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c/reconstitution·submitted 2 years ago by u/viktor_erdogan

the units question that gets asked weekly, answered properly

PSAbranch of 9 comments

Trying to settle this properly because the thread from last year went in circles. The claim: mg/mL matters. The counter-claim: it is measurement error. Both sides have been asserting it confidently for about 10 months without either producing anything. What would actually settle it is 33 people measuring the same…

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9 comments, started 2 years ago
u/quarter_dose_queenlow and slow0 points·2 years ago

What was the vial size and how much bac water?

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u/units_not_mgMOD1 point·2 years ago

Removed a chain here. The rule is one line long and it is not negotiable.

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u/viktor_erdoganOP1 point·2 years ago

swirl, do not shake, or you are courting oxidation

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u/signe_grimaldi1 point·2 years ago·edited

Small correction: the trial was 19 weeks, not 3. Does not change your point but people will quote it.

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u/anya_antonsen1 point·2 years ago

Yeah, showing the arithmetic is the fastest way for someone to spot the error.

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u/ruben_cabrera1 point·2 years ago

never post a calculation as advice without stating the concentration

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[deleted]1 point·2 years ago

[deleted]

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u/arto_falk1 point·2 years ago

Cosigning. The concentration on the vial in marker is load-bearing.

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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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