Raven P B, Jackson A W, Page K, Moss R F, Bradley O, Skaggs B
Am Ind Hyg Assoc J. 1981 Apr;42(4):247-57. doi: 10.1080/15298668191419686.
This investigation determined the cardiorespiratory responses of subjects with normal lung function and exercise tolerance and compared them with subjects with moderate and severe impairment of lung function and exercise tolerance. Comparisons were made during work while wearing an industrial respirator. The respirator was a full-face mask (MSA-ultravue) "demand" breathing type equipped with an inspiratory resistance of 85 mm H2O at 85 L/min air flow and an expiratory resistance of 25 mm H2O at 85 L/min air flow. Physiologically and subjectively the response of the normal and moderately impaired subjects to respirator wear during rest, 35%, 50% and 63% of their maximal workloads were not different. However, when the moderately impaired worked at 63% of their maximum the workload was equivalent to 50% of maximum of the normal subject. Significant differences in the peak flow/pressure ratio of the severely impaired compared to the normals and moderately impaired were found. By relating work performance to the dyspnea index (VI/MBC) it was suggested that the relationship between maximal lung function and maximal work performance needs to be identified both with and without respirators. This relationship may prove suitable in predicting performance during respirator wear.
本研究测定了肺功能和运动耐量正常的受试者的心肺反应，并将其与肺功能和运动耐量中度及重度受损的受试者进行比较。在佩戴工业呼吸器工作期间进行了比较。该呼吸器为全面罩（MSA-ultravue）“按需”呼吸型，在85升/分钟气流时吸气阻力为85毫米水柱，呼气阻力为25毫米水柱。在生理和主观方面，正常受试者和中度受损受试者在休息、35%、50%和63%最大工作量时佩戴呼吸器的反应并无差异。然而，当中度受损者以其最大量的63%工作时，该工作量相当于正常受试者最大量的50%。发现重度受损者与正常受试者和中度受损者相比，其峰值流量/压力比存在显著差异。通过将工作表现与呼吸困难指数（VI/MBC）相关联，表明需要确定在佩戴和不佩戴呼吸器两种情况下最大肺功能与最大工作表现之间的关系。这种关系可能适用于预测佩戴呼吸器期间的表现。
