthread and I missed it. My fault.
Taking post #14 at face value and following it one step further.
If you have to inject at a different time of day than usual, that is a much smaller perturbation than it feels for a weekly compound with a week-long half-life.
Same conclusion as the reply above, reached differently, which is mildly reassuring.
Agreed on site rotation scheme, with one qualification that I think matters. The reasoning holds for the case as described. Change the starting assumption and it does not, and the starting assumption is the part nobody states.
If someone has run site rotation scheme properly I would rather read that than my own reconstruction of it. Posting mine only because the thread has gone quiet.
Picking up post #20: that is the part I would want checked first.
An observation about site rotation scheme that I cannot explain and am posting anyway, on the principle that unexplained observations are more useful public than private.
On post #18 — agreed on the reasoning, with one qualification.
If you have to inject at a different time of day than usual, that is a much smaller perturbation than it feels for a weekly compound with a week-long half-life.
The claim is narrower than it sounds, and deliberately so.
Worth separating two things that post #22 runs together.
I would be cautious about generalising from the site rotation scheme example above. It is a good example. It is one example.
Site reactions that appear immediately and settle within a day are described commonly here. Ones that appear a day later and spread are a different observation and worth describing to a clinician rather than a forum.
What would change my mind on site rotation scheme is a second dataset collected by someone with no stake in the first. Until then I hold it loosely and I would rather say so than pretend to more.