Chest ACCP Education Calendar
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Guest Access | Sign In via User Name/Password
This Article
Right arrow Full Text (PDF) Free
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Article Archive
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Wagener, J.
Right arrow Articles by Hendricker, C
Right arrow Search for Related Content
PubMed
Right arrow Articles by Wagener, J.
Right arrow Articles by Hendricker, C

Chest, Vol 92, 1047-1049, Copyright © 1987 by American College of Chest Physicians

ARTICLES

Intra-subject variability of noninvasive oxygen measurements

JS Wagener and C Hendricker
Department of Pediatrics, University of Iowa Hospitals and Clinics, Iowa City.

We studied ten healthy, nonsmoking adults to determine the intra- subject variability for repeated measurements of transcutaneous oxygen pressure (tcPO2) and oxygen saturation by pulse oximetry (SaO2). Intra- subject variability was less for SaO2 than for tcPO2 and increased at lower arterial oxygen tensions. Inter-machine variability was an important contributor to intra-subject variability for tcPO2. The percentage change from baseline required to detect a significant physiologic change while breathing room air was 1.2 percent for SaO2 and 13.8 percent for tcPO2. When subjects breathed a 15 percent oxygen mixture, the percentage change for significance increased to a maximum of 4.7 percent for SaO2 and 35.8 percent for tcPO2. These results are applicable to non-neonatal pediatric and adult patients and demonstrate the importance of intra-subject variability when performing noninvasive measurements of patient oxygenation over time.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1987 by the American College of Chest Physicians.