Final answer:
A difference between pulse oximeter and EKG readings can suggest an inaccurate oxygen saturation reading or reflect a potential medical condition. The pulse oximeter measures the percent saturation of oxygen in hemoglobin, with normal ranges between 95-100 percent. Discrepancies should prompt further evaluation.
Step-by-step explanation:
If the pulse rate noted on a pulse oximeter differs from that indicated by an EKG monitor, the oxygen saturation reading could be inaccurate. This discrepancy might suggest a measurement error or a physiological issue that warrants further investigation. The pulse oximeter uses light wavelengths to measure the percent saturation of hemoglobin with oxygen, which normally ranges from 95-100 percent.
Low readings may indicate hypoxemia or more broadly, hypoxia — a condition of low blood oxygen levels. Unlike the pulse oximeter, arterial oxygen is measured directly, often by an arterial stick, and reported as partial pressure of oxygen, in mm Hg. Differences between pulse oximeter readings and EKG-monitored pulse rates and oxygen saturation might demonstrate variations in measurements techniques or the presence of medical issues.