Negative pressure may refer to:
* Negative value of a
pressure
Pressure (symbol: ''p'' or ''P'') is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled ''gage'' pressure)The preferred spelling varies by country and e ...
variable
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Negative room pressure
Negative room pressure is an isolation technique used in hospitals and medical centers to prevent cross-contamination from room to room. , a ventilation technique used to avoid contaminating outside areas
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Negative pressure ventilator
A negative pressure ventilator (NPV) is a type of mechanical ventilator that stimulates an ill person's breathing by periodically applying negative air pressure to their body to expand and contract the chest cavity.Shneerson, Dr. John M., Newmarket ...
, also known as an iron lung
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Negative-pressure wound therapy
Negative-pressure wound therapy (NPWT), also known as a vacuum assisted closure (VAC), is a therapeutic technique using a suction pump, tubing and a dressing to remove excess exudate and promote healing in acute or chronic wounds and second- ...
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