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

the dead space question that gets asked weekly, answered properly

PSAbranch of 6 comments

Trying to settle this properly because the thread from last year went in circles. The claim: reconstitution matters. The counter-claim: it is measurement error. Both sides have been asserting it confidently for about 9 months without either producing anything. What would actually settle it is 27 people measuring the…

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This branch

6 comments, started 2 years ago
u/janek_ferrari642 points·2 years ago

never post a calculation as advice without stating the concentration

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[deleted]467 points·2 years ago

[deleted]

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u/sleep_apnea_sam677 points·2 years ago

u-100 syringe, not u-40, or your math is off by factor of 7

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u/vito_beaulieu562 points·2 years ago

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

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u/marta_weissOP285 points·2 years ago

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

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u/karl_fischer_kev158 points·2 years ago

Sceptical. If this were true we would see it reflected in the data and we do 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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