RT Book, Section A1 Arora, Nayan A1 Jefferson, J. Ashley A2 Papadakis, Maxine A. A2 McPhee, Stephen J. A2 Rabow, Michael W. A2 McQuaid, Kenneth R. SR Print(0) ID 1184182724 T1 Acid-Base Disorders T2 Current Medical Diagnosis & Treatment 2022 YR 2022 FD 2022 PB McGraw-Hill Education PP New York, NY SN 9781264269389 LK accessmedicine.mhmedical.com/content.aspx?aid=1184182724 RD 2024/04/19 AB Acid-base regulation is the maintenance of normal hydrogen ion concentration. The normal plasma hydrogen ion concentration is 40 nmol/L, which corresponds to a pH of 7.4 (the negative log of its concentration). Any decrease in blood pH represents an increase in hydrogen ion concentration (acidemia), while an increase in blood pH represents a decrease in hydrogen ion concentration (alkalemia). Bicarbonate (HCO3–) is the primary acid buffer in the body and the relationship between acid and base behavior in the body is shown by the Henderson-Hasselbalch equation below. Note that because carbon dioxide is primarily measured as a partial pressure, the denominator contains a conversion factor.