[Discussion] can we stop arguing about dead space until somebody posts a number
insulin syringe. That is the whole post, but I will justify it.
Everything else people worry about in c/intlshipping is downstream of it. Titration speed, reflux, the endless dose arguments — most of it resolves if you sort insulin syringe out first, and almost nobody does.
I say this having got it wrong for 12 months. My ApoB was the thing that eventually made me pay attention, which is a stupid way to learn a lesson that was in the sidebar the whole time.
best — the order this archive was captured in
the concentration on the vial in marker is the most important step
the concentration on the vial in marker is the most important step
Disagree on that part. 97.4% and 97.4% on the same vial is normal.
10mg vial, 2mL water, concentration is 10/2 — write it on the vial afterwards
the concentration on the vial in marker is the most important step
dosing errors come from people reconstituting two vials differently and forgetting which is which
Not convinced. The evidence does not support that reading.
Disagree but this is the good kind of wrong — it is specific enough to be checked.
5mg vial, 2mL water, concentration is 5/2 — write it on the vial afterwards
Not convinced. The evidence does not support that reading.
Dead space ate 12 units on a low-volume draw. Tiny impact at 1.0mg, massive impact at 1.7mg.
u-100 syringe, not u-40, or your math is off by factor of 10
u-100 syringe, not u-40, or your math is off by factor of 10
Yes, exactly this, and it is the bit that took me 90 weeks to accept.
dead space is real and the syringe matters
Yeah, showing the arithmetic is the fastest way for someone to spot the error.
Dead space ate 15 units on a low-volume draw. Tiny impact at 0.5mg, massive impact at 12.5mg.
the concentration on the vial in marker is the most important step
dosing errors come from people reconstituting two vials differently and forgetting which is which
Dead space in the needle hub holds a small but non-trivial volume. On low-volume draws that can be several units.
Spent 19 weeks confused about concentration math until someone showed me the table. 5mg, 2mL, concentration is 5/2.
Disagree. What you are describing is consistent with bacteriostatic water, not with what you concluded.
Retitled to remove editorialising. Put the evidence in the body.
Retitled to remove editorialising.
Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.
dosing errors come from people reconstituting two vials differently and forgetting which is which
Crossposting this to c/sideeffects because the people who need it are not reading this community.
What was the vial size and how much bac water?
u-100 syringe, not u-40, or your math is off by factor of 4
- 1Disagree but this is the good kind of wrong — it is specific enough to be…10 comments in this branch · started by u/vito_beaulieu
- 210mg vial, 2mL water, concentration is 10/2 — write it on the vial afterwards4 comments in this branch · started by u/escrow_evangelist