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What is the Lab Name for Osmolality Lab Values?

Osmolality

 

What is Osmolality in terms of Nursing Labs?

Osmolality is a measure of the particles in solution. The size, shape, and charge of the particles do not impact the osmolality

 

What is the Normal Range for Osmolality?

261 – 280 mOsm/kg

 

What are the Indications for Osmolality?

• Monitor:
  • Electrolyte balance
  • Acid-Base balance
  • Hydration
• Evaluate function of antidiuretic hormone.

 

What would cause Increased Levels of Osmolality?

• Dehydration
• Azotemia
• Hypercalcemia
• Hyperosmolar Hyperglycemia Syndrome (HHS)
• Hypernatremia
• Diabetes Insipidus
• Hyperglycemia
• Mannitol therapy
• Uremia
• Severe pyelonephritis
• Shock
• Ketosis

 

 

What would cause Decreased Levels of Osmolality?

• Hyponatremia
• Syndrome of Inappropriate Antidiuretic Hormone (SIADH)
• Overhydration