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c/coldchain·submitted 4 months ago by u/sterile_field_steph

21 months in and excursion is still the thing I get wrong

Databranch of 10 comments

Trying to settle this properly because the thread from last year went in circles. The claim: excursion matters. The counter-claim: it is measurement error. Both sides have been asserting it confidently for about 17 months without either producing anything. What would actually settle it is 29 people measuring the same…

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This branch

10 comments, started 4 months ago
u/sequence_checkerresearch peptides0 points·4 months ago

This is the "correlation is mechanism" thing again. You changed three variables at once.

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[removed]1 point·4 months ago

[removed by moderator]

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u/milos_vestergaard1 point·4 months ago·edited

customs clearance often breaks the cold chain, factor that in

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u/rohan_steiner1 point·4 months ago

lane reports need origin, destination, carrier, and actual transit days

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u/jarno_adeyemi1 point·4 months ago

a warm courier van is a bigger problem for a mixed vial than for dry powder

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u/meera_sandvik1 point·4 months ago

a warm courier van is a bigger problem for a mixed vial than for dry powder

Adding to this: data logger is doing more work than the comment implies.

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u/ewan_tulloch1 point·4 months ago

Which carrier and route?

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u/marit_laurent1 point·4 months ago

customs clearance often breaks the cold chain, factor that in

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u/india_generic_g1 point·4 months ago·edited

Denmark to Denmark takes 9 days on average, variance is 34 days

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u/cesar_teixeira1 point·4 months ago·edited

This is the "correlation is mechanism" thing again.

Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.

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About c/coldchain

Temperature and stability in the real world: what an excursion actually costs you, why lyophilised powder is far more forgiving than reconstituted solution, how to read a logger CSV, and how to photograph a failed shipment so the conversation with the vendor is short.

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  1. Excursion claims need a logger trace or a photo taken at unboxing. "It felt warm" is not data.
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