Development and Preliminary Testing of a Device for the Direct Measurement of Forces and Moments in the Prosthetic Limb of Transfemoral Amputees during Activities of Daily Living

Frossard, Laurent; Beck, Jim; Dillon, Michael P.; Evans, John H.

doi:10.1097/00008526-200310000-00005

Cited by 67 publications

(71 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, portable kinetic systems based on a multi-axial transducer connected to a recording device were used to measure the load applied on the residuum of individuals with lower-limb amputation [31][32]. To date, studies of the load applied on the osseointegrated fixation of TFAs focused only on the effects of load-bearing exercises [8], walking aids [33], walking [34], standardized ADLs [35], ADLs in open environment [36][37], and falls [9][10].…”

Section: Characterization Based On Direct Kinetic  Measurementsmentioning

confidence: 99%

“…The load was measured and recorded at 200 Hz using a multi-axial transducer and a laptop computer [8][9][10]28,[32][33][34][35][36]41]. The three components of forces and moments were measured with accuracy better than 1 N and 1 Nm, respectively.…”

Section: Apparatusmentioning

confidence: 99%

“…Each session occurred according to protocol previously published [32,[34][35], including the following key steps.…”

Section: Recordingmentioning

confidence: 99%

“…The raw data for each trial was imported into a customized MATLAB software program (MathWorks Inc; Natick, Massachusetts), implementing the following data processing steps [32,[34][35]:…”

Section: Processingmentioning

confidence: 99%

See 3 more Smart Citations

Load applied on bone-anchored transfemoral prosthesis: Characterization of a prosthesis� A pilot study

Frossard¹,

Häggström²,

Hagberg³

et al. 2013

JRRD

Self Cite

View full text Add to dashboard Cite

Abstract-The objectives of this study were to (1) record the inner-prosthesis loading during activities of daily living (ADLs), (2) present a set of variables comparing loading data, and (3) provide an example of characterization of two prostheses. The load was measured at 200 Hz using a multi-axial transducer mounted between the residuum and the knee of an individual with unilateral transfemoral amputation fitted with a bone-anchored prosthesis. The load was measured while using two different prosthetic knees, mechanical (PRO1) and microprocessor-controlled (PRO2), during six ADLs. The characterization of the prostheses was achieved using a set of variables split into four categories, including temporal characteristics, maximum loading, loading slopes, and impulse. Approximately 360 gait cycles were analyzed for each prosthesis. PRO1 showed a cadence improved by 19% and 7%, a maximum force on the long axis reduced by 11% and 19%, and an impulse reduced by 32% and 15% during descent of incline and stairs compared with PRO2, respectively. This work confirmed that the proposed apparatus and characterization can reveal how changes of prosthetic components are translated into inner-prosthetic loading.

show abstract

Section: Characterization Based On Direct Kinetic  Measurementsmentioning

confidence: 99%

Section: Apparatusmentioning

confidence: 99%

“…Each session occurred according to protocol previously published [32,[34][35], including the following key steps.…”

Section: Recordingmentioning

confidence: 99%

“…The raw data for each trial was imported into a customized MATLAB software program (MathWorks Inc; Natick, Massachusetts), implementing the following data processing steps [32,[34][35]:…”

Section: Processingmentioning

confidence: 99%

See 2 more Smart Citations

Load applied on bone-anchored transfemoral prosthesis: Characterization of a prosthesis� A pilot study

Frossard¹,

Häggström²,

Hagberg³

et al. 2013

JRRD

Self Cite

View full text Add to dashboard Cite

show abstract

“…• The efficacy of the algorithm that is implemented by the control circuit to detect automatically the time of descent using some sensors (e.g., accelerometers (18)(19)(20)(21)(22)(23) , gyroscope (21,(24)(25) , load (26) ) (18,20,24,(27)(28)(29) . Here, the term "time of descent" is defined as the moment when the amputees cease to have control over their movements leading their body to hit the ground.…”

Section: 2mentioning

confidence: 99%

Load on Osseointegrated Fixation of a Transfemoral Amputee during a Fall

Frossard

2010

Prosthetics &Amp; Orthotics International

View full text Add to dashboard Cite

Mitigation of fall-related injuries for populations of transfemoral amputees fitted with a socket or an osseointegrated fixation is challenging. Wearing a protective device fitted within the prosthesis might be a possible solution, provided that issues with automated fall detection and time of deployment of the protective mechanism are solved. The first objective of this study was to give some examples of the times and durations of descent during a real forward fall of a transfemoral amputee that occurred inadvertently while attending a gait measurement session to assess the load applied on the residuum. The second objective was to present five semi-automated methods of detection of the time of descent using the load data. The load was measured directly at 200 Hz using a six-channel transducer. The average time and duration of descent were 242±42 ms [145 ms-310 ms] and 619±42 ms [550 ms -715 ms], respectively. This study demonstrated that the transition between walking and falling was characterised by times of descent that occurred sequentially. The sensitivity and specificity of an automated algorithm might be improved by combining several methods of detection based on the deviation of the loads measured from their own trends and from a template previously established.

show abstract

Finite Element Modeling to Aid in Refining the Rehabilitation of Amputees Using Osseointegrated Prostheses

Lee

Frossard

Cairns

et al. 2007

Digital Human Modeling

Self Cite

View full text Add to dashboard Cite

The direct anchorage of a lower-limb prosthesis to the bone has been shown to be an excellent alternative for amputees experiencing complications in using a conventional prosthetic socket. After surgical implantation, amputees have to go through a weight bearing exercise program to prepare the bone to tolerate forces and promote bone-remodeling. Currently, the load magnitude prescribed by the clinician is measured by a weight scale which reports only the axial force in the limb. Previous study using a load transducer revealed that in addition to the axial force there were other forces and moments. This study develops a FE model and utilizes our load data to investigate the stress distribution at the bone-implant interface. The model shows that the stress distribution could be highly non-uniform during the exercise. Bone-implant interface stress has certain implications in pain adaptation and boneremodeling, and a good understanding of it can assist in future attempts to refine and shorten the period of rehabilitation exercise.

show abstract

Development and Preliminary Testing of a Device for the Direct Measurement of Forces and Moments in the Prosthetic Limb of Transfemoral Amputees during Activities of Daily Living

Cited by 67 publications

References 9 publications

Load applied on bone-anchored transfemoral prosthesis: Characterization of a prosthesis� A pilot study

Load applied on bone-anchored transfemoral prosthesis: Characterization of a prosthesis� A pilot study

Load on Osseointegrated Fixation of a Transfemoral Amputee during a Fall

Finite Element Modeling to Aid in Refining the Rehabilitation of Amputees Using Osseointegrated Prostheses

Contact Info

Product

Resources

About