Decide your rounding rule before you need it
Decide your rounding rule before you need it
Blog Article
Rounding decisions made in the moment are inconsistent, and inconsistency is the thing that makes a dose history hard to read later. Deciding the rule once, in advance, costs nothing and removes a recurring small judgement.
A workable rule has three parts. Which direction you round when a volume lands between marks. What size of discrepancy you consider acceptable before you remix at a different concentration instead. And whether you record the intended volume, the drawn volume, or both.
Both is the right answer to the third, and it is the part people skip. Intended and actual kept side by side means that a systematic rounding bias becomes visible after a few weeks rather than hiding inside a column of tidy intended figures.
On direction, consistency matters more than the choice. Always rounding to the nearest mark is fine. Alternating up and down to average it out sounds clever and produces a history nobody can interpret.
On magnitude, pick a threshold and honour it. If rounding would move the dose by more than some small percentage you have decided in advance, that is a signal about the concentration or the syringe, not something to absorb quietly.
Setting the rule up front is easier when the numbers are in front of you. Running the planned doses through a peptide dose calculator at mixing time shows you immediately whether rounding is going to be an issue for this vial at all.
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