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A hood-type indirect energy testing method and device

A technology of energy testing and headgear, which is applied in diagnostic recording/measurement, medical science, diagnosis, etc. It can solve the problems of inability to analyze data in real time, the accuracy needs to be improved, and the exhalation resistance is large, so as to improve accuracy and improve Pumping efficiency, the effect of reducing the dilution ratio

Active Publication Date: 2021-04-27
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

After the test is completed, the volume of exhaled air is measured first, and then the concentration of oxygen and carbon dioxide in the air bag is analyzed using chemical analysis methods. The whole process is slow and cumbersome
Because the Douglas airbag method cannot achieve real-time data analysis, and the equipment is huge, the ventilation pipeline is closed, and the exhalation resistance is very large.
The micro-mixing chamber method collects a small amount of human exhaled gas for analysis. Compared with the Douglas air bag method, the micro-mixing chamber has the biggest advantage that it can be measured in an open breathing mode, but its accuracy is affected by sampling errors and breathing dead spaces. still needs to be improved

Method used

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  • A hood-type indirect energy testing method and device
  • A hood-type indirect energy testing method and device
  • A hood-type indirect energy testing method and device

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Embodiment Construction

[0037] Specific embodiments of the present invention A kind of hood-type indirect energy testing device such as figure 1 As shown, it includes: the first gas cylinder 1, the second gas cylinder 2, the first double-stage pressure reducing valve 3, the second double-stage pressure reducing valve 4, the first solenoid valve 5, the second solenoid valve 6, and the overflow port 7 , regulator valve 8, four-way valve 9, oxygen sensor 10, carbon dioxide sensor 11, buffer device 12, second air pump 13, first air pump 14, damper 15, air extraction pipeline 16, flow sensor 17 and hood 18.

[0038] A gas collection and mixing part composed of a hood 18, a flow sensor 17, a damper 15, and a first air pump 14 in a hood-type indirect energy testing device realizes the collection and mixing of a mixed gas composed of human exhaled gas and air. An aspirating pump 14, damper 15, flow sensor 17, and hood 18 suction ports are connected through the trachea accordingly, and the first aspirating p...

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Abstract

The invention discloses a hood-type indirect energy testing method and device, which can be used for simple and accurate measurement of the energy metabolism rate of a human body. In the present invention, the negative pressure hood is used to collect and analyze the exhaled gas of the human body, so that when calculating the energy metabolism rate, there is no need to consider the error correction of the mask and the physiological dead space, and there is no need to consider the delay correction between the flow rate and the concentration, which simplifies the calculation complexity of the test data analysis and improves the efficiency. Measurement accuracy; by designing the structure of the negative pressure hood and the corresponding adaptive pumping speed adjustment algorithm, the concentration dilution ratio is reduced; at the same time, a pressure relief device is used to balance the pressure difference between the calibration gas and the measurement gas, which improves the Accuracy of measurement results. The invention can be used for the measurement of resting energy consumption of the human body, and has the advantages of comfort, safety and high measurement accuracy.

Description

technical field [0001] The invention relates to the field of gas sample collection and analysis, in particular to a hood-type indirect energy testing method and device. Background technique [0002] The gas metabolism analysis instrument calculates the energy consumption of the human body by testing the amount of oxygen consumption and carbon dioxide production within a certain period of time, as well as the composition of the three major nutrients (carbohydrates, fats and proteins) in energy consumption, and is used for the evaluation of nutritional metabolism. In addition, the device can also be used in conjunction with load equipment such as treadmills and power carts to test the oxygen uptake and carbon dioxide output of the human body under different exercise loads, which can be used to evaluate human cardiopulmonary endurance tests and non-invasive diagnosis of cardiopulmonary circulatory system diseases. Therefore, gas metabolism testing has important application valu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/083
CPCA61B5/083A61B5/0833A61B5/0836
Inventor 王远汪锡张弦高理升张文杰何子军曹庆庆许金林孙怡宁马祖长陈焱焱周旭杨先军
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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