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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Alonso, E. Gonzalez-Otero, D. Aramendi, E. Ruiz de Gauna, S. Ruiz, J. Ayala, U. Russell, J.K. |
| Copyright Year | 2013 |
| Description | Author affiliation: Univ. of the Basque Country UPV/EHU, Bilbao, Spain (Alonso, E.; Gonzalez-Otero, D.; Aramendi, E.; Ruiz de Gauna, S.; Ruiz, J.; Ayala, U.) || Philips Healthcare, Seattle, WA, USA (Russell, J.K.) |
| Abstract | The thoracic impedance (TI) signal, available in current automated external defibrillators, has been proposed as an indicator of the compression depth (CD) in animal models of cardiac arrest. This study analysed the linear relationship between the maximum CD and the fluctuation caused in the TI in 19 out-of-hospital cardiac arrest episodes. The mean of the CD maxima, $D_{max},$ and the mean peak-to-peak fluctuation, $Z_{pp},$ were computed for every 5 s from the CD and TI signals, respectively. Three analyses were performed: distributions of $D_{max}$ and $Z_{pp}$ in all episodes, linear relation between $D_{max}$ and $Z_{pp}$ (correlation coefficient for every episode, $R_{e},$ and for the complete dataset, $R_{c})$ and time evolution of the correlation coefficient, $R_{i},$ for three consecutive intervals along every episode. Median $(25^{th}$ - $75^{th}$ percentiles) for $Z_{pp}$ were 1.12 (0.78 - 1.48), 1.35 (0.94 - 1.89) and 1.67 (1.09 - 2.33) Ω for $D_{max}$ <;38, 38≤ $D_{max}$ ≤51 (optimal compressions), and $D_{max}$ >51 mm respectively. High overlap between the three distributions was observed. $R_{e}$ varied between 0.04-0.83 (median=0.34), and $R_{c}$ was 0.27. Time evolution of $R_{i}$ did not show any tendency. $R_{i}$ varied between 0.06-0.94 (median=0.52). Linearity between $D_{max}$ and $Z_{pp}$ showed high variability between episodes in humans. The correlation coefficient for the complete dataset was low. |
| Sponsorship | IEEE Eng. Med. Biol. Soc. |
| Starting Page | 803 |
| Ending Page | 806 |
| File Size | 1319808 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781479908844 |
| ISSN | 2325887X |
| e-ISBN | 9781479908868 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-09-22 |
| Publisher Place | Spain |
| Access Restriction | Subscribed |
| Rights Holder | Creative Commons Attribution License 2.5 (CCAL) |
| Subject Keyword | Abstracts Materials Marine vehicles |
| Content Type | Text |
| Resource Type | Article |
| Subject | Computer Science Cardiology and Cardiovascular Medicine |
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