A reciprocal walking orthosis hip joint for young paediatric patients with a variety of pathological conditions

2001 ◽  
Vol 25 (1) ◽  
pp. 47-52 ◽  
Author(s):  
P. J. Woolam ◽  
B. Lomas ◽  
J. Stallard
Keyword(s):  
Hip Joint ◽  
Sagittal Plane ◽  
Vertical Axis ◽  
Lower Limbs ◽  
Knee Joints ◽  
Hip Joints ◽  
Flexion Extension ◽  
Total Body ◽  
Lateral Rigidity ◽  
Adjustable Range

A growing trend in the use of reciprocal walking orthoses for infant paraplegic patients, and their application for control of the lower limbs in very young total body involved cerebral palsy patients, has created a need for smaller components. A prototype design of a hip joint has been produced which provides the following features: adjustable range of flexion/extension control; override on stops to permit sitting; high lateral rigidity; no lateral bearing play; very high rigidity in the sagittal plane; low friction bearings; high resistance to torque about the vertical axis. In addition a size envelope which is more in keeping with the dimensions of infant patients was an important objective. Comparisons were made of the computed structural properties of the prototype joint and existing routinely available standard orthotic hip joints. In each plane of loading the prototype joint had the highest identified structural property. The hinge-bearing material was tested in a representative joint with 200,000 cycles of typical loading. It was also field tested on adult orthoses over a minimum of a 12-month period with the most vigorous of walkers. In neither test did excessive play develop. The mechanical properties of the joint were established using tests advocated in the British Standard on testing lower limb orthosis knee joints. These showed the joint had structurally equivalent performance to a successful reciprocal walking orthosis hip joint, and that the mode of failure was essentially ductile in nature. Production development of the joint is now being undertaken.

scholarly journals Hip abduction and supported standing affect the ranges of hips extension in spinal muscular atrophy patients

2020 ◽  
Author(s):  
Agnieszka Stępień ◽  
Joanna Sikora-Chojak ◽  
Katarzyna Maślanko ◽  
Wojciech Kiebzak
Keyword(s):  
Spinal Muscular Atrophy ◽  
Hip Joint ◽  
Sagittal Plane ◽  
Muscular Atrophy ◽  
Lower Limbs ◽  
Control Group ◽  
Hip Joints ◽  
Hip Abduction ◽  
And Control ◽  
Healthy Participants

Introduction: Recommendations for management of spinal muscular atrophy (SMA) do not contain detailed information about the position of lower limbs during support standing. It has been observed that during the measurement of the range of extension in the hip joint (HE) in SMA patients, the examined limb was often naturally abducted. Aim: The main aim of the study was to compare the values of HE in the sagittal plane and in abduction, and to assess the correlation between the duration of supported standing and HE in SMA patients. Material and methods: The study group consisted of 75 SMA individuals aged 2–22 years and control group consisted of 202 healthy participants. The measurements were performed with the Rippstein plurimeter and goniometer. Results and discussion: Range of HE in SMA patients was larger in abduction than in the sagittal plane. A correlation was noted between the duration of supported standing and HE. Conclusions: Supported standing with hip joint abduction should be used in SMA patients. The obtained results broaden the knowledge about the biomechanics of hip joints in SMA patients.

Evaluation of hip joint mobility among female students of higher education institutions

2019 ◽  
pp. 42-47
Author(s):  
Yana V. PLATONOVA ◽  
Valery N. YAKOVLEV ◽  
Sergey V. SAYKIN
Keyword(s):  
Hip Joint ◽  
Female Students ◽  
Lower Limbs ◽  
Joint Mobility ◽  
State University ◽  
Hip Joints ◽  
Average Group ◽  
Motor Load ◽  
Effectiveness Of Training ◽  
Motor Actions

In this article we presented the results of the study of hip joint mobility among 1-4 year students of Derzhavin Tambov State University engaged in health aerobics and its various types. The level of development of mobility in female students' hip joints to a large extent determines the effectiveness of training in the equipment of elements in classes of health aerobics, containing a significant number of movements performed by lower limbs (grazing, wavy, squat, etc.). Hip joint refers to spherical joints and therefore allows: bending and unbending; assignment and reduction; pronation and supination; roundabout. In everyday life, the maximum degree of motor load on the hip joint occurs during walking. However, the amplitude of hip movements used in walking does not reach a potential value, and the execution of circular and lateral movements is minimized. This circumstance at classes of health aerobics with female students is clearly demonstrated by the constriction of movements and lack of proper amplitude when performing motor actions with lower limbs. The mobility of female students' hip joint was assessed by the test «Cross split». The average group values obtained by the «Cross split» test served as the basis for the development of a scale for assessing the level of mobility in hip joints.

scholarly journals Dysfunction in the hip joints in children with Charcot-Marie-Tooth syndrome (literature review)

2015 ◽  
Vol 3 (3) ◽  
pp. 52-56
Author(s):  
Ivan Yurievich Pozdnikin
Keyword(s):  
Early Diagnosis ◽  
Hip Joint ◽  
Clinical Signs ◽  
Sensory Neuropathy ◽  
Disease Diagnosis ◽  
Lower Limbs ◽  
Foot Deformities ◽  
Hip Joints ◽  
Charcot Marie Tooth ◽  
Reconstructive Operations

A review of the literature on the treatment of children with dysfunction in the hip joints in motor-sensory neuropathy Charcot-Marie-Tooth is presented. Peculiarities of disease diagnosis and the approach used in the treatment of patients are described. The Charcot-Marie-Tooth syndrome is a hereditary neuromuscular disease characterized by progressive atrophy of the distal muscle group of the lower limbs. According to international authors, the incidence of hip joint dysfunction in this condition is at least 10%, ranking second only to foot deformities. In the Russian literature, the problem has not been adequately interpreted. Early diagnosis of dysfunction in the hip joints during Charcot-Marie-Tooth syndrome is complicated by the child's age and is characterized by progression. Conflicting clinical signs and trivial symptoms of the disease also confuse diagnosis, until it becomes clearer in adolescence or the second or third decade of life. Surgical reconstructive operations on the hip joint often occur too late, and they are accompanied by a greater frequency of neurological complications. Practitioner awareness coupled with an early diagnosis of hip subluxation and decentration and complex orthopedic and neurological examinations of children with the disease of Charcot-Marie-Tooth should result in more favorable outcomes.

scholarly journals Defect free optimization of a polycentric prosthetic knee design using imperialist competition-inspired optimization method

2021 ◽  
Author(s):  
Nejlaoui M ◽  
◽  
Alateyah A. I. ◽  
El-Garaihy W. H. ◽  
◽  
...  
Keyword(s):  
Knee Joint ◽  
Sagittal Plane ◽  
Knee Prosthesis ◽  
Tracking Error ◽  
Lower Limbs ◽  
Optimization Approach ◽  
Center Of Rotation ◽  
Multi Objective ◽  
Flexion Extension ◽  
Instantaneous Center

The disability of lower limbs is one of the major problems facing human lives. In order to restore the missing functionality and aesthetic feature of the amputee's locomotion, finding the optimal design of the human lower limb knee prosthesis is crucial. This paper focuses the design optimization of a four bar knee mechanism capable to reproduce the complex flexion/extension knee joint motion in the sagittal plane with variable instantaneous center of rotation positions. Thus an optimization approach with appropriate constraints is formulated in order to consider the degree of compatibility between the instantaneous center of rotation trajectories of the human reference knee joint and the four bar knee mechanism. To solve this high nonlinear optimization problem, an algorithm based on multi-objective modified imperialist competitive method is proposed where all the constraints are managed with the penalty method. The results obtained by the multi-objective modified imperialist competitive method showed the capability to reach a small tracking error. The obtained results prove the effectiveness of the proposed optimization approach for the optimal synthesis of the four bar knee mechanism, compared with other literature techniques.

scholarly journals Design and Implementation of a Robotic Hip Exoskeleton for Gait Rehabilitation

Actuators ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 212
Author(s):  
Shi-Heng Hsu ◽  
Chuan Changcheng ◽  
Heng-Ju Lee ◽  
Chun-Ta Chen
Keyword(s):  
Degrees Of Freedom ◽  
Lower Limbs ◽  
Gait Rehabilitation ◽  
Hip Joints ◽  
Gait Control ◽  
Design And Implementation ◽  
Model Free ◽  
Active Flexion ◽  
Flexion Extension ◽  
Linear Extended State Observer

In this paper, a four degrees-of-freedom robotic hip exoskeleton was proposed for gait rehabilitation. The robotic hip exoskeleton was designed with active flexion/extension and passive abduction/adduction at each hip joint to comply with the movement of the thigh. Due to each user’s different lower limbs characteristics and unknown torques at hip joints, model-free linear extended state observer (LESO)-based controllers were proposed for rehabilitation gait control. The prototypes of the robotic hip exoskeleton and controller designs were validated and compared through walking and ascending rehabilitation experiments. Additionally, a motion captured system and EMG signals were used to investigate the walking assistance of the robotic hip exoskeleton.

scholarly journals Pre-Surgery Planning of Lower Limbs Major Joints Arthroplasty

2019 ◽  
Vol 7 (17) ◽  
pp. 2838-2843 ◽  
Author(s):  
Alexey Vladimirovich Lychagin ◽  
Vadim Gennadievich Cherepanov ◽  
Pavel Igorevich Petrov ◽  
Ivan Antonovich Vyazankin ◽  
Galina Eduardovna Brkich
Keyword(s):  
Knee Joint ◽  
Hip Joint ◽  
Computer Tomography ◽  
Axial Load ◽  
Lower Limbs ◽  
Congenital Deformity ◽  
Hip Joints ◽  
Surgery Planning ◽  
X Ray ◽  
Total Knee

BACKGROUND: Knee and hip joints endoprosthetics are the main surgical method of arthrosis treatment. The epidemiological incidence rate of the disease is growing steadily every year, affecting younger and younger people. Despite the proven tactics of joint endoprosthetics, an important issue is quality planning of surgery. AIM: The aim of this research is to develop a device and a method that would contribute to solving the existing challenges of pre-surgery planning of hip endoprosthetics in patients with related pathologies, which have caused compensatory deformation, and making long vertebrarium-pelvis-lower limbs scout images with the patient lying on his back with an axial load in a computer tomography. METHODS: Analog X-ray photographs of the pelvis made on film, digital DICOM images, and special planning programs are used for planning. However, according to numerous studies, the disease of the hip joint is not an independently isolated pathology. In most cases, this pathology is accompanied by changes in the lumbar spine. Often, patients prepared for endoprosthetics have a congenital deformity of tarsus or hip segment, which, during the knee, joint endoprosthetics surgery causes difficulties with the installation of an intramedullary guide. RESULTS: The results after total knee arthroplasty according to the method modified at the Department showed a reduction of the WOMAC index slightly more than twice down to 37.26 ± 7.92. The number of revision surgeries after endoprosthetics decreased from 5 (5.7%) to 1 (1.1%) for the hip joint, and from 7 (4.3%) to 2 (1.3%) for the knee joint, respectively. CONCLUSION: To form a proper guide entry point, it is necessary to assess the segment at the stage of surgery planning and examination of patients, which can be done using the proposed method. To remove the complications during the pre-surgery planning of hip joint endoprosthetics in patients with related pathologies, a device and methods have been developed for obtaining long topograms of the vertebrarium-pelvis-lower limbs complex with the patient lying on his back with the axial load in computer tomography.

scholarly journals Investigation of Meshing Strategy on Mechanical Behaviour of Hip Stem Implant Design Using FEA

2020 ◽  
Vol 10 (1) ◽  
pp. 769-775
Author(s):  
◽  
Joko Triyono ◽  
Aditya Rio Prabowo ◽  
Jung Min Sohn
Keyword(s):  
Hip Joint ◽  
Mesh Size ◽  
Vertical Axis ◽  
Numerical Approach ◽  
Implant Design ◽  
Hip Joints ◽  
Central Processing ◽  
Element Size ◽  
Artificial Hip Joints ◽  
Human Joints

AbstractHip joint is an important human joints system. The damaged hip joints need to be replaced with artificial hip joints. The Study of the hip joint is very costly therefore another calculation method is demanded to produce good result in acceptable time and cost. Considering this problem, a series of study to assess hip joint performance is conducted using numerical approach. Important parameter for example applied materials are used in the modelling by idealizing Ti-6Al-4V compared to SS 316 L, and stemlengthwas chosen to be 128 mm. ANSYS software was used to analyze models, and designed element size variations were set to be in range 1 to 2.5 mm. The magnitude of force was placed on the femoral head with an angle of 16∘C from the vertical axis. Results showed that SS 316 L material has smaller deformation than Ti material. Whereas Central Processing (CP) time decreases in increasing element size for both materials. In addition, more variations in mesh size are needed to get more accurate convergent results.

Correction of Posture Deviations in the Sagittal Plane Using the Pilates Method

2019 ◽  
pp. 3-13
Author(s):  
Alexandru Cîtea ◽  
George-Sebastian Iacob
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Postural Control ◽  
Human Body ◽  
Sagittal Plane ◽  
The Body ◽  
Lower Limbs ◽  
Low Back ◽  
Pilates Method ◽  
The Relationship

Posture is commonly perceived as the relationship between the segments of the human body upright. Certain parts of the body such as the cephalic extremity, neck, torso, upper and lower limbs are involved in the final posture of the body. Musculoskeletal instabilities and reduced postural control lead to the installation of nonstructural posture deviations in all 3 anatomical planes. When we talk about the sagittal plane, it was concluded that there are 4 main types of posture deviation: hyperlordotic posture, kyphotic posture, rectitude and "sway-back" posture.Pilates method has become in the last decade a much more popular formof exercise used in rehabilitation. The Pilates method is frequently prescribed to people with low back pain due to their orientation on the stabilizing muscles of the pelvis. Pilates exercise is thus theorized to help reactivate the muscles and, by doingso, increases lumbar support, reduces pain, and improves body alignment.

Kinematic Coordination in Human Gait: Relation to Mechanical Energy Cost

1998 ◽  
Vol 79 (4) ◽  
pp. 2155-2170 ◽  
Author(s):  
L. Bianchi ◽  
D. Angelini ◽  
G. P. Orani ◽  
F. Lacquaniti
Keyword(s):  
Energy Expenditure ◽  
Energy Cost ◽  
Time Course ◽  
Sagittal Plane ◽  
Dimensional Space ◽  
Mechanical Energy ◽  
Direction Cosine ◽  
Lower Limbs ◽  
Human Gait ◽  
Plane Orientation

Bianchi, L., D. Angelini, G. P. Orani, and F. Lacquaniti. Kinematic coordination in human gait: relation to mechanical energy cost. J. Neurophysiol. 79: 2155–2170, 1998. Twenty-four subjects walked at different, freely chosen speeds ( V) ranging from 0.4 to 2.6 m s−1, while the motion and the ground reaction forces were recorded in three-dimensional space. We considered the time course of the changes of the angles of elevation of the trunk, pelvis, thigh, shank, and foot in the sagittal plane. These angles specify the orientation of each segment with respect to the vertical and to the direction of forward progression. The changes of the trunk and pelvis angles are of limited amplitude and reflect the dynamics of both right and left lower limbs. The changes of the thigh, shank, and foot elevation are ample, and they are coupled tightly among each other. When these angles are plotted one versus the others, they describe regular loops constrained on a plane. The plane of angular covariation rotates, slightly but systematically, along the long axis of the gait loop with increasing V. The rotation, quantified by the change of the direction cosine of the normal to the plane with the thigh axis ( u 3 t ), is related to a progressive phase shift between the foot elevation and the shank elevation with increasing V. As a next step in the analysis, we computed the mass-specific mean absolute power ( P u ) to obtain a global estimate of the rate at which mechanical work is performed during the gait cycle. When plotted on logarithmic coordinates, P u increases linearly with V. The slope of this relationship varies considerably across subjects, spanning a threefold range. We found that, at any given V > 1 m s−1, the value of the plane orientation ( u 3 t ) is correlated with the corresponding value of the net mechanical power ( P u ). On the average, the progressive rotation of the plane with increasing V is associated with a reduction of the increment of P u that would occur if u 3 t remained constant at the value characteristic of low V. The specific orientation of the plane at any given speed is not the same in all subjects, but there is an orderly shift of the plane orientation that correlates with the net power expended by each subject. In general, smaller values of u 3 t tend to be associated with smaller values of P u and vice versa. We conclude that the parametric tuning of the plane of angular covariation is a reliable predictor of the mechanical energy expenditure of each subject and could be used by the nervous system for limiting the overall energy expenditure.

The Effect of Tibiotalar Fixation on Foot Biomechanics

1997 ◽  
Vol 18 (12) ◽  
pp. 792-797 ◽  
Author(s):  
Jennifer S. Wayne ◽  
Keith W. Lawhorn ◽  
Kenneth E. Davis ◽  
Karanvir Prakash ◽  
Robert S. Adelaar
Keyword(s):  
Subtalar Joint ◽  
Sagittal Plane ◽  
Lower Limbs ◽  
Coronal Plane ◽  
Neutral Position ◽  
Talonavicular Joint ◽  
Tibiotalar Joint ◽  
Contact Areas ◽  
Joint Contact ◽  
Peak Pressures

Contact areas and peak pressures in the posterior facet of the subtalar and the talonavicular joints were measured in cadaver lower limbs for both the normal limb and after fixation of the tibiotalar joint. Six joints were fixed in neutral, in 5–7° of varus and of valgus. Ten degrees of equinus angulation was also studied. Each position of fixation was tested independently. Neutral was defined as fixation without coronal or sagittal plane angulation compared with prefixation alignment of the specimen. When compared with normal unfused condition, peak pressures increased, and contact areas decreased in the subtalar joint for specimens fixed in neutral, varus, and valgus. However, the change in peak pressure for neutral fusion compared with normal control was not statistically significant ( P > 0.07). Peak pressures for varus and valgus fixation were significantly different from normal ( P < 0.001). Contact areas for all positions of fixation were significantly different from normal ( P < 0.001). Coronal plane angulation, however, also resulted in significantly lower contact areas compared with neutral fixation ( P < 0.001). Contact areas and peak pressures in the talonavicular joint did not appear to be substantially affected by tibiotalar fixation with coronal plane angulation. Equinus fixation qualitatively increased contact areas and peak pressures in the talonavicular and posterior facet of the subtalar joint. Neutral alignment of the tibiotalar joint in the coronal and sagittal planes altered subtalar and talonavicular joint contact characteristics the least compared with normal controls. Therefore, ankle fusion in the neutral position would be expected to most closely preserve normal joint biomechanics and may limit the progression of degenerative arthrosis of the subtalar joint.

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