Comparison on differences in measurement data among different models of finger clip oximeters

Zhou Shuai; Fang Yipeng; Zhou Wei; Xie Keliang

doi:10.3969/j.issn.1674-7151.2025.01.016

Abstract：Objective To analyze the variability in measurement data among different models of finger clip oximeters,and provide more precise reference information for clinical decision-making.Methods The blood gas analysis indicator[arterial oxygen saturation(SaO2)]and pulse oxygen saturation(SpO2)data measured by three different models(Draeger-Infinity Kappa,Mindray-N12 and GE-B650)of finger clip oximeters from 50 critically ill patients admitted to the intensive care medicine department of Tianjin Medical University General Hospital from April to October 2023 were collected.According to different levels of SaO2,the patients were divided into(75.0±2.5)%group,(80.0±2.5)%group,(85.0±2.5)%group,(90.0±2.5)%group and(95.0±2.5)%group,with 10 cases in each group.The differences in SpO2 data measured by different models of finger clip oximeters within each group were compared.The data distribution was presented using a heatmap and the numerical differences of SpO2 among different groups were compared using One-way analysis of variance.Results Using the SpO2 value measured by Draeger-Infinity Kappa oximeter as a reference,in(75.0±2.5)%group,(80.0±2.5)%group,(85.0±2.5)%group,(90.0±2.5)%group and(95.0±2.5)%group,the SpO2 results measured by Mindray-N12 oximeter were(111.8±4.5)%,(104.7±4.7)%,(106.3±5.3)%,(104.0±2.6)%and(102.7±1.5)%,respectively,and the SpO2 results measured by GE-B650 oximeter were(101.3±6.4)%,(98.8±4.8)%,(100.8±4.9)%,(100.4±3.8)%and(99.9±2.2)%,respectively.In low SaO2[(75.0±2.5)%]group,there were statistically significant differences in the SpO2 values measured by Mindray-N12 and GE-B650 oximeters,as well as those measured by Draeger-Infinity Kappa and Mindray-N12 oximeter.In high SaO2[(95.0±2.5)%]group,there were statistically significant differences in the SpO2 values measured by Mindray-N12 and GE-B650 oximeters,as well as those measured by Draeger-Infinity Kappa and Mindray-N12 oximeters.Conclusions The measurement of pulse oximeters is influenced by various factors,and there may be certain differences in the data measurement of critically ill patients between finger clip oximeters of different brands and models.Clinicians should take into account these differences and make comprehensive judgments based on other clinical information to ensure the scientific and accurate diagnosis and treatment decisions.