Development of a minimally invasive microvascular ischemia monitor: noise and artifact extraction

Author

Shorrock, Susan M. ; Kun, Stevan ; Peura, Robert A. ; Dunn, Raymond M.

Author_Institution

Dept. of Biomed. Eng., Worcester Polytech. Inst., MA, USA

fYear

1999

fDate

8-9 Apr 1999

Firstpage

112

Lastpage

114

Abstract

Long-term postoperative pH monitoring of transplanted tissue for ischemia produces signals contaminated with noise and artifacts of various origins. Clinical interpretation of these pH recordings is difficult. The objective of our research is to determine the optimal filtering parameters for tissue pH signals to extract and reject the artifacts. The noise components present in long-term pH recordings were identified, extracted, and analyzed. Frequency ranges of identified artifact types were determined. Parameters were defined to effectively characterize each of the components by frequency, amplitude, and peak to peak slope. Based on the artifact analysis, it was concluded that to achieve clinical usefulness, only motion and position artifacts need to be rejected from the signal, while the influences of the “24 hour component” and drift are insignificant

Keywords

biomedical equipment; biomedical measurement; blood vessels; computerised monitoring; filtering theory; interference suppression; medical signal processing; motion compensation; pH measurement; patient monitoring; artifact extraction; clinical usefulness; long-term postoperative pH monitoring; low pass filtering; microvascular ischemia monitor; minimally invasive; motion artifacts; noise extraction; optimal filtering parameters; peak to peak slope; position artifacts; tissue pH signals; transplanted tissue; Algorithm design and analysis; Biomedical engineering; Biomedical monitoring; Filtering; Frequency; Ischemic pain; Minimally invasive surgery; Signal analysis; Signal processing algorithms; Software tools;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioengineering Conference, 1999. Proceedings of the IEEE 25th Annual Northeast

Conference_Location

West Hartford, CT

Print_ISBN

0-7803-5486-9

Type

conf

DOI

10.1109/NEBC.1999.755788

Filename

755788