Use of the impedance threshold device in cardiopulmonary resuscitation

Table 1 CPP values in diverse animal studies

First author	CPR method	CPP	↑CPP (%) with ITD	P-values
Lurie et al[36]	ACD-CPR	21 ± 3.6	47.6	< 0.05
	ACD-CPR + ITD	31 ± 2.3
Lurie et al[41]	S-CPR	14 ± 2	42.9	< 0.006
	S-CPR + ITD	20 ± 2
Raedler et al[44]	S-CPR	15 ± 2	93.3	< 0.001
	ACD-CPR + ITD	29 ± 3
Srinivasan et al[45]	S-CPR	17.4 ± 3	64.7	< 0.01
	ACD-CPR + ITD	28.3 ± 2
Metzger et al[46]	S-CPR	22.4 ± 1.6	31.8	< 0.05
	ACD-CPR + ITD	29.5 ± 2.7
Yannopoulos et al[47]	S-CPR	14 ± 3	128.6	< 0.01
	ACD-CPR + ITD	32 ± 5

CPP: Coronary perfusion pressure; ITD: Impedance threshold device; CPR: Cardiopulmonary resuscitation; ACD-CPR: Active compression decompression cardiopulmonary resuscitation; S-CPR: Standard cardiopulmonary resuscitation.