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Development and validation of a system for clinical assessment of gait cycle parameter in patients with idiopathic normal pressure hydocephalus
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
2013 (English)Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesisAlternative title
Utveckling och validering av ett system för klinisk bedömning av gångcykelns parametrar hos patienter med idiopatisk normaltrycks hydrocephalus (Swedish)
Abstract [en]

A number of parameters have been identified as characteristic of the walking pattern in patients with INPH. Most of these have been identified through qualitative surveys and manually conducted test batteries. In order to obtain quantitative, standardized and objective measures, which enable studies based on larger patient populations and comparable results, there is a need for a user-friendly system that can measure specific key parameters over time in a reliable manner in everyday clinical work. Step height, width and the variability in the gait cycle are such parameters which are interesting research areas for this group of patient.

Problems with balance and gait are very common in other patient groups as well, particularly in neurological diseases such as Parkinson's disease, multiple sclerosis and stroke.

This is the reason that the development of this gait analyzer is performed. Giving access to a simple and objective method for estimating gait and balance ability in clinical routine investigations would increase the ability to provide the right kind of treatment, confirm treatment results, and conducting larger research studies. Therefore, this equipment can contribute to the assessment of diseases which contain impaired gait. As a first test of the usability and for the validation of accuracy and repeatability of the equipment a group of healthy volunteers was used. Results from tests on healthy subjects show god repeatability between measurements, for step width at normal gait the difference was -0,2 ±0,34 cm (mean, ±SD) and step height 0,69 ±3,34 cm. The stride time variability in the healthy group where very small 0,00048 ±0,00028 s2 with a difference between test of 0,000019 ±0,00038 s2. Three pilot patients have been tested where we have clearly seen indications of increased stride time variability and reduced step height.

Place, publisher, year, edition, pages
2013. , 24 p.
Keyword [en]
stride time variability, step height, step width, gait parameters, inertial sensor, optical distance sensor
National Category
Medical Engineering
URN: urn:nbn:se:umu:diva-82891OAI: diva2:663795
External cooperation
Norrlands Universitetssjukhus, CMTS, MT-FoU
Subject / course
Educational program
Bachelor of Science in Applied Electronics
2013-12-17, NUS, CMTS bibliotek, 90185 Umeå, 09:00 (Swedish)
Available from: 2013-11-22 Created: 2013-11-13 Last updated: 2013-11-22Bibliographically approved

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Utveckling och validering av ett system för klinisk bedömning av gångcykelns parametrar hos patienter med idiopatisk normaltrycks hydrocephalus(4200 kB)196 downloads
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