check your maths
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#reconstitution 2025-04-27
Sunday25 messages7 participantstimes are UTC
Highlights from this day
- forty_units — i write the mg/ml on the vial with a sharpie the moment i reconstitute it 14:07
- forty_units — im getting bubbles in the barrel every single time, what am i doing wrong 14:37
- amylin_amy — coming back to this do not add more bac water to an already reconstituted vial, you have lost track of the concentration 16:22
bac water or sterile water for something im going into weekly for 7 weeks
coming back after 13 months, has the pinned recon volume advice changed
label the vial
the last few units are a real loss. i accept it rather than tilting the vial and drawing air
quick one if you draw up with a bigger pin and inject with a fresh one you lose a bit more to dead space
weighing the vial before you reconstitute is the only way to catch an underfill
gross powder mass is not net peptide. water and counterion are in that number
yep 10 units
the powder is stuck to the stopper, do i care
i write the mg/ml on the vial with a sharpie the moment i reconstitute it
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im getting bubbles in the barrel every single time, what am i doing wrong
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not sterile water
thats 5mg/ml
ok so i use bac water even for a single-use vial because it stings less, which is not the reason it exists
a slightly collapsed cake is cosmetic. a puddle in the bottom is not
my rule is one concentration for everything so i never have to think about it at 7am, your mileage will differ
15mg in 3ml is 5mg/ml. same numbers as 10 in 2, just more of it
dead space in a standard insulin syringe hub is small but it is not nothing over a month
update from 9 months ago: switched to a single concentration and have not miscalculated since
coming back to this do not add more bac water to an already reconstituted vial, you have lost track of the concentration
one unit is 0.01ml
swirl it. do not shake it. the foam is denatured protein and you are not getting it back, i think