World Journal of Emergency Medicine ›› 2020, Vol. 11 ›› Issue (4): 238-245.doi: 10.5847/wjem.j.1920-8642.2020.04.006
Special Issue: Cardiopulmonary Resuscitation
• Original Article • Previous Articles Next Articles
Xue-jie Dong1, Lin Zhang1(), Yue-lin Yu1, Shu-xiao Shi1, Xiao-chen Yang1, Xiao-qian Zhang2, Shuang Tian2, Helge Myklebust3, Guo-hong Li1, Zhi-jie Zheng4
Received:
2020-01-12
Accepted:
2020-06-01
Online:
2020-10-01
Published:
2020-10-01
Contact:
Lin Zhang
E-mail:zhanglynn@sjtu.edu.cn
Xue-jie Dong, Lin Zhang, Yue-lin Yu, Shu-xiao Shi, Xiao-chen Yang, Xiao-qian Zhang, Shuang Tian, Helge Myklebust, Guo-hong Li, Zhi-jie Zheng. The general public’s ability to operate automated external defibrillator: A controlled simulation study[J]. World Journal of Emergency Medicine, 2020, 11(4): 238-245.
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URL: http://wjem.com.cn//EN/10.5847/wjem.j.1920-8642.2020.04.006
Table 1
Assessment of correct critical actions in the general public aged 18-65 years, n (%)
Critical actions | Pre-training (n=94) | Post-training (n=94) | Three-month follow-upa (n=82) | P-valueb (pre-training vs. post-training) | P-valueb (post-training vs. follow-up) |
---|---|---|---|---|---|
Successful defibrillations | 14 (14.9) | 66 (70.2) | 41 (50.0) | <0.001 | 0.01 |
Turning on the AED | 94 (100.0) | 94 (100.0) | 82 (100.0) | - | - |
Baring the chest | 59 (62.8) | 94 (100.0) | 75 (91.4) | <0.001 | 0.01 |
Placing the electrodes | 66 (70.2) | 94 (100.0) | 78 (95.1) | <0.001 | 0.05 |
Correct electrode placement | 17 (18.1) | 72 (76.6) | 44 (53.7) | <0.001 | <0.01 |
Attaching the connector | 94 (100.0) | 94 (100.0) | 82 (100.0) | - | - |
Clear while AED analyzes the rhythm | 72 (76.6) | 86 (91.5) | 76 (92.7) | 0.005 | 0.79 |
Clear while AED delivers the shock | 87 (92.6) | 93 (98.9) | 79 (96.3) | 0.070 | 0.34 |
Pressing the shock button | 94 (100.0) | 94 (100.0) | 82 (100.0) | - | - |
Resuming CPR after shock | 9 (9.6) | 82 (87.2) | 46 (56.1) | <0.001 | <0.01 |
Table 2
Proportion of successful defibrillations and correct critical actions by age groups (years) and three skill assessment phases, n (%)
Critical actions | Pre-training | Post-training | Three-month follow-upa | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
18-24 (n=32) | 25-54 (n=34) | 55-65 (n=28) | P-valueb | 18-24 (n=32) | 25-54 (n=34) | 55-65 (n=28) | P-valueb | 18-24 (n=31) | 25-54 (n=28) | 55-65 (n=23) | P-valueb | |
Successful defibrillations | 8 (25.0) | 4 (11.8) | 2 (7.1) | 0.15 | 23 (71.9) | 24 (70.6) | 19 (67.9) | 0.96 | 17 (54.8) | 18 (64.3) | 6 (26.1) | 0.02 |
Turning on the AED | 32 (100.0) | 34 (100.0) | 28 (100.0) | - | 32 (100.0) | 34 (100.0) | 28 (100.0) | - | 31 (100.0) | 28 (100.0) | 23 (100.0) | - |
Baring the chest | 27 (84.4) | 25 (73.5) | 7 (25.0) | <0.01 | 32 (100.0) | 34 (100.0) | 28 (100.0) | - | 30 (96.8) | 26 (92.9) | 19 (82.6) | 0.37 |
Placing the electrodes | 31 (96.9) | 26 (76.5) | 9 (32.1) | <0.01 | 32 (100.0) | 34 (100.0) | 28 (100.0) | - | 31 (100.0) | 27 (96.4) | 20 (87.0) | 0.06 |
Correct electrode placement | 10 (31.3) | 4 (11.8) | 3 (10.7) | 0.06 | 27 (84.4) | 24 (70.6) | 21 (75.0) | 0.41 | 17 (54.8) | 18 (64.3) | 6 (26.1) | 0.02 |
Attaching the connectors | 32 (100.0) | 34 (100.0) | 28 (100.0) | - | 32 (100.0) | 34 (100.0) | 28 (100.0) | - | 31 (100.0) | 28 (100.0) | 23 (100.0) | - |
Clear while AED analyzes the rhythm | 27 (84.4) | 27 (79.4) | 18 (64.3) | 0.17 | 27 (84.4) | 33 (97.1) | 26 (92.9) | 0.18 | 28 (90.3) | 28 (100.0) | 20 (87.0) | 0.17 |
Clear while AED delivers the shock | 31 (96.9) | 34 (100.0) | 22 (78.6) | 0.01 | 31 (96.9) | 34 (100.0) | 28 (100.0) | 0.38 | 28 (90.3) | 28 (100.0) | 23 (100.0) | 0.11 |
Pressing the shock button | 32 (100.0) | 34 (100.0) | 28 (100.0) | - | 32 (100.0) | 34 (100.0) | 28 (100.0) | - | 31 (100.0) | 28 (100.0) | 23 (100.0) | - |
Resuming CPR after shock | 3 (9.4) | 4 (11.8) | 2 (7.1) | 0.91 | 26 (81.3) | 30 (88.2) | 26 (92.9) | 0.43 | 22 (71.0) | 20 (71.4) | 4 (17.4) | <0.01 |
Figure 2.
Assessment of AED electrode placement in the study participants by age group. The star icons represented the standard electrode positions that were placed according to the AED’s instructional diagrams. Placement of AED electrode by participants within 5 cm of this standard was defined as correct. The coordinates (10, 0) and (-10, 0) represented the manikin’s left and right nipples, respectively.
Figure 3.
Timelines of successful defibrillations by the general public aged 18-65 years. t1: start of baring chest; t2: AED power on; t3: start of attaching electrodes; t4: start of inserting the plug; t5: AED indicating a shock; t6: delivering the shock; and t7: resuming CPR. Median values are shown (interquartile range). P-values were derived using the Mann-Whitney U-test. A P-value <0.05 was considered statistically significant.
Table 3
Comparison of time intervals in successful defibrillations by age groups (years) and three skill assessment phases, seconds, M (P25-P75) a
Time intervals | Pre-training | Post-training | Three-month follow-up | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
18-24 (n=8) | 25-54 (n=4) | 55-65 (n=2)b | P-valuec | 18-24 (n=23) | 25-54 (n=24) | 55-65 (n=19) | P-valuec | 18-24 (n=17) | 25-54 (n=18) | 55-65 (n=6) | P-valuec | |
Time for power on | 79 (20-155) | 28 (13-92) | 18, 39 | 0.06 | 26 (11-52) | 17 (10-43) | 20 (12-56) | 0.38 | 31 (22-53) | 29 (17-52) | 32 (9-41) | 0.07 |
Time to start baring chest | 42 (31-65) | 44 (41-51) | 1, 19 | 0.55 | 12 (4-17) | 16 (6-25) | 14 (1-22) | 0.48 | 4 (1-11) | 9 (3-24) | 15 (10-31) | 0.14 |
Time for baring the chest | 12 (8-15) | 8 (7-10) | 4, 5 | 0.08 | 7 (6-8) | 7 (6-9) | 6 (6-7) | 0.54 | 6 (6-10) | 8 (6-10) | 8 (7-8) | 0.78 |
Time for placing the electrodes | 24 (18-36) | 23 (17-45) | 14, 17 | 0.03 | 16 (13-23) | 17 (11-23) | 16 (13-19) | 0.60 | 20 (18-22) | 19 (14-23) | 16 (13-18) | 0.02 |
Time for inserting the plug | 8 (4-11) | 6 (3-8) | 5, 7 | 0.94 | 4 (2-4) | 3 (2-6) | 3 (3-5) | 0.10 | 4 (3-7) | 3 (2-5) | 6 (4-6) | 0.41 |
Time for AED indicating a shock | 113 (99-177) | 105 (100-125) | 81, 88 | 0.09 | 73 (62-83) | 79 (66-86) | 76 (72-82) | 0.96 | 78 (73-87) | 74 (63-90) | 86 (72-103) | 0.33 |
Time for response to shock instruction | 3 (3-4) | 5 (3-5) | 4, 4 | 0.31 | 2 (1-3) | 3 (2-4) | 3 (2-4) | 0.01 | 4 (2-4) | 4 (2-5) | 5 (3-6) | 0.56 |
Time for shock | 117 (102-181) | 110 (105-128) | 85, 92 | 0.09 | 76 (63-86) | 82 (69-91) | 79 (77-86) | 0.90 | 80 (76-90) | 78 (68-95) | 93 (75-106) | 0.38 |
Time for resuming CPR after shock | 6 (1-12) | 15 (12-15) | 16, 16 | 0.23 | 9 (6-10) | 9 (8-10) | 10 (9-12) | 0.01 | 12.5 (6-20) | 9 (8-11) | 9 (9-9) | 0.16 |
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