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Using Thoracic Impedance for Identification of Return of Spontaneous Circulation during Resuscitation

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5 Author(s)
Risdal, M. ; Dept. of Electr. & Comput. Eng., Univ. of Stavanger ; Losert, H. ; Sterz, F. ; Aase, S.O.
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Several studies have shown that the carotid pulse check is time-consuming and inaccurate. The sensitivity and specificity of manual pulse check has been reported to be 90% and 55% respectively. It has been suggested that circulatory information can be acquired by measuring the thoracic impedance via the defibrillator pads. We established a dataset of thoracic impedance measurement recorded using a modified automated external defibrillator. By using features describing the impedance waveform resulting from a heart contraction in a pattern recognition framework, we were able to classify periods with systolic blood pressure above or below 80 mmHg with a sensitivity of 90% and a specificity of 82%

Published in:

Signal Processing Symposium, 2006. NORSIG 2006. Proceedings of the 7th Nordic

Date of Conference:

7-9 June 2006