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⭐Measurement values⭐ SpO2：Oxygenated hemoglobin saturation PR：Heart rate pulse repetition rate PI：PI value indicated by blood perfusion RR：Respiratory rate monitoring function RR value ⭐Packing⭐ 1 x Fingertip Pulse Oximeter 1 x English instruction manual 1 x Lanyard 1 x Black Pouch 1 x Retail Box ✅ Oxygenated hemoglobin saturation (SpO2) Oxygenometer saturation: an important indicator reflecting the oxygen status in the body. It is generally believed that the normal value of blood oxygen satiety should not be less than 94%, and less than 94% is considered as insufficient oxygen supply. ✅Heart rate pulse repetition rate (PR)BPM Heart Rate: It is the number of times the Heart beats per minute.That is, in a certain period of time, the heart beat fast or slow meaning.The same person, the heart rate slows down during quiet or sleep, and increases during exercise or emotional agitation! ✅PI value indicated by blood perfusion PI is the blood Perfusion Index (PI), which reflects the pulse of blood flow, that is, reflects the blood Perfusion ability.The larger the pulsating blood flow, the larger the pulsating component and the larger the PI value.Therefore, both the site of measurement (skin, nails, bones, etc.) and the patient's own blood perfusion (arterial blood flow) will affect the PI value.Since sympathetic nerves affect heart rate and arterial blood pressure (which affects the pulse and arterial blood flow), the body's neuroregulatory system or mental state can also indirectly affect PI values.Therefore, the PI value will be different under different anesthetic states. ✅Respiratory rate monitoring function RR value A normal adult breathes about 16 to 20 times per minute.The ratio of respiration to pulse is 1:4, and children breathe faster than adults, up to 20 ~ 30 times per minute;A newborn can breathe at a rate of 44 breaths per minute.Breaths per minute.Respiratory rate varies with age, sex, and physiological state.