EXTERNAL INSPIRATORY RESISTANCE OF PROTECTIVE RESPIRATORY DEVICES - EFFECTS ON PHYSICAL PERFORMANCE AND RESPIRATORY-FUNCTION
EXTERNAL INSPIRATORY RESISTANCE OF PROTECTIVE RESPIRATORY DEVICES - EFFECTS ON PHYSICAL PERFORMANCE AND RESPIRATORY-FUNCTION
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DOI：
10.1002/ajim.4700040606
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发表时间：
1983-01-01
影响因子：
3.5
通讯作者：
KEREN, G
中科院分区：
文献类型：
--
作者：
LERMAN, Y;SHEFER, A;KEREN, G
研究对象 (20) 戴着防护呼吸器，在跑步机上进行次最大运动（.ovrhdot.VO2 max 的 80%）。防护装置配备有低呼气阻力和不同吸气阻力的罐式过滤器：(0.3、1.8、2.8、3.4、3.9和4.6cm H2O×s/l)。研究了吸气阻力对身体耐力、各种生理参数和主观感觉的影响。随着吸气阻力的增加，身体机能显着下降，潮气量减少，吸气与呼气时间比增加，吸气峰值压力增加，CO2 潴留增加。吸气困难与吸气阻力显着相关，并且似乎是停止努力的主要原因。没有发现罐式过滤器的吸气阻力可接受的上限。面罩过滤器吸气阻力的任何降低都会增强耐用性和性能。
Subjects (20) wearing protective respirators were studied during submaximal exercise (80% of .ovrhdot.VO2 max) on a treadmill. The protective devices were fitted with canister filters of low expiratory resistance and different inspiratory resistances: (0.3, 1.8, 2.8, 3.4, 3.9 and 4.6 cm H2O .times. s/l). The effect of inspiratory resistance on physical endurance, various physiological parameters and subjective sensations was examined. With the increase in inspiratory resistance, a significant decrease in physical performance, decrease in tidal volume, increased ratio of inspiratory to expiratory time, increased peak inspiratory pressure and increased CO2 retention were observed. The difficulty in inspiration correlated significantly to inspiratory resistance and seemed to be the main reason for cessation of the effort. No acceptable upper limit for the inspiratory resistance of the canister filters was found. Any decrease in the inspiratory resistance of the mask''s filter enhanced endurance and performance.