Prof. Peter Smith
I am the author of this paper. The tests we have performed of this method are necessarily abstract and technical to allow a quantitative analysis of the artefact reduction method. I am sure you appreciate that. We have also performed exercise tests in a clinical setting by using an ECG as a gold-standard indicator. The results always showed an improved signal to noise with the artefact reduced PPG.
Since Nellcor already use the artefact recognition method in clinical practice our suggestion is that, with the additional use of our method for artefact reduction, the number of occasions when artefact suppression (following recognition) is required, will be reduced. Furthermore the errors associated with small (and therefore undetected) artefact can also be explored by our method. We hope that this approach can improve confidence in the use of pulse oximetry during episodes of mild artefact (to my knowledge a totally unexplored area)
please reply if I can be of any further help
many thanks for your comments