Shift Hours' Impact on Fatigue and Tracking of Eye Dynamics

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.

Conditions

• Sleep Deprivation
• Sleepiness
• Eye-Tracking Technology
• Radiologists
• Tomography
• Electroencephalography

Interventions

DEVICE

Electroencephalogram

EEG measurement to assess attentional state

DEVICE

Actigraphy

Evaluation of sleep-wake phases 24 hours prior to eye tracking measurement

DEVICE

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.

OTHER

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

Sponsors & Collaborators

• Lyon Neuroscience Research Center (CRNL)

  collaborator UNKNOWN

• IMADIS Technologies et Services

  lead INDUSTRY

Principal Investigators

• Guillaume GORINCOUR, MD, PhD · IMADIS Technologies et Services

Study Design

Allocation

NA

Purpose

HEALTH_SERVICES_RESEARCH

Masking

NONE

Model

SINGLE_GROUP

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2025-09-15

Primary Completion

2026-05-15

Completion

2026-05-15

Countries

• France

Study Locations