| 1. |
|
|
| 2. |
- Hyyppä, Kalevi, et al.
(författare)
-
Projekt: Seende rullstol
- 2012
-
Annan publikation (populärvet., debatt m.m.)abstract
- Projektet syftar till att göra det möjligt för personer med funktionsnedsättning, som inte själva har full förmåga att styra en rullstol, att ändå nyttja den. Sensorer på rullstolen upptäcker automatiskt hinder i omgivningen och ger därmed den rörelsehindrade hjälp med styrningen.En virtuell blindkäpp som består av en haptisk robotarm kopplad till en laser som mäter avstånd till föremål i omgivningen har även tagits fram. Utifrån informationen skapas en 3D-bild som brukaren av den virtuella blindkäppen kan känna på med robotarmen.Fortsatt forskning kommer att fokusera på den virtuella vita käppen som kommer att ha en mycket längre räckvidd än en vanlig vit käpp. Vi avser att göra den handhållen så att rullstolen inte behövs som bärare av laserskanner och haptisk robot. En mycket viktig del i vår forskning är att åstadkomma en bra användarupplevelse. Synskadade, som har stor erfarenhet av den vanlig vita käppen, skall snabbt lära sig att använda den virtuella vita käppen.
|
|
| 3. |
- Innala Ahlmark, Daniel, et al.
(författare)
-
An Initial Field Trial of a Haptic Navigation System for Persons with a Visual Impairment
- 2015
-
Ingår i: Journal of Assistive Technologies. - 1754-9450 .- 2042-8723. ; 9:4, s. 199-206
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose– The purpose of this paper is to describe conceptions of feasibility of a haptic navigation system for persons with a visual impairment (VI). Design/methodology/approach– Six persons with a VI who were white cane users were tasked with traversing a predetermined route in a corridor environment using the haptic navigation system. To see whether white cane experience translated to using the system, the participants received no prior training. The procedures were video-recorded, and the participants were interviewed about their conceptions of using the system. The interviews were analyzed using content analysis, where inductively generated codes that emerged from the data were clustered together and formulated into categories. Findings– The participants quickly figured out how to use the system, and soon adopted their own usage technique. Despite this, locating objects was difficult. The interviews highlighted the desire to be able to feel at a distance, with several scenarios presented to illustrate current problems. The participants noted that their previous white cane experience helped, but that it nevertheless would take a lot of practice to master using this system. The potential for the device to increase security in unfamiliar environments was mentioned. Practical problems with the prototype were also discussed, notably the lack of auditory feedback. Originality/value– One novel aspect of this field trial is the way it was carried out. Prior training was intentionally not provided, which means that the findings reflect immediate user experiences. The findings confirm the value of being able to perceive things beyond the range of the white cane; at the same time, the participants expressed concerns about that ability. Another key feature is that the prototype should be seen as a navigation aid rather than an obstacle avoidance device, despite the interaction similarities with the white cane. As such, the intent is not to replace the white cane as a primary means of detecting obstacles.
|
|
| 4. |
|
|
| 5. |
- Johansson Strandkvist, Viktor, et al.
(författare)
-
Hand grip strength is associated with forced expiratory volume in 1 second among subjects with COPD : report from a population-based cohort study
- 2016
-
Ingår i: The International Journal of Chronic Obstructive Pulmonary Disease. - : Dove Medical Press. - 1176-9106 .- 1178-2005. ; 11, s. 2527-2534
-
Tidskriftsartikel (refereegranskat)abstract
- Background: Cardiovascular diseases and skeletal muscle dysfunction are common comorbidities in COPD. Hand grip strength (HGS) is related to general muscle strength and is associated with cardiovascular disease and all-cause mortality, while the results from small selected COPD populations are contradictory. The aim of this population-based study was to compare HGS among the subjects with and without COPD, to evaluate HGS in relation to COPD severity, and to evaluate the impact of heart disease. Subjects and methods: Data were collected from the Obstructive Lung disease in Northern Sweden COPD study, where the subjects with and without COPD have been invited to annual examinations since 2005. In 2009-2010, 441 subjects with COPD (postbronchodilator forced expiratory volume in 1 second [FEV1]/vital capacity,0.70) and 570 without COPD participated in structured interviews, spirometry, and measurements of HGS. Results: The mean HGS was similar when comparing subjects with and without COPD, but those with heart disease had lower HGS than those without. When compared by Global Initiative for Chronic Obstructive Lung Disease (GOLD) grades, the subjects with GOLD 3-4 had lower HGS than those without COPD in both sexes (females 21.4 kg vs 26.9 kg, P=0.010; males 41.5 kg vs 46.3 kg, P=0.038), and the difference persisted also when adjusted for confounders. Among the subjects with COPD, HGS was associated with FEV1% of predicted value but not heart disease when adjusted for height, age, sex, and smoking habits, and the pattern was similar among males and females. Conclusion: In this population-based study, the subjects with GOLD 3-4 had lower HGS than the subjects without COPD. Among those with COPD, HGS was associated with FEV1% of predicted value but not heart disease, and the pattern was similar in both sexes.
|
|
| 6. |
- Johansson Strandkvist, Viktor, et al.
(författare)
-
Impact of heart disease on hand grip strength in COPD: epidemiological data
- 2016
-
Konferensbidrag (refereegranskat)abstract
- Background: Hand grip strength (HGS) and heart disease (HD) are related to mortality. Peripheral muscle dysfunction and HD are both frequently observed among subjects with COPD, but the relationship between HGS and HD in COPD is unclear.Aim: To evaluate HGS and the impact of HD among subjects with and without COPD.Methods: Data was collected from the OLIN (Obstructive Lung Disease in Northern Sweden) COPD study, where subjects with COPD have been invited to annual examinations since 2005 together with age- and sex-matched subjects without COPD. During 2009, 441 subjects with COPD and 570 without COPD participated in examinations including structured interviews, spirometry and measurements of HGS. COPD was defined as post-bronchodilator FEV1/VC<0.70.Results: Both among subjects with and without COPD, and in both sexes, those with HD had significantly lower HGS. The proportion of subjects below estimated normal value for HGS was similar in subjects with and without COPD and in both sexes; among women (35.4 vs. 33.4%, p=0.714) and men (19.1 vs 15.9%, p=0.315). In a linear regression model among subjects with COPD only, HGS was significantly associated with age, beta coefficient (B) = -0.46 (p<0.001), sex, B=19.85 (p<0.001) and FEV1 % of predicted normal value, B=0.06 (p=0.007), but not with HD or smoking habits. When a similar model was estimated among subjects without COPD, HGS was only associated with age and sex.Conclusions: In this population-based study, subjects with heart disease had lower hand grip strength regardless if they had COPD or not. Among COPD subjects, hand grip strength was associated with age, sex and FEV1, but not with heart disease.
|
|
| 7. |
- Lindström, Britta, et al.
(författare)
-
Positive attitudes and preserved high level of motor performance are important factors for return to work in younger persons after stroke : a national survey
- 2009
-
Ingår i: Journal of Rehabilitation Medicine. - : Medical Journals Sweden AB. - 1650-1977 .- 1651-2081. ; 41:9, s. 714-718
-
Tidskriftsartikel (refereegranskat)abstract
- Objective: Significant numbers of younger persons with stroke should be given the opportunity to return to work. The aim of this study was to investigate factors of importance for return to work among persons after first ever stroke, in the age range 18-55 years. Methods: A questionnaire was sent to all persons who had experienced a first ever stroke, 18-55 years of age, registered in the Swedish national quality register for stroke care, Riks-Stroke. Of the 1068 who answered the questionnaire, 855 (539 men and 316 women) were in paid employment before their stroke, and were included in this study. Results:Sixty-five percent returned to work and, of these, an equal proportion were men and women. Significant factors associated with return to work were the perceived importance of work (odds ratio (OR) 5.10), not perceiving themselves as a burden on others (OR 3.33), support from others for return to work (OR 3.66), retaining the ability to run a short distance (OR 2.77), and higher socioeconomic codes (OR 2.12). A negative association was found between those rehabilitated in wards intended for younger persons and return to work (OR 0.37). Conclusion: External support from others, and positive attitudes towards return to work, were factors associated with successful return to work after stroke. Contrary to what was expected, independence in personal activities of daily living and cognitive factors were not associated with return to work to the same extent as persistent higher level of physical functions, such as ability to run a short distance.
|
|
| 8. |
|
|
| 9. |
- Röding, Jenny, et al.
(författare)
-
Life satisfaction in younger individuals after stroke : different predisposing factors among men and women
- 2010
-
Ingår i: Journal of Rehabilitation Medicine. - : Medical Journals Sweden AB. - 1650-1977 .- 1651-2081. ; 42:2, s. 155-161
-
Tidskriftsartikel (refereegranskat)abstract
- There were different factors for being satisfied with life as a whole between men and women, indicating a need for a more gender-specific rehabilitation than is currently used. The impact that deteriorated ability to concentrate has on life satisfaction is an important finding that needs to be considered in the rehabilitation process of younger patients after stroke.
|
|
| 10. |
|
|
| 11. |
|
|
| 12. |
- Röding, Jenny, et al.
(författare)
-
Perceived impaired physical and cognitive functions after stroke in men and women between 18 and 55 years of age – a national survey
- 2009
-
Ingår i: Disability and Rehabilitation. - : Informa UK Limited. - 0963-8288 .- 1464-5165. ; 31:13, s. 1092-1099
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose. We describe self-reported consequences for physical and cognitive functions, detect possible gender differences, and find factors that were associated with deteriorated physical function in younger stroke patients, independent in their personal activities of daily life.Methods. This study involved all first ever stroke patients, aged 18-55 years, registered in the Swedish national quality register for stroke. A questionnaire was answered by 1068 patients 8-36 months after the stroke. Changes were sought in physical and cognitive functions as compared with the pre-stroke condition.Results. Eight hundred and sixty-seven patients (83%) were independent in personal activities of daily life. Significant differences between men and women were found: deteriorated physical ability was reported by 56-71% of the men and 65-79% of the women; deteriorated cognitive function was reported by 48-57% of the men and 57-68% of the women. Many patients (70% men, 77% women) reported that they had received insufficient information about physical exertion. Significant associations were found between deteriorated physical function and deteriorated cognitive function as well as fear of physical exertion.Conclusions. Deterioration was found in physical and cognitive functions greater in women then in men. Insecurity regarding physical exertion existed indicating that younger stroke patients might need information directly aimed at physical functioning and more gender specific than today. This study has raised the awareness that there also might be gender differences in other fields, which needs further studies.
|
|
| 13. |
|
|
| 14. |
|
|
| 15. |
- Röding, Jenny, 1972-
(författare)
-
Stroke in the younger : Self-reported impact on work situation, cognitive function, physical function and life satisfaction - A national survey
- 2009
-
Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The majority of people affected by stroke are older however one fifth of all persons with stroke are younger than 65 years. In Sweden the mean age at the time of a stroke is 75 years and about 5 % of those who suffer a stroke are 55 years or younger. The aim of this thesis was to describe and analyse the consequences of stroke in the younger population in terms of experiences of the rehabilitation process, return to work, self-reported physical and cognitive function and life satisfaction. Sex differences, as well as gender specific associations regarding factors of importance for return to work, deteriorated physical ability and satisfaction with life as a whole, were also studied. This thesis was based on an in-depth interview study and self reported data collected from a questionnaire answered by 1068 individuals, 18-55 years old with a first ever stroke registered in Riks-Stroke, the Swedish national quality register for stroke care. The questionnaire concerned aspects of current health condition, living and social arrangements, physical and cognitive functions, activities in daily life, relationships, social life, leisure pursuits, self-perception, participation, work and life satisfaction. Most of the questions aimed to investigate differences between the present time and before stroke onset. In-depth interviews with two men and three women aged 37-54, living at home after their stroke generated the hypotheses that younger persons with stroke are frustrated and feel invisible and outside. Rehabilitation for the young was perceived as in adequate due to the fact that the rehabilitation setting does not acknowledge the specific needs that younger persons with stroke have. Prior to the stroke 855 of 1068 (80%) of the participants, had been in paid employment. After the stroke, 65% of the men and 66 % of the women returned to work. Factors of importance for return to work were associated with the self-reported data: the feeling that it was important to work (OR 5.1), not perceiving oneself as a burden to others (OR 3.3), not having a deteriorated ability to run a shorter distance (OR 2.8) and having support for return to work (OR 3.7). Changes in self-reported physical and cognitive functions as compared with pre-stroke condition was explored in 867 (513 men and 354 women) P-ADL independent persons with stroke. Deteriorated physical abilities were reported in 56-79% and deteriorated cognitive abilities in 48- 68% of the participants. Women were significantly more affected in terms of both physical and cognitive deterioration than the men. Seventy-two percent of the participants did not know how much they could physically exert themselves after their stroke, women significantly more than men. In addition, significant associations were found between deteriorated physical function and deteriorated cognitive function as well as fear of physical exertion. The strongest association for deteriorated ability to move in crowded environments was the risk factors deteriorated cognitive ability (OR of 5.4) and being afraid of physical exertion (OR of 3.1). Life Satisfaction and factors associated with not being satisfied with life as a whole in 1068 (631 men and 437 women) persons with stroke was assessed with the LiSat 9, baseline data from Riks- Stroke and self-reported answers from the questionnaire. Fifty-three percent of the participants were not satisfied with life as a whole. Men and women were analyzed separately in terms of associations with not being satisfied with life as a whole. Women who had a haemorrhage (OR 3.9) and a deteriorated ability to concentrate (OR 2.1) had a higher risk of not being satisfied. For men the risk was associated with living without a significant other (OR 3.2), not working (OR 2.3) and deteriorated ability to concentrate (OR 2.0). In conclusion, younger individuals who have experienced a stroke feel frustrated and invisible due to the fact that their needs are not acknowledged. Age and gender have an impact on outcome of present rehabilitation programs and the problems of younger persons with stroke can be detected at an earlier stage by developing appropriate instrument and delivering information directly aimed at physical functioning. Further studies on gender specific differences in stroke outcome concerning physical and cognitive functions as well as life situation after stroke are needed. In order to optimize rehabilitation in terms of return to work, external support and motivation seem to be important factors to consider. Key words: Adult, cognition disorders, gender differences, middle aged, motor activity, quality of life,questionnaires, stroke, work
|
|
| 16. |
- Röding, Magnus, 1984, et al.
(författare)
-
The gamma distribution model for pulsed-field gradient NMR studies of molecular-weight distributions of polymers
- 2012
-
Ingår i: Journal of Magnetic Resonance. - : Elsevier BV. - 1090-7807 .- 1096-0856. ; 222, s. 105-111
-
Tidskriftsartikel (refereegranskat)abstract
- Self-diffusion in polymer solutions studied with pulsed-field gradient nuclear magnetic resonance (PFG NMR) is typically based either on a single self-diffusion coefficient, or a log-normal distribution of self-diffusion coefficients, or in some cases mixtures of these. Experimental data on polyethylene glycol (PEG) solutions and simulations were used to compare a model based on a gamma distribution of self-diffusion coefficients to more established models such as the single exponential, the stretched exponential, and the log-normal distribution model with regard to performance and consistency. Even though the gamma distribution is very similar to the log-normal distribution, its NMR signal attenuation can be written in a closed form and therefore opens up for increased computational speed. Estimates of the mean self-diffusion coefficient, the spread, and the polydispersity index that were obtained using the gamma model were in excellent agreement with estimates obtained using the log-normal model. Furthermore, we demonstrate that the gamma distribution is by far superior to the log-normal, and comparable to the two other models, in terms of computational speed. This effect is particularly striking for multi-component signal attenuation. Additionally, the gamma distribution as well as the log-normal distribution incorporates explicitly a physically plausible model for polydispersity and spread, in contrast to the single exponential and the stretched exponential. Therefore, the gamma distribution model should be preferred in many experimental situations.
|
|
| 17. |
- Strandkvist, Viktor, et al.
(författare)
-
Hand muscle strength in COPD : A population based study
- 2013
-
Ingår i: European Respiratory Journal. - 0903-1936 .- 1399-3003. ; 42:Suppl 57
-
Tidskriftsartikel (refereegranskat)abstract
- Background: Skeletal muscle dysfunction is a known systemic- or extra pulmonary effect in COPD. The relationship between the severity of the disease according to GOLD’s spirometric criteria and muscle dysfunction is however not clearly explored.Aim: To investigate hand grip strength (HGS) in subjects with COPD compared to subjects without airflow obstruction.Method: Lung function and HGS was measured according to validated methods in the years of 2009-2010 within the Obstructive Lung Disease in Northern Sweden (OLIN) COPD-study. HGS, was measured with a hand-held dynamometer (Jamar®) in kilogram-strength (kgf), which has been shown to correlate strongly with both upper- and lower extremity strength. The sample included 441 subjects with COPD according to GOLD criteria (FEV1/FVC<0.70) and 571 non-COPD subjects in the same ages.Results: Among men, HGS was lower in GOLD III-IV, mean=31.4 kgf, compared to GOLD II, mean=37.2 kgf (p=0.009), GOLD I, mean=36.9 kgf (p=0.024), and subjects without COPD, mean=37.6 kgf (p=0.024). Among women no such correlation was found. In the whole sample, HGS, did not differ significantly between subjects with and without COPD, or COPD stages according to GOLD. No correlation was found between percent predicted FEV1 but a strong and positive relationship was found between the crude value of FEV1 and HGS (pearson's r=0.67).Conclusion: Among men, GOLD III-IV was associated with a lower HGS, however not among women.
|
|
