Reducing CPR artefacts in ventricular fibrillation in vitro

被引:49
作者
Langhelle, A [1 ]
Eftestol, T
Myklebust, H
Eriksen, M
Holten, BT
Steen, PA
机构
[1] Ulleval Univ Hosp, Expt Med Res Inst, N-0407 Oslo, Norway
[2] Norwegian Air Ambulance, N-1441 Drobak, Norway
[3] Stavanger Univ Coll, Dept Elect & Comp Engn, N-4091 Stavanger, Norway
[4] Laerdal Med AS, N-4002 Stavanger, Norway
[5] Ulleval Univ Hosp, Div Surg, N-0407 Oslo, Norway
关键词
artefacts; adaptive filtering; cardiopulmonary resuscitation; electrocardiography; ventricular fibrillation;
D O I
10.1016/S0300-9572(00)00259-8
中图分类号
R4 [临床医学];
学科分类号
1002 ; 100602 ;
摘要
CPR creates artefacts on the ECG, and a pause in CPR is therefore mandatory during rhythm analysis. This hands-off interval is harmful to the already marginally circulated tissues during CPR, and if the artefacts could be removed by filtering, the rhythm could be analyzed during ongoing CPR. Fixed coefficient filters used in animals cannot solve this problem in humans, due to overlapping frequency spectra for artefacts and VF signals. In the present study, we established a method for mixing CPR-artefacts (noise) from a pig with human VF (signal) at various signal-to-noise ratios (SNR) from -10 dB to +10 dB. We then developed a new methodology for removing CPR artefacts by applying a digital adaptive filter, and compared the results with this filter to that of a fixed coefficient filter. The results with the adaptive filter clearly outperformed the fixed coefficient filter for all SNR levels. At an original SNR of 0 dB, the restored SNRs were 9.0 +/- 0.7 dB versus 0.9 +/- 0.7 dB respectively (P < 0.0001). (C) 2001 Elsevier Science Ireland Ltd. All rights reserved.
引用
收藏
页码:279 / 291
页数:13
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