Table 10.
Code Blue – cardiopulmonary arrest events
| Type of arrhythmia alarm | False alarms triggered by patients who experienced cardiopulmonary arrest
|
True alarms triggered by patients who experienced cardiopulmonary arrest
|
||
|---|---|---|---|---|
| Number of alarms triggered (% of total number of alarms in category); mean rank | P-value; additional statistics for significant results | Number of alarms triggered (% of total number of alarms in category); mean rank | P-value; additional statistics for significant results | |
| Accelerated ventricular | ||||
| Yes | 73 (1.8%); 356.9 | <0.001; U =1,090.5; z =−4.628; r =0.22 | 199 (85.5%); 304.5 | <0.001; U =1,667.0; z =−4.906; 0.23 |
| No | 4,068 (98.2%); 227.9 | 31 (13.5%); 229.2 | ||
| Asystole | ||||
| Yes | 31 (5.8%); 270.6 | 0.171; U =2,039.5; z =−1.369; r =0.06 | 28 (10.6%); 325.3 | <0.001; U =1,438.0; z =−6.297; r =0.29 |
| No | 503 (94.2%); 230.0 | 235 (89.4%); 228.7 | ||
| Pause | ||||
| Yes | 82 (4.2%); 379.1 | <0.001; U =846; z =−4.695; r =0.22 | 20 (9.5%); 282.2 | 0.001; U =1,912; z =−3.286; r =0.15 |
| No | 1,893 (95.8%); 227.4 | 257 (90.5%)229.8 | ||
| Ventricular bradycardia | ||||
| Yes | 18 (1.5%); 339.4 | <0.001; U =1,282.5: z =−6.029; r =0.28 | 9 (20.9%); 308.4 | <0.001; U =1,624.0; z =−6.798; r =0.32 |
| No | 1,204 (98.5%); 228.4 | 34 (79.1%); 229.1 | ||
| Ventricular fibrillation | ||||
| Yes | 4 (8.0%); 266.3 | 0.002; U =2,086.0; z =−3.103; r =0.15 | 53 (49.5%); 289.9 | <0.001; U =1,827.0; z =−6.194; r =0.29 |
| No | 46 (92.0%); 230.1 | 54 (50.5%); 229.6 | ||
| Ventricular tachycardia | ||||
| Yes | 39 (2.6%); 377.4 | <0.001; U =864.5; z =−4.266; r =0.20 | 31 (7.1%); 379.8 | <0.001; U =838.5; z =−7.768; r =0.36 |
| No | 3,333 (97.4%); 227.4 | 405 (92.9%); 227.4 | ||
| All six alarms compiled | ||||
| Yes | 298 (2.6%); 396.6 | <0.001; U =654.0; z =4.439; r =0.21 | 125 (22.9%); 309.1 | <0.001; U =1,616.5; z =6.858; r =0.32 |
| No | 11,047 (97.4%); 227.0 | 421 (77.1%); 229.1 | ||
Notes: Mann–Whitney U-test. Lines in bold depict statistically significant results with P<0.005. “Yes” = at least one alarm triggered by cardiopulmonary arrest patient in the category; 17 cardiopulmonary arrest events were experienced by 11 unique patients. Numerous arrhythmia alarms were triggered. Using nonparametric measurements, this table compares the number of true and false alarms in each of the six arrhythmia categories that were triggered in association with a cardiopulmonary arrest versus alarms triggered at other times. 2.4% of N=461. “No”= no false arrhythmia alarm triggered during cardiopulmonary arrest.