Optimizing CPR performance: the role of body composition and ergonomic positioning

Area of Science:

• Emergency Medicine
• Cardiology
• Biomedical Engineering

Background:

• High-quality cardiopulmonary resuscitation (CPR) is crucial for survival in prehospital cardiac arrest.
• Current CPR guidelines focus on compression depth, rate, and recoil, but individual anatomical and biomechanical factors are underexplored.
• Understanding these individual factors can optimize CPR effectiveness and inform emergency team member selection.

Purpose of the Study:

• To determine the optimal CPR position by analyzing individual positional conditions and anthropometric data.
• To enhance CPR effectiveness through personalized technique and team composition.
• To provide evidence-based recommendations for improving prehospital CPR quality.

Main Methods:

• A cross-sectional study involving 123 paramedic students.
• Collected anthropometric data (e.g., upper extremity length, biceps circumference, femur length) and CPR performance metrics (depth, frequency, rhythm) using a feedback-capable mannequin.
• Recorded and analyzed positional parameters (knee/hip angles, inter-knee distance) in relation to CPR outcomes.

Main Results:

• Male participants achieved significantly higher CPR quality scores than females.
• Positive correlations observed between BMI, upper extremity length, biceps circumference, and CPR quality.
• A moderate inter-knee position (shoulder-width) yielded superior compression depth and rhythm stability.

Conclusions:

• Anthropometric characteristics and positional factors significantly impact CPR performance.
• Individuals with specific physical profiles (e.g., greater muscle mass, longer limbs, higher BMI) may perform CPR more effectively.
• Adopting ergonomic positioning, such as a moderate knee stance, can improve CPR quality in prehospital settings.