Division of Pulmonary Medicine, Keio University, 35 Shinanomachi Shinjuku-ku, Tokyo, Japan.
Physiol Meas. 2011 Oct;32(10):1701-13. doi: 10.1088/0967-3334/32/10/015. Epub 2011 Sep 23.
Spirometry is practically the only tool to evaluate pulmonary functions. Other automatic systems comparable to spirometry are expected. A fiber-grating (FG) vision sensor is a non-contact respiratory monitoring system to detect changes in volumes by measuring the movement of laser spots on the body surface. We examined the contributions of the FG sensor to evaluating pulmonary functions. The FG sensor showed a linear correlation with spirometry in tidal volumes (TV) obtained from five controls (R = 0.98, P < 0.0001). We also showed agreement of TV between the two devices using Bland-Altman analysis. TV measured by the FG sensor were reproducible and applicable to distinct subjects. To detect airway obstruction, we performed forced expiration in controls (n = 16) and chronic obstructive pulmonary disease (COPD) patients (n = 18) with the FG sensor and spirometry. Forced expiratory volume in 1 s (FEV(1)) and FEV(1)/forced vital capacity in COPD patients were lower than those in controls by the FG sensor. In addition, prolonged expiration in natural breathing by the FG sensor was related to airflow limitation by spirometry. The FG sensor was helpful to measure volume changes and to evaluate pulmonary functions in controls and patients with COPD. Its upcoming clinical applications are promising for simplicity and feasibility.
肺量测定法实际上是评估肺部功能的唯一工具。预计会有其他与肺量测定法相当的自动系统。光纤光栅（FG）视觉传感器是一种非接触式呼吸监测系统，通过测量身体表面激光点的运动来检测体积变化。我们研究了 FG 传感器在评估肺部功能方面的贡献。FG 传感器在从 5 名对照者（R = 0.98，P < 0.0001）获得的潮气量（TV）方面与肺量测定法显示出线性相关性。我们还通过 Bland-Altman 分析显示了两种设备之间的 TV 一致性。FG 传感器测量的 TV 具有可重复性并且适用于不同的对象。为了检测气道阻塞，我们使用 FG 传感器和肺量测定法对对照者（n = 16）和慢性阻塞性肺疾病（COPD）患者（n = 18）进行强制呼气。COPD 患者的 1 秒用力呼气量（FEV1）和 FEV1/用力肺活量低于对照者。此外，FG 传感器在自然呼吸中的延长呼气与肺量测定法的气流受限有关。FG 传感器有助于测量对照者和 COPD 患者的体积变化和评估肺部功能。其即将到来的临床应用因其简单性和可行性而具有广阔的前景。
