Annu Int Conf IEEE Eng Med Biol Soc. 2022 Jul;2022:1939-1943. doi: 10.1109/EMBC48229.2022.9871007.
Long-term acquisition of respiratory and heart signals is useful in a variety of applications, including sleep analysis, monitoring of respiratory and heart disorders, and so on. Ballistocardiography (BCG), a non-invasive technique that measures micro-body vibrations caused by cardiac contractions as well as motion caused by breathing, snoring, and body movements, would be ideal for long-term vital parameter acquisition. Turtle Shell Technologies Pvt. Ltd.'s Dozee device, which is based on BCG, is a contactless continuous vital parameters monitoring system. It is designed to measure Heart Rate (HR) and Respiratory Rate (RR) continuously and without contact in a hospital setting or at home. A validation study for HR and RR was conducted using Dozee by comparing it to the vitals obtained from the FDA-approved Patient Monitor. This was done in a sleep laboratory setting over 110 nights in 51 subjects to evaluate HR and over 20 nights in 17 subjects to evaluate RR at the National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India. Approximately 789 hours data for HR and approximately 112 hours data for RR was collected. Dozee was able to achieve a mean absolute error of 1.72 bpm for HR compared to the gold standard ECG. A mean absolute error of ∼1.24 breaths/min was obtained in determining RR compared to currently used methods. Dozee is ideal for long-term contactless monitoring of vital parameters due to its low mean absolute errors in measuring both HR and RR. Clinical Relevance- Continuous and long-term vitals monitoring is known to enable early screening of clinical deterioration, improve patient outcomes and reduce mortality. Current methods of continuous monitoring are overly complex, costly, and rely heavily on patient compliance. The proposed remote vitals monitoring solution based on BCG was found to be at par with gold standard methods of recording HR and RR. As a result, clinicians can use it to effectively monitor patients in both the hospital and at home.
长期获取呼吸和心脏信号在各种应用中非常有用，包括睡眠分析、呼吸和心脏疾病监测等。心动体描记术（BCG）是一种非侵入性技术，可测量心脏收缩引起的微体振动以及呼吸、打鼾和身体运动引起的运动。对于长期生命参数采集来说，它是理想的选择。Turtle Shell Technologies Pvt. Ltd. 的 Dozee 设备基于 BCG，是一种非接触式连续生命参数监测系统。它旨在在医院或家庭环境中连续、无接触地测量心率（HR）和呼吸频率（RR）。通过将 Dozee 与经过 FDA 批准的患者监护仪获得的生命体征进行比较，对 HR 和 RR 进行了验证研究。这项研究在印度班加罗尔的国家心理健康与神经科学研究所（NIMHANS）的睡眠实验室中进行了超过 110 个晚上的 51 名受试者的 HR 评估和超过 20 个晚上的 17 名受试者的 RR 评估，共收集了大约 789 小时的 HR 数据和大约 112 小时的 RR 数据。与金标准心电图相比，Dozee 能够实现 HR 的平均绝对误差为 1.72 bpm。与目前使用的方法相比，RR 的平均绝对误差约为 1.24 次/分钟。Dozee 由于其在测量 HR 和 RR 方面的平均绝对误差较低，因此非常适合长期非接触式生命参数监测。临床相关性-连续和长期生命体征监测已知可实现早期临床恶化筛查，改善患者结局并降低死亡率。目前的连续监测方法过于复杂、昂贵，并且严重依赖患者的依从性。基于 BCG 的远程生命体征监测解决方案被发现与记录 HR 和 RR 的金标准方法相当。因此，临床医生可以使用它在医院和家中有效地监测患者。
