Fingertip Oximeter

Fingertip Oximeter is performed by successively driving a red LED(660nm) and an infrared LED(910nm). The blue line shows the sensitivity curve of the receiver tube to reduced hemoglobin without oxygen molecules. It can be seen from the graph that reduced hemoglobin has a strong absorption of red light at 660nm, but a weak absorption length of infrared light at 910nm.

The main indicators of Fingertip Oximeter were pulse rate, oxygen saturation and perfusion index (PI). Oxygen saturation (SpO2 for short) is one of the important basic data in clinical medicine. Blood oxygen saturation is the percentage of the combined O2 volume to the combined O2 volume in the total blood volume.

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