Lower limb amputation Part 3

Cochrane, H.; Orsi, Kelly Cristina Sbampato Calado; Reilly, Peter

doi:10.1080/03093640108726564

Cited by 47 publications

(28 citation statements)

References 33 publications

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“…However, these changes have not been detected consistently by contemporary measures and instruments. [1][2][3][4] From the results of this study, it appears that the SEW measure could be used as a clinical tool to distinguish gait variations among prosthetic feet and document the clinically relevant differences. With this measure, limited instrumentation is attached to the patient who is simply asked to walk for 10-20 sec with in-sole sensors.…”

Section: Discussionmentioning

confidence: 99%

“…Results from these studies have been described in recent review articles. [1][2][3][4] Some authors have found significant differences in gait characteristics among prosthetic feet, while others have found contradictory results. [1][2][3][4] Conventional experimental measures, such as energy cost, EMG, walking speed etc., have failed to consistently demonstrate variations in gait between prosthetic feet.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4] Some authors have found significant differences in gait characteristics among prosthetic feet, while others have found contradictory results. [1][2][3][4] Conventional experimental measures, such as energy cost, EMG, walking speed etc., have failed to consistently demonstrate variations in gait between prosthetic feet. 5,6 Clinically, differences in gait may be subjectively observed by the clinician and sensed by the patient, but instrumented gait analysis may not always confirm the expected differences with objective data.…”

Section: Introductionmentioning

confidence: 99%

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Symmetry in External Work (SEW)

Agrawal

Gailey

O’Toole

et al. 2009

Prosthetics &Amp; Orthotics International

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Unilateral transtibial amputees (TTAs) show subtle gait variations while using different prosthetic feet. These variations have not been detected consistently with previous experimental measures. We introduce a novel measure called Symmetry in External Work (SEW) for quantifying kinetic gait differences between prosthetic feet. External work is the result of changes in kinetic and potential energy of body center of mass (CoM). SEW is computed by integrating vertical ground reaction forces obtained using F-scan in-sole sensors. Since various prosthetic feet have different designs, we hypothesized that SEW will vary with the type of foot used. This hypothesis was tested with a single unilateral TTA using four prosthetic feet (Proprio, Triasþ, Seattle Lite and SACH). The Proprio (mean symmetry 94.5% + 1.1%) and the Triasþ (92.1% + 2.5%) feet exhibited higher symmetry between the intact and prosthetic limbs, as compared to the Seattle (67.8% + 19.3%) and SACH (35.7% + 11.1%) feet. There was also a good agreement in vertical CoM excursion between the intact foot and prosthetic feet with heel-toe foot plate designs. Results indicate that SEW measure may be a viable method to detect kinetic differences between prosthetic feet and could have clinical applications because of relatively low cost instrumentation and minimal subject intervention.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Symmetry in External Work (SEW)

Agrawal

Gailey

O’Toole

et al. 2009

Prosthetics &Amp; Orthotics International

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“…The second point that was interesting in our case was the identification of possible dermal complications that can be faced by a patient with a lower limb prosthesis. Despite advances in technology and design, a number of problems have been seen to occur with use of prosthetic limbs [7][8]. The most important factor is the way the prosthesis fits with the residual limb.…”

Section: Letter To the Editormentioning

confidence: 99%

Thalidomide-induced phocomelia: “An old wound that still hurts”

Perdikakis¹

2012

Open Medicine

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“…However, these articles focused mostly on fabrication techniques; no material properties were investigated [7][8][9]. The only publicly available thermoplastic material properties found were those gathered from product information sheets.…”

Section: Introductionmentioning

confidence: 99%

Tensile strength and impact resistance properties of materials used in prosthetic check sockets, copolymer sockets, and definitive laminated sockets

Gerschutz

Haynes²,

Nixon³

et al. 2011

JRRD

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Abstract-Prosthetic sockets serve as the interface between people with amputations and their prostheses. Although most materials used to make prosthetic sockets have been used for many years, knowledge of these materials' properties is limited, especially after they are subjected to fabrication processes. This study evaluated tensile and impact properties of the current state-of-the-art materials used to fabricate prosthetic check sockets, copolymer sockets, and definitive laminated sockets. Thermolyn Rigid and Orfitrans Stiff check socket materials produced significantly lower tensile strength and impact resistance than polyethylene terephthalate glycol (PETG). Copolymer socket materials exhibited greater resistance to impact forces than the check socket materials but lower tensile strengths than PETG. The heated molding processes, for the check socket and copolymer materials, reduced both tensile strength and elongation at break. Definitive laminated sockets were sorted according to fabrication techniques. Nyglass material had significantly higher elongation, indicating a more ductile material than carbon-based laminations. Carbon sockets with pigmented resin had higher tensile strength and modulus at break than nonpigmented carbon sockets. Elongation at yield and elongation at break were similar for both types of carbonbased laminations. The material properties determined in this study provide a foundation for understanding and improving the quality of prosthetic sockets using current fabrication materials and a basis for evaluating future technologies.

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Lower limb amputation Part 3

Abstract: This paper is intended as a follow-up to the ISPO Consensus Conference on Amputation Surgery. It reviews all the literature on lower limb prosthetics published after 1990. The review was considered under six categories: feet, knees, hips, thermoplastics, liners/suspension and computers.

Cited by 47 publications

References 33 publications

Symmetry in External Work (SEW)

Symmetry in External Work (SEW)

Thalidomide-induced phocomelia: “An old wound that still hurts”

Tensile strength and impact resistance properties of materials used in prosthetic check sockets, copolymer sockets, and definitive laminated sockets

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