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Article: Answering your questions; normal range for anion gap.(Tips from the clinical experts)(Interview)(Column)
- Article from:
- Medical Laboratory Observer
- Article date:
- June 1, 2007
CopyrightCOPYRIGHT 2007 Nelson Publishing. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Q What is the normal range for anion gap with the formula Na-(Cl+CO2)? With the formula (Na+K)- (Cl+CO2)? Which one should be used?
A The anion gap is defined as the difference between the major measured cation, sodium, and the major measured anions, chloride, and bicarbonate. The anion gap is usually calculated as [N[a.sup.+]-(C[l.sup.-] + HC[O.sub.3.sup.-])]. Other cations present in blood but not normally included in the anion gap calculation include potassium, calcium, magnesium, and IgG. Likewise, there are a number of anions present in blood that are not included in the calculation. These include sulfate, phosphate, and most plasma proteins. In plasma, ...