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Chest Compression Depth and Rate - Effect on Instructor Visual Assessment of Chest Compression Quality
Katsuya Nagafuchi1, Toru Hifumi2, Naoki Nishimoto3
1Emergency Medical Center, Kagawa University Hospital.
Summary
Certified instructors struggled to visually assess chest compression quality. Compression depth accuracy decreased as compression rate increased, highlighting a critical disconnect in CPR training.
Area of Science:
- Cardiology
- Medical Education
- Emergency Medicine
Background:
- Assessing cardiopulmonary resuscitation (CPR) quality is crucial for patient outcomes.
- Visual assessment of chest compression depth and rate is a common training method.
Purpose of the Study:
- To evaluate the accuracy of visual assessment of chest compression quality by certified instructors.
- To determine the association between perceived chest compression depth and rate.
Main Methods:
- Prospective, observational study involving 198 certified instructors.
- Visual assessment of 14 video scenarios with varying chest compression depths (adequate: 5-6 cm; inadequate: <5 cm) and rates (90-150/min).
- Instructors classified depth as adequate, deep, or inadequate, and rate as appropriate, fast, or slow.
Main Results:
- 56% of instructors misidentified adequate depth as deep at 120 compressions/min, with this tendency increasing with higher rates.
- 64.1% incorrectly determined 130 compressions/min as appropriate.
- Both perceived depth and rate significantly impacted correct response accuracy (P<0.01).
- A significant interaction between chest compression depth and rate was observed (P<0.01).
Conclusions:
- Visual assessment of chest compression depth is significantly influenced by the compression rate.
- Increased compression rates lead to a higher likelihood of misidentifying adequate depth as deep.
- Current visual assessment methods may be unreliable for evaluating CPR quality accurately.
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