Abstract 14180: Real-time Visual Feedback During Training Improves Lay People’s CPR Quality: A Randomized Controlled Manikin Study

Abstract

Introduction: It has been demonstrated that feedback devices could have a role in improving CPR quality, but the results regarding lay people are controversial. Hypothesis: Our aim is to verify whether the use of CPR feedback devices improves lay people’s CPR quality after a training course and if the final quality reached is influenced by the amount of time spent training with them. Methods: 450 lay participants to BLS-D courses were randomly divided into three groups with an allocation ratio 1:1:1; group 0 attended a course without any feedback, group 1 a course with 1 minute training with real-time visual feedback and group 10 a course with 10 minutes training with real-time visual feedback. There were no statistically significant differences among the three groups for the anthropometric variables. At the end of each course we recorded 1-min of compression-only CPR. Results: There was a statistically significant overall difference among the three groups. In particular, comparing group 0 vs group 1 and group 0 vs group 10 there was a significant improvement in the percentage of compressions with correct depth (66.6% (95%CI, 60.1-73.1) in gr.0 vs 77.8% (95%CI, 72.8-82.8) in gr.1, p=0.005 and 66.6% (95%CI, 60.1-73.1) in gr.0 vs 75.7% (95%CI, 70.7-80.8) in gr.10, p=0.022), in the percentage of compressions with complete chest recoil (71.7% (95%CI, 66.2-77.2) in gr. 0 vs 86.6% (95%CI, 82.4-90.8) in gr. 1, p<0.001 and 71.7% (95%CI, 66.2-77.2) in gr. 0 vs 88.8% (95%CI, 85.6-92.2) in gr. 10, p<0.001), in the percentage of compressions with correct hand position (93.2% (95%CI, 89.7-96.6) in gr.0 vs 98.2% (95%CI, 96.7-99.8) in gr.10, p<0.001 and 93.2% (95%CI, 89.7-96.6) in gr.0 vs 99.3% (95%CI, 98.6-100) in gr.10, p=0.002) and in Total CPR score (79.4% (95%CI, 75.5-83.2) in gr.0 vs 90.2% (95%CI, 87.8-92.5) in gr.1, p<0.001 and 79.4% (95%CI, 75.5-83.2) in gr.0 vs 92.5% (95%CI, 91-94) in gr.10, p<0.001) in the groups in which the feedback was used. Furthermore, there were no statistically significant differences for all the parameters between group 1 and group 10. Conclusions: Real-time visual feedback improves lay people CPR quality, thus could improve OHCA survival. 1-minute of feedback is sufficient to reach a better CPR quality and we suggest its use in every BLS-D course.