Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jemermed.2008.04.014
Title: Point-of-care bedside gas analyzer: Limited use of venous pCO2in emergency patients
Authors: Ibrahim, I.
Ooi, S.B.S.
Yiong, Huak C.
Sethi, S. 
Keywords: blood gas analysis
emergency
pCO2
venous
Issue Date: 2011
Source: Ibrahim, I., Ooi, S.B.S., Yiong, Huak C., Sethi, S. (2011). Point-of-care bedside gas analyzer: Limited use of venous pCO2in emergency patients. Journal of Emergency Medicine 41 (2) : 117-123. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jemermed.2008.04.014
Abstract: Background: Because arterial punctures are more painful, venous blood gas analysis has been proposed as an alternative. Objectives: To determine if venous pCO2 can replace arterial pCO2 in emergency patients using a bedside blood gas analyzer. Methods: This is a cross-sectional study. We recruited patients who were deemed by the attending Emergency Physicians to require arterial blood gas analysis to determine their ventilation or acid-base status. A venous and an arterial blood gas sample were drawn from the patient, temporally as close to each other as possible. Both samples were then analyzed using the same bedside blood gas analyzer immediately after collection. Results: There were 122 paired samples obtained. The strength of the association between arterial and venous pCO2 is r = 0.838 (p = 0.001). The Bland-Altman bias plot methods for agreement show a mean difference of 3.3 mm Hg with two standard deviation limits of agreement being -17.4 to 23.9; 93.4% of the pCO2 values fell within two standard deviation limits. Venous pCO2 below 30 mm Hg had a 100% (95% confidence interval [CI] 90.5-100) sensitivity and 100% (95% CI 80.7-100) Negative predictive value to rule out hypercarbia, defined as arterial pCO2 > 45 mm Hg. Conclusions: There is significant variability in the arteriovenous difference of pCO2 readings, hence, arterial punctures are still needed to specifically determine the arterial pCO2. © 2008.
Source Title: Journal of Emergency Medicine
URI: http://scholarbank.nus.edu.sg/handle/10635/33095
ISSN: 07364679
DOI: 10.1016/j.jemermed.2008.04.014
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

8
checked on Dec 14, 2017

WEB OF SCIENCETM
Citations

7
checked on Nov 18, 2017

Page view(s)

141
checked on Dec 10, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.