Biomechanikstudy_MRI_AKT-O_EN.pd - VACOped

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$Aftertreatment of malleolar fractures following ORIF ... - VACOped$

Pressure distribution measurement vacopedes 2004Table of ContentsPage1. Introduction............................................................................................ 3Plantar pressure distribution measurement............................................ 3Pressure distribution measurements in the shoe................................... 5Time series ...................... ..................................................................... 6Maximum pressure analysis.................................................................. 8Load analysis....................................................................................... 9Mathematical summary of load analysis.............................................. 122. Measurement results........................................................................... 143. Summary.............................................................................................. 194. List of measurements.......................................................................... 22Note:The most important results are summarized in thechapter Summary on pages 19 to 22.The previous chapters serve mainly to explain the measurement andevaluation procedure for the reader interested in the details.Page 2
Pressure distribution measurement vacopedes 20041 IntroductionIn this study, the load on the foot when walking at normal speed was examined,along with what change in the distribution of the load between the back foot and theforefoot different forefoot relief shoes cause. As measuring instruments, pressuremeasurement soles for insertion into the shoe were used. The load in these areascan be determined from the plantar pressure distribution on the sole of the footthrough integration across partial areas of the foot.Measurements were performed on a treadmill, with a measurement duration of 40seconds each. In this time, the test person took about 28 double steps, which werethen averaged out in the evaluation.Apart from normal walking, measurements were also taken walking half steps,walking up stairs and walking up stairs with half steps. These are not evaluatedfurther in this report, however.The forefoot relief shoes to be compared were:- <strong>VACOped</strong>es- <strong>VACOped</strong>es TC- Darco- Bledsoe diabetic boot- SneakersFor the measurements, the test person always wore a therapeutic shoe on onefoot and a sneaker on the other foot.Apart from forefoot relief, the use of such relief shoes for diabetics also requiresoptimal uniform pressure distribution.Plantar pressure distribution measurementThe entire gravity F (generated by the weight of the testperson and by inertia forces) is spread over the contactsurface of the foot sole to the floor. If you imagine thiscontact surface to be divided into small square segments,for example, then a small part of the full ground reactionforce is exerted on each of these segments.The value of the vertical force componentsper surface elementp = F ⊥is referred to as the pressure and specified in N/cm² 2 .AThe current force application point issimply the focal point of all partial forces.2Conversion factors for frequent pressure units:10 4 Pa = 0.1 bar = 1 N/cm 2 = 75.006 mmHg = 75.006 torrThe SI unit of pressure is the Pascal (Pa). N/cm 2 or mmHg are frequently used in the medical field.Fig. 1, schematic:Local distribution of forces onthe sole of the foot, theresulting total force and theforce application pointPage 3
Page 1: Pressure measurements on the VACOpe
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Biomechanikstudy_MRI_AKT-O_EN.pd - VACOped

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