Calculates Serum Osmolality and then Calculates Gap from Measured Osmolality

Calculated Osmolality = 2*Na + (Urea/2.8) + (Glucose/18) + (Ethanol/4.6);
Osmolal Gap = Measured Osmolality - Calculated Osmolality

Can be used to evaluate patients with Hyperosmolar Hyperglycemic State.