NDLI: Oxygen saturation resolution influences regularity measurements

Content Provider	IEEE Xplore Digital Library
Author	Garde, A. Karlen, W. Dehkordi, P. Ansermino, J.M. Dumont, G.A.
Copyright Year	2014
Description	Author affiliation: Depts. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC, Canada (Garde, A.; Karlen, W.; Dehkordi, P.; Ansermino, J.M.; Dumont, G.A.)
Abstract	The measurement of regularity in the oxygen saturation $(SpO_{2})$ signal has been suggested for use in identifying subjects with sleep disordered breathing (SDB). Previous work has shown that children with SDB have lower $SpO_{2}$ regularity than subjects without SDB (NonSDB). Regularity was measured using non-linear methods like approximate entropy (ApEn), sample entropy (SamEn) and Lempel-Ziv (LZ) complexity. Different manufacturer's pulse oximeters provide $SpO_{2}$ at various resolutions and the effect of this resolution difference on $SpO_{2}$ regularity, has not been studied. To investigate this effect, we used the $SpO_{2}$ signal of children with and without SDB, recorded from the Phone Oximeter (0.1% resolution) and the same $SpO_{2}$ signal rounded to the nearest integer (artificial 1% resolution). To further validate the effect of rounding, we also used the $SpO_{2}$ signal (1% resolution) recorded simultaneously from polysomnography (PSG), as a control signal. We estimated $SpO_{2}$ regularity by computing the ApEn, SamEn and LZ complexity, using a 5-min sliding window and showed that different resolutions provided significantly different results. The regularity calculated using 0.1% $SpO_{2}$ resolution provided no significant differences between SDB and NonSDB. However, the artificial 1% resolution $SpO_{2}$ provided significant differences between SDB and NonSDB, showing a more random $SpO_{2}$ pattern (lower $SpO_{2}$ regularity) in SDB children, as suggested in the past. Similar results were obtained with the $SpO_{2}$ recorded from PSG (1% resolution), which further validated that this $SpO_{2}$ regularity change was due to the rounding effect. Therefore, the $SpO_{2}$ resolution has a great influence in regularity measurements like ApEn, SamEn and LZ complexity that should be considered when studying the $SpO_{2}$ pattern in children with SDB.
Sponsorship	IEEE Eng. Med. Biol. Soc.
Starting Page	2257
Ending Page	2260
File Size	561549
Page Count	4
File Format	PDF
ISBN	9781424479290
ISSN	1557170X
DOI	10.1109/EMBC.2014.6944069
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-08-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Signal resolution Entropy Complexity theory Pediatrics Sleep apnea Medical diagnostic imaging
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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