Static weight-bearing patterns of below-knee amputees using patellar-tendon-bearing prostheses.
TL;DR: This paper describes an investigation where a system composed of strain gauge load cells has been employed to study the static weight-bearing patterns of a group fo below-knee amputees using patellar-tendon-bearing prostheses, and of a matching group of normal persons.
About: This article is published in Journal of Biomedical Engineering.The article was published on 1982-01-01. It has received 5 citations till now.
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TL;DR: It was concluded that clinical gait training may utilise SWB as a guide to an amputees' prosthetic weight bearing tolerance and requirements during walking.
Abstract: The purpose of this study was to compare prosthetic weight-bearing tolerance in the standing position to the dynamic vertical ground reaction forces (VGRF) experienced during walking in elderly dysvascular trans-tibial amputees. Ten unilateral trans-tibial amputees attending an amputee clinic (mean age =67±6.5 years) were selected as subjects. Selection criteria were the level of amputation, age, medical fitness to participate and informed consent. Each participant completed five trials of standing (static) weight bearing measurement followed by 10 walking (dynamic) trials on a 10m level walkway, five trials for each limb. Static weight bearing (SWB) was measured using standard bathroom scales. Dynamic weight bearing (DWB) was measured during gait using a Kistler multichannel force platform. T-tests for dependent means indicated that the forces borne in prosthetic single limb stance (mean=0.97±0.03 times body weight (BW)) were significantly lower than the forces borne by the prosthetic limb during the fir...
25 citations
Additional excerpts
...Instrumentation has included strain gauges (Tibarewala and Ganguli, 1982), shoeborne load cells (Lord and Smith, 1984; Ranu and Eng, 1987), force platforms (Hurley et al, 1990; Hermodsson et al., 1994; Thorburn et al, 1990), and bathroom scales (Stolov et al., 1971)....
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TL;DR: The correlation between this index and the physiological energy expenditure associated with the erect standing posture is described and can be conveniently used for evaluation of the functional status of the human lower extremity system in stance.
Abstract: The deviation of the static weight-bearing patterns under the feet of a lower extremity handicapped person may be measured quantitatively in terms of the Static Weight-Bearing Index. This paper describes the correlation between this index and the physiological energy expenditure associated with the erect standing posture. The Static Weight-Bearing Index can be conveniently used for evaluation of the functional status of the human lower extremity system in stance in case of lower extremity disabled persons who maintain basic weight-bearing mode involving both the limbs in double support condition.
2 citations
Cites background from "Static weight-bearing patterns of b..."
...…have been investigated upon using different techniques to correlate the variations in such patterns with the stance disability of these patients (Shambes and Waterland, 1970; Chodera and Sharma, 1977; Chodera and Cterceteko, 1979; Staros, 1965; Ghosh et al., 1979; Tibarewala and Ganguli, 1982)....
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...Further, SWB index for a particular pattern is the root-mean-square deviation of the set of numbers representing the mean normal pattern (Tibarewala and Ganguli, 1982)....
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13 Dec 2017
TL;DR: It is verified that with the use of technological resources in the area of rehabilitation of amputees can perform objectively the static alignment of transtibial prostheses.
Abstract: The most used rehabilitation methods for people with amputation is the prosthesis. A transtibial prosthesis is an artificial limb that replaces a leg missing below the knee. To achieve the proper fit between the prosthesis and the person, the alignment of the prosthesis is performed, this will allow the amputee subject to have stability, comfort, adequate distribution of forces and moments, ipsi and contralateral equality, among others. Static alignment tends to be subjective, it is performed in an observational manner by experts in the field. The present investigation shows a proposal to perform the static alignment in an objective way, based on the distribution of pressure on the plantar surface and the location of the Pressure Center COP). With the use of machine learning systems, such as the vector support machine (SVM), and the named biomechanical variables, a computational tool was generated that shows if there is alignment of the prosthesis. A yield close to 100% was obtained with the proposed model. It is verified that with the use of technological resources in the area of rehabilitation of amputees can perform objectively the static alignment of transtibial prostheses.
2 citations
Cites background from "Static weight-bearing patterns of b..."
...Los estudios en alineación estática son reducidos, a pesar de que esta es primordial en el proceso de rehabilitación [22]....
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13 May 2017
TL;DR: In this article, a modelo computacional for alineacion estatica de protesis transtibiales is presented, based on data from the Centro de Presion (COP) and distribucion de presion plantar in amputados medidos in el Servicio de Amputados and Protesis del Hospital Militar Central, Bogota, Colombia.
Abstract: El proceso complejo de la alineacion en las protesis y la no existencia de un modelo predictivo para alineacion estatica de protesis transtibiales es el foco de esta investigacion. Objetivo: Obtener un modelo computacional que permita establecer la existencia de la alineacion estatica de protesis transtibiales a traves de parametros cineticos presentes en amputados transtibiales unilaterales. Metodos: Se realizo la construccion de una base de datos de valores de Centro de Presion (COP) y distribucion de presion plantar en amputados medidos en el Servicio de Amputados y Protesis del Hospital Militar Central, Bogota, Colombia. Los datos incluyen valores cineticos medidos con la protesis en alineacion y en desalineacion. Resultados: Se desarrollaron tres modelos computacionales, una red neuronal, una maquina de soporte vectorial y un arbol de decision, se realizo la comparacion del desempeno de los modelos. Conclusiones: Los modelos que hacen uso de maquinas de soporte vectorial y de arboles de decision tuvieron mayor desempeno que la red neuronal. De esta forma, se comprueba que la alineacion estatica se puede llevar a cabo de forma objetiva empleando recursos tecnologicos. Palabras clave: alineacion de protesis, rehabilitacion medica, modelo de simulacion.
2 citations
Cites background from "Static weight-bearing patterns of b..."
...cu 5 adaptación exitosa, se tiene un bajo número de estudios que se enfocan en ella (19), adicional no se tiene un modelo predictivo que permita pronosticar la existencia de este tipo de alineación en prótesis transtibiales....
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TL;DR: The unilateral transtibial amputees who were trained with modular PTB prosthesis along with stump exercises group patient's Fz-force in newton (VGRF) has increased drastically compared with conventional PTB artificial limb prosthesis.
Abstract: Background : Proper prescription of prosthetic device and potential rehabilitation increases the quality of life for subjects with amputations. Objective : To compare the effect of vertical ground reaction force (Fz) on unilateral Transtibial amputees those who are using conventional and modular patellar tendon bearing (PTB) prosthesis with stump exercises. Material and Methodology : A sample of 120 persons with below knee amputees who were trained to wear prosthesis were studied with an comparative follow up study design with purposive sampling technique. The 120 adult amputee patients were divided in to two groups having 60 samples in each group, group A patients were given conventional patellar tendon bearing (PTB) prosthesis with intensive stump exercises and group B patients were given modular PTB prosthesis with intensive stump exercises respectively. Data analyzed statistically. Results : The unilateral transtibial amputees who trained with modular prosthesis along with stump exercises group patients Fz-force in newton were increased as compared to the unilateral transtibial amputees who were trained with conventional PTB prosthesis along with stump exercises. There was no significant difference seen in both the groups while giving stump exercises alone. Conclusion : The unilateral transtibial amputees who were trained with modular PTB prosthesis along with stump exercises group patient's Fz-force in newton (VGRF) has increased drastically compared with conventional PTB prosthesis.
1 citations
Cites result from "Static weight-bearing patterns of b..."
...[30] The results showed that stride length of young amputee was 36% greater than elderly and a statistical significant difference was found (P<0....
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References
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TL;DR: The adoption of the concept that fundamentally locomotion is the translation of the center of gravity through space along a pathway requiring the least expenditure of energy supplies the necessary unifying principle which permits of qualitative analysis in terms of the essential determinants of gait.
Abstract: Human locomotion is a phenomenon of the most extraordinary complexity in which so great are the multitude of individual motions occurring simultaneously in the three planes of space that analysis is difficult without some unifying principle. The adoption of the concept that fundamentally locomotion is the translation of the center of gravity through space along a pathway requiring the least expenditure of energy supplies the necessary unifying principle which permits of qualitative analysis in terms of the essential determinants of gait. The six major determinants are pelvic rotation, pelvic tilt, knee and hip flexion, knee and ankle interaction, and lateral pelvic displacement. The serial observations of irregularities in these determinants provides insight into individual variation and a dynamic assessment of pathological gait. Pathological gait may be viewed as an attempt to preserve as low a level of energy consumption as possible by exaggerations of the motions at unaffected levels. Compensation is reasonably effective with the loss of one determinant of which that at the knee is the most costly. Loss of two determinants makes effective compensation impossible and the cost of locomotion in terms of energy is increased threefold with an inevitable drain upon the body economy.
1,204 citations
TL;DR: Walking and running on the level involves external mechanical work, even when speed averaged over a complete stride remains constant, which must be performed by the muscles to accelerate and/or raise the center of mass of the body during parts of the stride.
Abstract: Walking and running on the level involves external mechanical work, even when speed averaged over a complete stride remains constant. This work must be performed by the muscles to accelerate and/or raise the center of mass of the body during parts of the stride, replacing energy which is lost as the body slows and/or falls during other parts of the stride. External work can be measured with fair approximation by means of a force plate, which records the horizontal and vertical components of the resultant force applied by the body to the ground over a complete stride. The horizontal force and the vertical force minus the body weight are integrated electronically to determine the instantaneous velocity in each plane. These velocities are squared and multiplied by one-half the mass to yield the instantaneous kinetic energy. The change in potential energy is calculated by integrating vertical velocity as a function of time to yield vertical displacement and multiplying this by body weight. The total mechanical energy as a function of time is obtained by adding the instantaneous kinetic and potential energies. The positive external mechanical work is obtained by adding the increments in total mechanical energy over an integral number of strides.
609 citations
169 citations
158 citations
TL;DR: A new method and instrument developed by the authors allows a simultaneous recording of the pressure distribution between each foot and the ground during either standing or walking, which may yield important data for the evaluation of prosthetic-orthotic appliances, in post-operative follow-up of orthopedic patients, and in the mechanics of rehabilitation.
97 citations