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Table 2 Insertion data and success rates with manual needle, B.I.G. and EZ-IO:

From: Emergency intraosseous access in a helicopter emergency medical service: a retrospective study

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%

  1. 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).
  2. * Two patients had the first attempt with a Manual needle, and the second attempt with a B.I.G.
  3. ** 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".
  4. IO - Intraosseous.