To validate patient readings obtained from a transcutaneous blood gas monitor, what should you do?
a. Measure and compare the PtcO2 and PtcCO2 at three or more different sites.
b. Compare the monitor's readings to a concurrent pulse oximetry reading.
c. Compare the monitor's readings to those obtained with a concurrent ABG sample.
d. Compare the patient reading to those obtained when calibrating the sensor.