The University of Southampton
University of Southampton Institutional Repository

Is the orientation of the apical defibrillation paddle of importance during manual external defibrillation?

Is the orientation of the apical defibrillation paddle of importance during manual external defibrillation?
Is the orientation of the apical defibrillation paddle of importance during manual external defibrillation?
Objective: Transthoracic impedance (TTI) is a factor determining the magnitude of the transmyocardial current during external defibrillation. Minimising TTI increases the chances of successful defibrillation. Most external defibrillation paddles are rectangular in shape and can, therefore, be placed in a transverse or longitudinal orientation. The apical paddle is often placed in a transverse orientation. This may theoretically result in a higher TTI than a longitudinal orientation because of poorer contact at the lateral paddle edges. We compared TTI with the apical paddle in both a transverse and longitudinal orientation. Materials and methods: Twenty sequential anaesthetised patients were studied. A pair of defibrillator paddles were instrumented to measure paddle force. TTI was recorded pre-operatively at end-expiration with the apical paddle in both longitudinal and transverse orientations. The sternal paddle was placed in a longitudinal orientation for all measurements. Results: TTI decreased in both transverse and longitudinal orientations as paddle force increased. Transverse paddle orientation resulted in a significantly (P<0.01) higher TTI than longitudinal orientation at all paddle forces below 12 kg force. Conclusion: The longitudinal orientation of a rectangular defibrillation paddle provides a lower TTI than orientation horizontally.
transthoracic impedance, defibrillation, transmyocardial current
0300-9572
15-18
Deakin, Charles D.
560d993b-bbc9-4548-9990-272ed18a011d
Sado, Daniel M.
d2762586-ebb0-4e7e-8763-5413e45ea0ad
Petley, Graham W.
4f2da40b-3c7b-4adc-b75c-e24e62bb1cf0
Clewlow, Frank
94c8568b-d5ea-4446-a712-4fa1560895c2
Deakin, Charles D.
560d993b-bbc9-4548-9990-272ed18a011d
Sado, Daniel M.
d2762586-ebb0-4e7e-8763-5413e45ea0ad
Petley, Graham W.
4f2da40b-3c7b-4adc-b75c-e24e62bb1cf0
Clewlow, Frank
94c8568b-d5ea-4446-a712-4fa1560895c2

Deakin, Charles D., Sado, Daniel M., Petley, Graham W. and Clewlow, Frank (2003) Is the orientation of the apical defibrillation paddle of importance during manual external defibrillation? Resuscitation, 56 (1), 15-18. (doi:10.1016/S0300-9572(02)00290-3). (PMID:12505733)

Record type: Article

Abstract

Objective: Transthoracic impedance (TTI) is a factor determining the magnitude of the transmyocardial current during external defibrillation. Minimising TTI increases the chances of successful defibrillation. Most external defibrillation paddles are rectangular in shape and can, therefore, be placed in a transverse or longitudinal orientation. The apical paddle is often placed in a transverse orientation. This may theoretically result in a higher TTI than a longitudinal orientation because of poorer contact at the lateral paddle edges. We compared TTI with the apical paddle in both a transverse and longitudinal orientation. Materials and methods: Twenty sequential anaesthetised patients were studied. A pair of defibrillator paddles were instrumented to measure paddle force. TTI was recorded pre-operatively at end-expiration with the apical paddle in both longitudinal and transverse orientations. The sternal paddle was placed in a longitudinal orientation for all measurements. Results: TTI decreased in both transverse and longitudinal orientations as paddle force increased. Transverse paddle orientation resulted in a significantly (P<0.01) higher TTI than longitudinal orientation at all paddle forces below 12 kg force. Conclusion: The longitudinal orientation of a rectangular defibrillation paddle provides a lower TTI than orientation horizontally.

Full text not available from this repository.

More information

Published date: January 2003
Keywords: transthoracic impedance, defibrillation, transmyocardial current
Organisations: Clinical & Experimental Sciences

Identifiers

Local EPrints ID: 383377
URI: https://eprints.soton.ac.uk/id/eprint/383377
ISSN: 0300-9572
PURE UUID: 69cc7b5a-1655-4c65-8b9e-a0535bb274eb
ORCID for Graham W. Petley: ORCID iD orcid.org/0000-0002-3295-0444

Catalogue record

Date deposited: 29 Jan 2016 09:38
Last modified: 15 Aug 2019 00:52

Export record

Altmetrics

Contributors

Author: Daniel M. Sado
Author: Frank Clewlow

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×