Disposable Medical Surgical Masks:

Mar 13, 2020

Disposable medical surgical masks:

Disposable surgical masks are more suitable for the protection of blood, body fluids and splashes during invasive operations. They are mainly used for basic protection of medical personnel and related personnel in medical institutions. General doctors' surgery and infectious diseases ward medical staff You need to wear this mask.

Main features: It is used to prevent blood, body fluids and splashes during invasive operations, and to prevent droplet-borne respiratory diseases. It can block infectious factors (bacteria, viruses and other pathogenic microorganisms with a diameter of less than 5 microns). Wait).

KN95 mask: certified by NIOSH in the United States, non-oily particulate filtering efficiency is about 95%.

KKN95 mask: meets China's GB 2626 mandatory standard, non-oily particulate matter filtration efficiency ≥95%.

But what we need to know is that "the core standards of industrial masks and consumer masks are actually the same. According to GB2626 standard KKN95, KN90 is actually sufficient. Medical personnel will have body fluid splashes and high environmental concentrations. Only need to be strict.

However, it should be noted that although some star masks are more beautiful, they do not care about the protection effect. "The 3M technical staff mentioned to the 21st Century Business Herald reporter.

Regarding the frequency of changing masks, the above-mentioned technicians said that they started to change when they became dirty, ranging from three to five days, or when medical staff went to the contaminated area, they needed to be replaced.

In fact, regarding the issue of replacement frequency, at present, there are no clear conclusions about the wearing time of KN95 masks by foreign countries including WHO, and China has not made relevant regulations on the use time of masks.

Relevant researchers have done research on the protective efficiency and wearing time of KN95 medical protective masks. According to the relevant results data, KN95 masks can still maintain a filtration efficiency of more than 95% when worn for 2 days, and the change in respiratory resistance does not change. Large; filter efficiency reduced to about 94.7% after 3 days of wearing.