Abstract
Reported occurrences of ECG artifact caused by blood and other fluid pumps are infrequent in critical care environments. However, pump induced artifact (PIA) is considered to be of notable risk since it may resemble a variety of cardiac arrythmias and may be of sufficient amplitude to render ECG sensing, arrhythmia analysis, manual interpretation, and patient alarms useless. Considerable nursing and clinical engineering staff time may be consumed in correcting the problem. The production of PIA by piezoelectric and triboelectric effects due to pump mechanism and tubing is discussed. A simplified circuit model, derived from a more complete model, that can serve as guide in the analysis of PIA reduction in the clinical environment is described. A practical method for PIA reduction, that includes ECG electrodes repositioning and the use of an ad hoc aluminum foil capacitor for reduction higher frequency components when present, is presented.
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