A Seven Months Prospective Study of the Respiratory Effects of Exposure to Ash from Popocatepetl Volcano, Mexico
A Seven Months Prospective Study of the Respiratory Effects of Exposure to Ash from Popocatepetl Volcano, Mexico
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墨西哥波波卡特佩特尔火山灰暴露对呼吸系统影响的为期七个月的前瞻性研究
DOI：
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
J. Perez
中科院分区：
文献类型：
--
作者：
M. Rojas;M. Catalán;A. Pozzo;E. Garcia;J. Villalba;J. Perez
本文描述了在1994年最后一周和1995年第一周发生的墨西哥中部Popocatepetl火山的一系列小爆发以及1995年4月之前的几次小爆发期间，35名不吸烟的农民暴露于火山灰悬浮颗粒7个月的随访情况。人们担心火山灰可能对气道产生影响。在基线和暴露后7个月记录肺量测定参数和呼吸道症状。肺活量测定数据分析显示，在主要暴露期间，第一秒用力肺活量（FVC）和用力呼气量（FEV1）显著降低。这一发现可能与急性暴露有关，因为7个月后，FVC和FEV1增加到正常预测值。自我报告的呼吸道和眼部症状也表现出类似的模式。这些发现与短时间接触火山灰与呼吸道可逆炎症有关的假设是一致的。Popocatepetl灰分的可逆性可以解释为灰分总量小，并且由于游离二氧化硅的含量小于3.5%，因此灰分的非纤维性。
This paper describes the 7 month follow-up of 35 non-smoker farmers exposed to suspended particles of volcanic ash of Popocatepetl volcano in central Mexico during a series of small explosive eruptions which occurred the last week of 1994 and the first week of 1995 as well as several smaller eruptions until April 1995. There was concern about the effect that the ash might have on the airways. Spirometric parameters and respiratory symptoms were recorded at the baseline and 7 months after the exposure. Analysis of spirometric data showed a significant low forced vital capacity (FVC) and forced expiratory volume in the first second (FEV1) that occurred during the major exposure period. This finding was possibly acute exposure-related because 7 months later, FVC and FEV1 increased to the normal predicted values. Self-reported respiratory and ocular symptoms showed a similar pattern. These findings are consistent with the hypothesis that short exposure to volcanic ash is associated with reversible inflammation of the airways. The reversibility was explained by the small total ash volume as well as by the non-fibrogenic nature of the Popocatepetl ash, because the content of free silica was less than 3.5%.
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发表时间：
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