LPOW Bluetooth Pulse Oximeter Fingertip, OLED Display, Blood Oxygen Saturation Monitor (SpO2) and Pulse Rate, Perfusion Index with Alarm, APP for Smart Tracking, Batteries and Lanyard Included LPOW cotton pads

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LPOW Bluetooth Pulse Oximeter Fingertip, OLED Display, Blood Oxygen Saturation Monitor (SpO2) and Pulse Rate, Perfusion Index with Alarm, APP for Smart Tracking, Batteries and Lanyard Included LPOW cotton padsHow does the Plethysmograph and PI help? Plethysmograph The SpO2 Waveform Each wave corresponds to a heartbeat and the amplitude to the amount of blood detected in your blood vessels. When the wave amplitude is consistent (as shown in the figure), the pulse oximeter is optimized and readings can be taken. Perfusion Index The Perfusion Index (PI) informs you of the strength of your pulse. If the PI value is less than 0. 2%, this means that your hands