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c/reconstitution·submitted 19 days ago by u/signe_grimaldi

reconstituted at 1mL instead of 2mL and caught it before injecting. lucky.

Mathbranch of 6 comments

reconstituted at 1mL instead of 2mL and caught it before injecting. lucky. It is the sort of thing everyone half-believes and nobody writes down. The relevant figures are 1mL and 2mL, and they come from the same log I have kept the whole time. Asked SSA what volume they reconstitute to for their own stability testing…

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6 comments, started 17 days ago
u/georgi_adebayo154 points·17 days ago

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.

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u/ledger_modmod · vetting72 points·17 days ago

What is written on the vial right now?

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u/piotr_bruun30 points·17 days ago

Small fix — a U-100 syringe is 100 units per mL. If yours is marked differently it is not U-100 and the whole calculation changes.

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u/rasmus_kuipers30 points·17 days ago

units are a volume on a U-100 syringe, not a dose

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u/quarter_dose_queenlow and slow7 points·17 days ago

Spent 20 weeks confused about this until somebody drew the table for me. 5mg, 3mL, 1.67mg/mL, 1.5mg is 90 units. That is the whole thing.

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u/tomas_kimani2 points·16 days ago·edited

Started reconstituting everything to a round concentration and the six-in-the-morning error rate went to zero.

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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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