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JCRMED Blood Oxygen Probe Function And Principle

Source:  Release time:2019-03-15

Pulse oximetry SPO2 refers to the percentage of blood oxygen content and blood oxygen capacity. SpO2 has been recognized as a non-invasive, fast-responding, safe, and reliable continuous monitoring indicator.
It is currently widely used in anesthesia, surgery, and PACU and ICU. According to the spectral characteristics of oxyhemoglobin (HbO2) and reduced hemoglobin (Hb) in the red and infrared regions, it can be seen in the red region (600~700nm) The absorption of HbO2 and Hb is very different. The degree of light absorption and the degree of light scattering of blood are greatly dependent on oxygen saturation Temperature. In the infrared region (800~1000nm), the absorption difference is large, and the degree of light absorption of blood is large. The degree of light scattering is mainly related to the hemoglobin content. Therefore, the absorption spectra of HbO2 and Hb are different. IBP Transducer  Therefore, the blood in the blood catheter of the oximeter can be based on HbO2 and Hb, whether it is arterial blood or venous blood saturation meter. The content accurately reflects the hemorrhage oxygen saturation.


1)Measurement Wavelengths and Output Power: Red: 660±5nm @ 2.0 mw maximum average  Infrared: 905nm±5nm @2.0 mw maximum average Oxygen Saturation Declared;
2)Accuracy Range: ±3 % of 70%~79% SpO2; ±2% of 80%~89% SpO2; ±1% of 90%~100% SpO2;
3)Pulse Rate Range: 30~245 BPM;
4)Accuracy: ±3 bpm of 150 bpm ~245 bpm; ±2 bpm of 60 bpm~149 bpm; ±1 bpm of 30 bpm~59 bpm;
5)Response time: ≤30s

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