Social News
Written by: Zheng Cuibi, Zeng Aihao
2020-04-25 07:00
Last update date: 2020-04-25 07:00The new coronavirus pneumonia epidemic continues. Among the protective equipment of public hospitals, N95 masks are the most in short supply. The latest stock is 2.3 million, which is 100,000 fewer than last week. The Hospital Authority has studied six major open source and throttling methods, including disinfecting N95 for reuse, researching reusable respirators such as "pig muzzle", and introducing other masks that meet international standards, including a nano mask produced by a local manufacturer in Hong Kong.
According to the HA, the nano mask meets EU standards and is suitable for the prevention of airborne diseases. It can also be used in nebulized medical procedures. It can be purchased at the end of this month as soon as 40,000, and hundreds of thousands of monthly supplies are expected in the future.
According to Zhuang Huimin, this nano-mask meets EU standards and is suitable for the prevention of airborne diseases. It can also be used in nebulized medical procedures. The fastest can be purchased at the end of this month. (Photo by Gao Zhongming)
Innovation and Technology Bureau develops local manufacturers to produce nano masks
Dr. Zhuang Huimin, Chief Administrative Manager (Infection and Emergency Affairs) of the HA, said that the HA will introduce a nano-mask, which was developed by the Innovation and Technology Bureau and was developed by the local manufacturer "Profit Royal Pharmaceutical Limited" ) "Production, the brand is" NASK Mask ", the plant is located in Hong Kong. The mask uses nanotechnology and conforms to the EU FFP2R standard, that is, when using 95 liters of air per minute for testing, its ability to filter sodium chloride aerosol particles above 0.3 microns exceeds 98%.
As for the N95 commonly used in public hospitals, it meets the US standard, that is, when using 85 liters of air per minute for testing, its ability to filter the same particles is higher than 95%.
This nano mask was developed by the Innovation and Technology Bureau and handed over to a local manufacturer for mass production. The plant is also located in Hong Kong. (Photo by Gao Zhongming)
Zhuang Huimin said that the nano masks are waterproof and can prevent droplet cores smaller than 5 microns, which can prevent airborne diseases such as chickenpox and measles, and can also be used for aerosolized medical procedures, including emergency throat insertion and bronchial examination.
This nano mask was developed by the Innovation and Technology Bureau and handed over to a local manufacturer for mass production. The plant is also located in Hong Kong. (Photo by Gao Zhongming)
High air permeability is not cramped
Earlier, the HA performed a face fit test on 160 employees for nano masks to find out if there were any air leaks. About 90% of the employees passed the test. Others may not be able to use it due to problems such as too large a face. Need to use other styles.
Zhuang Huimin said that most of the employees who participated in the test commented that the nano masks were softer in texture, "I do n’t think I can do anything!" Liang Jiafu, a registered nurse in a public hospital, said that this nano mask is lighter and more close-fitting. , "Well, it's cramped and has high air permeability. Compared to the N95, wearing a lazy array is not a trick, it's simple."
Ji future month for the Hospital Authority 100,000 less expensive than N95
Zhuang Huimin pointed out that the manufacturer will supply another 3,000 mask samples this week, which will allow more medical staff to try on them, and the HA will collect employee opinions. The first batch of nano masks purchased by the HA from manufacturers is 40,000, and they will be picked up at the end of April and the beginning of May. In the future, we hope to have hundreds of thousands of supplies each month. She continued to point out that the choice of this style is due to a relatively stable supply, "manufacturers have sufficient machines and manpower and can produce in large quantities, but the raw material melt-blown cloth (supply) is tight. If there is (goods), it will give priority to doctors Authority. "
She did not want to disclose the price of the nano mask, but said that it was "more expensive" than the original N95. Even if the epidemic passed in the future, she hoped to reduce her dependence on foreign imports or continue to order from manufacturers.
There is a shortage of N95 masks. The latest stock is 2.3 million, 100,000 fewer than last week. The Hospital Authority is studying the six major open source and cost-saving methods. (Photo by Gao Zhongming)
Try non-medical N95 plus full face mask not for atomization procedure
I was asked that it would take several months for the N95 fit test to be queued up for medical care. How will it be arranged this time? Zhuang Huimin said that priority will be given to those who work in isolation wards and need to do atomization procedures to do fit test. At present, there are nearly 50 tightness testing instruments in the Bureau, which I believe can help improve the situation.
In addition to nano masks, the HA also uses other masks that meet international standards, including a mask called Alpha Pro Tech, and is also studying KN95 that meets mainland standards. Another open source method is to use "non-medical N95 plus full face mask". Zhuang Huimin explained that non-medical N95 can also filter to 0.5 micron particles, but it is not waterproof, so a full face mask is needed when using it, and it is only suitable for dispensing medicine and blood pressure for the diagnosed. I do n’t recommend any procedures. "
The HA is also investigating the feasibility of using a comprehensive "pig muzzle" and "power filter respirator", but first of all it is necessary to study how to use a general method of disinfecting surgical instruments to thermally disinfect the masks. (Photo by Gao Zhongming)
Pig's mouth can be anti-virus, but to study the disinfection method
Some public hospitals used half-face replaceable respirators and masks commonly known as "pigs" in the wards earlier. Zhuang Huimin said that although "pigs" filter cotton is not waterproof, it is anti-virus. The HA is also studying the use of The feasibility of "pig nozzle" and "power filter respirator" is comprehensive, but first of all, it is necessary to study how to thermally sterilize the mask through the method generally used as a sterilizing surgical instrument.
Zhuang Huimin said that the HA has also tested the disinfection of N95 with hydrogen peroxide atomization. "Fit test after the test, no modification" will not affect the effectiveness of the mask, but it is still not in clinical use at this stage. (Photo by Gao Zhongming)
Hydrogen peroxide disinfection N95 has no effect on efficacy and has not been used clinically
As for throttling, Zhuang Huimin said that in addition to calling for medical care to use cautiously and implementing "extended use", the HA also tested the disinfection of N95 with hydrogen peroxide atomization, "fit test after the test, no modification", she said research It was found that disinfecting N95 does not affect the effectiveness of the mask, but it is still not in clinical use at this stage.
N95 inventory is available for more than two months
Zhuang Huimin said that the latest N95 stock is 2.3 million, which can be used for more than two months. She did not want to disclose the amount of use by the HA, but said that it was very floating. Due to the tight supply of N95, "the time of the next batch is not mentioned," the HA will continue to study the feasibility of different options.
New Coronary Pneumonia ｜ The HKTB refers to mainland tourists tending to compete in areas with low health risks after the epidemic
New crown pneumonia | Hong Kong people staying in India for the past two months: no ticket back before July
New Coronary Pneumonia│Pharmaceutical Service Fund will send medicine to the home next month to help the chronically ill patients get medicine
[New Coronary Pneumonia] More than 2,000 Hong Kong people stranded in Mahan, India: Hong Kong government has not yet provided assistance
▼ Limited polymerization will extend the upgrade ▼
+12
+11
+10
New Crown Pneumonia New Crown Pneumonia 01 Video I Home