Transcutaneous CO2 Monitoring in Adults with Sleep-Related Breathing Disorders

  • Thorarinn Gislason
  • Bo Sandhagen
  • Gunnar Boman

Abstract

The accuracy of transcutaneous CO2 monitoring (Ptc CO2) was studied in 22 subjects suspected of having sleep-related breathing disorders, by comparison with arterial CO2 measurements (Pa CO2). At rest 40 simultaneous sets of PaCO2 and Ptc CO2 were obtained. The mean PaCO2 (±SD) was 5.3±0.9 kPa and Ptc CO2 was 5.7±1.0 kPa (r=0.79).

The ventilatory response to CO2 was evaluated by a CO2 rebreathing method, and simultaneous measurements of PaCO2, Ptc CO2 and end-tidal PCO2 (PETCO2) were made every min. Both PaCO2 and PETCO2 increased more during the first min of CO2 rebreathing than Ptc CO2 (p<0.001). Between 1 to 5 min after the start of rebreathing there were no significant differences between the three methods.

During sleep there was an increase in Ptc CO2 (by 0.1–0.3 kPa) with each apneic event, the magnitude of the increase depending on the length and distribution of these events. With repeated long apneas there was a cumulative increase in PtcCO2, especially during REM sleep. Continuous PtcCO2 monitoring proved useful in monitoring and diagnosing sleep-related breathing disorders.

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Published
1989-09-01
How to Cite
Gislason T., Sandhagen B., & Boman G. (1989). Transcutaneous CO2 Monitoring in Adults with Sleep-Related Breathing Disorders. Upsala Journal of Medical Sciences, 94(2), 171-181. https://doi.org/10.3109/03009738909178562
Section
Original Articles

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