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<div class="csl-entry">Unterholzner, T. J. (2021). <i>Design and implementation of a test stand for in-vivo force measurement on a flexor tendon</i> [Diploma Thesis, Technische Universität Wien]. reposiTUm. https://doi.org/10.34726/hss.2021.80020</div>
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dc.identifier.uri
https://doi.org/10.34726/hss.2021.80020
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/17724
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dc.description
Zusammenfassung in deutscher Sprache
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dc.description
Abweichender Titel nach Übersetzung der Verfasserin/des Verfassers
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dc.description.abstract
Carpal Tunnel Syndrome (CTS) is a compression of the median nerve in the region of the wrist. Symptoms include pain and numbness in the supplied fingers and can greatly restrict affected individuals in their everyday lives. To lower the number of people suffering from CTS, guidelines and ergonomic standards have been established. These currently lack a scientific model considering all influencing factors. A musculoskeletal model, currently developed at the Center for Integrated Neuroscience Tübingen, Germany, simulates all the known risk factors. To verify the model, one important parameter was chosen. This parameter is the contact force between the Flexor Digitorum Superficialis (FDS) III tendon and the surrounding tissue. The aim of this thesis is therefore, to create a test stand which makes it possible to measure the resulting force in an in-vivo situation.The workflow started with planning the construction by creating a list of requirements. Furthermore, a functional model was built to develop a reliable measurement procedure and to correct design errors. In a pilot study the response of electromyographic signal to a range of loads on the FDS III was tested on six probands. Possible designs were constructed and finally the most promising approach was built. Lastly the setup was improved and tested for performance in in-vitro situations.With the final setup one is able to position different angles in the wrist and measure resulting forces with a quickly adjustable force sensor. The in-vitro measurements show good precision and accuracy in lower angles with a Standard Deviation (SD) of 0.15 N at a mean of 3.68 N. For angles at 60° the design of the test measurements led to high transverse forces, which resulted in a deviation from expected results. Measurements with sheep tendons showed stable holding of the tendon with the attached surgical hook and had a good precision. In conclusion it can be said that a solid measurement setup was constructed and tested within the scope of this thesis. The ease of use and simple design not only allow measurements to be taken quickly, but also safely during surgery. Repeatability was improved during different in-vitro tests, which can be seen in a SD decrease from 1.06 N to 0.45 N. Performance in higher angles is to be expected better in in-vivo situations, which will be looked at in the planned cadaveric tests at the BG Clinic Tübingen, as part of the Eberhard Karls Universität Tübingen.
en
dc.language
English
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dc.language.iso
en
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dc.rights.uri
http://rightsstatements.org/vocab/InC/1.0/
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dc.subject
Karpaltunnelsyndrom
de
dc.subject
Kraftmessung
de
dc.subject
Flexor Tendon
de
dc.subject
Kontaktkräfte
de
dc.subject
Carpal tunnel syndrome
en
dc.subject
force measurement
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dc.subject
flexor tendon
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dc.subject
contact forces
en
dc.title
Design and implementation of a test stand for in-vivo force measurement on a flexor tendon
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dc.title.alternative
Design und Umsetzung eines Test-Aufbaus zur in-vivo Kraftmessung an Flexorsehnen
de
dc.type
Thesis
en
dc.type
Hochschulschrift
de
dc.rights.license
In Copyright
en
dc.rights.license
Urheberrechtsschutz
de
dc.identifier.doi
10.34726/hss.2021.80020
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dc.contributor.affiliation
TU Wien, Österreich
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dc.rights.holder
Thomas Josef Unterholzner
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dc.publisher.place
Wien
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tuw.version
vor
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tuw.thesisinformation
Technische Universität Wien
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dc.contributor.assistant
Thurner, Philipp
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tuw.publication.orgunit
E354 - Institute of Electrodynamics, Microwave and Circuit Engineering