Negative Pressure System
Negative Pressure System - Related Videos
11:26
Assessing Cerebral Autoregulation via Oscillatory Lower Body Negative Pressure and Projection Pursuit Regression
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Cited by 7 •
2014
Cerebral perfusion is maintained across a range of pressures via cerebral autoregulation. However, characterizing autoregulation requires prominent pressure fluctuations at regulated frequencies. The described protocol will show how oscillatory lower body negative pressure can generate pressure fluctuations to provide data for projection pursuit regression for quantification of the autoregulatory curve.
14:09
Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
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Cited by 31 •
2013
We describe a "gold standard" for evaluating orthostatic tolerance (OT) using tilt testing with combined lower body negative pressure (LBNP). This can be combined with non-invasive evaluations of cardiovascular reflex control. Normal and abnormal responses are defined.
07:26
Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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Cited by 5 •
2013
The laser heated diamond anvil cell combined with synchrotron micro-diffraction techniques allows researchers to explore the nature and properties of new phases of matter at extreme pressure and temperature (PT) conditions. Heterogeneous samples can be characterized in situ under high pressure by 2D mapping and combined powder, single-crystal and multigrain diffraction approaches.
06:05
Development of a Negative Selectable Marker for Entamoeba histolytica
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Cited by 3 •
2010
We report development of a negative selection system in E. histolytica based upon transgenic expression of a chimeric protein (FCU1) and selection with the prodrug 5-fluorocytosine. The FCU1 protein is a fusion of yeast cytosine deaminase and uracil phosphoribosyltransferase. Expression of FCU1 resulted in increased E. histolytica sensitivity towards 5-fluorocytosine.
09:31
Normothermic Negative Pressure Ventilation Ex Situ Lung Perfusion: Evaluation of Lung Function and Metabolism
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2022
This paper describes a porcine model of negative pressure ventilation ex situ lung perfusion, including procurement, attachment, and management on the custom-made platform. Focus is made on anesthetic and surgical techniques, as well as troubleshooting.
FAQs
The key mechanism is a pressure gradient between the controlled space and its surroundings. When air or fluid is removed, the lower-pressure area draws material inward, establishing a preferred direction of flow. This directional movement helps keep exudate within collection pathways during wound care and helps prevent contaminated air from escaping a clinical room.
Each component supports a different part of the process. Pumps or ventilation controls remove air, tubing provides a defined route for air or fluid, and filters help manage material moving through the system. Pressure monitors track the pressure difference so clinicians can maintain controlled operation rather than relying only on the pump or ventilation setting.
Negative pressure wound therapy focuses on fluid management at a wound site, using controlled suction to remove exudate and maintain a protected local environment. Negative pressure rooms focus on infection control by containing airborne contaminants within the room. Both depend on inward flow, but one primarily manages wound drainage while the other addresses environmental containment.
Monitoring helps confirm that the intended pressure relationship remains established while air or fluid is being removed. If the controlled space does not remain below surrounding pressure, inward flow or containment may not function as intended. In clinical use, this supports safer operation of systems designed for exudate management, airborne contaminant control, or both.
Operation begins by establishing the controlled space and connecting the appropriate pump or ventilation control, tubing, filters, and pressure monitoring components. Air or fluid is then removed to create the pressure difference, while the pathway and pressure are observed during use. This workflow directs material inward and supports the system's intended clinical function.
The choice depends on what must be controlled. Wound-focused use is appropriate when the clinical goal is to remove exudate and support a protected wound environment. Room-focused use is relevant when the concern is airborne contamination and preventing its escape. The same pressure principle therefore serves different targets: localized fluid or surrounding air.
Their outcomes depend on the application. In wound care, controlled suction supports removal of exudate and helps maintain a protected wound environment. In room ventilation, inward airflow supports containment of airborne contaminants. More broadly, the systems contribute to fluid management, infection control, and improved safety for patients and healthcare workers.
Safety comes from directing unwanted material toward controlled pathways instead of allowing it to move freely into the surrounding environment. Filters, tubing, and pressure monitoring support that control, while the selected application addresses either wound drainage or airborne contaminants. Together, these functions can reduce exposure concerns and support safer conditions for patients and healthcare workers.