This is a continuation of a long topic, addressed by post number rather than by page. Start at post 1.
Needle gauge: smaller numbers (30G) are finer and less painful. Larger numbers (25G) are courser. For subcutaneous injection, 27-30G is typical. Finer needles take longer to draw up but hurt less.
Not disagreeing with anyone above, just adding the bit I keep having to look up.
I read post #29 twice before replying, because I had assumed the opposite.
If you are new and reading this thread for the answer to Filter needles: the answer is conditional, the conditions are in the third reply, and the rest of the thread is worth skipping.
Offering a way to settle Filter needles rather than another opinion about it. Two measurements, taken the same way, a fortnight apart. If the difference is within the noise, the question was not answerable at this precision.
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.
That is a cleaner way of putting what I was circling around.
Coming back to post #32, because the follow-up matters more than the original answer.
I have three months of notes on Filter needles and the honest summary is that the trend is real and the week-to-week numbers are noise. I nearly drew the opposite conclusion from the first fortnight.
Something worth flagging about Filter needles: the strongest-sounding claims in this thread are the ones with no source attached, which is the usual pattern and not a coincidence.
Safety-engineered needles are worth using if you have children or anyone else in the house, and the retraction mechanism occupies dead volume that ordinary syringes do not.
I have kept the units in throughout, for the obvious reason.
Sharps containers are a legal requirement for disposal in several jurisdictions and a sensible precaution everywhere. A rigid sealed container is the minimum.
Post #37 describes the usual case. This is about the unusual one.
Filter needles looks different depending on whether you are reading the primary literature or the summaries of it, and the difference is not in our favour.
Where I would push back on the Filter needles consensus is the confidence, not the direction. The direction looks right. The confidence is borrowed.
I will take the caveat as seriously as the claim, which is the point of putting it there.
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.
Careful with the language on Filter needles. "Not detected" and "not present" are different findings and the first is a statement about the method.
Filter needles are for drawing from glass ampoules where particulate is a real risk. For a stoppered vial they add dead volume in exchange for very little.
Two sources, same conclusion, and I could not rule out that one copied the other.
Building on post #45 rather than restating it.
On Filter needles the community has more anecdote than the confidence in this thread implies, and I include my own contribution in that.
The strongest argument against my own position on Filter needles, stated as well as I can state it, since nobody else has yet.
This follows post #49 rather than contradicting it.
Sharps containers are a legal requirement for disposal in several jurisdictions and a sensible precaution everywhere. A rigid sealed container is the minimum.
Adding this to the thread rather than to the wiki, because I am not confident enough for the wiki.
Needle length: typical lengths for subcutaneous injection are 4-6 mm (short), 8 mm (standard), or 10-12 mm (longer). Longer needles are needed for deeper tissue or if you have abdominal adiposity.
No notes. Posting so the count is not one.
Building on post #51 rather than restating it.
Reframing Filter needles slightly, because I think the disagreement is about the question rather than the answer. If the question is "does it happen", yes. If it is "how often", nobody here knows.
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