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      基于逐口气法的人体能量代谢检测系统设计与验证

      Design and Verification of a Human Energy Metabolism Detection System Based on Breath-by-Breath Method

        摘要
      • 摘要:
        目的 设计一种基于逐口气法的人体能量代谢检测系统，以实现人体能量代谢的实时准确测量。
        方法 首先，采用间接测热法实时采集人体每口呼吸气的流量和浓度信息；然后，通过特征对齐和每口气数据分割计算氧气消耗量（Q_\mathrmO_2 ）、二氧化碳产生量（Q_\mathrmCO_2 ）；最后，根据Weir公式计算人体能量代谢指标。另外，该文还开展了与国际先进代谢测量设备MGC ULTIMA SYSTEM PFX CARDIO2的对比验证实验。
        结果 该系统测量的代谢指标数据均落在Bland-Altman分析的一致性区间内。
        结论 该系统与MGC的测量结果具有较高的一致性，可以实时准确测量人体能量代谢，为临床营养评估及诊疗提供数据支撑。

         

        Abstract:
        Objective To accurately measure human energy metabolism with high temporal resolution, a respiratory gas analysis system was designed using a breath-by-breath approach.
        Methods Firstly, indirect calorimetry was employed in respiratory gas analysis to measure the respiratory flow and concentration signals in real-time. Secondly, oxygen consumption Q_\mathrmO_2 and carbon dioxide production Q_\mathrmCO_2 were calculated through respiratory characteristic alignment and respiratory signal segmentation. Finally, metabolic indexes were calculated according to the Weir formula. Furthermore, a controlled trial was formulated for validation comparisons with the MGC ULTIMA SYSTEM PFX CARDIO2.
        Results The results indicate that the data points of metabolic indexes measured by this system all fall within the confidence interval when compared with those of the MGC.
        Conclusion The system has high consistency with the MGC measurement results. Thus, the system can accurately measure metabolism in real-time and provide data support for clinical nutrition assessment and therapy.

         

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