2001, Number 1
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Rev Inst Nal Enf Resp Mex 2001; 14 (1)
Effects on airway resistance of facial masks to filter polluted air.
Rojas GA, Pérez NJ
Language: Spanish
References: 15
Page: 8-11
PDF size: 152.54 Kb.
ABSTRACT
Introduction: The efficiency to avoid breathing ozone was evaluated with two facial masks: International Centrum Corporation Mask, (ICC) and Greenscreen Antipollution Mask (GA).
Material and methods: Each mask was placed between two chambers; in the first, 0.60 to 0.66 ppm of ozone were generated. Air circulated from the first to the second chamber and ozone was measured in the second contra lateral chamber. Controls were a surgical mask and a disposable handkerchief. Subsequently, the additional resistance produced by the use of the ICC and GA was measured. Specific airway resistance sRaw was measured in thirteen volunteers under three different conditions: without facial mask, with the ICC and with the GA.
Results: The two facial masks, the surgical mask and the disposable handkerchief were equally efficient to eliminate ozone. The masks increased the sRaw substantially; average with no mask was 0.29 kilopascals/sec; with the ICC, 1.05 kilopascals/sec; with the GA, 2.96 kilopascals/sec.
Conclusions: It is recommended to use a disposable handkerchief or surgical mask to filter ozone polluted air because facial masks increase the cost and the sRaw considerably and impose a risk on patients with obstructive respiratory problems.
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