What is a Negative Pressure Ambulance?
2 Answers
Negative pressure in an ambulance refers to the use of technical means to create a lower air pressure inside the vehicle compared to the external atmospheric pressure. This ensures that air flows from outside to inside when freely moving, and the air inside is discharged after being treated to be harmless, thereby preventing the spread of infections to more people. Related information about tire pressure is as follows: 1. Introduction: Tire pressure, strictly speaking, refers to the pressure of the air inside the tire. In terms of car maintenance, the engine is the heart of the car, and its damage can lead to the end of the car's life. Similarly, tire pressure is like the blood pressure of the car, and the level of tire pressure plays a crucial role in the performance and power of the vehicle. 2. Hazards of excessive tire pressure: It reduces the friction and adhesion of the tires, affecting braking performance; it causes steering wheel vibration and deviation, reducing driving comfort.
A negative pressure ambulance is a special vehicle designed specifically for transporting patients with infectious diseases. Inside, specialized equipment maintains a lower air pressure compared to the outside, ensuring that air only flows from outside into the vehicle. However, any contaminated air inside must pass through a high-efficiency filtration system before being expelled, capturing 99% of viruses and bacteria. For example, when transporting COVID-19 patients, this type of ambulance prevents virus leakage during stops at traffic lights or while loading/unloading, thereby protecting pedestrians and other vehicles. I’ve also seen monitoring footage from the rear compartment of such ambulances—airflow is carefully controlled while medical staff operate inside, and exhaust vents continuously monitor filtration efficiency. These ambulances cost significantly more than regular ones, with the air purification system alone costing around 50,000 to 60,000 RMB. Yet, they are absolutely critical for containing the spread of epidemics. Every major city now maintains a stock of negative pressure ambulances to respond swiftly to public health emergencies.
