The Accreditation Council for Graduate Medical Education (ACGME) in the United States limits resident physicians' workweek to 80 hours. Several studies have investigated the association between first year residents (i.e., interns, PGY1), worked hours and patient safety. This study includes residents beyond the first year (i.e., PGY2+). Nearly 5,000 PGY2+ residents reported the number of hours worked, patient safety outcomes, and resident health and outcomes. Working more than 60 hours in a week significantly increased the risk of a medical error resulting in patient death. The authors suggest weekly workweek limits should be significantly reduced, such as they are in the United Kingdom.

Fatigue and sleep deprivation among healthcare workers can increase the risk of errors. This prospective study including 60 attending surgeons from departments of surgery or obstetrics and gynecology at eight hospitals found that sleep deficiency was not associated with greater numbers of errors during procedures performed the next day. However, non-technical skill performance, situational awareness, and decision making were adversely associated with sleep deficiency.  

Patient safety improvements must consider the complexities of care delivery to achieve lasting change. This commentary discusses recent evidence examining the effect of duty hour limit adjustments. The authors highlight challenges regarding research design on this medical education policy change and how it affects learner and patient experience. They suggest caution in applying the study conclusions. 

The Accreditation Council for Graduate Medical Education (ACGME) includes work hour restrictions in its Common Program Requirements. The focus of this review is the impact of resident work hour restrictions on patient- and resident-level outcomes. Shorter shift hours were associated with some improved resident outcomes and but no association with patient outcomes.

Several countries have resident duty hour (RDH) restrictions and there are numerous publications examining the impact of RDH on patient safety. This study used two online discussion forums (one primarily in the United States and the other in Canada) to assess resident perceptions of RDH. Themes included its impact on residents’ education and clinician well-being, and, worryingly, discussions of not reporting RDH violations.

To reduce medical errors caused by fatigue, the Accreditation Council for Graduate Medical Education (ACGME) adopted duty hour restrictions for ACGME-accredited residency programs; however, other healthcare fields have not yet done so. This review presents the limited existing evidence for regulating duty hours for radiologists and proposes that additional research needs to be completed before implementing restrictions.

Clinician workload has been linked with poor patient outcomes. This retrospective cohort study assessed the outcomes for patients undergoing coronary artery bypass graft (CABG) performed as a surgeons’ first versus non-first procedure of the day. Findings suggest that prior workload adversely affected outcomes for patients undergoing CABG surgery, with increases in adverse events, myocardial infarction, and stroke compared to first procedures.

Physician fatigue can inhibit decision-making and contribute to poor performance. This cross-sectional study examined surgical procedures performed between January 2010 and August 2020 across 20 high-volume hospitals in the United States to determine the association between surgeon fatigue, operating overnight and outcomes for operations performed by the same surgeon the next day. No significant associations were found between overnight surgeries and surgical outcomes for procedures performed the next day.

In 2011, the Accreditation Council for Graduate Medical Education (ACGME) introduced a 16-hour shift limit for first-year residents. Recent studies found that these duty hour requirements did not yield significant differences in patient outcomes and the ACGME eliminated the shift limit for first-year residents in 2017. To assess the impact of work-hour limits on medical errors, this study prospectively followed two cohorts of resident physicians matched into US residency programs before (2002-2007) and after (2014-2016) the introduction of the work-hour limits. After adjustment for potential confounders, the work-hour limit was associated with decreased risk of resident-reported significant medical errors (32% risk reduction), reported preventable adverse events (34% risk reduction), and reported medical errors resulting in patient death (63% risk reduction).

Many hospitals have adopted a 12-hour work shift for nurses and some studies have shown a resulting increase in burnout and decrease in patient safety. In this study, researchers assessed simulated nursing performance, cognition, and sleepiness in day nurses and night nurses who worked three consecutive 12-hour shifts. Overall results indicated nurses on both shifts mostly maintain their abilities on the simulated nursing performance assessment despite reporting increased sleepiness and fatigue. However there was more individual variation in cognition and some domains of performance.

In 2011, the Accreditation Council for Graduate Medical Education (ACGME) updated the duty hour restrictions (DHR) for medical residents to increase resident well-being. This review focused on surgical patient outcomes, resident case volume, and resident quality of life following the implementation of the 2011 update. Results showed DHR did not improve patient safety or surgical resident quality of life. The authors suggest future revisions meant to improve resident well-being not focus solely on hours worked in a single shift or week.

Healthcare workers are facing occupational fatigue stemming from the COVID-19 pandemic (e.g., burnout, stress) as well as fatigue related to ongoing symptoms of the virus (“long COVID”). This article discusses preventive and proactive leadership strategies to address both types of fatigue, including screening for fatigue, providing reasonable accommodations for healthcare workers struggling with fatigue, stress mediation, and establishing organizational culture supporting sleep and rest.

Overnight coverage creates opportunities for increasing resident autonomy but can carry risks for patient safety.  This study found that the presence of overnight hospitalists was associated with fewer resident barriers to contacting supervising physicians overnight but that other barriers during overnight coverage – such as technological barriers and organizational culture – influence residents seeking help from supervising physicians.

Reducing resident shift duration can improve resident health and patient safety. This study found that resident shifts limited to 16 hours can reduce performance impairment and medical errors, compared to extended work shifts (24+hours).

Recent duty hour reforms are intended to improve patient safety and resident well-being. This study explored whether resident performance declines as a function of consecutive overnight shifts, but results indicate no significant trend in overnight report discrepancies between the night float resident and the daytime attending.   

Human factors, such as cognitive load, are main contributors to prescribing errors. This study assessed the relationship between medication prescribing errors and a physician’s workload, successive work shifts, and prescribing experience. The researchers reviewed presumed medication errors flagged by a computerized decision support system (CDSS) in acute care settings (excluding intensive care units) and found that longer hours and less experience in prescribing specific medications increased the risk of prescribing errors.

Extended work shifts for nurses and physicians have been linked to increased risk of errors. In this systematic review, the authors discuss the impact of shift work disorder on errors and safety implications for radiographers. Studies suggested a positive correlation between errors and increased mental and physical fatigue resulting from shift work or rapid shift rotation, however none of the identified studies focused specifically on radiology professionals.