• Effect of listening to Nellie the Elephant during CPR training on performance of chest compressions by lay people: randomised crossover trial

      Rawlins, Lettie; Woollard, Malcolm; Williams, Julia; Hallam, Phil (2009-12-14)
      Objectives To determine whether listening to music during cardiopulmonary resuscitation (CPR) training increases the proportion of lay people delivering chest compressions of 100 per minute. Design Prospective randomised crossover trial. Setting Large UK university. Participants 130 volunteers (81 men) recruited on an opportunistic basis. Exclusion criteria included age under 18, trained health professionals, and cardiopulmonary resuscitation (CPR) training within the past three months. Interventions Volunteers performed three sequences of one minute of continuous chest compressions on a skill meter resuscitation manikin accompanied by no music, repeated choruses of Nellie the Elephant (Nellie), and That’s the Way (I like it) (TTW) according to a pre-randomised order. Main outcome measures Rate of chest compressions delivered (primary outcome), depth of compressions, proportion of incorrect compressions, and type of error. Results Median (interquartile range) compression rates were 110 (93-119) with no music, 105 (98-107) with Nellie, and 109 (103-110) with TTW. There were significant differences within groups between Nellie v no music and Nellie v TTW (P<0.001) but not no music v TTW (P=0.055). A compression rate of between 95 and 105 was achieved with no music, Nellie, and TTW for 15/130 (12%), 42/130 (32%), and 12/130 (9%) attempts, respectively. Differences in proportions were significant for Nellie v no music and Nellie v TTW (P<0.001) but not for no music v TTW (P=0.55). Relative risk for a compression rate between 95 and 105 was 2.8 (95% confidence interval 1.66 to 4.80) for Nellie v no music, 0.8 (0.40 to 1.62) for TTW v no music, and 3.5 (1.97 to 6.33) for Nellie v TTW. The number needed to treat for listening to Nellie v no music was 5 (4 to 10)—that is, the number of cardiac arrests required during which lay responders listen to Nellie to facilitate one patient receiving compressions at the correct rate (v no music) would be between four and 10. A greater proportion of compressions were too shallow when participants listened to Nellie v no music (56% v 47%, P=0.022). Conclusions Listening to Nellie the Elephant significantly increased the proportion of lay people delivering compression rates at close to 100 per minute. Unfortunately it also increased the proportion of compressions delivered at an inadequate depth. As current resuscitation guidelines give equal emphasis to correct rate and depth, listening to Nellie the Elephant as a learning aid during CPR training should be discontinued. Further research is required to identify music that, when played during CPR training, increases the proportion of lay responders providing chest compressions at both the correct rate and depth. https://www.bmj.com/content/339/bmj.b4707. This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/ DOI http://dx.doi.org/10.1136/bmj.b4707
    • Keeping the beat: does music improve the performance of chest compression by lay persons?

      Rawlins, Lettie; Woollard, Malcolm; Hallam, Phil; Williams, Julia (2011-03)
      Background Early bystander cardiopulmonary resuscitation (CPR) increases survival from out-of-hospital cardiac arrest. Simplifying training can improve skill retention and confidence. A recent pilot study suggested music may help health professionals perform CPR. The song ‘Nellie the Elephant’ (tempo 100 bpm) is sometimes used to encourage compression rates in accordance with Resuscitation Council guidelines. This study investigates whether music helps lay persons perform compressions at 100 per minute. Methods This randomised cross-over trial opportunistically recruited lay volunteers who performed three sequences, pre-randomised for order, of one minute of continuous chest compressions on a recording manikin accompanied by no music (NM) and repeated choruses of ‘Nellie the Elephant’ (Nellie), and ‘That's The Way (I Like It)' (TTW). Results Of 130 participants, 62% were male, median age was 21 (IQR 20 to 25), 72% had no previous CPR training. Mode and IQR for compression rate were NM 111 (93 to 119); Nellie 106 (98 to 107), (TTW) 109 (103 to 110). Within-groups differences were significant for Nellie vs NM and Nellie vs TTW (p<0.001) but not NM vs TTW (p=0.055). A compression rate of 95 to 105 was achieved with NM, Nellie, and TTW for 15/130 (12%), 42/130 (32%) and 12/130 (9%) attempts respectively. Differences in proportions were significant for Nellie vs. NM and Nellie vs TTW (p<0.0001) but not for NM vs TTW (p=0.55). Relative ‘risk’ for compression rate between 95 and 105 was 2.8 for Nellie vs NM (95%CI 1.66 to 4.80), 0.8 for TTW vs NM (95% CI 0.40 to 1.62), and 3.5 for Nellie vs. TTW (95% CI 1.97 to 6.33). Conclusion and recommendations ‘Listening to Nellie’ (vs TTW or no music) significantly increased the proportion of lay persons achieving compression rates close to the 100 bpm guideline. Playing it during training and ‘real’ CPR may help rescuers deliver correct compression rates. https://emj.bmj.com/content/emermed/28/3/e1.18.full.pdf This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/ http://dx.doi.org/10.1136/emj.2010.108605.6