An application of the Dempster–Shafer theory of evidence to the classification of knee function and detection of improvement due to total knee replacement surgery

Jones, Llewelyn; Beynon, Malcolm James; Holt, Catherine Avril; Roy, Stuart

doi:10.1016/j.jbiomech.2005.07.024

Cited by 45 publications

(45 citation statements)

References 15 publications

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“…The measurement of gait in knee OA is challenging, and principal component analysis has been used before to extract and summarise the most useful information from waveforms [14], [15], [16]. However, variables taken individually often fail to adequately describe the functional performance of gait, whereas a combination of multiple pieces of data available in a gait analysis can provide a much more comprehensive assessment [13], [16].…”

Section: Introductionmentioning

confidence: 99%

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Abnormal loading and functional deficits are present in both limbs before and after unilateral knee arthroplasty

Metcalfe¹,

Stewart²,

Postans³

et al. 2017

Gait & Posture

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HighlightsJoint loading and function was assessed bilaterally in unilateral knee OA.Gait data can be summarised using a functional classification approach.Gait abnormailities in knee OA and following arthroplasty are relatively symmetrical.Joint loading and function frequently remains abnormal following arthroplasty.Pre-operative function (the Cardiff Classifier) can predict post-operative function.

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Section: Introductionmentioning

confidence: 99%

“…However, variables taken individually often fail to adequately describe the functional performance of gait, whereas a combination of multiple pieces of data available in a gait analysis can provide a much more comprehensive assessment [13], [16].…”

Section: Introductionmentioning

confidence: 99%

Abnormal loading and functional deficits are present in both limbs before and after unilateral knee arthroplasty

Metcalfe¹,

Stewart²,

Postans³

et al. 2017

Gait & Posture

View full text Add to dashboard Cite

show abstract

“…The current work describes a statistical analysis to determine variables that highlight significant functional differences between the two surgical approaches and also between the operated and non-pathological hip within each surgical cohort. It then explores the use of these variables as inputs for classification, using a method [14] based on the Dempster-Shafer theory (DST) of evidence, to characterize operated and non-pathological hip function. This method objectively analyses the mass of conflicting and corroborating data, removing the need for subjective interpretation.…”

Section: Introductionmentioning

confidence: 99%

Objective functional assessment of total hip arthroplasty following two common surgical approaches: The posterior and direct lateral approaches

Whatling

Dabke

Holt

et al. 2008

Proc Inst Mech Eng H

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Despite the high number of total hip arthroplasty (THA) procedures performed each year, there is no common consensus on the best surgical approach. Gait is known to improve following THA although it does not return to what is typically quantified as normal, and surgical approach is believed to be a contributing factor. The current study evaluates postoperative hip function and provides an objective assessment following two common surgical approaches: the McFarland-Osborne direct lateral and the southern posterior. Faced with the common problem of providing an objective comparison from the wealth of data collected using motion analysis techniques, the current study investigates the application of an objective classification tool to provide information on the effectiveness of each surgery and to differentiate between the characteristics of hip function following the two approaches. Seven inputs for the classifier were determined through statistical analysis of the biomechanical data. The posterior approach group exhibited greater characteristics of non-pathological gait and displayed a greater range of functional ability as compared with the lateral approach cohort. The classification tool has proved to be successful in characterizing non-pathological and THA function but was insufficient in distinguishing between the two surgical cohorts.

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“…This has become evident when communicating the method and results across a wide spectrum of disciplines as the method has been well received by engineers, mathematicians, physiotherapists, and orthopaedic surgeons [19,20,23,24].…”

Section: Simplicity Of the Diagnostic Toolmentioning

confidence: 99%

An objective tool for assessing the outcome of total knee replacement surgery

Jones

Holt

2008

Proc Inst Mech Eng H

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Abstract:The need for an objective tool to assess the outcome of total knee replacement (TKR) surgery is widely recognized. This study investigates the potential of an objective diagnostic tool for assessing the outcome of TKR surgery based on motion analysis techniques. The diagnostic tool has two main elements: collection of data using motion analysis, and the assessment of knee function using a classifier that is based around the Dempster-Shafer theory of evidence. The tool was used to analyse the knee function of nine TKR subjects preoperatively and at three stages post-operatively. Using important measurable characteristics of the knee, the tool was able to establish the level of benefit achieved by surgery and to enable a comparison of subjects. No subject recovered normal knee function following TKR surgery. This has important implications for knee implant designs.

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An application of the Dempster–Shafer theory of evidence to the classification of knee function and detection of improvement due to total knee replacement surgery

Cited by 45 publications

References 15 publications

Abnormal loading and functional deficits are present in both limbs before and after unilateral knee arthroplasty

Abnormal loading and functional deficits are present in both limbs before and after unilateral knee arthroplasty

Objective functional assessment of total hip arthroplasty following two common surgical approaches: The posterior and direct lateral approaches

An objective tool for assessing the outcome of total knee replacement surgery

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