Browsing by Author "Du Toit, Jacques"

Now showing 1 - 6 of 6
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    Ageing with Cerebral Palsy after being treated with Orthopaedic Interval Surgery Approach during childhood
    (Stellenbosch : Stellenbosch University., 2020-03) Du Toit, Jacques; Lamberts, Robert P.; Langerak, Nelleke G.; Stellenbosch University. Faculty of Health Sciences. Dept. of Surgical Sciences: Orthopaedic Surgery.
    ENGLISH ABSTRACT: No abstract available.
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    Cerebral palsy care in South Africa : a paradigm shift
    (South African Orthopaedic Association, 2019) Du Toit, Jacques
    ENGLISH ABSTRACT: The word ‘paradigm’, derived from the Greek paradeigma, refers to a ‘framework’ or ‘a very clear and typical example of something’.¹ A paradigm shift thus signifies a change in the demand for certain competencies and/or expertise within a specific framework. This certainly applies to patients affected by cerebral palsy (CP) in a developed world context. The domain of childhood CP has entered a new paradigm which entails significant changes regarding patient profile, treatment approach, outcomes and expectations. After an initially slow uptake, the developed world has now successfully adjusted to a broader biopsychosocial approach. Most of the developing world, however, still lacks a structured framework with the ability to accommodate and address the needs of this changing cohort of patients.
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    Decision support for threat detection in maritime surveillance
    (Stellenbosch : Stellenbosch University, 2014-12) Du Toit, Jacques; Van Vuuren, Jan Harm; Stellenbosch University. Faculty of Economic and Management Sciences. Dept. of Logistics.
    ENGLISH ABSTRACT: The policing and monitoring of South Africa's coastline and economic exclusion zone is made di cult not only by the size of the area of interest, but also by the limited resources available for maritime detection and policing. As a consequence, illegal activities, such as smuggling, poaching and illegal border crossings, are often conducted with impunity. Conventional approaches to monitoring coastal areas, such as the use of patrol boats, port inspections and aircraft surveillance, may be augmented by advances in technology that are steadily contributing vast amounts of data related to maritime activity. For example, various South African agencies collect auto- matic identi cation system and vessel monitoring system transmissions, and gather additional kinematic data of maritime vessels through a number of strategically placed coastal radars. A command and control centre for actively monitoring these data (outside of the intelligence community) was established by the South African Navy in 2014. Such centres provide surveillance operators with a real-time picture of a maritime region of interest from which they can identify relevant facts of interest through a reliance on experience and domain knowledge. The e ectiveness of this process may, however, be undermined by the vast quantities of data typically under consideration, by the di culty of identifying long-term trends in vessel kinematic behaviour and by the possibility of operator fatigue brought on by the relatively low incidence levels of activities of interest. E ective decision support tools may play a valuable role in this context by the automatic processing of these vast collections of data, by the identi cation of concepts of interest and by the prediction of future occurrences of interest. It is, however, essential that such tools should be exible enough to adapt to changes in typical vessel behaviour over time and that they should be capable of integrating new trends and new types of behaviours. Various approaches to maritime surveillance are investigated in this dissertation from the perspectives of threat detection and anomaly identi cation, with particular emphasis on a systems approach to decision support. A decision support system framework that utilises rule-based and data-driven mechanisms is proposed as a means to separate the interesting from the uninteresting and to provide early warnings of potentially threatening maritime vessel behaviour to operators. This system framework is primarily concerned with kinematic data and is restricted to the identi cation of certain types of activities. Successful classi cation and, ultimately, timely prediction of potentially threatening behaviour would allow for e ective policing by providing early warning to relevant entities, thus potentially leading to more e ective use of available policing resources.
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    The outcome of relapsed and residual clubfeet treated with the Taylor Spatial Frame
    (Stellenbosch : Stellenbosch University, 2014-12) Botha, Adriaan Hendrik; Du Toit, Jacques; Lamberts, Robert P.; Stellenbosch University. Faculty of Medicine and Health Sciences. Dept. of Surgical Sciences. Orthopaedic Surgery
    No abstract available
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    A systematic review of the effects of single- event multilevel surgery on gait parameters in children with spastic cerebral palsy
    (Public Library of Science, 2015) Lamberts, Robert P.; Burger, Marlette; Du Toit, Jacques; Langerak, Nelleke G.
    Background: Three-dimensional gait analysis (3DGA) is commonly used to assess the effect of orthopedic single-event multilevel surgery (SEMLS) in children with spastic cerebral palsy (CP). Purpose: The purpose of this systematic review is to provide an overview of different orthopedic SEMLS interventions and their effects on 3DGA parameters in children with spastic CP. Methods: A comprehensive literature search within six databases revealed 648 records, from which 89 articles were selected for the full-text review and 24 articles (50 studies) included for systematic review. The Oxford Centre for Evidence-Based Medicine Scale and the Methodological Index for Non-Randomized Studies (MINORS) were used to appraise and determine the quality of the studies. Results: Except for one level II study, all studies were graded as level III according to the Oxford Centre for Evidence-Based Medicine Scale. The MINORS score for comparative studies (n = 6) was on average 15.7/24, while non-comparative studies (n = 18) scored on average 9.8/16. Nineteen kinematic and temporal-distance gait parameters were selected, and a majority of studies reported improvements after SEMLS interventions. The largest improvements were seen in knee range of motion, knee flexion at initial contact and minimal knee flexion in stance phase, ankle dorsiflexion at initial contact, maximum dorsiflexion in stance and in swing phase, hip rotation and foot progression angles. However, changes in 3DGA parameters varied based on the focus of the SEMLS intervention. Discussion: The current article provides a novel overview of a variety of SEMLS interventions within different SEMLS focus areas and the post-operative changes in 3DGA parameters. This overview will assist clinicians and researchers as a potential theoretical framework to further improve SEMLS techniques within different SEMLS focus groups. In addition, it can also be used as a tool to enhance communication with parents, although the results of the studies can’t be generalised and a holistic approach is needed when considering SEMLS in a child with spastic CP.
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    A systematic review of the effects of single-event multilevel surgery on gait parameters in children with spastic cerebral palsy
    (Public Library of Science, 2016-10-18) Lamberts, Robert P.; Burger, Marlette; Du Toit, Jacques; Langerak, Nelleke G.
    Background: Three-dimensional gait analysis (3DGA) is commonly used to assess the effect of orthopedic single-event multilevel surgery (SEMLS) in children with spastic cerebral palsy (CP). Purpose: The purpose of this systematic review is to provide an overview of different orthopedic SEMLS interventions and their effects on 3DGA parameters in children with spastic CP. Methods: A comprehensive literature search within six databases revealed 648 records, from which 89 articles were selected for the full-text review and 24 articles (50 studies) included for systematic review. The Oxford Centre for Evidence-Based Medicine Scale and the Methodological Index for Non-Randomized Studies (MINORS) were used to appraise and determine the quality of the studies. Results: Except for one level II study, all studies were graded as level III according to the Oxford Centre for Evidence-Based Medicine Scale. The MINORS score for comparative studies (n = 6) was on average 15.7/24, while non-comparative studies (n = 18) scored on average 9.8/16. Nineteen kinematic and temporal-distance gait parameters were selected, and a majority of studies reported improvements after SEMLS interventions. The largest improvements were seen in knee range of motion, knee flexion at initial contact and minimal knee flexion in stance phase, ankle dorsiflexion at initial contact, maximum dorsiflexion in stance and in swing phase, hip rotation and foot progression angles. However, changes in 3DGA parameters varied based on the focus of the SEMLS intervention. Discussion: The current article provides a novel overview of a variety of SEMLS interventions within different SEMLS focus areas and the post-operative changes in 3DGA parameters. This overview will assist clinicians and researchers as a potential theoretical framework to further improve SEMLS techniques within different SEMLS focus groups. In addition, it can also be used as a tool to enhance communication with parents, although the results of the studies can’t be generalised and a holistic approach is needed when considering SEMLS in a child with spastic CP.