Table 2.
Insertion data and success rates with manual needle, B.I.G. and EZ-IO:
| IO device | Number of patients who recieved IO | Number of insertions | Success on 1.attempt |
Success on 2. attempt | Success on 3. attempt | Failed insertions | First attempt success ** (95%CI) | Overall success *** (95%CI) |
|---|---|---|---|---|---|---|---|---|
| Manual needle | 5* | 6 | 2 | 1 | 0 | 3 | 40% (5-85) | 50% (12-88) |
| B.I.G. | 18* | 22 | 10 | 1 | 1 | 10 | 56% (31-79) | 55% (32-76) |
| EZ-IO | 49 | 50 | 47 | 1 | 0 | 2 | 96% (86-100) | 96% (86-100) |
| Total number | 70* | 78 | 59 | 3 | 1 | 15 | 84% | 81% |
Successes on first attempt were compared using exact chi-square test. The contrasts between EZ-IO® and the manual needle/Bone Injection Gun were significant (p < 0.01/p < 0.001). Manual needle vs. B.I.G. was not significant (p = 0.64).
* Two patients had the first attempt with a Manual needle, and the second attempt with a B.I.G.
** First attempt success is calculated using the "Success on 1. attempt" related to "Number of patients who received IO". *** Overall success is calculated using all successful attempts related to "Number of insertions".
IO - Intraosseous.