a - m系统公司提供适合多种用途的口罩，包括麻醉、呼吸和复苏应用。它们有几种尺寸可供选择，以满足大多数患者的需求。每个面具都是由高质量的材料和特性一个软垫,海豹轻轻病人的脸,微微抬起鼻子周围的面板为患者提供更高程度的安慰和更高程度的间隙,以确保良好的病人之间的密封和面具。每个面罩上的端口都被设计为与呼吸电路的其他组件提供一个安全且防泄漏的连接。
The ViroMax Viral-Bacterial Filter was tested at Nelson Laboratories at an increased challenge level that included a higher viral concentration and aerosolized particles that are smaller than the upper range (≤5 µm) of what the CDC generally defines as droplet nuclei 1 or infectious aerosols 2.
The virus used in these tests is the φX174, a spherical, icosahedral bacteriophage with 5,386 nucleotides and 27 nm (0.027 µm) in size. The challenge liquid was nebulized and then aerosolized in order to mimic aerosols and respiratory droplets. The mean particle size of these aerosols in the tests was 2.8 µm.
Each challenge in these reproducible tests consisted of 1.6 x 106 plaque-forming units or more. And the plates were incubated at body temperature for 12 to 24 hours.
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