Abstract
The essence of the physical chemical approach to acid–base balance is the understanding that there are three variables that are essential in determining blood pH: partial pressure of CO2, strong ion difference (SID), and total weak acid concentration (ATOT). Neither H+ nor HCO3 − can change unless one or more of these three variables change. Strong ions are completely dissociated in blood plasma; weak acids by contrast alter their ionization with changes in pH. While it is possible to describe an acid–base disorder in terms of H+ or HCO3 − concentrations or base excess, it is incorrect to analyze the pathology, and potentially dangerous to plan treatment, on the basis of altering these variables.
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Kellum, J.A. (2010). Acid–Base Balance. In: Jörres, A., Ronco, C., Kellum, J. (eds) Management of Acute Kidney Problems. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-69441-0_15
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