Leong Markus T, Ghebrial Joseph, Sturmann Kai, Hsu Carl K
Department of Emergency Medicine, Beth Israel Medical Center, University Hospital and Manhattan Campus for the Albert Einstein College of Medicine, New York, NY 11201, USA.
J Emerg Med. 2005 Jan;28(1):5-11. doi: 10.1016/j.jemermed.2004.06.012.
This study examines the effect of vinegar placement in the stomach on colorimetric end-tidal carbon dioxide (ETCO(2)) determinations after esophageal intubation. Using a blinded, prospective, before and after post-mortem swine model, colorimetric ETCO(2) was determined after aspiration of the stomach contents and after placement of aliquots of saline and vinegar. Data were compiled from 12 swine within 120 min post-mortem. In 12 of 12 trials, the ETCO(2) detector turned yellow, indicating "positive" determination of CO(2), but did not return to "purple" with multiple insufflations with 100% O(2). We conclude that esophageal intubation with a small amount of vinegar in the stomach can cause an irreversible color change of the detector to yellow. Color change indicating the presence of carbon dioxide without subsequent color change back to purple with insufflation with 100% oxygen should arouse suspicion of improper placement of the endotracheal tube.
本研究探讨胃内放置醋对食管插管后比色法测定呼气末二氧化碳（ETCO₂）的影响。采用盲法、前瞻性、死后猪模型，在抽吸胃内容物后以及放置生理盐水和醋的等分试样后，测定比色法ETCO₂。在猪死后120分钟内收集了12头猪的数据。在12次试验中的12次中，ETCO₂检测仪变为黄色，表明对CO₂的测定为“阳性”，但在多次用100%氧气吹入后未恢复为“紫色”。我们得出结论，胃内有少量醋的食管插管可导致检测仪不可逆地变为黄色。颜色变化表明存在二氧化碳，但在用100%氧气吹入后未随后变回紫色，这应引起对气管内导管放置不当的怀疑。
