论文信息 - Is measurement of end-tidal CO2 through a nasal cannula reliable?

Is measurement of end-tidal CO2 through a nasal cannula reliable?

When using a nasal cannula to sample gases expired by a patient, air from the room may dilute the sample. For this reason, the accuracy of the partial pressure of end-tidal carbon dioxide (ETCO2) measurements is questionable. We experimentally examined the reliability of ETCO2 measurements through a nasal cannula and found that they depended on both biological factors (tidal volume and respiratory rates) and mechanical factors (the diameter and the length of the cannula and the diameter of the prongs). These results suggest that the correct use of an appropriate sampling cannula will provide reliable ETCO2 measurements without clinical problems.

T. Ichinohe | K. Fukuda | Y. Kaneko

[1] Y. Kaneko. Clinical perspectives on capnography during sedation and general anesthesia in dentistry. , 1995, Anesthesia progress.

[2] S. Derrick,et al. Evaluation of a nasal/oral discriminate sampling system for capnographic respiratory monitoring. , 1993, AANA journal.

[3] A. Ohmura,et al. The Influence of Expiratory Time on the Arterial to End-tidal Carbon Dioxide Tension Differences , 1993 .

[4] J. Heavner,et al. Respiratory frequency and artifact affect the capnographic baseline in infants. , 1993, Anesthesia and analgesia.

[5] Hunter Ja. A cost-free, simple method for monitoring end tidal carbon dioxide through nasal cannulae. , 1990 .

[6] W. Ackerman,et al. End tidal carbon dioxide and respiratory rate measurement during conscious sedation through a nasal cannula. , 1990, Anesthesia progress.

[7] J. Anderson,et al. Respiratory monitoring for anesthesia and sedation. , 1987, Anesthesia progress.

[8] D. E. Lees,et al. Mass spectrometer monitoring of patients with regional anesthesia. , 1985, Anesthesiology.

[9] R. Crone,et al. Mechanical influences on the capnogram. , 1984, Critical care medicine.

[10] A. Forster,et al. Respiratory Depressant Effects of Different Doses of Midazolam and Lack of Reversal with Naloxone‐A Double‐Blind Randomized Study , 1983, Anesthesia and analgesia.