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c/reconstitution·submitted 13 days ago by u/aleksi_lehtinen

[Explainer] units are volume, mg are mass, this is the #1 error on this site

Explainerbranch of 7 comments

units are volume, mg are mass, this is the #1 error on this site. It comes up every few weeks and the answer has not changed. Aim the stream down the wall of the vial rather than into the cake. Reconstitution is a solubility problem, not a mixing problem, and mechanical shear does nothing helpful. Reconstituted at…

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7 comments, started 12 days ago
u/saskia_mwangi23 points·12 days ago

Did the maths give you a whole number of units, or a fraction?

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u/bac_water_banditMOD15 points·12 days ago

Working has to be shown on arithmetic posts. Added a note asking for it rather than removing this one.

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u/alcohol_aversion6 points·12 days ago

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

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u/ruben_cabrera12 points·11 days ago

the number you write down is the number you will trust at 6am

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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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