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Calculated Serum Osmolality Formula

GoCalculated Serum Osmolality using Osmolar Gap Formula

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Calculated Serum Osmolality refers to the calculated concentration of dissolved particles of chemicals and minerals such as sodium and other electrolytes in given serum. Check FAQs

O serum = (2 \cdot [Na] serum) + (\frac{G serum}{18}) + (\frac{BUN}{2.8})

O_serum - Calculated Serum Osmolality?[Na]_serum - Serum Sodium?G_serum - Serum Glucose?BUN - Blood Urea Nitrogen?

Calculated Serum Osmolality Example

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Here is how the Calculated Serum Osmolality equation looks like with Values.

Here is how the Calculated Serum Osmolality equation looks like with Units.

Here is how the Calculated Serum Osmolality equation looks like.

39.9746 = (2 \cdot 0.0009) + (\frac{20.5}{18}) + (\frac{7.5}{2.8})

39.9746mmol/kg = (2 \cdot 0.0009mmol/L) + (\frac{20.5mg/dL}{18}) + (\frac{7.5mg/dL}{2.8})

39.9746 = (2 \cdot 0.0009) + (\frac{20.5}{18}) + (\frac{7.5}{2.8})

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Calculated Serum Osmolality Solution

Follow our step by step solution on how to calculate Calculated Serum Osmolality?

FIRST Step Consider the formula

O serum = (2 \cdot [Na] serum) + (\frac{G serum}{18}) + (\frac{BUN}{2.8})

Next Step Substitute values of Variables

∴

O serum = (2 \cdot 0.0009mmol/L) + (\frac{20.5mg/dL}{18}) + (\frac{7.5mg/dL}{2.8})

Next Step Convert Units

∴

O serum = (2 \cdot 0.0009mol/m³) + (\frac{0.205kg/m³}{18}) + (\frac{0.075kg/m³}{2.8})

Next Step Prepare to Evaluate

∴

O serum = (2 \cdot 0.0009) + (\frac{0.205}{18}) + (\frac{0.075}{2.8})

Next Step Evaluate

∴

O serum = 0.0399746031746032mol/kg

Next Step Convert to Output's Unit

∴

O serum = 39.9746031746032mmol/kg

LAST Step Rounding Answer

∴

O serum = 39.9746mmol/kg

Calculated Serum Osmolality Formula Elements

Variables

Calculated Serum Osmolality

Calculated Serum Osmolality refers to the calculated concentration of dissolved particles of chemicals and minerals such as sodium and other electrolytes in given serum.

Symbol: O_serum

Measurement: MolalityUnit: mmol/kg

Note: Value should be greater than 0.

Formulas to find Calculated Serum Osmolality

Serum Sodium

Serum Sodium is the concentration of sodium present in the serum of blood.

Symbol: [Na]_serum

Measurement: Molar ConcentrationUnit: mmol/L

Note: Value should be greater than 0.

Formulas to find Serum Sodium

Serum Glucose

Serum Glucose is the amount of glucose present in the serum of blood.

Symbol: G_serum

Measurement: Mass ConcentrationUnit: mg/dL

Note: Value should be greater than 0.

Formulas to find Serum Glucose

Blood Urea Nitrogen

Blood Urea Nitrogen is a serum byproduct of protein metabolism. It is one of the oldest prognostic biomarkers in heart failure.

Symbol: BUN

Measurement: Mass ConcentrationUnit: mg/dL

Note: Value should be greater than 0.

Formulas to find Blood Urea Nitrogen

Other Formulas to find Calculated Serum Osmolality

Go Calculated Serum Osmolality using Osmolar Gap

O serum = MO - OG

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SP i = - \log 10 (ω)

Go Plasma Osmolality

O plasma = (2 \cdot Sodium plasma)

Go Plasma Concentration using Plasma Osmolality

Sodium plasma = \frac{O plasma}{2}

How to Evaluate Calculated Serum Osmolality?

Calculated Serum Osmolality evaluator uses Calculated Serum Osmolality = (2*Serum Sodium)+(Serum Glucose/18)+(Blood Urea Nitrogen/2.8) to evaluate the Calculated Serum Osmolality, The Calculated Serum Osmolality formula is defined as the number of moles of dissolved particles (charged or uncharged solutes) per kilogram of serum. Calculated Serum Osmolality is denoted by O_serum symbol.

How to evaluate Calculated Serum Osmolality using this online evaluator? To use this online evaluator for Calculated Serum Osmolality, enter Serum Sodium ([Na]_serum), Serum Glucose (G_serum) & Blood Urea Nitrogen (BUN) and hit the calculate button.

FAQs on Calculated Serum Osmolality

What is the formula to find Calculated Serum Osmolality?

The formula of Calculated Serum Osmolality is expressed as Calculated Serum Osmolality = (2*Serum Sodium)+(Serum Glucose/18)+(Blood Urea Nitrogen/2.8). Here is an example- 39974.6 = (2*0.0009)+(0.205/18)+(0.075/2.8).

How to calculate Calculated Serum Osmolality?

With Serum Sodium ([Na]_serum), Serum Glucose (G_serum) & Blood Urea Nitrogen (BUN) we can find Calculated Serum Osmolality using the formula - Calculated Serum Osmolality = (2*Serum Sodium)+(Serum Glucose/18)+(Blood Urea Nitrogen/2.8).

What are the other ways to Calculate Calculated Serum Osmolality?

Here are the different ways to Calculate Calculated Serum Osmolality-

Calculated Serum Osmolality=Measured Osmolality-Osmolar Gap

Can the Calculated Serum Osmolality be negative?

No, the Calculated Serum Osmolality, measured in Molality cannot be negative.

Which unit is used to measure Calculated Serum Osmolality?

Calculated Serum Osmolality is usually measured using the Millimole per Kilogram[mmol/kg] for Molality. Mole per Kilogram[mmol/kg] are the few other units in which Calculated Serum Osmolality can be measured.

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Calculated Serum Osmolality Formula

​GoCalculated Serum Osmolality using Osmolar Gap Formula

Calculated Serum Osmolality Example

Calculated Serum Osmolality Solution

Calculated Serum Osmolality Formula Elements

Other Formulas to find Calculated Serum Osmolality

Other formulas in Osmolality category

How to Evaluate Calculated Serum Osmolality?

FAQs on Calculated Serum Osmolality

Variable Name

GoCalculated Serum Osmolality using Osmolar Gap Formula