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Serum Osmolarity

Serum osmolarity measures the body's electrolyte-water balance.

Serum osmolarity is proportional to the sum of blood urea nitrogen, serum glucose, serum potassium and serum sodium.

Formula

QuantityVariable[Subscript["S", "osm"], "Osmolarity"] == Quantity[1, IndependentUnit["milliosmoles"]/"Liters"]*(Quantity[0.35714285714285715, "Deciliters"/"Milligrams"]*QuantityVariable["BUN", "MassDensity"] + Quantity[1/18, "Deciliters"/"Milligrams"]*QuantityVariable["GLU", "MassDensity"] + Quantity[2, "Liters"/"Millimoles"]*(QuantityVariable[Subscript["S", "K"], "Molarity"] + QuantityVariable[Subscript["S", "Na"], "Molarity"]))

symbol description physical quantity
Sosm serum osmolarity "Osmolarity"
BUN blood urea nitrogen "MassDensity"
GLU serum glucose "MassDensity"
SK serum potassium "Molarity"
SNa serum sodium "Molarity"

Forms

Examples

Get the resource:

In[1]:=
ResourceObject["Serum Osmolarity"]
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Get the formula:

In[2]:=
FormulaData[ResourceObject["Serum Osmolarity"]]
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Use some values:

In[3]:=
FormulaData[ ResourceObject[ "Serum Osmolarity"], {QuantityVariable["BUN","MassDensity"] -> Quantity[10, ("Milligrams")/("Deciliters")], QuantityVariable[ \!\(\*SubscriptBox[\("S"\), \("Na"\)]\),"Molarity"] -> Quantity[140, ("Millimoles")/("Liters")]}]
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