Clinical and Operational Effects of Emergency Department Crowding: A Systematic Review

Area of Science:

• Emergency Medicine
• Healthcare Management
• Public Health

Background:

• Emergency department (ED) crowding is a global issue stemming from capacity-demand mismatches.
• It is linked to care delays, service quality reduction, and adverse patient outcomes.
• Understanding its impact on patient care and system performance is crucial.

Purpose of the Study:

• To synthesize evidence on the effects of ED crowding on patient outcomes and care processes.
• To evaluate the impact of ED crowding on healthcare system performance.
• To identify areas for strategic intervention.

Main Methods:

• Systematic review of thirteen observational studies.
• Analysis of effects on mortality, care timeliness, length of stay, readmissions, errors, and staff impacts.
• Assessment of operational strain and resource utilization.

Main Results:

• ED crowding consistently leads to delayed clinical processes (e.g., analgesia, antibiotics, stroke/sepsis care).
• Increased ED and inpatient length of stay, higher hospital-acquired complications, and diagnostic delays were observed.
• Mortality association was inconsistent; operational strain and resource utilization were heightened.

Conclusions:

• ED crowding adversely affects emergency care timeliness and quality.
• It contributes to broader healthcare system inefficiencies.
• Strategies to improve patient flow, bed capacity, and reduce boarding are essential.