Paramedic perception of elapsed field time.

Area of Science:

• Emergency Medicine
• Paramedic Studies
• Time Perception Research

Background:

• Assessing the duration of emergency medical services (EMS) field procedures is crucial for operational efficiency.
• Understanding paramedic time perception is vital for improving response accuracy and patient care.
• Previous studies have not comprehensively documented actual field procedure times and subjective perceptions.

Purpose of the Study:

• To objectively record the time taken for various emergency field procedures by urban paramedics.
• To compare paramedics' subjective perception of elapsed time with objectively measured times during emergency runs.
• To identify discrepancies in time perception and their potential impact on EMS operations.

Main Methods:

• An independent observer monitored 118 emergency runs with city paramedic teams.
• Data collection included response, scene, and transport times, as well as specific procedure durations (e.g., defibrillation, IV start).
• Paramedic time perception was assessed by comparing their estimates to observer-recorded times.

Main Results:

• Average response time was 5.4 minutes, scene time 11.2 minutes, and transport time 9.5 minutes.
• Specific procedures ranged from 1.5 minutes (defibrillation) to 5.0 minutes (IV start).
• Paramedics' time perception errors averaged 20% absolute difference, with greater inaccuracies during scene time estimation; they overestimated short runs and underestimated long runs.

Conclusions:

• This study provides realistic field procedure times for urban paramedic services.
• Significant discrepancies exist between perceived and actual elapsed time, particularly during scene management.
• The findings highlight the need for strict medical oversight and potentially enhanced training to improve time estimation accuracy in high-stress EMS environments.