Apr. 30 , 2019
The traditional electrochemical method of measuring oxygen saturation use Disposable Spo2 Sensor is to first collect blood from the human body (the most commonly used is to take arterial blood), and then use the blood gas analyzer for electrochemical analysis, and measure the partial pressure of arterial oxygen (PaO2) within a few minutes. Arterial oxygen saturation (SaO2) was calculated. Because this method requires arterial puncture or intubation, it causes pain to the patient and cannot be continuously monitored, so when it is in a dangerous situation, it is not easy for the patient to receive timely treatment. The advantage of the electrochemical method is that the measurement result is accurate and reliable, the disadvantage is that it is cumbersome and cannot be continuously monitored, and it is a damaged oximetry method.
The optical method is a new optical measurement method that overcomes the shortcomings of the electrochemical method. It is a continuous non-invasive blood oxygen measurement method, which can be used in an emergency ward, an operating room, a recovery room, and a sleep study. At present, pulse oximetry (NIHON BSM 2301 Spo2 Sensor) is used. The principle is to detect the change of blood absorption by blood, and to measure the percentage of oxyhemoglobin (HbO2) in total hemoglobin (Hb). Get SpO2. The advantage of this method is that it can continuously measure the human body without damage, and the instrument is simple and convenient to use, so it has been paid more and more attention. The disadvantage is that the measurement accuracy is lower than that of the electrochemical method, and the error caused by the lower blood oxygen value is large. Ear oximeters, multi-wavelength oximeters and the newly introduced pulse oximeter have appeared. The measurement error of the latest pulse oximeter can be controlled within 1% to meet the requirements of clinical use. Although they are not satisfactory in some respects, the clinical benefits they generate are widely recognized.