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c/reconstitution·submitted 2 months ago by u/julia_erdogan

unpopular opinion: reconstitution is massively overrated

PSAbranch of 9 comments

Long-ish post, sorry. tl;dr at the bottom. I have been tracking concentration against eGFR for 27 weeks because I could not find anyone who had. The correlation is weaker than I expected, which is itself mildly interesting given how confidently people link the two in here. Caveats up front: one person, one lab, one…

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9 comments, started 2 months ago
u/arto_falk127 points·2 months ago

Are you using a u-100 or u-40 syringe? That changes everything.

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u/priya_guerrero41 points·2 months ago

u-100 syringe, not u-40, or your math is off by factor of 24

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u/zaid_balogun23 points·2 months ago

Small correction: the trial was 19 weeks, not 15. Does not change your point but people will quote it.

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u/dexa_twice_yearlybody comp15 points·2 months ago

Small correction: the trial was 19 weeks, not 15.

Adding to this: mg/mL is doing more work than the comment implies.

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u/hub_opssite staff7 points·2 months ago

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

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u/arne_restrepo2 points·2 months ago

stopper coring on the 24th draw because you keep using the same entry point. rotate.

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u/kenji_kimani17 points·2 months ago

5mg vial, 2mL water, concentration is 5/2 — write it on the vial afterwards

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u/julia_erdoganOP-37 points·2 months ago

swirl, do not shake, or you are courting oxidation

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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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