(A) Capnography in the operating room.
(B) CO2 color-change indicator: purple color before connection to circuit.
(C) The indicator turns yellow when connected to the circuit, indicating correct ETT placement.
Reproduced with permission from: Orebaugh SL. Confirmation of endotracheal tube placement. In: Atlas of Airway Management: Techniques and Tools, Lippincott Williams & Wilkins, Philadelphia 2007. Copyright © 2007 Lippincott Williams & Wilkins.
www.lww.com.
