Unexpected sawtooth artifact in beat-to-beat pulse transit time measured from patient monitor data.

ABSTRACT: OBJECT:It is increasingly popular to collect as much data as possible in the hospital setting from clinical monitors for research purposes. However, in this setup the data calibration issue is often not discussed and, rather, implicitly assumed, while the clinical monitors might not be designed for the data analysis purpose. We hypothesize that this calibration issue for a secondary analysis may become an important source of artifacts in patient monitor data. We test an off-the-shelf integrated photoplethysmography (PPG) and electrocardiogram (ECG) monitoring device for its ability to yield a reliable pulse transit time (PTT) signal. APPROACH:This is a retrospective clinical study using two databases: one containing 35 subjects who underwent laparoscopic cholecystectomy, another containing

SUBMITTER: Lin YT 

PROVIDER: S-EPMC6733479 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature