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Most recently, pressure imaging (or pressure mapping) is used to help determine each individual's pressure distribution to properly determine and fit a seating system. [ 35 ] [ 36 ] [ 37 ] While almost all wheelchair users will use a wheelchair cushion, some users need more extensive postural support.
A number of studies point to interface pressure between the body and the seating surface as the primary contributor to the formation of pressure sores. [1] In response, manufacturers have developed a number of wheelchair seat cushion alternatives. Over 200 models of wheelchair cushions were on the market [where?] as of 2001. [6] [needs update]
In medicine, the mean arterial pressure (MAP) is an average calculated blood pressure in an individual during a single cardiac cycle. [1] Although methods of estimating MAP vary, a common calculation is to take one-third of the pulse pressure (the difference between the systolic and diastolic pressures), and add that amount to the diastolic pressure.
Wheelmap.org is an online, worldwide map for finding and marking wheelchair accessible places, developed by the German nonprofit organisation Sozialhelden e.V. Anyone can find and add public places to the map and rate them according to a simple traffic light system.
Active sitting is the practice of enabling or encouraging movement while seated. It is also commonly known as dynamic sitting. The underlying notion highlights the advantages of incorporating flexibility and movement while sitting, as it can positively impact the human body and allow the completion of certain tasks that require sitting. [1] "
A similar term, mean circulatory filling pressure, (MCFP) is defined as the mean pressure that exists in the combined circulatory system & pulmonary system when there is no blood motion. The value of MSP in animal experimental models is approximately 7 mm Hg.
The seating surface is typically composed of a rigid seat pan topped with an upholstered foam cushion. The primary function of the cushion is to provide comfort, and this is achieved by spreading the pressure distribution across the occupant's body, reducing concentrations of pressure.
The main feature of thermodynamic diagrams is the equivalence between the area in the diagram and energy. When air changes pressure and temperature during a process and prescribes a closed curve within the diagram the area enclosed by this curve is proportional to the energy which has been gained or released by the air.