Which of the following are likely to cause errors in SpO2 readings? 1. Anemia 2. Deeply pigmented skin 3. Motion due to shivering 4. Significant tachycardia
a. 1 and 3 only
b. 1, 2, and 3 only
c. 2 and 4 only
d. 1, 2, 3, and 4
ANS: B
Intense daylight and fluorescent, incandescent, xenon, and infrared light sources have caused errors in pulse oximetric readings. Anemia and deeply pigmented skin can affect the accuracy of pulse oximetry; however, the effect of anemia is not clinically significant until the hemoglobin level is markedly reduced.
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