A T Johnson, W H Scott, C G Lausted, M B Benjamin, K M Coyne, M S Sahota, M M Johnson
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引用次数: 45
Abstract
Respirator inspiratory resistance can affect performance times, especially when the experiment is optimized to elicit respiratory stress. Twelve subjects performed on a treadmill at constant speeds and grades chosen to result in performance times of 5-15 min. Six levels of inspiratory resistance were used, ranging from 0.78 to 7.64 cm H2O.sec/L. The results showed that performance times decrease linearly with resistance level, and no threshold resistance value is apparent. Inspiratory resistance also induces hypoventilation, with lower minute volumes and lower oxygen consumption values at higher resistances. These trends are also linear. From these results, there is no value for inspiratory resistance that can be given as a design goal. Other parameters such as weight and space may dictate filter resistance values, and these, in turn, will lead to determined performance degradations.
呼吸器吸气阻力会影响实验时间，特别是当实验被优化以引起呼吸压力时。12名受试者在跑步机上以恒定的速度和等级进行运动，运动时间为5-15分钟。使用6个水平的吸气阻力，范围为0.78至7.64 cm H2O.sec/L。结果表明，性能次数随电阻水平线性降低，且无明显的阈值。吸气阻力也会导致低通气，当吸气阻力越大时，分气量越小，耗氧量越低。这些趋势也是线性的。从这些结果来看，吸气阻力没有价值，可以作为设计目标。重量和空间等其他参数可能会决定过滤器的阻值，而这些又会导致确定的性能下降。
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