ABSTRACT
PURPOSE: The most common cause of plantar ulceration is an excessive plantar pressure in patients with peripheral neuropathy. Foot orthosis and therapeutic footwear have been used to decrease the plantar pressure and prevent the plantar ulceration in in diabetes patients. We investigated whether protective sock with functional insoles reduce plantar pressure while walking in 17 diabetes patients. METHODS: An in-shoe measurement device was used to measure the peak plantar pressure while walking. Peak plantar pressure data were collected while walking under two conditions: 1) wearing diabetic sock and 2) wearing the protective sock with functional insoles. Each subject walked 3 times in 10-m corridor under three conditions, and data were collected in 3 steps in the middle of corridor with in right and left feet, respectively. Pared t-test was used to compare the peak plantar pressures in three plantar areas under these two conditions. RESULTS: The protective sock with functional insoles significantly reduced the peak plantar pressure on the lateral rearfoot, but significantly increased the peak plantar pressure on the middle forefoot, and medial midfoot (p 0.05). CONCLUSION: The protective sock with functional insoles reduced plantar pressures in the rearfoot and supported the medial longitudinal arch. However, it is necessary to change the position of metatarsal pad in the insole design of forefoot area to prevent diabetic foot ulceration.
Subject(s)
Humans , Diabetes Mellitus , Diabetic Foot , Foot Orthoses , Foot Ulcer , Foot , Metatarsal Bones , Peripheral Nervous System Diseases , Ulcer , WalkingABSTRACT
Este es un trabajo donde se desarrolló e implementó un sistema integrado que combina una plan-tilla instrumentada con sensores de presión y un módulo de sensores inerciales compuesto por un acelerómetro y un giroscopio, los cuales permitio la medición de variables baropodométricas (presiones plantares) y variables cinemáticas (aceleración, velocidad angular y desplazamiento angular) del pie. El sistema resultante le deja al especialista realizar un estudio biomecánico del pie a través del análisis estático y/o dinámico del movimiento y la visualización en pantalla de da-tos cuantitativos e información cualitativa, para la evaluación e intervención de los deportistas.
This paper presents the development and implementation of an integrated system that combi-nesan insole instrumented with pressure sensors and an inertial sensor module consists of an accelerometer and a gyroscope, which allows measurement of baropodometric variables (plantar pressures) and kinematic variables (acceleration, angular rate, and angular displacement) of the foot. The resulting system allows the specialist to conduct a foot biomechanical study through static and/or dynamic analysis and screen display of quantitative data and qualitative informa-tion, whose analysis allows prevention and intervention programs for musculoskeletal disorders that may affect the performance of athletes.
Subject(s)
Humans , Biomechanical Phenomena , Acceleration , Equipment and Supplies , SportsABSTRACT
Objective To compare the parameters of plantar pressures between the obese children and normal children during walking on the flat ground at normal speed, and to discuss the effect of obesity on dynamic plantar pressures for 7-11 years obese children. MethodThere were 40 volunteer subjects, twenty obese children and twenty normal children between 7 and 11 years of age in this study. Subjects were asked to walk at their own paces on a 10 m walkway with a 0.5 m footscan plate (footscan from RSscan International, Olen, Belgium) Sampling at 300 Hz. Data were processed statistically by SPSS11.5 and EXCEL. ResultsCompared to the normal children: 1.the obese children have the longer foot support duration and shorter push off duration; 2.the peak plantar pressures are larger and appearing time is longer of Metatarsal 4 (M4) and Metatarsal 5 (M5), the peak plantar pressures of Toe 2 (T2) to Toe 5 (T5) on obese children group are higher. 3. AI (arch index) and impulse percentage of mid foot and heel of obese children group are much larger. 4. Supination extent of the left foot in heel strike phase, supination extent of the right foot in foot support phase and in push off phase on obese children group are also larger. In addition, significant difference in pronation extent appeared between left and right foot in obese children group. 5. The footaxis angle of obese children group is obviously larger. ConclusionsCompared to the normal children: 1. the walking stability of obese children group in this study is weaker. 2. Obese children are vulnerable to injure their foot foresole, ankle joint and knee joint. 3. Obese children endure flat foot more easily. 4. Obese children walk more frequently with outward splayfoot.