Search results for "ergonomic"

A Review of Occlusion as a Tool to Assess Attentional Demand in Driving

2021

Objective The aim of this review is to identify how visual occlusion contributes to our understanding of attentional demand and spare visual capacity in driving and the strengths and limitations of the method. Background The occlusion technique was developed by John W. Senders to evaluate the attentional demand of driving. Despite its utility, it has been used infrequently in driver attention/inattention research. Method Visual occlusion studies in driving published between 1967 and 2020 were reviewed. The focus was on original studies in which the forward visual field was intermittently occluded while the participant was driving. Results Occlusion studies have shown that attentional demand…

Accumulation of sensory difficulties predicts fear of falling in older women

2013

Objectives: To explore whether the accumulation of sensory difficulties predicts fear of falling (FOF), and whether the traits correlate with each other regardless of familial factors. Methods: Self-reported hearing, vision and balance difficulties, and FOF were assessed using structured questionnaires at the baseline and after a 3-year follow-up in 63- to 76-year-old women ( n = 434). Results: Among the women without FOF at baseline ( n = 245), 41% reported FOF at follow-up. Increasing numbers of sensory difficulties at baseline predicted higher incidence of FOF. The relationship between accumulated sensory difficulties and FOF was not mediated by familial factors. Discussion: The accumul…

Towards real-time detection of cognitive effort in driving: Contribution of cardiac measurement

2016

En 2013, on estime que 40 à 50% des accidents corporels seraient dus à des défauts d'attention de la part du conducteur. Des études récentes ont mis en évidence la possibilité de détecter des états attentionnels dégradés afin de pouvoir mieux assister le conducteur ; ce thème de recherche représente donc un nouveau gisement de sécurité routière. Cette étude se concentre sur la détection de l'effort cognitif fournit par les conducteurs et cherche, par l'étude de la variation du rythme cardiaque, à identifier un indicateur d'effort sensible sur de courtes fenêtres temporelles.Chacun des 18 participants a passé 8 conditions expérimentales sur simulateur de conduite : la moitié où seule une tâc…

Video-assisted surgery: suggestions for failure prevention in laparoscopic cholecystectomy

2014

Background: Surgery differs from other medical specialties in its execution. It is often complex and includes considerable individual variations. Observing problems in operating theatres (OT) allows for the identification of system failures which should be defined for learning purposes to increase patient safety and enhance general safety culture within hospital organizations. This study evaluates a common video-assisted surgical procedure, laparoscopic cholecystectomy (LC) through failure analysis. The profile of the LC procedure and failure sources is presented. Methods: Data consisted video-observations and interviews concerning twelve LC operations performed at a day surgery unit. All o…

Evaluation of the effectiveness of occupational injury prevention programs at the company level

2013

The objective was to evaluate the effectiveness of an occupational injury prevention program, known as the Preferential Action Plan (PAP), focused on companies with high incidence rates of occupational injuries. We studied 1189 companies in the industrial, construction and services sectors between 1999 and 2007 in the Valencia region (Spain). Our sample included 507,262 workers, among whom 44,250 non-fatal occupational injuries with at least a workday lost were registered. Companies included in a PAP program were divided into three intervention groups, according to the year that each company entered into a PAP (2000, 2001, and 2002). We calculated annual percentage change in incidence rates…

WHIPLASH INJURIES IN SPORTS ACTIVITIES. CLINICAL OUTCOME AND BIOMECHANICS

2013

Background Cervical whiplash syndrome, or hyperextension-hyperflexion injury, is a common traumatic injury in sports activities. The mechanisms of injury that cause cervical whiplash syndrome vary, but they may be sufficient enough to cause chronic whiplash syndrome. Methods and Patients Over 150 injuries were recorded in sports in our Orthopaedic Departments between the years of 2008 and 2011. Whiplash spine injuries have been reported in most contact sports, including indoor soccer, basketball, and wrestling, and in several non contact sports, such as diving. Whiplash spine injuries are estimated to occur in high percentage of indoor soccer players, and most commonly on defensive players.…

How do young offenders describe their parents?

2001

The study examined (1) what dimensions of parenting would emerge from retrospective reports of parental behaviour, and (2) whether childhood family violence and parental problems are associated with later perceptions of parenting among 89 young male Finnish inmates. The inmates completed the Parent Behaviour Inventory (PBI) and the Conflict Tactics Scales (CTS). Data on childhood family violence and parental problems were obtained from two files. The PBI yielded three factors and the CTS two factors for both mothers and fathers. When the PBI and CTS factors were combined into a principalcomponents analysis, five dimensions of perceptions of parenting emerged: maternal rejection, paternal re…

Comparative ergonomic workflow and user experience analysis of MRI versus fluoroscopy-guided vascular interventions: an iliac angioplasty exemplar ca…

2014

A methodological framework is introduced to assess and compare a conventional fluoroscopy protocol for peripheral angioplasty with a new magnetic resonant imaging (MRI)-guided protocol. Different scenarios were considered during interventions on a perfused arterial phantom with regard to time-based and cognitive task analysis, user experience and ergonomics. Three clinicians with different expertise performed a total of 43 simulated common iliac angioplasties (9 fluoroscopic, 34 MRI-guided) in two blocks of sessions. Six different configurations for MRI guidance were tested in the first block. Four of them were evaluated in the second block and compared to the fluoroscopy protocol. Relevant…

A reanalysis of spinal motion during vibration

1987

Calibrated film of the motion of the lumbar spine during vibration was reanalysed, making use of a number of computer based techniques to improve accuracy and reduce measurement noise. The results demonstrated resonant behaviour at about 4 Hz and indicated that at vibration levels of the order of 1 m/s2 there exists bending of the order of 1° (peak to peak) between adjacent vertebrae in the lumbar spine. The bending is complex and involves phase differences along the spine and possibly a rocking motion of the pelvis.

2020

The occupation of dental assistants (DAs) involves many health risks of the musculoskeletal system due to static and prolonged work, which can lead to musculoskeletal disorders (MSDs). The aim of the study was to investigate the prevalence of MSDs in DAs in Germany. Methods: For this purpose, an online questionnaire analyzed 406 (401 female participants and 5 male participants, 401w/5m) DAs. It was based on the Nordic Questionnaire (lifetime, 12-month, and seven-day MSDs’ prevalence separated into neck, shoulder, elbow, wrist, upper back, lower back, hip, knee, and ankle), and occupational and sociodemographic questions as well as questions about specific medical conditions. Results: 98.5% …