Noncontact Measurement of Oxygen Saturation with Dual Near Infrared Imaging for Daily Health Monitoring
Noncontact Measurement of Oxygen Saturation with Dual Near Infrared Imaging for Daily Health Monitoring
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使用双近红外成像非接触式测量血氧饱和度，用于日常健康监测
DOI：
10.1109/sii52469.2022.9708812
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Sankai Yoshiyuki
中科院分区：
文献类型：
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作者：
Nakagawa Koji;Kawamoto Hiroaki;Sankai Yoshiyuki
血氧饱和度是检查肺功能是否正常以及患者是否呼吸正常的关键指标。每天测量SpO2有助于检测与生活方式相关的阻塞性睡眠呼吸暂停综合征(OSAS)的早期迹象，并有助于观察被迫在家疗养的COVID19阳性患者的身体状况。在连续和长期测量的情况下，生命体征的测量应采用非接触式方法，以避免给受试者带来负担。在这项研究中，我们开发了一个使用近红外摄像机测量血氧饱和度的系统，并评估了所提出的系统和算法的有效性。单个近红外摄像机交替记录嘴唇的两幅近红外图像(760 nm和890 nm)，作为每个波长的图像。我们招募了5名参与者，在参与者屏气的情况下，使用所开发的系统测量他们的血氧饱和度，模拟低氧饱和度状态。血氧饱和度(100%~79%)的均方根误差(RMSE)为1.68。高氧饱和度、减饱和和再饱和时的RMSE分别为0.98和2.14。此外，我们证实，嘴唇和手指的减饱和时间存在差异。实验结果证实了我们研制的系统能够以非接触式的方式有效地测量血氧饱和度。
Oxygen saturation is a key indicator in checking proper lung functioning, and whether the patient is breathing properly. Daily measurement of SpO2is useful for detecting early signs of obstructive sleep apnea syndrome (OSAS), which is lifestyle-related, and to observe the physical condition of COVID19-positive patients who are forced to recuperate at home. In the case of continuous and long-term measurement, the vital sign should be measured by a non-contact method to avoid burdening the subject. In this study, we developed a system to measure oxygen saturation using a near-infrared camera, and assessed the effectiveness of the proposed system and algorithm. A single near-infrared camera recorded dual near-infrared images (760 nm and 890 nm) of the lips alternately as images of each wavelength. We enrolled five participants and measured their oxygen saturation using the developed system under the condition that the participant held their breath, which simulated a low oxygen saturation state. The root-mean-square error (RMSE) for oxygen saturation (100%–79%) was 1.68. The RMSE at high oxygen saturation and de- and re-saturation were 0.98 and 2.14, respectively. Additionally, we confirmed that there was a difference in the timing of desaturation of the lips and fingers. The results of the experiment confirmed that our developed system effectively measures oxygen saturation in a noncontact manner.