季節的かつ間欠的な高地勤務が健康状態に及ぼす影響

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Health status of 7 men was examined in order to study the effect of duty work cycle of 3-d stay at the altitude of 2,000m and one-day holiday at 600m for a period of 6 months from May to October. Their usual works were desk work and road patrol. Total hemoglobin concentration in blood increased significantly after work at high altitude, which was considered to be a compensatory response to the hypoxic state. Subjective symptoms were obtained by a self-administered questionnaire before (April), during (June and October) and after (November) work at high altitude. Fatigue was observed in three out of the seven subjects in June, which subsequently disappeared in October. Dyspnea was observed also in June in three of the subjects, which disappeared in two, persisted in one, and newly appeared in another subject in November. In contrast, a tendency of favorable effects of the work environment on nausea and lumbago was observed. Blood pressure and pulse rate were measured for 24h. The mean systolic blood pressure during 24h decreased in two of five subjects in October and November, and the mean values during the working hours decreased in two in October from 145 to 131mmHg and from 147 to 129mmHg, respectively. The blood pressure measured at health examination correlated well with the mean blood pressure during 24h and working hours. The mean pulse rate during 24h and working hours increased in one in June, October and November. These results indicate that adaptive responses to low barometric pressure environment developed during a work period of 5 months at high altitude. However, the results also suggested that the working environment may have some effects on health status although not harmful. It was concluded from these results that health management should be made with careful observation of individual subjective symptoms.
社団法人日本産業衛生学会の論文
1992-05-20

季節的かつ間欠的な高地勤務が健康状態に及ぼす影響

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