Introduction
The Laerdal MiniAnne personal resuscitation manikin with a self-instruction video can effectively teach lay persons basic life support (BLS) in less than 30 minutes [1]. The aim of this study was to assess if the quality of BLS could be improved by adding a counting device to the manikin. The aim of the counting device, which counts the number of correct chest compressions and mouth-to-mouth (MTM) ventilations during two minutes, is to give feedback and thereby improve performance.