The armor of the “retrograde” anti-epidemic! Why are negative pressure ambulances so important?

There is no winter that is insurmountable, and there is no spring that will not come. Under the epidemic, we have not only witnessed China's speed again, but also seen the responsibility and strength of car companies. I believe it won’t be long before we can take off our masks and roam freely on the streets of spring.

Text/Crayon New Picture/Source Network

Under the cloud supervision of millions of netizens, Huoshenshan Hospital once again demonstrated the speed of China. It was officially completed after only 10 days of hard work day and night. deliver.

This morning, ambulances carrying novel coronavirus-infected pneumonia patients transferred from Wuchang Hospital, Hankou Hospital and other hospitals arrived at Huoshenshan Hospital. This is the first batch of patients admitted by Huoshenshan Hospital. It is worth noting that the ten emergency ambulances performing this transfer task are all negative pressure ambulances.

Why should we emphasize negative pressure ambulances? Previously, the Ministry of Industry and Information Technology issued a notice on New Year's Eve, requiring some light passenger car manufacturers to speed up the production of negative pressure ambulances for the epidemic and supply them to key areas to ensure medical safety. What is the difference between this kind of ambulance and ordinary ambulance? Why has it become a necessary material to respond to the epidemic? Let’s find out next.

What is a negative pressure ambulance?

First of all, let’s solve the problem of what a negative pressure ambulance is.

The new coronavirus that caused this epidemic can spread at short distances through droplet transmission, contact transmission and respiratory aerosol transmission, causing pneumonia in humans and endangering health, and air is its main transmission medium. . In this way, there is a hidden risk of virus leakage during the transportation and transfer of patients through ambulances. Once the virus is leaked, more people will be exposed to danger and the risk of infection will increase.

In the face of the new coronavirus, the role of conventional ambulances is really limited. Professional negative pressure ambulances are needed to complete the safe isolation and transportation of patients with major infectious diseases. Therefore, the biggest difference between the so-called negative pressure ambulance and ordinary ambulances is that it can achieve "negative pressure isolation", which makes the air pressure in the cabin lower than the outside atmospheric pressure, effectively diverts the wind direction, and circulates the air in the cabin at all times, maximizing Ensure the safety of doctors and patients to a certain extent.

Negative pressure ambulances mainly achieve "negative pressure isolation" through a unique negative pressure medical cabin. They use air conditioners and fans to adopt the principle of fluid mechanics to form a clean area in the vehicle (i.e., the passengers inside the vehicle). The medical staff area with a high profile), the directional airflow to the infection source area (that is, the patient area lying on the stretcher), and finally, the gas in the car will be sterilized through the filter and then discharged outside the car to become pollution-free air.

Since the medical cabin in the vehicle forms a negative pressure that is 10-30 Pa lower than the external atmospheric pressure, the air exhaled by the patient will not be discharged out of the vehicle through the gaps in the vehicle doors and windows, which can effectively prevent viruses from infecting the environment along the way. According to national standards, the fans in the negative pressure warehouse will need to completely replace the air 20 times per hour; the system cannot exceed 3 minutes from startup to the formation of the standard negative pressure value. In addition, national standards also put forward corresponding requirements for the sterilization ability of negative pressure ambulance filters.

In addition, the negative pressure ambulance also needs to be equipped with a full set of rescue equipment such as a ventilator, defibrillator, and ECG monitor that are common in ambulances, and is equipped with ultraviolet disinfection lamps and central oxygen supply. It carries medical equipment such as interfaces, as well as many items such as epinephrine and other commonly used drugs and cleaning and disinfection equipment. Therefore, compared with ordinary ambulances, the manufacturing difficulty and cost are greatly improved.

Why not produce negative pressure ambulances earlier?

I believe that after reading the above explanation, you can understand the huge role that negative pressure ambulances can play in responding to this epidemic, but you can’t help but ask, why didn’t you prepare this kind of negative pressure ambulance earlier? What about rush production now?

With the same question, we reviewed relevant information and consulted relevant personnel, and found that the biggest reason was the cost of negative pressure ambulances. We also mentioned above that the manufacturing difficulty and cost of negative pressure ambulances are much higher than that of ordinary ambulances. The current cost of a single vehicle is generally more than 350,000 yuan. Because of this, no country in the world uses negative pressure ambulances for routine tasks.

At the same time, ordinary ambulances are fully capable of rescuing ordinary patients. In addition, under normal circumstances, hospitals will not receive a large number of critically ill patients or high-risk infectious disease patients in a short period of time, so they will not We reserve many such high-configuration negative pressure ambulances. Therefore, the new coronavirus is approaching fiercely, and the number of infected patients has surged, resulting in a large number gap in Wuhan.

But don’t worry. After receiving the task of producing negative pressure ambulances from the Ministry of Industry and Information Technology on January 25, several domestic companies capable of producing negative pressure ambulances responded quickly and worked overtime. Negative pressure ambulances are rushed to be produced, and thousands of negative pressure ambulances are about to reinforce the front line of the fight against the epidemic.

Witness the power of the industry and pay tribute to the car people

After the outbreak, as the mainstay of China's manufacturing industry, automobile companies have successively contributed to the fight against the epidemic. After the Ministry of Industry and Information Technology issued the emergency task, the automobile industry responded to the national call one after another, giving up their original rest time and working overtime to meet the construction deadline to ensure that products were delivered within one-third of the regular construction period.

You must know that the normal production of a negative pressure ambulance requires two steps: base vehicle production and modification. According to the conventional steps, the production of a base vehicle generally takes 2 weeks, while the modification of a negative pressure ambulance requires multiple steps such as foam insulation, wiring, interior installation, electrical, medical equipment installation, and negative pressure facility installation. It took 2 weeks, and the total construction period was 30 days. Now it is very difficult to complete it in 10 days.

Faced with such a huge challenge, many domestic companies have accepted the challenge and risen to the challenge. All employees involved in the production of negative pressure ambulances at various car companies gave up their vacations and time to reunite with their families, and returned to the factory to devote themselves wholeheartedly to the production of negative pressure ambulances.

The following is the production progress of some car companies that we have counted so far:

SAIC MAXUS: SAIC MAXUS received a "special order from the Ministry of Industry and Information Technology on New Year's Eve, January 24. ". In order to actively respond to the government's call and requirements to fight the epidemic, SAIC MAXUS ensured the production of 60 negative pressure ambulances from January 24 to February 5, 2020, giving priority to key areas.

Lu Zhiming, executive deputy general manager of SAIC Maxus Wuxi Shenlian Special Purpose Vehicle Co., Ltd., said in an interview that the factory received production tasks on New Year’s Eve, held an emergency meeting that day and notified employees one-on-one. All employees who received the notice to resume work responded very quickly. Dozens of employees arrived at the production line on the first day of the new year alone.

Beiqi Foton: On the afternoon of January 26, the negative pressure ambulance produced by Beiqi Foton after the outbreak of the epidemic was followed by Beijing Hospital, Peking Union Medical College Hospital, China-Japan Friendship Hospital, Peking University Hospital, and Peking University People's Hospital A super-strong medical team formed by the hospital and six hospitals of Peking University Third Hospital officially went to Wuhan to fight on the front line of epidemic prevention together with the medical rescue personnel ***.

Fujian Benz: On January 25, Fujian Benz Modification Factory received a notice from relevant national departments to produce a batch of negative pressure ambulances to reinforce the front line in the fight against the new coronavirus pneumonia. BAIC Group is rushing to support epidemic prevention and control. Late at night on January 26, with the cooperation of multiple departments of Fujian Benz, 20 Vito negative pressure ambulance basic vehicles were completed and shipped to Beijing and Zhejiang overnight.

Chery River: On January 24, Chery Holding Group received an order from the Ministry of Industry and Information Technology to produce the first batch of 20 negative pressure ambulances. Chery River's production line is at full power. The production task of the first batch of 20 vehicles is guaranteed to be completed before February 5. At that time, the first batch of negative pressure ambulance vehicles will quickly rush to Wuhan to provide strong support for the fight against the epidemic, and subsequent batches of negative pressure ambulance orders are also being actively coordinated. Resources are being intensively allocated.

Brilliance Auto: On January 24, Brilliance Group received an order from the Ministry of Industry and Information Technology to produce the first batch of 30 negative pressure ambulances. Brilliance Automobile Group issued an emergency mobilization order. Frontline employees of its Dalian Special Purpose Vehicle, Brilliance Renault Jinbei, Shenhua Special Purpose Vehicle, Shenbei Special Purpose Vehicle and other companies that produce medical special vehicles have ended their vacations and urgently prepared to produce ambulances and other medical professional vehicles. , fully supporting epidemic prevention and rescue work in various places.

JMC: On January 26, JMC received orders for over 1,000 ambulances, including 200 negative pressure ambulances. Faced with the huge market demand for ambulances, JMC factory employees are working hard to Wearing a mask, working overtime and going all out. As of February 3, 20 Ford Transit negative pressure ambulances that Jiangling has rushed to produce have been sent to Wuhan, and 10 of them will be donated free of charge to the front line of Wuhan's fight against the epidemic.

Zhengzhou Yutong: On January 25, Yutong received a task from the Ministry of Industry and Information Technology, requiring it to urgently produce 55 negative pressure ambulances with guaranteed quality and quantity before February 5 to reinforce the front line of the country’s fight against the epidemic. . Yutong quickly set up an epidemic emergency team. During the Spring Festival, the emergency team worked around the clock to prepare emergency product plans. The product production lines were operating normally and fully supported the epidemic prevention work in various places...

17 years ago, the SARS epidemic broke out It took more than a month for domestic negative pressure ambulances to come on the market. However, during the Wuhan novel coronavirus outbreak, although it was during the Spring Festival holiday, it only took us a week to see domestic negative pressure ambulances rushing onto the market. On the front line, this is the epitome of the great progress of our country's automobile industry in recent years, and it is also a manifestation of the strength of the national industrial system.

Facing the severe epidemic prevention situation, companies in the automotive industry have taken multiple measures and actively extended a helping hand. According to incomplete statistics, in order to fight against the new coronavirus, the automobile industry has donated more than 800 million yuan in donations, and there are countless car people behind it who are silently contributing their part.

Under the epidemic, we not only witnessed China’s speed again, but also saw the responsibility and strength of car companies. There is no winter that is insurmountable, and there is no spring that will not come. I believe it won’t be long before we can take off our masks and roam freely on the streets of spring.

This article comes from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.