Negative spatial pressure is an isolation technique used in hospitals and medical centers to prevent cross-contamination from room to room. This includes a ventilation system that produces negative pressure to allow air to flow into the isolation chamber but does not escape from the room, since air will naturally flow from high-pressure areas to low-pressure areas, thus preventing the contaminated air from escaping the room. This technique is used to isolate patients with infectious diseases in the air such as tuberculosis, measles, or chicken pox.
Video Negative room pressure
Mekanisme
Negative pressure is generated and maintained by a ventilation system that removes more exhaust air from the room than allowed air into the room. Air is allowed into the room through a gap under the door (usually about one and a half inches high). Except for this gap, the room should be as close as possible, not allowing air to enter through gaps and crevices, such as around windows, lights and electrical outlets. Leaks from these sources can harm or eliminate the negative pressure of the room.
Maps Negative room pressure
Smoke test
The smoke test can help determine if the room is under negative pressure. A smoke-filled tube is held near the bottom of the negative pressure room door, about 2 inches in front of the door. The smoke tube is placed parallel to the door, and a small amount of smoke is then generated by squeezing the ball gently. Treatment is taken to release the smoke from the tube slowly to ensure the smoke velocity of the tube does not beat the air velocity. If the room is at negative pressure, the smoke will move under the door and into the room. If the room is not a negative pressure, the smoke will be blown out or will remain silent.
See also
- Positive space pressure
References
Source of the article : Wikipedia
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