Monitoring respiratory rates with a wearable system using a stretchable strain sensor during moderate exercise
Monitoring respiratory rates with a wearable system using a stretchable strain sensor during moderate exercise
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DOI：
10.1007/s11517-019-02062-2
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发表时间：
2019-12-01
影响因子：
3.2
通讯作者：
Ishikawa, Akira
中科院分区：
文献类型：
--
作者：
Yamamoto, Akio;Nakamoto, Hiroyuki;Ishikawa, Akira
呼吸频率是呼吸状态的敏感指标，在野外行走试验中很少测量。我们的目标是开发和验证一种非侵入性的，可穿戴的监测系统，使用可拉伸的应变传感器和伴随的算法，能够提供实时测量的呼吸在运动过程中。24名健康志愿者在步行测试协议中佩戴可拉伸传感器，包括站立，坐着，步行和拄着拐杖行走。传感器被放置在胸腔和腹部。使用Bland-Altman方法评估呼吸计数的准确度和精密度;通过自定义算法确定总呼吸时间和吸气时间比，并与使用标准流量传感器获得的测量值进行比较。来自可拉伸传感器的输出信号与流量信号高度同步。在整个测试方案中，一致性限值在3次呼吸/min以内。总呼吸时间和吸气时间比的传感器之间的差异分别小于14%和26%。无论呼吸频率或呼吸量如何，均保持一致性。可穿戴式呼吸监测系统在健康年轻人适度运动期间产生准确和精确的呼吸计数和呼吸周期总持续时间，这表明它可能在临床实践中有用。
Respiratory rate, a sensitive indicator of respiratory status, is rarely measured during the field walking test. Our objective was to develop and validate a non-invasive, wearable monitoring system using stretchable strain sensors and an accompanying algorithm capable of providing real-time measurements of respiration during exercise. Twenty-four healthy volunteers wore stretchable sensors during a walking test protocol that included standing, sitting, walking, and walking with a stick. Sensors were placed on the ribcage and abdomen. The Bland-Altman method was used to assess the accuracy and precision of breath counts; total respiration time and inspiration time ratio were determined by custom algorithms and compared with measurements obtained with the standard flow sensor. The output signal from the stretchable sensor was highly synchronized with flow signals. The limits of agreement were within 3 breaths/min throughout the test protocol. Differences between sensors for total respiration time and inspiration time ratio were less than 14% and 26%, respectively. The agreement was maintained regardless of respiratory rate or volume. The wearable respiratory monitoring system yielded accurate and precise breath counts and total duration of respiratory cycle during moderate exercise in healthy young individuals, suggesting that it might be useful in clinical practice.Graphical abstract