Reference Information
Formulas Used
- Corrected Sodium: Measured Na + [(Glucose - 100) / 100] × 1.6 (or × 2.4 if glucose > 400)
- Osmolality: 2 × (Na + K) + (Glucose / 18) + (BUN / 2.8)
Clinical Interpretation
- Normal plasma osmolality: ~290 mmol/L
- Hyperosmolar: >310 mmol/L
- HHS diagnosis: >320 mmol/L (some sources >350 mmol/L)