the insulin syringe thing finally clicked for me and I want to write it down
the insulin syringe thing finally clicked for me and I want to write it down, which sounds obvious until you try to state the evidence for it. Research-use-only material is not approved for human use, so treat everything in this thread as arithmetic about solutions rather than instructions for a person. I keep a…
if the maths gives you a fraction of a unit, change the concentration
That is sterile water, not bacteriostatic. Same appearance, different product, and it matters for a multi-draw vial.
bacteriostatic water has the preservative, sterile water does not
Reconstituted at 2mL when I meant to use a different volume. Caught it because the units looked wrong on the barrel. Now I write 5mg/mL on the glass before I put the cap back.
Reconstituted at 2mL when I meant to use a different volume.
Right, and the arithmetic behind it: 20mg in 2mL is 10mg/mL, so 2mg is 20 units.
That is sterile water, not bacteriostatic.
dilara_szabo has the units point exactly right. They are a volume on the barrel and nothing else.
if the maths gives you a fraction of a unit, change the concentration
This is the sentence that makes the rest unnecessary. Write it on the vial and the problem is gone.