Final answer:
pH measurement is accurate using a pH electrode in ABG measurement. PaO2 is measured in ABG analysis rather than by pulse oximetry, and PaCO2 is indeed measured using a CO2 electrode.
Step-by-step explanation:
In the context of Arterial Blood Gas (ABG) measurement, the statement about pH measurement using a pH electrode is true. pH measurement is done in laboratories using digital pH meters or pH paper. A specially designed electrode is calibrated with known pH solutions, and then it is used to measure pH of blood. This helps determine whether the blood is in acidosis, the normal range, or alkalosis. On the other hand, PaO2 (Partial Pressure of Oxygen) measurement is not done via pulse oximetry; instead, it is measured in an ABG analysis. Pulse oximetry is a non-invasive method that estimates the oxygen saturation level (SpO2) but not the PaO2 directly. Similarly, PaCO2 (Partial Pressure of Carbon Dioxide) is measured using a CO2 electrode in ABG analysis, not via pulse oximetry or basic electrolyte panels.