Positive pressure
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Positive pressure is a pressure within a system that is greater than the environment that surrounds that system. Consequently, if there is any leak from the positively pressured system, it will egress into the surrounding environment. This is in contrast to a
Use is also made of positive pressure to ensure there is no ingress of the environment into a supposed closed system. A typical example of the use of positive pressure is the location of a habitat in an area where there may exist flammable gases such as those found on an oil platform or laboratory cleanroom. This kind of positive pressure is also used in operating theaters and in vitro fertilisation (IVF) labs.[citation needed]
Hospitals may have positive pressure rooms for patients with compromised immune systems. Air will flow out of the room instead of in, so that any airborne microorganisms (e.g., bacteria) that may infect the patient are kept away.[2]
This process is important in human and chick development. Positive pressure, created by the closure of anterior and posterior
development.Amphibians use this process to respire, whereby they use positive pressure to inflate their lungs.
Historic utility
Industrial utility
Industrial use of positive pressure systems are commonly used to ventilate confined spaces with dust, fumes, pollutants and/or high temperatures [3]
Clinical utility
Many hospitals are equipped with negative and positive pressure rooms just for the purposes described.
See also
- Filtered air positive pressure
- Negative pressure (disambiguation)
- Negative room pressure
- Overpressure (CBRN protection)
- Plenum chamber
- Positive pressure enclosure
References
- ^ Angstrom-Tech-Admin (2016-04-20). "What's the Difference Between Positive and Negative Air Pressure Cleanrooms?". Angstrom Technology. Retrieved 2020-05-01.
- ^ a b "Negative and Positive Pressure Rooms 101 | Hospital Infection Control". Air Innovations. 2019-04-29. Retrieved 2020-05-02.
- ^ Positive pressure technology for construction and industrial ventilation applications.
https://www.southern-tool.com/store/cms//142/b32e0_184-item.pdf
- PMID 15573039.