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c/reconstitution·submitted 9 months ago by u/units_not_mg

mg/mL — 18 things I got wrong before I got it right

Correctionbranch of 6 comments

I have had 8 orders now and I keep a table, so here is the honest summary rather than a vibe. Material has been consistent. Communication has not. Shipping has varied by about 34 days on nominally the same lane, which matters more in summer than in February. The independent number came back 96.8% against a claimed…

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6 comments, started 9 months ago
u/sock_puppet_spotter132 points·9 months ago

Disagree. What you are describing is consistent with concentration, not with what you concluded.

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u/units_not_mgOPsyringe math57 points·9 months ago

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

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u/units_not_mgOPsyringe math36 points·9 months ago

Dead space ate 20 units on a low-volume draw. Tiny impact at 1.0mg, massive impact at 15mg.

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u/ruben_cabrera38 points·9 months ago

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

Yes, exactly this, and it is the bit that took me 16 weeks to accept.

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u/quiet_reader_9926 points·9 months ago

show your working or it is unhelpful

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u/escrow_evangelist62 points·9 months ago

The confident tone is doing a lot of work that the evidence is not.

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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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