Impact of low filter resistances on subjective and physiological responses to filtering facepiece respirators.
Impact of low filter resistances on subjective and physiological responses to filtering facepiece respirators.
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DOI：
10.1371/journal.pone.0084901
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Sebastian JM
中科院分区：
文献类型：
--
作者：
Roberge RJ;Kim JH;Powell JB;Shaffer RE;Ylitalo CM;Sebastian JM
10名受试者以5.6 km/h的速度进行了1小时以上的跑步机运动，同时佩戴三种外观相同的杯形原型过滤面罩呼吸器，这些呼吸器仅在过滤器阻力（3 mm、6 mm和9 mm H2O压降）方面有所不同。在对生理参数的影响方面，过滤面罩呼吸器之间没有统计学显著差异（即，心率、呼吸率、氧饱和度、经皮二氧化碳水平、鼓膜温度），肺功能变量（即，潮气量、呼吸率、二氧化碳产生量、耗氧量或通气量），和主观评级（即，用力、热舒适度、吸气努力、呼气努力和总体呼吸舒适度）。原型过滤面罩呼吸器的标称过滤器阻力对应于范围为2.1 - 6.6 mm H2O/L/s的气流阻力，其小于或最小等于先前报道的用于检测吸气呼吸阻力的正常阈值的值（6 - 7.6 mm H2O/L/s）。因此，在低-中等工作速率下超过一小时，具有等于或低于该水平的过滤器阻力的过滤面罩呼吸器可能不会在生理上或主观上与具有仅略高于该阈值的过滤器阻力的过滤面罩呼吸器不同地影响佩戴者。
Ten subjects underwent treadmill exercise at 5.6 km/h over one hour while wearing each of three identical appearing, cup-shaped, prototype filtering facepiece respirators that differed only in their filter resistances (3 mm, 6 mm, and 9 mm H2O pressure drop). There were no statistically significant differences between filtering facepiece respirators with respect to impact on physiological parameters (i.e., heart rate, respiratory rate, oxygen saturation, transcutaneous carbon dioxide levels, tympanic membrane temperature), pulmonary function variables (i.e., tidal volume, respiratory rate, volume of carbon dioxide production, oxygen consumption, or ventilation), and subjective ratings (i.e., exertion, thermal comfort, inspiratory effort, expiratory effort and overall breathing comfort). The nominal filter resistances of the prototype filtering facepiece respirators correspond to airflow resistances ranging from 2.1 - 6.6 mm H2O/L/s which are less than, or minimally equivalent to, previously reported values for the normal threshold for detection of inspiratory breathing resistance (6 - 7.6 mm H2O/L/sec). Therefore, filtering facepiece respirators with filter resistances at, or below, this level may not impact the wearer differently physiologically or subjectively from those with filter resistances only slightly above this threshold at low-moderate work rates over one hour.
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DOI：
10.1016/0034-5687(85)90130-6
发表时间：
1985-01-01
期刊：
RESPIRATION PHYSIOLOGY
影响因子：
--
作者：
MAXWELL, DL;COVER, D;HUGHES, JMB
通讯作者：
HUGHES, JMB
影响因子：
2.5
作者：
Kim, J. -H.;Roberge, R.;Williams, W. Jon
通讯作者：
Williams, W. Jon
影响因子：
15.9
作者：
DUBOIS, AB;BOTELHO, SY;COMROE, JH
通讯作者：
COMROE, JH
DOI：
10.1097/00043764-198908000-00014
发表时间：
1989-08-01
影响因子：
3.2
作者：
HARBER, P;SHIMOZAKI, S;LOISIDES, P
通讯作者：
LOISIDES, P
影响因子：
3.5
作者：
LERMAN, Y;SHEFER, A;KEREN, G
通讯作者：
KEREN, G