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Single sensor measu...
Single sensor measurement of heel-height during the push-off phase of gait
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- Bäcklund, Tomas, 1958- (författare)
- Umeå universitet,Radiofysik
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- Grip, Helena (författare)
- Umeå universitet,Radiofysik
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- Öhberg, Fredrik, 1969- (författare)
- Umeå universitet,Radiofysik
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- Sundström, Nina (författare)
- Umeå universitet,Radiofysik
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(creator_code:org_t)
- 2021-11-26
- 2021
- Engelska.
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Ingår i: Physiological Measurement. - : Institute of Physics (IOP). - 0967-3334 .- 1361-6579. ; 42:10
- Relaterad länk:
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https://doi.org/10.1...
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Objective: In healthy gait a forceful push-off is needed to get an efficient leg swing and propulsion, and a high heel lift makes a forceful push-off possible. The power of the push-off is decreased with increased age and in persons with impaired balance and gait. The aim of this study was to evaluate whether a wearable equipment (Striton) and algorithms to estimate vertical heel-height during gait from a single optical distance sensor is reliable and feasible for clinical applications.Approach: To assess heel-height with the Striton system an optical distance sensor was used to measure the distance to the floor along the shank. An algorithm was created to transform this measure to a vertical distance. The heel-height was validated in an experimental setup, against a 3D motion capture system (MCS), and test-retest and day-to-day tests were performed on 10 elderly persons. As a reference material 83 elderly persons were included, and heel-height was measured before and after surgery in four patients with the neurological disorder idiopathic normal pressure hydrocephalus (iNPH).Main results: In the experimental setup the accuracy was high with a maximum error of 2% at all distances, target colours and inclination angles, and the correlation to the MCS was R = 0.94. Test-retest and day-to-day tests were equal within ±1.2 cm. Mean heel-height of the elderly persons was 16.5 ± 0.6 cm and in the patients with iNPH heel-height was increased from 11.2 cm at baseline to 15.3 cm after surgery.Significance: Striton can reliably measure heel-height during gait, with low test-retest and day-to-day variability. The system was easy to attach, and simple to use, which makes it suitable for clinical applications.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Medicinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering (hsv//eng)
Nyckelord
- heel-height
- optical sensor
- heel-height variability
- push-off phase
- medical informatics
- medicinsk informatik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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