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c/reconstitution·submitted 10 months ago by u/aurel_boateng

why does nobody talk about dead space

Correctionbranch of 16 comments

dead space. That is the whole post, but I will justify it. Everything else people worry about in c/intlshipping is downstream of it. Titration speed, reflux, the endless dose arguments — most of it resolves if you sort dead space out first, and almost nobody does. I say this having got it wrong for 2 months. My ApoB…

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16 comments, started 10 months ago
u/emil_okwuosa306 points·10 months ago

I love that this community will spend 40 comments on a detail. That pedantry is why the numbers here matter.

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[removed]227 points·10 months ago

[removed by moderator]

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u/quarter_dose_queenlow and slow75 points·10 months ago

i am begging people to write down the concentration

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u/aurel_boatengOP100 points·10 months ago

What was the vial size and how much bac water?

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u/hedda_adeyemi176 points·10 months ago

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

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u/ledger_modmod · vetting134 points·10 months ago

Is that 30mg vial or 17mg?

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u/aurel_boatengOP139 points·10 months ago

Two vials, two different concentrations, forgot which was which, almost made a 7 times error. Now I label everything.

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u/oskar_kaufmann245 points·10 months ago

30mg vial, 2mL water, concentration is 30/2 — write it on the vial afterwards

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u/signe_grimaldi169 points·10 months ago

What was the vial size and how much bac water?

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u/bac_water_banditreconstitution-38 points·10 months ago

show your working or it is unhelpful

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u/cesar_ivaturi80 points·10 months ago

Edit to your parent would help — the concentration you quoted assumes one scenario and you have written another above it.

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u/anya_antonsen303 points·10 months ago

more water means more units for the same dose, which means finer resolution

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u/julia_erdogan161 points·10 months ago

That is net peptide content, not purity. Different number, different meaning.

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u/hedda_ekstrom126 points·10 months ago

u-100 syringe, not u-40, or your math is off by factor of 15

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u/ismael_nwosu131 points·10 months ago

Show the arithmetic. Where did the units come from?

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u/dexa_twice_yearlybody comp41 points·10 months 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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