Negative pressure
Negative Pressure
Negative pressure (pronounced: /ˈnɛɡətɪv ˈprɛʃər/) refers to a situation where the pressure in a certain area is lower than the surrounding environment. It is a key concept in various fields of science, including physics, engineering, and medicine.
Etymology
The term "negative pressure" is derived from the Latin words "negativus" meaning "denying", and "pressura" meaning "pressure". It is used to describe a pressure that is less than the atmospheric pressure.
In Medicine
In the field of medicine, negative pressure is often used in wound care and respiratory therapy.
Wound Care
In wound care, negative pressure wound therapy (NPWT) is a therapeutic technique using a vacuum dressing to promote healing in acute or chronic wounds and enhance healing of second and third degree burns. The therapy involves the controlled application of sub-atmospheric pressure to the local wound environment, using a sealed wound dressing connected to a vacuum pump.
Respiratory Therapy
In respiratory therapy, negative pressure ventilation is a method of assisting or replacing spontaneous breathing by surrounding the chest with a shell that alternately increases and decreases the pressure, causing air to flow in and out of the lungs.
Related Terms
External links
- Medical encyclopedia article on Negative pressure
- Wikipedia's article - Negative pressure
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