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document
Gasparutto, X. (author), van der Graaff, E (author), van der Helm, F.C.T. (author), Veeger, H.E.J. (author)
The purpose of this study was to assess the rotation and translation velocity of the shoulder complex during fastball pitching in baseball. 8 pitchers from the Dutch AAA team performed each 3 fastball pitches. Their motion was recorded by an opto-electronic device. Kinematic computation was performed using the quaternion algebra. The results...
conference paper 2015
document
Smit, G. (author)
Replacement of a missing hand by an artificial alternative remains one of the biggest challenges in rehabilitation. Although many different terminal devices are available, around 27% of the amputees does not actively use their device and 20% totally refrains from wearing it. There are various reasons for prosthesis abandonment, e.g. wearing...
doctoral thesis 2013
document
Smit, G. (author), Plettenburg, D.H. (author)
The Delft Institute of Prosthetics and Orthotics has started a research program to develop an improved voluntary closing, body-powered hand prosthesis. Five commercially available voluntary closing terminal devices were mechanically tested: three hands [Hosmer APRL VC hand, Hosmer Soft VC Male hand, Otto Bock 8K24] and two hooks [Hosmer APRL VC...
journal article 2010
document
Smit, G. (author), Bongers, R.M. (author), Van der Sluis, C.K. (author), Plettenburg, D.H. (author)
Quantitative data on the mechanical performance of upper-limb prostheses are very important in prostheses development and selection. The primary goal of this study was to objectively evaluate the mechanical performance of adult-size voluntary opening (VO) prosthetic terminal devices and select the best tested device. A second goal was to see...
journal article 2012
document
Smit, G. (author), Plettenburg, D.H. (author), Van der Helm, F.C. (author)
The goal of this study was to find an efficient method of energy transmission for application in an anthropomorphic underactuated body-powered (BP) prosthetic hand. A pulley-cable finger and a hydraulic cylinder finger were designed and tested to compare the pulley-cable transmission principle with the hydraulic cylinder transmission principle....
journal article 2014
document
ten Kate, J (author), Smit, G. (author), Breedveld, P. (author)
Goal: This paper aims to provide an overview with quantitative information of existing 3D-printed upper limb prostheses. We will identify the benefits and drawbacks of 3D-printed devices to enable improvement of current devices based on the demands of prostheses users. Methods: A review was performed using Scopus, Web of Science and websites...
journal article 2017
document
Smit, G. (author), Plettenburg, D.H. (author), Van der Helm, F.C.T. (author)
Rejection rates of upper limb prostheses are high (23-45%). Amputees indicate that the highest design priority should be reduction of the mass of the prosthetic device. Despite all efforts, the mass of the new prosthetic hands is 35-73% higher than that of older hands. Furthermore current hands are thicker than a human hand, they operate slower...
journal article 2014
document
Herder, J.L. (author), Vrijlandt, N. (author), Antonides, T. (author), Cloosterman, M. (author), Mastenbroek, P.L. (author)
This article describes the development of a mobile arm support for people with muscular diseases. The arm support is spring-balanced, with special attention on reduction of operating effort (high balancing quality and low friction), functionality (large range of motion), and aesthetics (inconspicuous design). The spring settings can be adjusted...
journal article 2006
document
Smit, G. (author), Plettenburg, D.H. (author)
Current articulating electric and body-powered hands have a lower pinch force (15–34 N) than electric hands with stiff fingers (55–100 N). The cosmetic glove, which covers a hand prosthesis, negatively affects the mechanical efficiency of a prosthesis. The goal of this study is to mechanically compare polyvinylchloride (PVC) and silicone...
journal article 2013
document
Smit, G. (author), Plettenbrug, D.H. (author), Van der Helm, F.C.T. (author)
Background: Cosmetic gloves that cover a prosthetic hand have a parasitic positive stiffness that counteracts the flexion of a finger joint. Objectives: Reducing the required input torque to move a finger of a prosthetic hand by compensating the parasitic stiffness of the cosmetic glove. Study design: Experimental, test bench. Methods: The...
journal article 2014
document
Haverkate, L. (author), Smit, G. (author), Plettenburg, D.H. (author)
Study Design: Experimental trial. Background: The functional performance of currently available body-powered prostheses is unknown. Objective: The goal of this study was to objectively assess and compare the functional performance of three commonly used body-powered upper limb terminal devices. Methods: Twenty-one able-bodied subjects (n=21, age...
journal article 2014
document
Danz, M.H. (author)
In deze skriptie worden resultaten uit de literatuur op het gebied van de mechanische belastbaarheid van de menselijke huid behandeld. Daarbij wordt alleen gekeken naar die belastinggevallen, waarvan verwacht kan worden dat ze bij het dragen van pro- en orthesen zullen voorkomen: drukkracht (eventueel negatief) loodrecht op de huid en...
report 1985
document
Zwart, O. (author)
Onderzocht wordt een eenvoudig principeontwerp voor een kinderpolsprothese,geschikt voor rotatie zowel als flexie, waarbij de belangrijkste 'ontwerpkriteria zijn de eenvoud van bediening en de fabrikagekosten.
report 1978
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