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c/reconstitution·submitted 28 days ago by u/emil_zamora

bacteriostatic water — my 8-week log, condensed into one table

Mathbranch of 10 comments

I have had 5 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 24 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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10 comments, started 27 days ago
u/saskia_rahimi46 points·27 days ago

Dead space in the needle hub holds a small but non-trivial volume. On low-volume draws that can be several units.

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u/vial_math_veraMOD17 points·27 days ago

Flair changed to match the content. Read the sidebar before posting next time and we are square.

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u/arto_falk5 points·26 days ago

Slight fix: the number was 97.6, not 97.4. Decimal point, but a fairly consequential one.

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u/julia_erdogan22 points·27 days ago

Dead space in the needle hub holds a small but non-trivial volume.

Disagree on that part. 99.2% and 98.9% on the same vial is normal.

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u/yusuf_achebe10 points·26 days ago

Small correction: the trial was 3 weeks, not 33. Does not change your point but people will quote it.

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u/emil_zamoraOP8 points·26 days ago·edited

Respectfully this is a sample of one presented as a finding.

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u/rina_bergstrom8 points·26 days ago·edited

the concentration on the vial in marker is the most important step

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u/elodie_grimaldi2 points·26 days ago

dosing errors come from people reconstituting two vials differently and forgetting which is which

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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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