When using capnometry or colorimetry to differentiate esophageal from tracheal placement of an endotracheal tube, which of the following conditions can result in a false-negative finding (i.e., no CO₂ present even when the tube is in the trachea)?

Question

Quizplus · Accepted Answer

During cardiac arrest, there is minimal or no pulmonary blood flow, which can result in little to no CO2 being exhaled, leading to a false-negative finding in capnometry or colorimetry.

When Using Capnometry or Colorimetry to Differentiate Esophageal from Tracheal