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Shift Hours' Impact on Fatigue and Tracking of Eye Dynamics
Sponsor: IMADIS Technologies et Services
Summary
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.
Key Details
Gender
All
Age Range
18 Years - Any
Study Type
INTERVENTIONAL
Enrollment
40
Start Date
2025-09-15
Completion Date
2026-05-15
Last Updated
2025-09-25
Healthy Volunteers
Yes
Conditions
Interventions
Electroencephalogram
EEG measurement to assess attentional state
Actigraphy
Evaluation of sleep-wake phases 24 hours prior to eye tracking measurement
Eye Tracking
Assessment of ocular parameters during controlled eye tracking: guided saccade task followed by analysis of chest scans to detect pulmonary embolism. Measurement of ocular saccade parameters (distance, velocity), fixation time and pupil diameter. Measurements performed twice: after a night on call and after a night of rest.
Questionnaires
Measurements of sleepiness (Karolinska Sleep Scale KSS, Epworth Sleep Scale ESS), mental fatigue (EVA Scale), insomnia (Insomnia Severity Index, ISI) and chronotype (Morningness Eveningness Questionnaire, MEQ) * Inclusion visit: MEQ * Before the first evaluation: ISI, KSS, ESS, EVA * Before the second evaluation: ISI, KSS, ESS, EVA
Locations (1)
IMADIS Technologies et Services
Lyon, France, France