2009 Volume 47 Issue 6 Pages 628-632
Many kinds of artifacts may interfere in vital signals, especially in the case of neonatal signal measurement because of unpredictable motion. We observed neonatal SpO2 pulse wave data with high-amplitude artifact by stroking its back after nursing. The frequency of this artifact was around 1.35 Hz. This frequency was within the range of pulse oximeter band-pass filter (0.5∼5 Hz). We could not narrow the range of the filter band because of the possibility of losing the pulse wave frequency. In this study, we tried the time domain processing rotation matrix and separation matrix. We could obtain good pulse waves separated from artifact.
