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Table 2 Time to first shock, correct electrode pad positioning and safety aspects before and after brief general instruction in defibrillation

From: Minimal instructions improve the performance of laypersons in the use of semiautomatic and automatic external defibrillators

 

Device

 

Semiautomatic

Automatic

n

118

118

Age (mean ± SD)

21.1 ± 3.3

20.4 ± 2.3

Male (n [%])

45 (38.1%)

38 (32.2%)

First evaluation

   Time to shock (s; mean ± SD)

77 ± 20.4*†

85 ± 17.2†

   Not able to deliver shock (n [%])

6 (5.1%)‡

4 (3.4%)

   Incorrect pad positioning (n [%])

15 (12.7%)

19 (16.1%)‡

   Safe shock (n [%])

109 (92.4%)

113 (95.8%)

   Any other problemsa (n [%])

18 (15.3%)

12 (10.2%)

Second evaluation

   Time to shock (s; mean ± SD)

55 ± 10.3*

59 ± 9.1

   Not able to deliver shock (n [%])

0 (0%)

3 (2.5%)

   Incorrect pad positioning (n [%])

11 (9.3%)

3 (2.5%)

   Safe shock (n [%])

113 (95.8%)

115 (97.5%)

   Any other problemsa (n [%])

3 (2.5%)

2 (1.7%)

  1. Comparison of subjects using semiautomatic and automatic devices at different evaluations. aAny other problems as described in the study protocol. *P < 0.05, versus automatic device (t-test). †P < 0.05, versus second evaluation (t-test). ‡P < 0.05, versus second evaluation (McNemar test). SD, standard deviation.
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Critical Care

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