Respiratory rate (RR) is known to be a more accurate predictor of clinical deterioration than other vital signs. However, there were few respiration measurement devices certified as medical devices that could be used in daily clinical settings. Therefore, using a bult-in microcontroller (72×57×12 mm) instead of a personal computer, we developed a portable stand-alone respiration measurement device with minimum workload in computing that can be used for non-contact measurement in 30 s using a Doppler radar. In this study, the problems of respiration measurement using a Doppler radar, such as miscounting of respiratory peaks were clarified, and proposed device with respiratory peaks miscount prevention algorithm achieved high accuracy RR measurement. Clinical testing was conducted on pediatric outpatients of Children's Medical Center, Showa University Koto Toyosu Hospital. The measurement accuracy of the system was confirmed to be comparable to the respiration measurement accuracy of stationary certified medical devices used in hospital, such as capnometers and the chest wall impedance method used in bedside monitors.

中文翻译：

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使用多普勒雷达开发独立便携式呼吸频率监测仪

众所周知，呼吸频率 (RR) 比其他生命体征更能准确预测临床恶化。然而，很少有呼吸测量设备被认证为可用于日常临床环境的医疗设备。因此，我们使用内置微控制器（72×57×12 mm）代替个人计算机，开发了一种计算工作量最小的便携式独立呼吸测量装置，可在30 s内进行非接触式测量多普勒雷达。在这项研究中，澄清了使用多普勒雷达进行呼吸测量时存在的呼吸峰值误计数等问题，并提出了具有呼吸峰值误计数预防算法的装置，实现了高精度的RR测量。对昭和大学江东丰洲医院儿童医疗中心的儿科门诊患者进行了临床测试。经证实，该系统的测量精度可与医院使用的固定式认证医疗设备（例如二氧化碳计和床边监护仪中使用的胸壁阻抗法）的呼吸测量精度相媲美。