Sharps containers are a legal requirement for disposal in several jurisdictions and a sensible precaution everywhere. A rigid sealed container is the minimum. Noting that I have skin in this question and have tried to discount for it.
Gauge and length selection for subcutaneous injection Writing it up because I had to work it out twice and would rather nobody else did.
A follow-up question about gauge and length selection that I did not know to ask the first time.
The earlier thread answered what I asked. What I should have asked is below, and I think it is the one that matters.
Adding the measurement that the opening post says would settle it.
Aspirating before injection: for subcutaneous injection, aspirating (pulling back on the plunger to check for blood) is not necessary and is sometimes discouraged because it is associated with more discomfort. Subcutaneous injection without aspiration is standard practice.
This is the version I would want a new member to read first.
Gauge and length selection: I have looked for the primary source twice and failed twice. Either it does not exist or it is somewhere I do not know to look, and I would like to know which.
This is the answer, and the reason it is the answer is the more useful part.
Sharps containers are a legal requirement for disposal in several jurisdictions and a sensible precaution everywhere. A rigid sealed container is the minimum.
Noting that I have skin in this question and have tried to discount for it.
Confirming post #6 from a second method, which matters more than confirming it from a second person.
Adding a small correction to the gauge and length selection summary above rather than a disagreement with it. The substance holds; one of the figures is out by a factor that matters.
U-100 means the barrel is graduated for a solution containing one hundred units of insulin per millilitre. For anything that is not insulin, the units are simply hundredths of a millilitre.
The variance between people here is larger than the effect being discussed.
On gauge and length selection, I would rather understate and be corrected upward than overstate and be quoted. That is a house style here and it is a good one.
Confirming post #10 from a second method, which matters more than confirming it from a second person.
Gauge is the outside diameter and higher numbers are thinner. Thinner needles hurt less and draw more slowly, which is the entire trade.
It cost nothing to check and would have cost something not to.
Gauge and length selection is a good example of a question where the honest answer is boring and the interesting answers are unsupported. I would go with boring.
Post #12 describes the usual case. This is about the unusual one.
U-100 means the barrel is graduated for a solution containing one hundred units of insulin per millilitre. For anything that is not insulin, the units are simply hundredths of a millilitre.
Post #14 is the version of this I will quote in future. One addition.
Whatever the answer on gauge and length selection turns out to be, the method for getting there is the same: state the assumption, do the arithmetic in public, invite the correction.
Where I part company with post #12, and it is a narrow parting.
Silicone coating on the barrel affects how smoothly the plunger moves and how a very slow injection feels. It is one reason two syringes at the same specification are not identical to use.
A partial answer, offered because a partial answer beats none.
Fine by me. I had wanted a stronger conclusion and there is not one available.
One caution on gauge and length selection: everything above assumes the underlying documentation is what it claims to be. That assumption is doing real work and is rarely stated.
Two questions I would want answered before drawing anything from the gauge and length selection data above: how were the cases selected, and what happened to the ones that dropped out.
Sharps containers are a legal requirement for disposal in several jurisdictions and a sensible precaution everywhere. A rigid sealed container is the minimum.
Answering the question post #19 raises rather than the one it answers.
Needle length for subcutaneous delivery is a question about tissue depth and injection angle together. Short needles at ninety degrees and longer ones at an angle reach comparable depths.
Sharps containers are a legal requirement for disposal in several jurisdictions and a sensible precaution everywhere. A rigid sealed container is the minimum.
Adding a null result on gauge and length selection. I looked, carefully, and found nothing, and null results deserve posting precisely because they never are.
Gauge and length selection would be much easier to settle if anyone reported the denominator. Almost nobody reports the denominator.
U-100 means the barrel is graduated for a solution containing one hundred units of insulin per millilitre. For anything that is not insulin, the units are simply hundredths of a millilitre.
The short answer was in the first line; everything after is the working.
Same experience here, different supplier, so it is at least not unique to one of them.
Post #25 is the version of this I will quote in future. One addition.
An update on my earlier gauge and length selection post: the pattern held for another six weeks and then stopped, which I did not predict and cannot explain.
Having read the whole gauge and length selection thread before replying: the question in the first post has not actually been answered yet, and three of us have answered a nearby one instead.