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Serum Osmolality & Osmolal Gap Calculator

Purpose:

To estimate unmeasured osmotically active compounds.

Specialty:

Endocrinology, Nutrition & Dermatology
Clinical Laboratory
Emergency Medicine & Critical Care
Emergency Medicine & Critical Care

Objective:

laboratory tests

ICD-10:

E87

Description:

The osmolal gap (also referred to as osmotic gap) is the difference between a patient's measured serum osmolality and that estimated from knowledge of the patient's sodium, glucose and SUN levels. An increased osmolal gap may be an indication of unmeasured osmotically active compounds, pseudohyponatremia or laboratory error.

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