{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T16:35:50Z","timestamp":1760027750484},"reference-count":11,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2002,4,19]],"date-time":"2002-04-19T00:00:00Z","timestamp":1019174400000},"content-version":"vor","delay-in-days":18,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Acta Anaesthesiol Scand"],"published-print":{"date-parts":[[2002,4]]},"abstract":"<jats:p><jats:bold>Background: <\/jats:bold> Rapid detection of a misplaced endotracheal tube in the esophagus is crucial, especially in emergency situations. Hence, we have compared the ability of a colorimetric CO<jats:sub>2<\/jats:sub> indicator (Colibri technology, CO<jats:sub>2<\/jats:sub>ntrol 1) and a capnography to differentiate oesophageal and tracheal intubation, with and without CO<jats:sub>2<\/jats:sub> air in the esophagus.<\/jats:p><jats:p><jats:bold>Methods: <\/jats:bold> Fourteen otherwise healthy patients were intubated with an endotracheal tube in the trachea under general anesthesia. After a positive verification of this endotracheal tube and established mechanical ventilation a second endotracheal tube was placed in the esophagus. Both were initially ventilated four times, and expired CO<jats:sub>2<\/jats:sub> was measured with a mainstream capnograph and a colorimetric indicator. In the remaining five patients CO<jats:sub>2<\/jats:sub> containing air was inserted into the esophagus first and then ventilated four times.<\/jats:p><jats:p><jats:bold>Results: <\/jats:bold> Both the colorimetric indicator and mainstream capnograph verified correct placement of the endotracheal tube from the first ventilation.<\/jats:p><jats:p>When the tube was placed in the esophagus, both methods correctly showed that no CO<jats:sub>2<\/jats:sub> was present. However, in patients (n=5) with CO<jats:sub>2<\/jats:sub> installed in their esophagus, the colorimetric indicator, but not the capnograph, had readings showing that CO<jats:sub>2<\/jats:sub> was present. This may cause a misinterpretation of correct tracheal placement.<\/jats:p><jats:p><jats:bold>Conclusions: <\/jats:bold> We found that in emergency situations where CO<jats:sub>2<\/jats:sub> containing air may be present in the esophagus, capnography should be the preferred method of verifying endotracheal and not oesophageal intubation. The tested colorimetric CO<jats:sub>2<\/jats:sub> indicator (Colibri technology, CO<jats:sub>2<\/jats:sub>ntrol 1) is very sensitive to low CO<jats:sub>2<\/jats:sub> values. It may therefore falsely indicate correct endotracheal intubation, even when the tube is in the oesophageus.<\/jats:p>","DOI":"10.1034\/j.1399-6576.2002.460422.x","type":"journal-article","created":{"date-parts":[[2003,3,10]],"date-time":"2003-03-10T09:50:00Z","timestamp":1047289800000},"page":"455-457","source":"Crossref","is-referenced-by-count":31,"title":["Rapid detection of oesophageal intubation: take care when using colorimetric capnometry"],"prefix":"10.1111","volume":"46","author":[{"given":"S. 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