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Notes for using finger oxygen monitor

May 09, 2020

Finger oxygen monitor is a household fitness monitoring product that can lightly pinch the fingertips for a few seconds, and can measure the human body oxygen content (judgment of human hypoxia) and heart rate anytime, anywhere. The accuracy of blood oxygen saturation is affected by the following external factors, which requires our attention and corresponding intervention measures to achieve a more reliable measurement effect.

The following are some common problems and solutions when using finger oxygen monitor:

1. Effects of local blood supply (including cold fingertips, excessive limb activity, poor peripheral blood circulation, etc.): the normal operation of the pulse oximeter depends on good perfusion of tissues, when the above conditions occur at the fingertips It will show insufficient pulse signal, low blood oxygen saturation or no results. Therefore, during monitoring, attention should be paid to keeping the finger (toe) warm and ensuring that there is no excessive violent activity before the measurement, and the measurement room temperature should be kept at 25 ° C to 28 ° C.

2. The influence of skin pigments (including nail polish, excessively thick skin, and skin pigmentation, etc.): local skin too thick can affect the penetration of light. Nail polish or other organic dyes on nails may interfere with the absorption of pulse oximeter light waves Make the oximeter reading inaccurate. Especially blue nail polish has a great influence on the detection value and lead to low values; red, purple, transparent nail polish has less effect. You should choose fingers with thin skin and no pigmentation to avoid monitoring error, and avoid using fingernails (toes) with nail polish or other colored dyes as the detection site, or wipe them off and then test again.

3. The probe is not aligned with the measured part : when the probe has dust and other foreign objects, it can cover the light source and the light sensor, resulting in error of the result and even cannot be monitored. Long nails and artificial nails can interfere with the alignment of the probe with the tissue and affect the SpO2 reading. In addition, the depth and direction of the finger insertion into the head and excessive movement of the monitoring limb can cause the displacement of the finger cuff, affecting the alignment of the probe with local tissue, resulting in a low or no SpO2 reading. Therefore, it is necessary to pay attention to the nail length and the correct position of the finger to be measured during the measurement.

In addition, when using finger oxygen monitor, it will also be affected by the external strong light, the patient's disease and the effects of taking medication, so when measuring you need to read the instructions in advance and understand the precautions to achieve better measurement effect.


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