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

Author

Risdal, M. ; Losert, Heidrun ; Sterz, Fritz ; Aase, Sven O. ; Eftestol, Trygve

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Stavanger

fYear

2006

fDate

7-9 June 2006

Firstpage

54

Lastpage

57

Abstract

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%

Keywords

bioelectric phenomena; blood pressure measurement; cardiology; defibrillators; electric impedance measurement; medical signal processing; patient diagnosis; pattern recognition; signal classification; automated external defibrillator pads; cardiopulmonary resuscitation; carotid pulse check; heart contraction; pattern classifier; pattern recognition; spontaneous circulation; systolic blood pressure; thoracic electric impedance measurement; Blood pressure; Cardiac arrest; Electrocardiography; Heart; Impedance measurement; Mechanical variables measurement; Pattern recognition; Pressure measurement; Pulse measurements; Rhythm;

fLanguage

English

Publisher

ieee

Conference_Titel

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

Conference_Location

Rejkjavik

Print_ISBN

1-4244-0412-6

Electronic_ISBN

1-4244-0413-4

Type

conf

DOI

10.1109/NORSIG.2006.275275

Filename

4052270