With Wuhan Vulcan Mountain, Lei Shenshan two new coronary pneumonia designated hospitals in recent days put into use, the next time there will be a number of patients will be transferred to the new hospital for treatment. In order to avoid cross-infection during the transfer process, the usually little-known negative pressure ambulance came in handy.
What is a negative pressure ambulance?
According to the "Pneumonia Diagnosis and Treatment Program for New Coronavirus Infections (Trial Version 4)" issued by the National Health Commission, respiratory droplet infection is the main transmission route of the epidemic. And in the narrow space of an ambulance, the risk of virus transmission naturally increases dramatically. At the same time in the transfer process, there is also the same risk of virus leakage to the environment along the way. So the negative-pressure ambulance is meant to completely cut off all kinds of transmission possibilities during the transfer process.
As the name suggests, the biggest difference between a negative-pressure ambulance and an ordinary ambulance is the addition of a negative-pressure function. Through the work of the negative pressure generator, you can keep the pressure inside the car is always lower than the external atmospheric pressure. I remember from my junior high school physics textbook that gases flow from the place of high pressure to the place of low pressure, which makes the air inside the car will not flow out through the windows and doors and other gaps, effectively preventing the spread of the virus.
For the car, the air conditioning and fan using the principle of fluid dynamics, the formation of top-down directional airflow in the car, the airflow will first flow through the higher sitting position of the health care workers, and then flow through the flat lying in the lower part of the patient, and ultimately, the gas in the car will be sterilized through the filter discharged out of the car, will not be into the car re-circulation, to fully guarantee the safety of health care workers and the outside world in the car.
If it is to deal with more infectious diseases, negative pressure ambulances can also be equipped with the optional negative pressure isolation compartment with more stringent protection measures, so that the patient's respiration can be completely isolated from the rest of the occupants of the vehicle, avoiding the possibility of cross-infection.
Besides the hardware differences, what else makes a negative-pressure ambulance different?
The first and biggest difference is price. Because the negative pressure ambulance increased negative pressure equipment and isolation chamber, even the relatively inexpensive Chinese brand, the offer is basically more than 300,000 yuan, compared with the same brand of ordinary ambulance at least 100,000 yuan more expensive.
Of course, the difference in price is not only due to the additional equipment. Negative pressure ambulance is able to realize negative pressure, the most basic premise is to ensure that the car is absolutely airtight, which is the car's assembly process and the level of materials has extremely stringent requirements, said it is the quality control requirements than the luxury brand passenger cars are also high is not too much.
Another major difference is the production process. Compared with traditional passenger cars that can be delivered to end-users off the line from the OEM, commercial vehicles, including ambulances, need to be customized on the basis of the base vehicle, such as negative pressure ambulances need to be modified through the foam insulation treatment, wiring, interior installation, electrical, medical equipment installation, negative pressure facilities installation and other steps, which makes the production cycle increase dramatically.
For example, on New Year's Eve, the company received an urgent assignment to deliver 60 negative-pressure ambulances within 10 days, which means that it can only produce an average of six ambulances per day. It may seem inefficient, but it's actually the fastest speed after the factory worked overtime to reduce the production cycle by two-thirds, which shows the difficulty and complexity of the negative pressure ambulance production work.
Which manufacturers make negative pressure ambulances?
In addition to medical workers fighting on the front lines of the epidemic, motorists are not far behind. Compared with most industries that took a vacation break during the Spring Festival, the automotive industry insisted on working overtime to provide solid protection against the epidemic. Among them, BAIC Foton, Fujian Benz, Jiangling Group, Yutong Group, Brilliance Group, SAIC Datsun, Jiangling Ford, Nanjing Iveco and other domestic first-class commercial vehicle manufacturers have received orders for negative pressure ambulances, most of the negative pressure ambulances have been successfully off the production line and headed to the front line of the relief efforts, playing their due value.
In addition to commercial vehicle enterprises, Qingdao Suoer, Ningbo Kaifule, Zhuhai Pengyu and other mainstream modification, special vehicle companies have also ordered the base car, expedited modification of the negative pressure ambulance. One of the ambulance chassis manufacturer Jiangling Group has received more than 200 chassis orders, the future will have more negative pressure ambulance into the ranks of disaster relief. Although the production of negative pressure ambulance manufacturers, different models, but in order to ensure enough space inside, all models have adopted a high roof models, the internal height of the basic can be guaranteed at about 1.7 meters, ride will not have any depressing feeling.
Shu Jin viewpoint
"Workers who want to do a good job must first make good use of their tools", to win the silent battle against the epidemic, advanced medical equipment is essential. With the negative pressure ambulance has been put into use, will make the front-line health care workers in the work of the tiger with wings, repel the epidemic naturally become just around the corner, Wuhan's cherry blossoms will be in full bloom in the spring of this year, as promised.
This article comes from the author of the automobile home car family number, does not represent the views of the automobile home position.