Vékény H
Pathophysiologisches Institut der Pécser Medizinischen Universität.
Z Gesamte Hyg. 1990 May;36(5):273-5.
Mineral dust originating at deep mining are polydisperse of a broad spectrum. The size of the largest particles is about 50 to 200 microns. At inspiration the particles undergo a selection according to their size: the particles exceeding 200 microns are not inhaled, particles exceeding a size of 15 to 20 microns remain in the tracheobronchial tract (NPL-fraction), granules smaller than 5 to 8 microns will be deposited in the alveolar region (A-fraction).-Selection of dust has been characterized by international conventions, i.e. the A-fraction by BMRC-characteristic. In the case of inert and fibrous mineral dust environment--from the five dust fractions--the A-fraction as the risk factor for pneumoconiosis and the TB-fraction as the risk factor for "dust bronchitis" may have an importance. Therefore concentration of these two fractions has to be systematically measured.--The paper presents a dust gravimeter--new in its structural composition--suitable for measuring concentration of the two fractions simultaneously and separately.
来自深部采矿的矿物粉尘具有多分散性，粒径范围很广。最大颗粒的尺寸约为50至200微米。在吸气时，颗粒会根据其大小进行筛选：超过200微米的颗粒不会被吸入，超过15至20微米的颗粒会留在气管支气管区域（NPL级分），小于5至8微米的颗粒会沉积在肺泡区域（A级分）。粉尘的筛选已由国际公约进行了界定，即A级分采用BMRC特性。在惰性和纤维状矿物粉尘环境中——从五个粉尘级分来看——作为尘肺病风险因素的A级分和作为“粉尘性支气管炎”风险因素的TB级分可能具有重要意义。因此，必须系统地测量这两个级分的浓度。——本文介绍了一种结构组成新颖的粉尘重力计，适用于同时和分别测量这两个级分的浓度。
