Since the outbreak of the new crown in early 2020, more than 100 million people have been diagnosed globally and more than 3 million people have lost their lives. The global crisis triggered by COVID-19 has penetrated into all aspects of our medical system. In order to prevent the spread of the new coronavirus to patients, medical staff, equipment and the environment, we mainly rely on two important filtration systems: loop filters and masks when using artificial respiration systems in operating rooms and/or intensive care units (ICU) Respirator.
However, there are many types of breathing filters on the market. When discussing the level of filtration efficiency of different manufacturers, are their standards the same? During the COVID-19 epidemic, how to choose a high-performance breathing filter?
Clinicians should understand the specifications of the respiratory pathway filter. These can be found from the manufacturer's website or hotline, product literature, online and journal articles. Important parameters include:
l Bacteria and virus filtration efficiency (%-the higher the better)
l NaCl or salt filtration efficiency (%-the higher the better)
l Air resistance (pressure drop at a given air velocity (unit: Pa or cmH2O, unit: L/min), the lower the better)
It should be noted that when the filter is under humid conditions, will its previous parameters (for example, filtration efficiency an
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