Pulse oximetry in pediatric care: Balancing advantages and limitations

Figure 1  Flow chart of the study.

Figure 2  The Timeline for the discovery and invention of pulse oximetry.

Figure 3 The pulse oximeter idea. The oximeter has a light-emitting diode on one end, and there is a phototransistor on the opposite end of the oximeter. Light-emitting diodes alternately emits red and infrared light, and part of the light will be absorbed after it passes through red blood cells in the blood vessels of the finger.