The Siggaard-Andersen alignment nomogram is used for which of the following?
a. Calculating pH
b. Measuring PCO2
c. Calculating sodium (Na+), potassium (K+), chloride (Cl–), and calcium (Ca++)
d. Calculating actual and standard bicar-bonate
ANS: D
The Siggaard-Andersen alignment nomogram is used to calculate the actual and standard bicar-bonate, buffer base, and base excess concentrations.
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