Anesthesiology Resident Night Float Duty Alters Sleep Patterns: An Observational Study.

Area of Science:

• Medical Sciences
• Sleep Medicine
• Anesthesiology

Background:

• Residency programs use night float systems to comply with duty hour restrictions.
• The impact of night float on resident sleep patterns and quality remains under-described.
• This study investigated the effects of night float on sleep in anesthesia residents.

Purpose of the Study:

• To determine the influence of night float on resident sleep patterns.
• To assess the quality of sleep during and after night float rotations.
• To test the hypothesis that sleep decreases during night float and recovers post-shift.

Main Methods:

• A single-center observational study involving 30 anesthesia residents.
• Electroencephalography (EEG) sleep patterns were monitored using the ZMachine Insight monitor.
• Sleep data were collected during baseline, six consecutive night float shifts, and a three-day recovery period.

Main Results:

• Total sleep time decreased by 1.4 hours during night float compared to baseline (P < 0.001).
• Significant reductions were observed in light, deep, and rapid eye movement (REM) sleep during night float.
• Following night float, while total sleep time approached baseline, deep and REM sleep remained significantly decreased.

Conclusions:

• Six consecutive night float shifts lead to decreased sleep quantity and altered sleep architecture.
• A three-day recovery period is insufficient for anesthesia residents to regain baseline levels of deep and REM sleep.
• Findings highlight potential risks associated with prolonged night float on resident sleep health.