SpO2 weak perfusion is for the oxygen saturation of the monitor, the meaning is that the blood flow through the finger is not too smooth, the probe detects the blood flow signal is weak, resulting in inaccurate values of the monitor SpO2. When SpO2 weak perfusion occurs, you can change the measuring finger for measurement. It should be noted that SpO2 weak perfusion has a certain risk, when the patient’s blood pressure is low, it will cause the finger and other peripheral circulation blood flow is insufficient, so we need to pay attention to the patient’s blood pressure changes and general condition, in order to prevent delayed treatment. When SpO2 weak perfusion occurs, you can first adjust the measuring finger by yourself, and closely observe the patient’s condition.