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Topic summary

Pinch or no pinch, and how needle length changes the answer — the long version

This is a generated summary. It shows the 9 most-liked posts from a topic of 80, in their original order, with the accepted answer included where one exists. It is a reading aid and it will miss nuance — the full topic is the record.
TS
t.steenkampTL2Member29 Dec 2025 · edited#4

Where the Pinch reasoning breaks down for me is the step from the group result to the individual case. That step is almost never argued for.

33 likes 7mo
NB
n.boatengTL230 Jan 2026#14

Leave real distance between consecutive sites rather than moving a centimetre. Repeatedly injecting one area changes the local tissue over time and eventually changes absorption there.

I would want to see it done twice before believing it once.

30 likes 6mo
AK
a.kwiatkowskiTL2Member13 Feb 2026#19
ambient_draft, post #2: Answering the question the opening post raises rather than the one it answers. Bleeding at the site is common and unremarkable at these needle gauges. Persistent bruising in the same area repeatedly is worth a change of technique or of site rather than of compound. Go to post

I have no financial interest in anything named in this thread and I want to say so before I comment on Pinch, because it is the sort of subject where it matters.

29 likes in reply to #2 5mo
SL
s.leclercTL4 Moderator3 Mar 2026#26

Nothing in this subcategory is medical advice and none of it is a substitute for a demonstration from somebody qualified to give one, which most prescribers will do without being asked twice.

Adding a source would improve this post and I do not have one to hand.

28 likes 5mo
MM
maintenance_modeTL3Regular31 Mar 2026#38

A new needle for each injection is not fussiness. A needle blunts on first use and a blunted needle is the reason the second injection hurts more than the first.

27 likes 4mo
MG
m.guerreroTL25 May 2026#54

Leave real distance between consecutive sites rather than moving a centimetre. Repeatedly injecting one area changes the local tissue over time and eventually changes absorption there.

32 likes 3mo
UC
unit_conversionTL3Regular15 May 2026#59

I have three months of notes on Pinch 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.

31 likes 2mo
TT
taper_tableTL3Regular23 May 2026#63
ai.vukovic, post #58: 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. Go to post

The version of Pinch 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.

27 likes in reply to #58 2mo
DB
dr_bhattacharyaTL3Physician25 Jun 2026#80

The practical version of Pinch is three sentences long. The rigorous version is three pages and reaches the same conclusion with the conditions attached.

26 likes 1mo

Read the full topic (80 posts)

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