Background; BLS algorithms for health care providers or experience personnel recommended by AHA, European Resuscitation Council (ERC), and Japanese Resuscitation Council (JPN) differ with respect to the sequence of assessment and procedures. The differences may affect accuracy to diagnose cardiac arrest and quickness to start chest compression. We compared BLS algorithms recommended by these organizations with respect to accuracy of respiratory/circulatory assessment, and quickness to start chest compression using a computed manikin model.
Methods; Thirty three subjects (16 physicians and 17 medical students) were enrolled. The Sim-Man (Laerdal) was used to develop 2 scenarios (no pulse/no breathing, with pulse 60/min and breathing 10/min). The three algorithms and 2 scenarios were randomly assigned to the subject, and the accuracy to diagnose cardiac arrest and the time from confirmation of loss of consciousness to starting chest compression were evaluated.
Results; The rates of incorrect assessment of respiratory/circulatory status were AHA;9.8% (13 out of 132), ERC;9.1%(12 out of 132) and JPN;6.8%(9 out of 132)(n.s. among algorithms). When the results were analyzed with respect to clinical experiences of the subjects, i.e. physicians vs. medical students, significant differences were found between the groups: AHA;17.2% (11 out of 64), ERC;15.6% (10 out of 64), JPN;12.5% (8 out of 64) in students, whereas AHA;2.9% (2 out of 68), ERC;2.9% (2 out of 68), JPN;1.5% (1 out of 68) in physicians* (* p<0.05 vs. students). The time to starting chest compression were AHA;27.8±5.1 sec, ERC;18.6±3.2** sec, JPN;23.7±4.2 sec (**p<0.05 vs. AHA and JPN), and no significant differences were found between physicians and students.
Conclusions; No differences were found in accuracy of respiratory and circulatory assessment among the algorithms, although it may be influenced by clinical experiences of evaluators. The BLS algorithm starting CPR from chest compression such as ERC guidelines may reduce the time of no-flow status in cardiac arrest.
Clinical Experiences with Induced Cardiac Arrest During Intracardiac Surgical Procedures*
