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Anesth Analg 2003;97:776-779
© 2003 International Anesthesia Research Society

TECHNOLOGY, COMPUTING, AND SIMULATION

A Comparative Evaluation of Transcutaneous and End-Tidal Measurements of CO2 in Thoracic Anesthesia

Motoko Oshibuchi, MD, Sungsam Cho, MD, Tetsuya Hara, MD, Shiro Tomiyasu, MD, Tetsuji Makita, MD, and Koji Sumikawa, MD

Department of Anesthesiology, Nagasaki University School of Medicine, Nagasaki, Japan

Address correspondence and reprint requests to Sungsam Cho, MD, Department of Anesthesiology, Nagasaki University School of Medicine, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan. Address e-mail to chos{at}net.nagasaki-u.ac.jp

We performed this study to assess the accuracy of transcutaneous CO2 (PTCCO2) monitoring compared with end-tidal CO2 (PETCO2) in thoracic anesthesia. Twenty-six patients undergoing pneumonectomy with thoracotomy for which a long period of one-lung ventilation (OLV) was required were studied. The lungs were mechanically ventilated in the lateral decubitus position. PTCCO2, PETCO2, and arterial CO2 (PaCO2) were simultaneously measured during two-lung ventilation (TLV) and during OLV at intervals of 15 min. All patients completed the study protocol. Bland-Altman analysis revealed a bias of -0.4 mm Hg with a precision of ±2.5 mm Hg during OLV and 1.4 mm Hg with ±4.3 mm Hg during TLV when PTCCO2 and PaCO2 were compared and revealed a bias of -5.8 mm Hg with a precision of ±4.1 mm Hg during OLV and -7.1 mm Hg with ±4.6 mm Hg during TLV when PETCO2 and PaCO2 were compared. We conclude that PTCCO2 monitoring is accurate for evaluating CO2 levels during thoracic anesthesia.

IMPLICATIONS: Our study indicates that transcutaneous CO2 is more accurate than end-tidal CO2 during either two- or one-lung ventilation in thoracic anesthesia.




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A. Cuvelier, B. Grigoriu, L. C. Molano, and J.-F. Muir
Limitations of Transcutaneous Carbon Dioxide Measurements for Assessing Long-term Mechanical Ventilation
Chest, May 1, 2005; 127(5): 1744 - 1748.
[Abstract] [Full Text] [PDF]


Lippincott, Williams & Wilkins Anesthesia & Analgesia® is published for the International Anesthesia Research Society® by Lippincott Williams & Wilkins and Stanford University Libraries' HighWire Press®. Copyright 2003 by the International Anesthesia Research Society. Online ISSN: 1526-7598   Print ISSN: 0003-2999 HighWire Press
Copyright © 2003 by the International Anesthesia Research Society.