[Discussion] can we stop arguing about units until somebody posts a number
Trying to settle this properly because the thread from last year went in circles.
The claim: mg/mL matters. The counter-claim: it is measurement error. Both sides have been asserting it confidently for about 7 months without either producing anything.
What would actually settle it is 7 people measuring the same thing the same way. I have started; my numbers are below. They lean one way but not strongly enough for me to declare victory.
If you have data, post the data. If you have an opinion, flair it as an opinion.
best — the order this archive was captured in
Flair changed to match the content. Read the sidebar before posting next time and we are square.
never post a calculation as advice without stating the concentration
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more water means more units for the same dose, which means finer resolution
Show the arithmetic. Where did the units come from?
more water means more units for the same dose, which means finer resolution
Cosigning. The concentration on the vial in marker is load-bearing.
Cosigning.
Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.
Cosigning. The concentration on the vial in marker is load-bearing.
stopper coring on the 14th draw because you keep using the same entry point. rotate.
30mg vial, 2mL water, concentration is 30/2 — write it on the vial afterwards
the concentration on the vial in marker is the most important step
Cored the stopper on my 2th draw because I kept using the same entry point. Rotate the puncture site.
Cored the stopper on my 2th draw because I kept using the same entry point.
Yes, exactly this, and it is the bit that took me 47 weeks to accept.
u-100 syringe, not u-40, or your math is off by factor of 15
Edit to your parent would help — the concentration you quoted assumes one scenario and you have written another above it.
This is correct. 2mL versus 17mL is the common mistake.
Yeah, showing the arithmetic is the fastest way for someone to spot the error.
Cored the stopper on my 7th draw because I kept using the same entry point. Rotate the puncture site.
Reconstituted at 3mL when I meant 9mL. Caught it because the units looked wrong. Write the concentration.
never post a calculation as advice without stating the concentration
The confident tone is doing a lot of work that the evidence is not.
Cosigning. The concentration on the vial in marker is load-bearing.
dead space is real and the syringe matters
This is correct. 1mL versus 5mL is the common mistake.
Disagree. What you are describing is consistent with concentration, not with what you concluded.
Cosigning. The concentration on the vial in marker is load-bearing.
Dead space ate 14 units on a low-volume draw. Tiny impact at 5mg, massive impact at 2.5mg.
- 1Yeah, showing the arithmetic is the fastest way for someone to spot the error.8 comments in this branch · started by u/sock_puppet_spotter
- 2it is in the wiki actually7 comments in this branch · started by u/sleep_apnea_sam