OBJECTIVE: The placement of defibrillation pads at ideal anatomical sites is one of the major determinants of transthoracic defibrillation success. However, the optimal pads position for ventricular defibrillation is still undetermined. In the present study, we compared the effects of two different pads positions on defibrillation success rate in a pediatric porcine model of cardiac arrest. METHODS: Eight domestic male pigs weighing 12-15 kg were randomized to receive shocks using either the anterior-posterior (AP) or the anterior-lateral (AL) position with pediatric pads. Ventricular fibrillation (VF) was electrically induced and untreated for 30 s. A sequence of randomized biphasic electrical shocks ranging from 10 to 100 J was attempted. If the defibrillation failed to terminate VF, a 100 J rescuer shock was then delivered. After a recovery interval of 5 min, the sequence was repeated for a total of approximately 30 test shocks were attempted for each animal. The dose response curves were constructed and the defibrillation thresholds were compared between groups. RESULTS: The aggregated success rate was 65.6% for AP placement and 43.0% for AL one (p=0.0005) when shock energy was between 10 and 70 J. A significantly lower 50% defibrillation threshold was obtained for AP pads placement compared with traditional AL pads position (2.1±0.4 J/kg vs. 3.6±0.9 J/kg, p=0.041). CONCLUSION: In this pediatric porcine model of cardiac arrest, the anterior-posterior placement of pediatric pads yielded a higher success rate by lowering defibrillation threshold compared to the anterior-lateral position.

Comparison of defibrillation efficacy between two pads placements in a pediatric porcine model of cardiac arrest / G. Ristagno, T. Yu, W. Quan, G. Freeman, Y. Li. - In: RESUSCITATION. - ISSN 0300-9572. - 83:6(2012), pp. 755-759.

Comparison of defibrillation efficacy between two pads placements in a pediatric porcine model of cardiac arrest

G. Ristagno;
2012

Abstract

OBJECTIVE: The placement of defibrillation pads at ideal anatomical sites is one of the major determinants of transthoracic defibrillation success. However, the optimal pads position for ventricular defibrillation is still undetermined. In the present study, we compared the effects of two different pads positions on defibrillation success rate in a pediatric porcine model of cardiac arrest. METHODS: Eight domestic male pigs weighing 12-15 kg were randomized to receive shocks using either the anterior-posterior (AP) or the anterior-lateral (AL) position with pediatric pads. Ventricular fibrillation (VF) was electrically induced and untreated for 30 s. A sequence of randomized biphasic electrical shocks ranging from 10 to 100 J was attempted. If the defibrillation failed to terminate VF, a 100 J rescuer shock was then delivered. After a recovery interval of 5 min, the sequence was repeated for a total of approximately 30 test shocks were attempted for each animal. The dose response curves were constructed and the defibrillation thresholds were compared between groups. RESULTS: The aggregated success rate was 65.6% for AP placement and 43.0% for AL one (p=0.0005) when shock energy was between 10 and 70 J. A significantly lower 50% defibrillation threshold was obtained for AP pads placement compared with traditional AL pads position (2.1±0.4 J/kg vs. 3.6±0.9 J/kg, p=0.041). CONCLUSION: In this pediatric porcine model of cardiac arrest, the anterior-posterior placement of pediatric pads yielded a higher success rate by lowering defibrillation threshold compared to the anterior-lateral position.
Cardiac arrest; Ventricular fibrillation; Defibrillation efficacy; Anterior-posterior; Anterior-lateral; Pads placement
Settore MED/41 - Anestesiologia
Article (author)
File in questo prodotto:
File Dimensione Formato  
Resuscitation2012_PadsPosition.pdf

accesso riservato

Tipologia: Publisher's version/PDF
Dimensione 253.64 kB
Formato Adobe PDF
253.64 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/620369
Citazioni
  • ???jsp.display-item.citation.pmc??? 3
  • Scopus 13
  • ???jsp.display-item.citation.isi??? 16
social impact