When calculated osmolarity can not be accounted as a measurement for osmolarity?
a. per 100gm/l
b. Urea 20 mm/l
Calculated osmolarity = 2 X Na + Glu + Urea (All in mmol/L)
When calculated osmolarity is less than measurement for osmolarity, this denotes increased osmolar gap (OG). This occurs with:
- Factitious hyponatremia (due to decreased water)
- Unmeasured osmotically active compounds e.g. alcohols, sugars, and ketones.
a. per 100gm/l
b. Urea 20 mm/l
Calculated osmolarity = 2 X Na + Glu + Urea (All in mmol/L)
When calculated osmolarity is less than measurement for osmolarity, this denotes increased osmolar gap (OG). This occurs with:
- Factitious hyponatremia (due to decreased water)
- Unmeasured osmotically active compounds e.g. alcohols, sugars, and ketones.