Shift Hours' Impact on Fatigue and Tracking of Eye Dynamics
试验速览
- 阶段
- 不适用
- 状态
- 尚未招募
- 发起方
- 入组人数
- 40
- 试验地点
- 1
- 主要终点
- Comparison of slope of the relationship between maximum speed and saccade magnitude
研究概览
简要总结
The goal of this clinical trial is to learn how night shift-induced sleep debt affects oculomotor patterns, attentional state, and diagnostic performance in emergency radiologists.
The main questions it aims to answer are:
- Does sleep debt from a night shift alter oculomotor parameters, as eyes movements (speed and amplitude), fixation duration, pupil size?
- Does a night shift impact radiologists' diagnostic accuracy, attentional state, and perceived fatigue? Researchers will compare radiologists after a night shift (sleep-deprived) with the same radiologists after a night of rest (control) to see if fatigue-related changes affect both visual exploration strategies and diagnostic performance.
Participants will:
- Perform a guided saccade task assessed by eye tracking (primary endpoint),
- Read thoracic CT scans (with and without pulmonary embolism cases) to assess diagnostic performance and visual exploration patterns,
- Undergo EEG recording to measure attentional state,
- Complete self-report questionnaires on sleepiness and fatigue.
详细描述
Rationale Physician burnout is a significant problem, particularly for emergency physicians and radiologists working in emergency imaging. Over the past 15 years, the workload of 'emergency radiologists' has increased significantly, impacting their job satisfaction and perceived health. Night shifts and reduced recovery time disrupt the sleep-wake cycle, leading to decreased cognitive performance and increased stress. Fatigue at work is closely linked to a higher risk of medical errors. Radiologists face high demands on attention, pressure to report quickly, and the need to interpret complex images, all of which contribute to errors.
Eye tracking has been used to analyze radiologists' visual search patterns, However, few studies have examined the impact of work patterns, particularly night shifts, on these behaviors. It is important to study the effect of night shift fatigue on radiologists' eye movement patterns and cognitive abilities, and to relate these findings to their diagnostic performance.
Research Hypothesis The investigators hypothesize that eye movement patterns and attention during medical image reading will be influenced by sleep debt and ocular fatigue induced by night shifts.
The investigators therefore aim to compare radiologists' eye movement patterns during medical image reading, as measured by oculometry, and their attentional state, as measured by EEG, according to their sleep debt within the IMADIS Group.
STUDY DESIGN Study type Longitudinal (non-randomized controlled trial design), single-center, multi-site study (IMADIS Group)
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Health Services Research
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Associate radiologists at IMADIS Group
- •In their current position for at least one year
- •Working at one of the IMADIS Group on-call centers
- •Performing night shifts during the study period
- •Able to wear an actimeter watch during the study period (it may be removed during certain procedures, but must be put back on afterwards)
- •Having given their free and informed consent to participate in the study
- •Non- inclusion criteria:
- •Leave during the study period
- •Pregnant women, women in labor, or breastfeeding women
- •Subjects wearing glasses or contact lenses
排除标准
- •- Having slept more than 6 hours during the night shift
研究组 & 干预措施
Study cohort
Radiologists taking measurements after a night shift and after a night's rest
干预措施: Electroencephalogram (Device)
Study cohort
Radiologists taking measurements after a night shift and after a night's rest
干预措施: Actigraphy (Device)
Study cohort
Radiologists taking measurements after a night shift and after a night's rest
干预措施: Eye Tracking (Device)
Study cohort
Radiologists taking measurements after a night shift and after a night's rest
干预措施: Questionnaires (Other)
结局指标
主要结局
Comparison of slope of the relationship between maximum speed and saccade magnitude
时间窗: Comparison of measurement obtained during an 8-minute guided saccade task during the two measurement phases : after a night call and after a night's rest
Slope of the relationship between maximum saccadic speed and saccade magnitude This parameter reflects the dynamics of saccadic eye movements. It is derived from the main sequence, which describes the linear relationship between the amplitude of a saccade (in degrees of visual angle) and its maximum velocity (in degrees per second). The slope quantifies how rapidly maximum saccadic speed increases with increasing saccade magnitude. A steeper slope indicates faster oculomotor responses for larger saccades, whereas a reduced slope may reflect fatigue, reduced alertness, or impaired oculomotor function.
次要结局
- Assessment of self reported momentary sleepiness(Questionnaire is completed before each measurement phase (after a night on call or after a night of rest))
- Assessment of self reported habitual daytime sleepiness(Questionnaire is completed before each measurement phase (after a night on call or after a night of rest))
- Assessment of self reported mental fatigue(Questionnaire is completed before each measurement phase (after a night on call or after a night of rest))
- Assessment of self reported insomnia(Questionnaire is completed before each measurement phase (after a night on call or after a night of rest))
- Assessment of self reported chronotype(The MEQ questionnaire is completed during inclusion)
- Comparison of duration of fixations on areas of interest, in milliseconds(Comparison of measurements taken on the morning after a night shift and on the morning after a night of rest)
- Comparison of percent of embolisms detected(Comparison of measurements taken on the morning after a night shift and on the morning after a night of rest)
- Comparison of attentional systems(Comparison of measurement taken on the morning after a night shift and on the morning after a night of rest)
- Comparison of pupil diameter(Comparison of measurements taken on the morning after a night shift and on the morning after a night of rest)