Bionet BM1, User Manual, Page: 77 / 141

Rev. 2.2
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8. SpO2
SpO2 Overview
SpO2 monitoring is a non-invasive technique that measures the total amount of oxygen in
hemoglobin. The pulse rate is measured by measuring the absorption of the wavelength of the
selected light. The light emitted by the sensor in the probe passes through the tissue and is
converted into an electrical signal by the light-detecting sensor in the probe. The monitor processes
the electrical signal and displays the waveform, %SpO2, and pulse rate on the screen as quantified
values. Red and infrared rays are passed through the capillaries of the fingertip to detect the
pulsating component, calculate HR and oxygen saturation, and alarm according to the set alarm
value.
SpO2 Precautions
SpO2 measurements are particularly sensitive to arterial and arteriolar pulse rates. Patients
experiencing shock, hypothermia, anemia, or patients taking medications that reduce arterial blood
flow may have incorrect measurements.
WARNING

The pulse oximeter cannot be used as an apnea monitor.

High oxygen levels can make premature babies vulnerable to retrolental fibroplasia.
When this is the case, do not set the maximum alarm limit to 100%, such as the
effect of turning off the alarm. Percutaneous SpO2 monitoring is recommended for
premature infants receiving supplemental oxygen.

Inspect the applied area every 2-3 hours to check the skin condition and check if it
is attached to the naked eye. If skin conditions change, move the sensor to another
location. Change the application site every 4 hours at least.