Finger clip type blood oxygen saturation measurement, once in about five minutes is appropriate. Oxygen saturation meter is the use of pulse oximeter infrared, the fingertip part of the oxygen saturation detection, so as to determine whether the patient is hypoxia, is one of the clinically important detection indexes, the general time in five minutes is appropriate, the oxygen concentration of 95% above the normal phenomenon, less than 90% of the hypoxemia, relevant measures should be taken to improve the oxygen supply. Oxygen probe placement position and blood pressure measurement of the arm separately, nails should not be too long, hands replacement measurement, appropriate tightness, monitoring of oxygen saturation process should be kept quiet, to avoid substantial movement. Finger clip blood oxygen measurement once how much time, but also according to their own situation, under the formal guidance of the doctor for measurement; test found abnormal, please consult a doctor in time for treatment, so as to avoid delaying the condition.