A Smart System for the Contactless Measurement of Energy Expenditure.

A Smart System for the Contactless Measurement of Energy Expenditure.
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一种非接触式能源消耗智能测量系统。

DOI:
10.3390/s22041355
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发表时间:
2022-02-10
期刊:
Sensors (Basel, Switzerland)
影响因子:
--
通讯作者:
Forzani E
Forzani E
中科院分区:
其他
文献类型:
--
作者:
Sprowls M;Victor S;Mora SJ;Osorio O;Pyznar G;Destaillats H;Wheatley-Guy C;Johnson B;Kulick D;Forzani E

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能量消耗(EE)(千卡/天)是指导肥胖治疗的关键因素,通过CO2产生(VCO 2)(mL/min)和/或O2消耗(VO 2)(mL/min)测量。目前的技术是有限的,由于可穿戴面部配件的要求。一种新的系统,智能垫,它测量EE通过VCO 2从一个房间的环境CO2浓度瞬态。使用Smart Pad和参考仪器记录静息EE(REE)和运动VCO 2测量值,以研究测量持续时间对准确性的影响。使用已知的房间空气交换率,Smart Pad在14-19分钟的REE测量和4.8-7.0分钟的运动中显示90%的准确度(±1 SD)。此外,Smart Pad在测量具有广泛体重指数(BMI = 18.8至31.4 kg/m2)的受试者时得到了验证,成功验证了REE测量值(约1200至约3000 kcal/天)的系统准确性。此外,在14.0 m3大小的房间中,观察到受试者的VCO 2和CO2蓄积λ之间的高度相关性(p < 0.00001,R = 0.785)。这一发现导致了一个新的模式,从环境CO2的REE测量没有λ校准使用参考仪器的发展。使用独立数据集(N = 56),该模型与参考仪器测量值(y = 1.06x,R = 0.937)的一致率接近100%。
Energy Expenditure (EE) (kcal/day), a key element to guide obesity treatment, is measured from CO2 production, VCO2 (mL/min), and/or O2 consumption, VO2 (mL/min). Current technologies are limited due to the requirement of wearable facial accessories. A novel system, the Smart Pad, which measures EE via VCO2 from a room’s ambient CO2 concentration transients was evaluated. Resting EE (REE) and exercise VCO2 measurements were recorded using Smart Pad and a reference instrument to study measurement duration’s influence on accuracy. The Smart Pad displayed 90% accuracy (±1 SD) for 14–19 min of REE measurement and for 4.8–7.0 min of exercise, using known room’s air exchange rate. Additionally, the Smart Pad was validated measuring subjects with a wide range of body mass indexes (BMI = 18.8 to 31.4 kg/m2), successfully validating the system accuracy across REE’s measures of ~1200 to ~3000 kcal/day. Furthermore, high correlation between subjects’ VCO2 and λ for CO2 accumulation was observed (p < 0.00001, R = 0.785) in a 14.0 m3 sized room. This finding led to development of a new model for REE measurement from ambient CO2 without λ calibration using a reference instrument. The model correlated in nearly 100% agreement with reference instrument measures (y = 1.06x, R = 0.937) using an independent dataset (N = 56).
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