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  • Title: A simple, disposable end-tidal carbon dioxide detector.
    Author: Rosenberg M, Block CS.
    Journal: Anesth Prog; 1991; 38(1):24-6. PubMed ID: 1809050.
    Abstract:
    Detection of expired carbon dioxide is one of the most reliable methods of avoiding accidental esophageal intubation. Although capnography has become a standard monitoring technique in the hospital operating room, it is rarely available in the office setting or other arenas where emergency endotracheal intubation may be required. A new and inexpensive device, however, has been developed for assessing end-tidal carbon dioxide. This semi-quantitative detector fits between the endotracheal tube and the breathing circuit and uses a pH-sensitive indicator that changes color in response to different concentrations of carbon dioxide. Clinical studies indicate that this device provides similar results to standard capnography, and its inclusion in the emergency kit is strongly recommended.
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