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Publications (10 of 29) Show all publications
Rusaw, D. (2018). Adaptations from the prosthetic and intact limb during standing on a sway referenced support surface for transtibial prosthesis users. Disability and Rehabilitation: Assistive Technology
Open this publication in new window or tab >>Adaptations from the prosthetic and intact limb during standing on a sway referenced support surface for transtibial prosthesis users
2018 (English)In: Disability and Rehabilitation: Assistive Technology, ISSN 1748-3107, E-ISSN 1748-3115Article in journal (Refereed) Epub ahead of print
Place, publisher, year, edition, pages
Taylor & Francis, 2018
National Category
Orthopaedics
Identifiers
urn:nbn:se:hj:diva-41126 (URN)10.1080/17483107.2018.1498925 (DOI)XYZ ()2-s2.0-85057569055 (Scopus ID)
Available from: 2018-08-13 Created: 2018-08-13 Last updated: 2019-02-06
Rusaw, D. (2018). An Iterative Feedback Procedure for Course Evaluation and Structure. In: : . Paper presented at ISPO Global Educators Meeting 2018, Göttingen, Germany, 18-20 September 2018.
Open this publication in new window or tab >>An Iterative Feedback Procedure for Course Evaluation and Structure
2018 (English)Conference paper, Oral presentation only (Refereed)
National Category
Educational Sciences
Identifiers
urn:nbn:se:hj:diva-41671 (URN)
Conference
ISPO Global Educators Meeting 2018, Göttingen, Germany, 18-20 September 2018
Available from: 2018-10-01 Created: 2018-10-01 Last updated: 2018-10-02Bibliographically approved
Rusaw, D. (2018). Biomechanical Models of Standing in Prosthetic Users. In: : . Paper presented at 11. Nordiske Bandagist Kongres, 6-8 September, 2018, Copenhagen, Denmark.
Open this publication in new window or tab >>Biomechanical Models of Standing in Prosthetic Users
2018 (English)Conference paper, Oral presentation only (Other academic)
National Category
Orthopaedics
Identifiers
urn:nbn:se:hj:diva-41672 (URN)
Conference
11. Nordiske Bandagist Kongres, 6-8 September, 2018, Copenhagen, Denmark
Available from: 2018-10-01 Created: 2018-10-01 Last updated: 2018-10-02Bibliographically approved
Rusaw, D., Hellstrand Tang, U., Nordén, E., Johannesson, A. & Jarl, G. (2018). Clinical guidelines for orthotic treatment of osteoarthritis of the knee: a review with a nordic perspective. In: : . Paper presented at 11. Nordiske Bandagist Kongres, 6-8 September, 2018, Copenhagen, Denmark.
Open this publication in new window or tab >>Clinical guidelines for orthotic treatment of osteoarthritis of the knee: a review with a nordic perspective
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2018 (English)Conference paper, Oral presentation only (Other academic)
National Category
Orthopaedics
Identifiers
urn:nbn:se:hj:diva-41674 (URN)
Conference
11. Nordiske Bandagist Kongres, 6-8 September, 2018, Copenhagen, Denmark
Available from: 2018-10-01 Created: 2018-10-01 Last updated: 2018-10-02Bibliographically approved
Barnett, C. T., Vanicek, N. & Rusaw, D. (2018). Do predictive relationships exist between postural control and falls efficacy in unilateral transtibial prosthesis users?. Archives of Physical Medicine and Rehabilitation, 99(11), 2271-2278
Open this publication in new window or tab >>Do predictive relationships exist between postural control and falls efficacy in unilateral transtibial prosthesis users?
2018 (English)In: Archives of Physical Medicine and Rehabilitation, ISSN 0003-9993, E-ISSN 1532-821X, Vol. 99, no 11, p. 2271-2278Article in journal (Refereed) Published
Abstract [en]

Objective

To assess whether variables from a postural control test relate to and predict falls efficacy in prosthesis users.

Design

Twelve-month within and between subjects repeated measures design. Participants performed the Limits of Stability (LOS) test protocol at study baseline and at 6-month follow-up. Participants also completed the Falls Efficacy Scale-International (FES-I) questionnaire, reflecting the fear of falling, and reported the number of falls monthly between study baseline and 6-month follow-up, and additionally at 9- and 12-month follow-ups.

Setting

University biomechanics laboratories.

Participants

A group of active unilateral transtibial prosthesis users of primarily traumatic etiology (PROS) (n=12) with at least one year of prosthetic experience and age and gender matched control participants (CON) (n=12).

Interventions

Not applicable.

Main Outcome Measure(s)

Postural control variables derived from centre of pressure data obtained during the LOS test, which was performed on and reported by the Neurocom Pro Balance Master, namely; reaction time (RT), movement velocity (MVL), endpoint (EPE) and maximum (MXE) excursion and directional control (DCL). Number of falls and total FES-I scores.

Results

During the study period, the PROS group had higher FES-I scores (U = 33.5, p =0.02), but experienced a similar number of falls, compared to the CON group. Increased FES-I score were associated with decreased EPE (R=-0.73, p=0.02), MXE (R=-0.83, p<0.01) and MVL (R=-0.7, p=0.03) in the PROS group, and DCL (R=-0.82, p<0.01) in the CON group, all in the backwards direction.

Conclusions

Study baseline measures of postural control, in the backwards direction only, are related to and potentially predictive of subsequent 6-month FES-I scores in relatively mobile and experienced prosthesis users.

Place, publisher, year, edition, pages
Elsevier, 2018
Keywords
Balance; Efficacy; Falling; Falls; Limits of stability; Postural control; Prosthesis; Transtibial; Unilateral
National Category
Orthopaedics
Identifiers
urn:nbn:se:hj:diva-39411 (URN)10.1016/j.apmr.2018.05.016 (DOI)000451362700019 ()29920230 (PubMedID)2-s2.0-85050855562 (Scopus ID)HHJADULTIS (Local ID)HHJADULTIS (Archive number)HHJADULTIS (OAI)
Available from: 2018-05-14 Created: 2018-05-14 Last updated: 2018-12-17Bibliographically approved
Möller, S., Rusaw, D., Hagberg, K. & Ramstrand, N. (2018). Reduced cortical brain activity with the use of microprocessor-controlled prosthetic knees during walking. Prosthetics and orthotics international
Open this publication in new window or tab >>Reduced cortical brain activity with the use of microprocessor-controlled prosthetic knees during walking
2018 (English)In: Prosthetics and orthotics international, ISSN 0309-3646, E-ISSN 1746-1553Article in journal (Refereed) Epub ahead of print
Abstract [en]

Background: Individuals using a lower-limb prosthesis indicate that they need to concentrate on every step they take. Despite self-reports of increased cognitive demand, there is limited understanding of the link between cognitive processes and walking when using a lower-limb prosthesis.

Objective: The objective was to assess cortical brain activity during level walking in individuals using different prosthetic knee components and compare them to healthy controls. It was hypothesized that the least activity would be observed in the healthy control group, followed by individuals using a microprocessor-controlled prosthetic knee and finally individuals using a non-microprocessor-controlled prosthetic knee.

Study Design: Cross-sectional study.

Methods:: An optical brain imaging system was used to measure relative changes in concentration of oxygenated and de-oxygenated haemoglobin in the frontal and motor cortices during level walking. The number of steps and time to walk 10 m was also recorded. The 6-min walk test was assessed as a measure of functional capacity.

Results: Individuals with a transfemoral or knee-disarticulation amputation, using non-microprocessor-controlled prosthetic knee ( n = 14) or microprocessor-controlled prosthetic knee ( n = 15) joints and healthy controls ( n = 16) participated in the study. A significant increase was observed in cortical brain activity of individuals walking with a non-microprocessor-controlled prosthetic knee when compared to healthy controls ( p < 0.05) and individuals walking with an microprocessor-controlled prosthetic knee joint ( p < 0.05).

Conclusion: Individuals walking with a non-microprocessor-controlled prosthetic knee demonstrated an increase in cortical brain activity compared to healthy individuals. Use of a microprocessor-controlled prosthetic knee was associated with less cortical brain activity than use of a non-microprocessor-controlled prosthetic knee.

Clinical Relevance: Increased understanding of cognitive processes underlying walking when using different types of prosthetic knees can help to optimize selection of prosthetic components and provide an opportunity to enhance functioning with a prosthesis.

Keywords
Attention, artificial limb, brain, gait, neuroimaging
National Category
Orthopaedics
Identifiers
urn:nbn:se:hj:diva-42040 (URN)10.1177/0309364618805260 (DOI)30375285 (PubMedID)
Available from: 2018-11-15 Created: 2018-11-15 Last updated: 2019-04-23
Rusaw, D., Rudholmer, E. & Barnett, C. T. (2017). A limits of stability protocol utilizing measures of the center of mass and center of pressure in transtibial prosthesis users: learning effects and reliability. In: : . Paper presented at ISPO 16th World Congress 2017, Cape Town, South Africa, 8-11 May 2017.
Open this publication in new window or tab >>A limits of stability protocol utilizing measures of the center of mass and center of pressure in transtibial prosthesis users: learning effects and reliability
2017 (English)Conference paper, Oral presentation only (Refereed)
National Category
Orthopaedics
Identifiers
urn:nbn:se:hj:diva-35241 (URN)
Conference
ISPO 16th World Congress 2017, Cape Town, South Africa, 8-11 May 2017
Available from: 2017-03-21 Created: 2017-03-21 Last updated: 2018-01-13Bibliographically approved
Barnett, C. T., Vanicek, N. & Rusaw, D. (2017). A longitudinal analysis of the relationships between postural control, falls efficacy and falling in unilateral transtibial prosthesis users. In: : . Paper presented at ISPO 16th World Congress 2017, Cape Town, South Africa, 8-11 May 2017.
Open this publication in new window or tab >>A longitudinal analysis of the relationships between postural control, falls efficacy and falling in unilateral transtibial prosthesis users
2017 (English)Conference paper, Oral presentation only (Refereed)
National Category
Orthopaedics
Identifiers
urn:nbn:se:hj:diva-35240 (URN)
Conference
ISPO 16th World Congress 2017, Cape Town, South Africa, 8-11 May 2017
Available from: 2017-03-21 Created: 2017-03-21 Last updated: 2018-01-13Bibliographically approved
Rusaw, D., Rudholmer, E. & Barnett, C. T. (2017). Development of a limits of stability protocol for use in transtibial prosthesis users: Learning effects and reliability of outcome variables. Gait & Posture, 58, 539-545
Open this publication in new window or tab >>Development of a limits of stability protocol for use in transtibial prosthesis users: Learning effects and reliability of outcome variables
2017 (English)In: Gait & Posture, ISSN 0966-6362, E-ISSN 1879-2219, Vol. 58, p. 539-545Article in journal (Refereed) Published
Abstract [en]

The aims of this study were to empirically quantify reliability and learning effects of a Limits of Stability protocol for transtibial prosthesis users. Outcome variables from center of pressure and center of mass were tested on: 1) multiple test repetitions within a single test occasion; and 2) between multiple test occasions. Trantibial prosthesis users (n=7) and matched controls (n=7) executed five trials of the Limits of Stability protocol on two occasions per day, on two consecutive days. Inter-trial learning effects and reliability of outcomes extracted via center of mass and center of pressure were evaluated utilizing standard biomechanics laboratory equipment. Reliability was good to excellent except the reaction time variable which was poor (Pooled 95%CI of ICC=0.248-0.484). An inter-trial learning effect was present in directional control for prosthesis users when the first trial was included in analysis (center of mass: 95%CI of r=0.065-0.239; center of pressure: 95%CI of r=0.076-0.249). The use of standard biomechanics lab equipment can produce reliable results for the Limits of Stability protocol. Researchers should be aware of low reliability of reaction time variable in the protocol assessed and should execute at least one practice trial prior to that which is used in subsequent analysis.

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
Balance, Postural Control, Amputee, Prosthesis, Limits of Stability
National Category
Orthopaedics
Identifiers
urn:nbn:se:hj:diva-36921 (URN)10.1016/j.gaitpost.2017.08.021 (DOI)000415234200091 ()28968587 (PubMedID)2-s2.0-85030108663 (Scopus ID)HHJADULTIS (Local ID)HHJADULTIS (Archive number)HHJADULTIS (OAI)
Available from: 2017-08-17 Created: 2017-08-17 Last updated: 2018-12-07
Ramstrand, N., Gjøvaag, T., Starholmen, I. & Rusaw, D. (2017). Effects of knee orthosis design on proprioception and balance. In: : . Paper presented at ISPO 16th World Congress 2017, Cape Town, South Africa, 8-11 May 2017.
Open this publication in new window or tab >>Effects of knee orthosis design on proprioception and balance
2017 (English)Conference paper, Oral presentation only (Refereed)
National Category
Orthopaedics
Identifiers
urn:nbn:se:hj:diva-35242 (URN)
Conference
ISPO 16th World Congress 2017, Cape Town, South Africa, 8-11 May 2017
Available from: 2017-03-21 Created: 2017-03-21 Last updated: 2018-01-13Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-0220-6278

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