[Investigation of the Filter Performance in a Sample of Standardised Particle-filtering Half Masks]. / Stichprobenuntersuchung der Filterleistung von normierten partikelfilternden Halbmasken.
Pneumologie
; 75(3): 206-213, 2021 Mar.
Article
em De
| MEDLINE
| ID: mdl-33494114
ABSTRACT
BACKGROUND:
Thanks to a simplified special approval process that was valid until October 1st, 2020, a large number of particle-filtering half masks have come onto the German market. When caring for SARS-CoV-2 infected patients, the RKI recommends wearing particle-filtering half masks with a filter performance of at least 94â%, which corresponds to FFP class 2 according to EN 1492001+A12009. We have examined 15 particle-filtering half masks with different specifications for their filter performanceMETHOD:
The masks were clamped in a jig in an airtight test box. Radioactive particles with a size of 0.6â±â0.4âµm were nebulized into the box and sucked into a filter through the port of the jig and an unfiltered reference port using an artificial lung. The activity deposited on the filter was measured by means of a gamma camera. The filter performance was calculated from this.RESULTS:
Five of the 15 masks tested had a filter performance of less than 94â% and therefore do not meet the FFP2 standard. The filter performance of these masks was 71.8â±â2.3â%, 73.2â±â2.3â%, 78.2â±â6.7â%, 92.2â±â0.5â% and 85.9â±â1.6â%.CONCLUSION:
One third of the examined masks did not meet the recommended FFP2 standard, which is recommended for the care of SARS-CoV-2 infected patients. A comprehensive review of already approved products by the supervisory authorities is advisable.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Dispositivos de Proteção Respiratória
/
Exposição Ocupacional
/
COVID-19
Limite:
Humans
Idioma:
De
Ano de publicação:
2021
Tipo de documento:
Article