北京生物醫(yī)學(xué)工程

數(shù)字心電圖機(jī)濾波器通頻帶和打印方式的設(shè)定對心電圖判讀的影響

Influences of frequency pass-band settings and print mode on electrocardiogram reading of digital electrocardiograph

作者：周娟嚴(yán)勇曹德森吳昊

單位：                      中國人民解放軍總醫(yī)院醫(yī)學(xué)保障部 (北京100853)        

關(guān)鍵詞：數(shù)字心電圖機(jī)；濾波器通頻帶；幅度;信號波形；ST段水平

分類號：

出版年·卷·期（頁碼）：2014·33·5（508-513）

摘要：

目的為減少醫(yī)療設(shè)備設(shè)置、使用等因素對臨床診斷的影響，研究數(shù)字心電圖機(jī)濾波器通頻帶設(shè)置和打印方式選擇對心電波形的影響。方法連接數(shù)字心電圖機(jī)和檢定儀EGC-1C，檢定儀輸出信號穩(wěn)定不變。選擇數(shù)字心電圖機(jī)不同的低頻、高頻截止頻率和打印方式，測試心電信號的Q、R、S波幅值， ST段水平的變化。結(jié)果對多數(shù)數(shù)字心電圖機(jī)來說，低通截止頻率相同時(shí)，高通截止頻率越高，Q、R、S波幅值誤差越小。高頻截止頻率相同時(shí)，低頻截止頻率越高，ST段水平值越大。“節(jié)律”打印方式下，ST段水平值較大。結(jié)論濾波器通頻帶設(shè)置和打印方式選擇對心電圖的判讀有影響。濾波器的濾波作用、輸出數(shù)據(jù)有無數(shù)據(jù)補(bǔ)償、儀器設(shè)計(jì)和使用可能是造成此結(jié)果的原因。

Objective To reduce the influence of different settings in usage of medical equipment, we study on print mode and filter pass-band settings’ impact on output of certain digital electrocardiographs. Methods Joining the digital electrocardiograph and EGC-1C testing instrument together, and with the output signal of EGC-1C holding on, we inspect Q, R, S output amplitude, and ST waveform of digital electrocardiograph with different filter pass-band settings and print mode. Results In many digital electrocardiographs, Q, R, S output amplitude error becomes smaller as the higher cut-off frequency becoming larger at the same lower cut-off frequency. And the ST amplitude becomes higher as the lower cut-off frequency becoming smaller at the same higher cut-off frequency. ST amplitude is higher in rhythm print mode. Conclusions Filter pass-band settings and print mode have impact on output of digital electrocardiograph. Filter function, data compensation, equipment design and usage might be the reasons of different electrocardiogram results.

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