Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2005 Jul;23(4):497-500.
doi: 10.1016/j.ajem.2004.12.006.

The Sensitivity of Room-Air Pulse Oximetry in the Detection of Hypercapnia

Affiliations

The Sensitivity of Room-Air Pulse Oximetry in the Detection of Hypercapnia

Michael D Witting et al. Am J Emerg Med. .

Abstract

Objective: To estimate the sensitivity of room-air pulse oximetry in the detection of moderate hypercapnia.

Methods: In this retrospective case-control study, charts were reviewed from patients with and without moderate hypercapnia (Pa co 2 >50 mm Hg), as determined by analysis of arterial blood gas samples obtained in the ED. Test characteristics (sensitivity, specificity, and likelihood ratios [LR) for room-air pulse oximetry < or = 96% to detect hypercapnia were calculated, as were confidence intervals.

Results: A total of 349 charts were eligible for abstraction-92 cases and 257 controls. A room-air pulse oximetry reading < or = 96% detected 88 of 92 cases of hypercapnia. Test characteristics were as follows (with 95% confidence interval): sensitivity, 0.96 (0.89-0.99); specificity, 0.39 (0.33-0.45), LR of a room-air pulse oximetry value >96%, 0.1 (0.04-0.3); and LR of a room-air pulse oximetry value < or = 96%, 1.6 (1.4-1.7).

Conclusion: Room-air pulse oximetry detects moderate hypercapnia with high sensitivity.

Comment in

Similar articles

See all similar articles

Cited by 3 articles

LinkOut - more resources

Feedback