Table 3.
Comparison of task-switching time, handheld Butterfly vs GE cart-based ultrasound device.
| Task switching | Butterfly | GE | Difference | 95% CI | P-value |
|---|---|---|---|---|---|
| Total time 1 | |||||
| Mean, (SD) | 5.55 (3.51) | 9.57 (3.73) | −4.02 | (−5.93 – −2.12) | <0.0001 |
| Median, (IQR) | 4.28 (3.63 – 5.62) | 8.52 (7.17 – 9.57) | −4.23 | (−5.48 – −2.98) | <0.0001 |
| Total time 2 | |||||
| Mean, (SD) | 5.32 (3.54) | 7.13 (3.51) | −1.81 | (−3.67 – 0.04) | 0.0556 |
| Median, (IQR) | 4.08 (3.43 – 5.35) | 5.8 (4.73 – 7.67) | −1.72 | (−2.78 – −0.65) | <0.0001 |
| Switching 1 | |||||
| Mean, (SD) | 0.13 (0.06) | 0.30 (0.08) | −0.17 | (−0.21 – −0.13) | <0.0001 |
| Median, (IQR) | 0.13 (0.08 – 0.17) | 0.30 (0.23 – 0.35) | −0.17 | −0.22 – −0.12 | <0.0001 |
| Switching 2 | |||||
| Mean, (SD) | 0.09 (0.08) | 0.08 (0.10) | 0.01 | (−0.04 – 0.06) | 0.6893 |
| Median, (IQR) | 0.08 (0.00 – 0.13) | 0.00 (0.0 – 0.2) | 0.08 | (−0.02 – 0.18) | 0.0825 |
| Switching 3 | |||||
| Mean, (SD) | 0.12 (0.05) | 0.33 (0.23) | −0.20 | (−0.30 – −0.11) | <0.0001 |
| Median, (IQR) | 0.10 (0.10 – 0.13) | 0.28 (0.23 – 0.38) | −0.18 | (−0.23 – −0.14) | <0.0001 |
| Total switching | |||||
| Mean, (SD) | 0.34 (0.14) | 0.71 (0.31) | −0.37 | (−0.37 – −0.50) | <0.0001 |
| Median, (IQR) | 0.33 (0.23 – 0.42) | 0.67 (0.48 – 0.82) | −0.33 | (−0.45 – −0.21) | <0.0001 |
Total time 1 (minutes): includes transport and plug-in.
Total time 2 (minutes): excludes transport and plug-in.
Switching 1 (minutes): cardiac to abdomen preset.
Switching 2 (minutes): abdomen to abdomen deep preset.
Switching 3 (minutes): abdomen deep to lung preset.
CI, confidence interval; SD, standard deviation; IQR, interquartile range.