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Acid-Base Balance

by "Grog" (Alan W. Grogono), Professor Emeritus, Tulane University Department of Anesthesiology

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Acid-Base Diagram:

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Acid-Base Diagram Icon"Pruning a rose or building a sandcastle might seem like common activities, but when you see them visualized on paper in wordless, step-by-step diagrams, you'll discover them anew." – About Wordless Diagrams by Nigel Holmes 2005.
Acid-Base Balance Diagram: All the Typical Zones
Acid-Base Balance Diagram: All the Typical Zones

Acid-Base Balance Diagram: All the Typical Zones

Introduction: This Interactive Acid-Base Diagram is based on a paper written by Schlichtig R, Grogono AW, and Severinghaus JW. The red and blue zones on the right (click to enlarge) are based on this paper and accurately represent a group. However, a few individuals will lie outside each zone; so, always examine the patient carefully as well!

The Two Axes are the Respiratory Component (PCO2) and the Metabolic Component – Standard Base Excess (SBE). The lines for pH and Bicarbonate are also displayed but neither, alone, measures the Respiratory or the Metabolic Component.

Two Versions:

On the Other Diagram Pages you can enter your Own Data, view Selected Examples, or Test Yourself.

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Acid-Base Tutorial
Alan W. Grogono
Small Logo Copyright Jan. 2020.
All Rights Reserved
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