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Design and Tests of a Biofeedback Based Weight Bearing Rehabilitation Device
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH).
2019 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Design och test av en biofeedback-baserad viktbärande rehabiliteringsenhet (Swedish)
Abstract [en]

As upper-limb rehabilitation devices development continue to grow, lower limb rehabilitation devices have limited development. Thus a device that measures weight bearing of heel and forefoot during gait and also produces auditory feedback at certain thresholds were made in this project. The device was constructed based on an ARM-Core microcontroller and was supported by 5 force sensing resistor sensors for each foot. Communications between the modules and the computer as the GUI were established using an UART interface. For testing, sensors were placed beneath the foot using a stretchable cloth so each different subjects’ pressure points were correctly placed. The biofeedback used for this device was by enabling a buzzer and LED embedded to the designed board that turns on when heel strike or push off reached acertain threshold. Testing were divided into phase one and two. From phase one, it was concluded that both push off and heel strike event can have a reading exceeding 8.5% of the body weight. It was then used as a threshold for the biofeedback event. During the biofeedback tests, improvements in the subjects’ walking pattern and reading were noted. Results suggest that biofeedback can change the behavior of the subject.

Abstract [sv]

I takt med att utvecklingen av rehabilitationsapparater i övre extremiteterna fortsätter att växa, har rehabiliteringsanordningar för nedre extremiteterna begränsad utveckling. Således gjordes en anordning som mäter viktbearbetning av häl och framfot under gång och också ger hörselåterkoppling vid vissa trösklar i detta projekt. Enheten var konstruerad baserad på en ARM-Core mikrokontroller och stöds av 5 kraftsavkännande motståndssensorer för varje fot. Kommunikation mellan modulerna och datorn som GUI upprättades medhjälp av ett UART-gränssnitt. För testning placerades sensorer under foten meden töjbar duk så att varje olika försöks tryckpunkter placerades korrekt. Den biofeedback som användes för den här enheten var genom att aktivera en summer och LED inbäddad i det konstruerade kortet som slås på när hälslaget eller skjutstoppet nådde en viss tröskel. Testningen delades in i fas en och två. Frånfas ett drogs slutsatsen att både push off och hälstreffhändelse kan ha en avläsningsom överstiger 8.5% av kroppsvikt. Den användes sedan som en tröskelför biofeedback-händelsen. Under biofeedback-testen noterades förbättringar i försökspersonernas gångmönster och läsning. Resultaten tyder på att biofeedback kan förändra beteendet hos ämnet.

Place, publisher, year, edition, pages
2019. , p. 65
Series
TRITA-CBH-GRU ; 2019:113
Keywords [en]
biofeedback, weight bearing, rehabilitation, prototype, wearable, embedded systems
National Category
Medical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-262866OAI: oai:DiVA.org:kth-262866DiVA, id: diva2:1362882
External cooperation
Learn To Move AB
Subject / course
Medical Engineering
Educational program
Master of Science - Medical Engineering
Presentation
2019-09-10, T2, KTH School of Technology and Health, Hälsovägen 11, 141 52, Huddinge, 09:00 (English)
Supervisors
Examiners
Available from: 2019-10-23 Created: 2019-10-21 Last updated: 2019-10-23Bibliographically approved

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