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291 mOsm/kg
Sep 18, 2026. Calculated from other results. 4 results in this record.
Judged against the usual range for this sex and age. The lab’s own range wasn’t on the report. The open ring is the result before this one.
Calculated Osmolality has been in the usual range at all 4 tests since Oct 2023.
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In the usual range Above Below
Highest 294 mOsm/kg (Jun 2025), lowest 289 mOsm/kg (Oct 2024).
The report didn’t print Calculated Osmolality, so we worked it out from the Sodium, Glucose and BUN from the same day.
Osmolality (mOsm/kg) = 2 × Na (mmol/L) + glucose (mg/dL) ÷ 18 + BUN (mg/dL) ÷ 2.8. In SI units: 2 × Na + glucose + urea, all in mmol/L. Some analyzers use 1.86 × Na + glucose ÷ 18 + BUN ÷ 2.8 + 9, and some add blood alcohol (mg/dL) ÷ 5.
AI assistant. It answers from this record’s own numbers and can still make mistakes, so check important details against the report. It doesn’t diagnose.