Written by Chu Yunwen
Those who like cars will try to experience as many models as possible to satisfy their own preferences and aspirations for this type of machinery.
But when it comes to the ambulance, it is estimated that in anyone's heart, he or she will never want to go for a ride in his or her life, after all, it is not for the healthy people.
If it weren't for the ravages of a new strain of coronavirus pneumonia, I wouldn't have wanted to know how far ambulances have come and how they came to be.
Originally from the war zone
In the old days, when medical care was still limited, and when plague broke out in some areas, people just prayed to the gods and left it to fate.
But there was still the possibility of healing the wounds suffered by humans in war, and the transportation of the wounded and injured and the delivery of first aid supplies became the reason for the birth of the ambulance.
Human intelligence is infinite, it is the horse's facial expression is not very happy
If there is an enemy ahead, this is to transport the wounded? Or is it taking bullets out of the wounded?
The earliest history of the ambulance dates back to the 15th century. Spain at the time debuted the term ambulance in its army, using the tool to transport and move the wounded on the battlefield.
The reason why it is a tool and not a vehicle is that at that time, the "power" was still provided by human or animal, and the "ambulance" itself was in a variety of shapes and sizes. The first is the "ambulance", which is a car that is not a vehicle.
Horse-drawn carriages had their moment in history, and at this point in time, ambulances were also based on horse-drawn carriages. During the Civil War, one wagon would be assigned to every 150 soldiers for field ambulance use.
Possibly the most famous of these was the BELLEVUE?HOSPITAL in New York, USA, in 1869, where horse-drawn carriages bearing the name of the hospital can be seen being used for civilian medical ambulance services.
It wasn't until the 19th century, when machinery replaced traditional and inefficient human labor, that the contemporary ambulance took shape.
After German Karl Benz invented the world's first automobile in 1886, the first gasoline-powered ambulance went into service in Chicago in 1899.
More than just transportation, but also on the way to rescue
With the passage of time, technological advances, people more than hope that the ambulance only shoulder the responsibility of transporting the injured, the sick, because if this is the case, any one of the large space of the car can meet this demand, then trucks can be called an ambulance, cabs can also do this work.
Spyker?Ambulance?1916
Since it's called an ambulance, it's supposed to treat patients as soon as they come into contact with them, which requires an experienced emergency physician and the necessary equipment to maintain vital signs.
The modern ambulance is better described as a mobile mini-hospital, if not a vehicle. Patients with broken limbs are often immobilized with splints and other equipment, and critically ill patients can be monitored for pulse, blood pressure, oxygen and other vital signs by the vehicle's monitoring equipment.
In addition, there are oxygen, defibrillation, painkillers and other equipment that can provide emergency treatment.
At present, ambulances are also divided into more types in order to improve the efficiency of treatment. When a patient calls the emergency number, the other party will be more detailed to understand the patient's situation, and then according to the description of the choice of emergency vehicles, can be broadly divided into emergency rescue, women and children emergency, custody and other types.
In this new coronavirus outbreak, because the virus will be infected through droplets and mucous membranes of the human body, and manifests itself as a respiratory disease, highly contagious, so there is a risk of leakage of the virus in the process of patient admission and transfer.
Ordinary ambulances are not effective in isolating the virus in this regard. So we hear the term-negative pressure ambulance in the news.
What is a negative pressure ambulance?
The term negative-pressure ambulance may not seem that easy to understand.
Simply put, negative pressure is the equivalent of putting a high-specification mask on an ordinary ambulance to prevent viruses from spreading and contaminating the area outside the ambulance.
Shanghai Datsun V80 Negative Pressure Ambulance
Because of the special nature of infectious diseases, in addition to the vehicle needs to supply clean air to the patient, but also need to isolate the patient's exhaled gas and carry germs in the ambulance.
First of all, we need to know that the gas will flow uninterruptedly, the air will flow from the area of high air pressure to the area of low air pressure, and vice versa is not possible to realize unless there is a fan and other air blowing device to force its movement.
Negative pressure systems, as the name implies, have a lower air pressure than standard atmospheric pressure. If you're familiar with racing, you'll have heard the term diffuser, which works by speeding up the airflow flow when the vehicle is traveling at high speeds, allowing the air under the chassis to be pumped out as quickly as possible.
This time, the chassis under the formation of a negative pressure area, can be racing "sucked" to enhance the grip.
Negative-pressure isolation chambers are used in
toxic environments and for the transportation of respiratory infections
Diffusers create a negative-pressure zone through aerodynamics, whereas ambulances create a negative-pressure zone through the negative-pressure system that operates inside the ambulance. Although the working principle is different, the effect achieved is still similar, the same is to make the air inside the vehicle is constantly being pumped out.
The air pressure inside the negative pressure ambulance will be maintained at a level of -30Pa to -20Pa or so, so that the gas mixed with the virus does not spread outward through the vehicle gaps, contamination, but only through the vehicle's well-designed pipeline, by the inactivation equipment.
Producing a negative-pressure ambulance requires modifications to the base vehicle. The production of the base vehicle usually takes two weeks, and the retrofitting process takes the same two weeks to go through the steps of foam insulation treatment, wiring, interior assembly, electrification medical equipment installation, and installation of negative pressure facilities.
At present, many automobile enterprises capable of producing negative-pressure ambulances, such as JLF, SAIC Datsun, BAIC Foton, Brilliance Automobile and Chery Ruifu, are already working overtime to produce them.
Doing a good job of protecting yourself is fundamental
The ambulance, through the development of time and technology, has seen a huge improvement in its performance, and its role has changed from a "carrier" to a "rescuer".
But in the face of an epidemic, it's important to take care of your own protection, or else the number of ambulances, no matter how advanced, won't help.
There is a reason why the state is delaying work and keeping people at home. At this point in time, cutting off the means of transmission depends on people's self-awareness, both for themselves and for others, in order to avoid infection and the further spread of the epidemic.
Remember! The biggest contribution you can make to your country during an epidemic is to stay at home and not go out unnecessarily, and if you have to go out, make sure you wear a good mask and wash your hands regularly.END
Photo courtesy of? CDC
This article comes from the author of the car home, does not represent the views of the car home position.