Harris and Beath mat

Harris and Beath mat

rubber mat formed of intersecting squares with walls of varying heights, used to achieve a dynamic record of plantar pressures; the mat is inked and covered with a sheet of paper and the patient walks barefoot across the paper; areas of highest plantar pressure show as areas of increased density of ink when the paper is peeled off the mat (see Table 1)
Table 1: Evaluation of gait
Evaluation deviceCharacteristics
Static evaluation (standing patient)
PlantarscopeA glass platform, whose underside is viewed as a reflection in an angled mirror. Plantar tissues blanch on loading, and areas of greatest pressure show greatest blanching
PodometerAs a plantarscope, but modified to include foot size measurement and calcaneal deviation in the reflected image
PedobaroscopeAn internally lit sheet of glass with a plastic or card interface. When the person stands on the interface the relative plantar pressures are projected as a scaled image from the reflected light
Dynamic evaluation (patient walking, walking/running on a treadmill)
Black paperThe feet are dusted with chalk and the patient walks along the length of the sheet of paper. Gait parameters are recorded from the chalk footprints
Harris and Beath matA rubber mat, marked in intersecting squares of varying pitch, is inked and covered with paper. Areas of high plantar pressure show increased densities of ink in the footprint recorded on the paper
PedobarographA variant of the pedobaroscope, with good resolution and a colour-coded scale of dynamic plantar pressures
MusgraveA research tool: a pressure plate embedded into a walkway and linked to a video camera that gives both static and dynamic three-dimensional images of the plantar pressures
Kistler force plateA research tool: a force plate embedded into a walkway linked to a video camera that gives information about forces passing through foot joints, and the foot in all three planes of space
TechScanAn in-shoe foil that generates images of plantar pressures during gait
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