Quality of basic life support when using different commercially available public access defibrillators

Table 2 BLS with the use of an AED in scenarios of persistent asystole

	Time until 1st chest compression [seconds]	Time until completion of 1st rhythm analysis [seconds]	Duration of rhythm analysis [seconds]	Interval between completion of 1st rhythm analysis and start of 2nd rhythm analysis [seconds]	No-flow fraction
(A) Heartsave PAD	58⁺ ± 2 ^D,E,H,I,+	50 ± 3^D,H,I	20 ± 1	140 ± 1^C	0.52 ± 0.03^C
(B) Philips HS1^§	112 ± 2^G	77 ± 3^C,G	11 ± 1^C,D,E,I	200 ± 1	0.71 ± 0^F
(C) Philips HS1^*	92 ± 2^G,+	78 ± 2^B,G,+	12 ± 0^B,D,E,I	140 ± 0^A	0.50 ± 0^A,+
(D) Lifeline VIEW	64 ± 1^A,E,H,I,+	53 ± 2^A,H	12 ± 1^B,C,F,I	154 ± 1	0.58 ± 0.01⁺
(E) Lifepak CR Plus	67 ± 1 ^A,D,H,I,+	61 ± 1⁺	10 ± 1^B,C,H,I	125 ± 0^G,H,I	0.42 ± 0.01^G,H,I
(F) PowerHeart G5	148 ± 13⁺	96 ± 2⁺	15 ± 1^D,G	183 ± 1	0.72 ± 0^B,+
(G) Fred Easy Life	97 ± 1 ^B,C,+	74 ± 1^B,C,+	15 ± 0^F	123 ± 1^E	0.45 ± 0^E,H,+
(H) AED Plus	57 ± 1^A,D,E,I,+	53 ± 2^A,D,+	8 ± 0^E,I	126 ± 1^E,I	0.41 ± 0.01^E,G,I,+
(I) Cardiolife AED 2100	52 ± 1^A,D,E,H,+	45 ± 1^A,+	10 ± 0^B,C,D,E,H	127 ± 0^E,H	0.40 ± 0.01^E,H
(K) BLS without AED	25 ± 2				0.26 ± 0.01

The duration of the scenario was 300 seconds. Values are the mean ± standard deviation. The Philips HS1 asks the rescuer to press an “info button” for detailed information about chest compressions and ventilations after each rhythm analysis. The scenario was run 3 times when pressing the info button^§ and 3 times without pressing the button^*. A lack of statistical significance (p > 0.01) in comparison with a specific model is indicated by the identifying letter (A) – (I). ⁺p < 0.01 against the respective parameter in the scenarios with an optimized sequence of actions.

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