Measurement of Blood Oxygen

The measurement principle of oximeter is based on the absorption spectra of reduced hemoglobin (Hb) and oxygenated hemoglobin (HbO2) in red and near-red light. The working principle is to use photoelectric blood oxygen detection technology combined with volumetric sphygmography technology. Two beams of light with different wavelengths are irradiated to the finger end of the human body, and the measurement signal is obtained by the photosensitive component. After processing the obtained information, the bleeding oxygen saturation value is analyzed.

Pulse rate can also be tested with an oximeter. It reflects the irregular heartbeat, if the heartbeat is very regular, then the PR will be relatively high; If the difference in heartbeat interval is large, your PR will be relatively low. This irregular heartbeat is controlled by the autonomic nerve. A lower PR means a higher risk of anxiety, depression, and cardiovascular mortality. People with higher PR generally have better cardiovascular function and stress resistance.

Blood oxygen saturation (SpO2)

The SpO2 reading is an estimate of the amount of oxygen in your blood. A SpO2 reading of 95% or higher is generally considered a normal oxygen level. However, an SpO2 reading of less than 92% indicates that your blood saturation is poor. Undersaturation can lead to a range of adverse health conditions, including chest pain, shortness of breath, and rapid heart rhythm.

Pulse rate

Pulse rate is an estimate of the number of contractions your heart makes per minute. Normal pulse rate values for adults are in the range of 60 to 100 beats per minute (bpm). For most people, a pulse rate below 60 bpm indicates abnormally slow heart action, also known as bradycardia. Bradycardia can cause a number of problem symptoms, including fainting, fatigue, chest pain, and memory problems.

For most healthy individuals, an oxygen saturation of 95% is considered normal. A level of 92% indicates underlying hypoxemia, or lack of oxygen in human tissues. At low altitudes and in young people, blood oxygen saturation is generally between 98% and 100%. It usually doesn't go below 95%. But 90 to 95% of older people are probably normal.

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