dead space
#reconstitution 2026-02-14
Saturday21 messages6 participantstimes are UTC
Highlights from this day
- van_isle_vial — if you draw up with a bigger pin and inject with a fresh one you lose a bit more to dead space 18:48
- lead_time_lars — dead space in a standard insulin syringe hub is small but it is not nothing over a month, someone check my working 19:07
- pharmac_pen — my vial pulled the water in on its own, is that the vacuum or did i do something 19:42
- lead_time_lars — a slightly collapsed cake is cosmetic. a puddle in the bottom is not 20:10
too dilute imo
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if you draw up with a bigger pin and inject with a fresh one you lose a bit more to dead space
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swirl it. do not shake it. the foam is denatured protein and you are not getting it back
dead space in a standard insulin syringe hub is small but it is not nothing over a month, someone check my working
sorry to jump in the last few units are a real loss. i accept it rather than tilting the vial and drawing air
van_isle_vialswirl it. do not shake it. the foam is denatured protein and you are not getting it back
you can absolutely just always use 2ml, and honestly most of us should
aim the diluent at the glass wall, not at the powder. it goes in gentler
temperature of the diluent does not matter. how fast you push it in does
does it matter if i inject the bac water straight at the powder
check your maths
my vial pulled the water in on its own, is that the vacuum or did i do something
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bac water
5mg in 2ml gives 2.5mg/ml, 0.25mg is 10 units. good for a starting dose
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nope, redo it
anyone worked out a recon volume that puts 1mg on a round unit mark
the meniscus thing is real. read it at eye level or you are guessing by a unit either way
gross powder mass is not net peptide. water and counterion are in that number
a slightly collapsed cake is cosmetic. a puddle in the bottom is not
weighing the vial before you reconstitute is the only way to catch an underfill, anyway
*Medutest not the other one