| 1. |
- Fan, Xuelong, et al.
(författare)
-
Ergonomic Evaluation of a Prototype Console for Robotic Surgeries via Simulations with Digital Human Manikins
- 2019
-
Ingår i: Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018) Volume V: Human Simulation and Virtual Environments, Work With Computing Systems (WWCS), Process Control. - Cham : Springer International Publishing. - 2194-5365 .- 2194-5357. - 9783319960760 ; 822, s. 351-363
-
Konferensbidrag (refereegranskat)abstract
- Work-related musculoskeletal disorders impact surgical performance, which increase risks for patient safety. A new console has been designed to reduce workload for robotic surgery surgeons. Due to high costs and long waiting time of the production process, a pre-production ergonomic evaluation of the new design is preferable. In this paper, we evaluate if the new console at the pre-production stage by using an US checklist, and the Swedish standard for visual display unit work. A 3D model of the new designed console was introduced to the virtual environment of a digital manikin (Intelligently Moving Manikin, IMMA). The work-ranges of the console were calculated. Various individual work distances of 12 manikins (3 men and 3 women per each of the US and the Swedish population) were “measured”. The data were integrated and used as an objective reference to compare with the Swedish standard, and the US checklist. The result shows that the criteria in the Swedish standard and the US checklist are fulfilled, except for those are related to the adjustable range of the screen view height, the height range of the armrest and the adjustable distance of the pedals. The new console fulfills most of the criteria in the checklist and the standard, but there is room for a few improvements. The DHM tool IMMA provides the possibility for a pre-production assessment. However, the limited virtual measurement tools of IMMA restrained the time efficiency of the ergonomic assessment.
|
|
| 2. |
- Lind, Carl, et al.
(författare)
-
Development and evaluation of RAMP I : a practitioner tool for screening for musculoskeletal disorder risk factors in manual handling
- 2017
-
Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- RAMP I is a screening tool developed to support practitioners in screening for work-related musculoskeletal disorder risk factors related to manual handling. RAMP I, which is part of the RAMP tool, is based on research based studies combined with expert group judgments. More than 80 practitioners participated in the development of RAMP I. The tool constitutes of dichotomous assessment items grouped in seven categories. Acceptable reliability was found for a majority of the assessment items for 15 practitioners who were given 1h training. The usability evaluation points to RAMP I being usable for screening for musculoskeletal disorder risk factors, i.e., usable for assessing risks, usable as a decision base, has clear results, and the time needed for an assessment is acceptable. It is concluded that RAMP I is a valuable tool for practitioners.
|
|
| 3. |
- Lind, Carl, et al.
(författare)
-
Development and evaluation of RAMP I – a practitioner’s tool for screening of musculoskeletal disorder risk factors in manual handling
- 2019
-
Ingår i: International Journal of Occupational Safety and Ergonomics (JOSE). - : Taylor & Francis. - 1080-3548 .- 2376-9130. ; 25:2, s. 165-180
-
Tidskriftsartikel (refereegranskat)abstract
- RAMP I is a screening tool developed to support practitioners in screening for work-related musculoskeletal disorder riskfactors related to manual handling. RAMP I, which is part of the RAMP tool, is based on research-based studies combinedwith expert group judgments. More than 80 practitioners participated in the development of RAMP I. The tool consistsof dichotomous assessment items grouped into seven categories. Acceptable reliability was found for a majority of theassessment items for 15 practitioners who were given 1 h of training. The usability evaluation points to RAMP I beingusable for screening for musculoskeletal disorder risk factors, i.e., usable for assessing risks, being usable as a decision base,having clear results and that the time needed for an assessment is acceptable. It is concluded that RAMP I is a usable toolfor practitioners.
|
|
| 4. |
|
|
| 5. |
- Zetterberg, Camilla, 1970-, et al.
(författare)
-
Temporal co-variation between eye lens accommodation and trapezius muscle activity during a dynamic near-far visual task
- 2015
-
Ingår i: PLOS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 10:5
-
Tidskriftsartikel (refereegranskat)abstract
- Near work is associated with increased activity in the neck and shoulder muscles, but the underlying mechanism is still unknown. This study was designed to determine whether a dynamic change in focus, alternating between a nearby and a more distant visual target, produces a direct parallel change in trapezius muscle activity. Fourteen healthy controls and 12 patients with a history of visual and neck/shoulder symptoms performed a Near-Far visual task under three different viewing conditions; one neutral condition with no trial lenses, one condition with negative trial lenses to create increased accommodation, and one condition with positive trial lenses to create decreased accommodation. Eye lens accommodation and trapezius muscle activity were continuously recorded. The trapezius muscle activity was significantly higher during Near than during Far focusing periods for both groups within the neutral viewing condition, and there was a significant co-variation in time between accommodation and trapezius muscle activity within the neutral and positive viewing conditions for the control group. In conclusion, these results reveal a connection between Near focusing and increased muscle activity during dynamic changes in focus between a nearby and a far target. A direct link, from the accommodation/vergence system to the trapezius muscles cannot be ruled out, but the connection may also be explained by an increased need for eye-neck (head) stabilization when focusing on a nearby target as compared to a more distant target.
|
|
