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c/reconstitution·submitted 20 days ago by u/freya_onwuka

help me understand insulin syringe, I have read the wiki twice

Discussionbranch of 6 comments

Asking properly rather than in a comment on somebody else’s thread: help me understand insulin syringe, I have read the wiki twice. Shook the first vial because nobody told me not to. It was fine, but I have swirled every one since. Wrote the date on the vial as well as the concentration after losing track of which…

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6 comments, started 20 days ago
u/RetaAndRegret28 points·20 days ago

Right — the volume you add is the only variable you control here, and the cake does not change it meaningfully.

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u/ahmed_rasmussen0 points·20 days ago

I keep a laminated card in the drawer with the arithmetic on it. Looks ridiculous. Has never once let me draw the wrong volume.

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u/ilias_steiner3 points·20 days ago

This. Showing the working is the fastest way for somebody else to spot the mistake.

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u/swirl_dont_shakereconstitution2 points·20 days ago

Same. I got this wrong once, caught it because the units looked absurd, and have written on every vial since.

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u/sofia_danquah2 points·19 days ago

dead space in the needle hub is real and it is small

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u/saskia_mwangi0 points·20 days ago

I would not round that figure. At 10mg/mL a rounding error of two units is a real fraction of the intended amount.

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About c/reconstitution

The arithmetic and the technique. Bacteriostatic versus sterile water, reconstitution volume as a concentration choice, converting mg/mL into insulin-syringe units, dead space, swirl-not-shake, stopper coring, and how long a reconstituted vial is actually good for. Math errors get corrected fast and politely.

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