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plantar pressure

Laetitia Claverie, Anne Ille, Pierre Moretto
The aim of this study was to determine the distribution of discrete sensors under the footprint for accurate plantar pressure analyses. For this purpose, two different sensor layouts have been tested and compared, to determine which was the most accurate to monitor plantar pressure with wireless devices in research and/or clinical practice. Ten healthy volunteers participated in the study (age range: 23-58 years). The barycenter of pressures (BoP) determined from the plantar pressure system (W-inshoe®) was compared to the center of pressures (CoP) determined from a force platform (AMTI) in the medial-lateral (ML) and anterior-posterior (AP) directions...
October 10, 2016: Medical Engineering & Physics
Anita Raspovic, Kate Waller, Wan Mun Wong
AIM: Felt padding is used to offload diabetes-related foot ulceration although limited quality data exists to support its use. This study aimed to quantify pressure offloading from neuropathic plantar foot ulcers in a clinical setting, when felt padding is first applied and after wear. METHODS: This study used a within-subjects, repeated measures design. Data was collected in a high-risk foot service. Peak plantar pressures, contact area and contact time were measured in 15 diabetes subjects with 16 non-complicated plantar neuropathic foot ulcers, with: no felt padding, newly applied felt padding and felt padding after one week of wear...
September 28, 2016: Diabetes Research and Clinical Practice
Visar Berki, Brian L Davis
How high does pressure and shear stress sensor resolution need to be in order to reliably measure the plantar pressure and shear profiles (PPSPs) under normal and diabetic feet? In this study, pressure and shear stress data were collected from 26 total diabetic and control subjects using new instrumentation that measures vertical and horizontal force vectors of the plantar contact surface during multiple instances in the gait cycle. The custom built shear-and-pressure-evaluating-camera-system (SPECS) performs simultaneous recordings of pressure and both components of the horizontal force vector (medio-lateral and antero-posterior) at distinctive regions under one׳s foot, at a spatial resolution for each sensor equal to 1...
September 21, 2016: Journal of Biomechanics
Ernst A Chantelau
BACKGROUND: In diabetic persons with painless neuropathic foot ulceration, foot skin was found to be insensate to noxious pinprick stimulation (stimulation area less than 0.05 mm(2)), while compression of deep subcutaneous foot tissues by Algometer II(®) (stimulation area 1 cm(2)) could evoke a deep dull aching. To elucidate this discrepancy, the Algometer II stimulation technique was critically reviewed by varying probe sizes and anatomical sites in the same study population 3 years later...
2016: Diabetic Foot & Ankle
Du-Xin Liu, Xinyu Wu, Wenbin Du, Can Wang, Tiantian Xu
Gait phase is widely used for gait trajectory generation, gait control and gait evaluation on lower-limb exoskeletons. So far, a variety of methods have been developed to identify the gait phase for lower-limb exoskeletons. Angular sensors on lower-limb exoskeletons are essential for joint closed-loop controlling; however, other types of sensors, such as plantar pressure, attitude or inertial measurement unit, are not indispensable.Therefore, to make full use of existing sensors, we propose a novel gait phase recognition method for lower-limb exoskeletons using only joint angular sensors...
2016: Sensors
Liubov E Amirova, Nastassia M Navasiolava, Marie-Pierre Bareille, Arnaud Beck, Elena S Tomilovskaya, Inessa B Kozlovzkaya, Guillemette Gauquelin-Koch, Claude Gharib, Marc-Antoine Custaud
PURPOSE: Walking is a complex locomotor process that involves both spinal cord reflexes and cortical integration of peripheral nerve input. Maintaining an upright body position requires not only neuromuscular activity but also cardiovascular regulation. We postulated that plantar mechanical stimulation might modulate autonomic nervous system activity and, thereby, impact blood pressure adaptation during standing. METHODS: Twelve healthy subjects underwent three randomly ordered 45-min 70°-saddle tilt tests while the plantar surfaces of the feet were stimulated using specially engineered Korvit boots in the following modes: (1) no stimulation, (2) disrupted stimulation, and (3) walking mode...
September 29, 2016: European Journal of Applied Physiology
H Ozkan, T Ege, K Koca, N Can, Y Yurttas, S Tunay
The aim of the current study was to assess the changes of plantar foot pressures with pedobarography in -patients with Achilles tendon repair by minimally -invasive surgical technique. This retrospective study consisted of 15 consecutive patients who were treated for acute Achilles' tendon repair with minimally invasive technique in our clinic in a two year period between 2010 and 2012. All patients were male. The mean age was 28.7 years (24-42) and the mean follow-up time was 2.3 years (1.5- 3). All patients had sports related Achilles' tendon rupture and all had undergone surgery in 24-48 hours...
August 2016: Acta Orthopaedica Belgica
Imen Fekhfekh, Abdelmoneem Yahia, Mokhtar Chaabene, Salma Jribi, Nizar Suissi, Mohamed Habib Elleuch, Sameh Ghroubi
OBJECTIVE: To study the acute effect of static and dynamic stretching on the knee muscle strength and postural capacity in athletes. PATIENTS AND METHODS: Fifteen judokas performed 2 stretching protocols (static and dynamic) on the muscles of both lower limbs with an interval of 48hours in a random order. An evaluation of the dominant knee muscle strength with an isokinetic dynamometer CybexNormII was performed before and after each stretching protocol in a concentric mode at a speed of 60 and 180°/s...
September 2016: Annals of Physical and Rehabilitation Medicine
Abdelmoneem Yahia, Houcem Ksentini, Salma Jribi, Atika Mellek, Mohamed Habib Elleuch, Sameh Ghroubi
OBJECTIVE: The aim of the study was to investigate the relations between isokinetic muscle strength of the knee, postural profile and physical function in knee osteoarthritis patients. MATERIAL/PATIENTS AND METHODS: We included patients with advanced unilateral osteoarthritis (grades III or IV graded radiographically by Lawrence classification). We assessed functional impairment by the WOMAC score in its Arabic version, the strength of the knee muscles by isokinetic dynamometry and postural profile via the Satel(®) platform in bipodal and monopodal conditions in open and closed eyes...
September 2016: Annals of Physical and Rehabilitation Medicine
Véronique Bourg, Guillaume Fumery, Pierre Moretto
OBJECTIVE: We present a preliminary study of plantar pressure control with visual feedback in healthy volunteers by using internal or external focus attentional focalization. The objectives are to decrease the pressure under the right heel of 70%. MATERIAL/PATIENTS AND METHODS: Twenty healthy volunteers were randomized into 2 groups using either internal or external focus. Plantar pressures were recorded using 3 captors under each heel, on the heads of 1st and 5th metatarsals as well as under the calcanean tuberosity (Winshoe device, Medicapteurs C)...
September 2016: Annals of Physical and Rehabilitation Medicine
Paolo Caravaggi, Alessia Giangrande, Giada Lullini, Giuseppe Padula, Lisa Berti, Alberto Leardini
Health and safety regulations in many countries require workers at risk to wear safety shoes in a factory environment. These shoes are often heavy, rigid, and uncomfortable. Wearing safety shoes daily leads to foot problems, discomfort and fatigue, resulting also in the loss of numerous working days. Currently, knowledge of the biomechanical effects of insoles in safety shoes, during working activities, is very limited. Seventeen workers from a metalworking factory were selected and clinically examined for any foot conditions...
September 11, 2016: Gait & Posture
Paolo Caravaggi, Alberto Leardini, Claudia Giacomozzi
Plantar load can be considered as a measure of the foot ability to transmit forces at the foot/ground, or foot/footwear interface during ambulatory activities via the lower limb kinematic chain. While morphological and functional measures have been shown to be correlated with plantar load, no exhaustive data are currently available on the possible relationships between range of motion of foot joints and plantar load regional parameters. Joints' kinematics from a validated multi-segmental foot model were recorded together with plantar pressure parameters in 21 normal-arched healthy subjects during three barefoot walking trials...
September 16, 2016: Journal of Biomechanics
Wen-Lan Wu, Hsiu-Tao Hsu, I-Hua Chu, Feng-Hua Tsai, Jing-Min Liang
In order to help coaches analyse the techniques of professional in-line speed skaters for making the required fine adjustments and corrections in their push-off work, this study analysed the specific plantar pressure characteristics during a 300-m time-trial test. Fourteen elite in-line speed skaters from the national team were recruited in this study. The total completion time of the 300-m time-trial test, duration of each skating phase, and plantar pressure distribution were measured. The correlation between plantar pressure distribution and skating performance was assessed using Pearson correlation analyses...
September 23, 2016: Sports Biomechanics
Jinsup Song, Kersti Choe, Michael Neary, Rebecca A Zifchock, Kenneth Cameron, Michael Trepal, Marian Hannon, Howard J Hilstrom
INTRODUCTION AND OBJECTIVES: Healthy feet are important for overall health and well-being. Previous studies of older subjects showed that those with a lowered arch had an increased odds of having foot deformities, pain, and hyperpronation in gait. (1-3) No investigation to date has comprehensively characterized foot biomechanics in a large sample of healthy active young subjects. METHODS: Foot structure, function, and arch height flexibility (AHF) were measured in 1,052 incoming cadets to the United States Military Academy...
September 2016: Journal of the American Podiatric Medical Association
Malindu E Fernando, Robert G Crowther, Peter A Lazzarini, Kunwarjit S Sangla, Scott Wearing, Petra Buttner, Jonathan Golledge
BACKGROUND: Current international guidelines advocate achieving at least a 30 % reduction in maximum plantar pressure to reduce the risk of foot ulcers in people with diabetes. However, whether plantar pressures differ in cases with foot ulcers to controls without ulcers is not clear. The aim of this study was to assess if plantar pressures were higher in patients with active plantar diabetic foot ulcers (cases) compared to patients with diabetes without a foot ulcer history (diabetes controls) and people without diabetes or a foot ulcer history (healthy controls)...
September 15, 2016: BMC Endocrine Disorders
Fátima Ramalho, Filomena Carnide, Rita Santos-Rocha, Helô-Isa André, Vera Moniz-Pereira, Maria L Machado, António P Veloso
Functional fitness (FF) and gait ability in older populations have been associated with increased survival rates, fall prevention and quality of life. One possible intervention for the improvement of FF is well-structured exercise programs. However, there are inconsistent findings regarding the effects of exercise interventions in the maintenance of gait parameters. The aim of this protocol is to develop a community-based exercise intervention targeting an older population. The intervention aim is the improvement of gait parameters and FF...
September 6, 2016: Journal of Aging and Physical Activity
Fatih Karaaslan, Musa Uğur Mermerkaya, Alper Çıraklı, Sinan Karaoğlu, Fuat Duygulu
INTRODUCTION: Controversy remains regarding the optimal treatment method and postoperative rehabilitation of acute Achilles tendon ruptures. In this study, pedobarographic assessments of surgical and conservative treatments were compared. MATERIAL AND METHODS: A prospective assessment was made of 16 patients (eight surgical, eight conservative) and eight healthy controls using a plantar pressure measurement system. Biomechanical gait parameters were obtained using the Footscan dynamic gait analysis system...
2016: Therapeutics and Clinical Risk Management
Zhong-Fei Xu, Shuang Bai, Zhi-Qiang Zhang, Wei-Yi Duan, Zhi-Qiang Wang, Chang-Fu Sun
BACKGROUND: The free fibula flap has become popular for mandibular reconstruction. The purpose of this study was to propose comprehensive functional assessments of the donor site. METHODS: Thirty free fibula flaps for mandible reconstruction were prospectively enrolled in the study. Objective assessments included isokinetic testing of the ankle joint, electromyographic examination of the superficial peroneal nerve (SPN), and preoperative and postoperative foot scans...
September 12, 2016: Head & Neck
Thilina W Weerasinghe, Ravindra S Goonetilleke, Uwe Reischl
The objective was to develop a methodology to assess Pressure Discomfort Thresholds (PDT), Pressure Pain Thresholds (PPT), and tissue stiffness on the plantar surface of the foot. Ten male and ten female participants volunteered for the study. Foot landmarks were used to create a standardized grid-type template of 95 points. For each test point, PPT and PDT values were obtained, and stiffness was calculated for each of the twenty participants. Cluster analyses were performed to determine the regions of similarity for the three dependent variables, PPT, PDT and stiffness...
September 9, 2016: Ergonomics
Tuğba Kuru Çolak, İlker Çolak, Eren Timurtaş, Güven Bulut, M Gülden Polat
Misalignment of the talar neck after surgical repair can redistribute the load among the posterior, middle, and anterior facets of the subtalar joints, which can change the joint biomechanics, cause arthritis, and impair function. However, we found no studies analyzing the plantar pressures after treatment of talus neck fracture. We determined the dynamic plantar pedobarographic and radiographic characteristics and ankle range of motion, function, and pain among patients after surgical repair of talar neck fractures...
September 2, 2016: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
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