Obstructive sleep apnea (OSA) and driving safety.

Area of Science:

• Neurology
• Sleep Medicine
• Occupational Health

Background:

• Obstructive sleep apnea (OSA) is characterized by intermittent hypoxia and sleep fragmentation, leading to excessive daytime sleepiness (EDS) and cognitive impairment.
• Neuroimaging and neurophysiological studies suggest OSA-induced brain injury involves fronto-parietal disconnection and thalamocortical oscillator disruption, affecting attention, memory, and executive functions.
• OSA is a primary medical cause of EDS and is linked to a higher risk of motor vehicle accidents (MVAs) and work accidents.

Purpose of the Study:

• To highlight the significant impact of OSA, sleep deprivation (SD), and EDS on accident risk, particularly in professional drivers.
• To emphasize that EDS is an independent risk factor for accidents, beyond OSA and SD.
• To propose preventative measures including rest breaks, naps, and screening for OSA, EDS, and SD.

Main Methods:

• Review of neuroimaging and neurophysiological studies in OSA patients.
• Analysis of accident data correlating OSA, SD, and EDS with motor vehicle accidents (MVAs) and near-miss accidents (NMAs).
• Examination of risk factors in professional drivers, considering fatigue, sleep deprivation, and EDS.

Main Results:

• OSA leads to cognitive deficits and is a major cause of EDS.
• Individuals with OSA have a nearly twofold increased risk of work accidents and contribute to approximately 7% of MVAs among male drivers.
• EDS, OSA, and SD are independent risk factors for MVAs and NMAs, with risk severely increasing when multiple factors are present.

Conclusions:

• OSA, SD, and EDS significantly elevate the risk of accidents, especially in professional drivers.
• Rest breaks and naps are effective protective strategies against MVAs and NMAs.
• Screening for OSA, EDS, and SD should be a primary prevention strategy to mitigate accident risks.