To verify the correct placement of an oral endotracheal tube (ET)after insertion,the best initial action by the nurse is to

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End-tidal CO₂ monitors are currently recommended for rapid verification of ET placement.Auscultation for bilateral breath sounds and checking chest expansion are also used,but they are not as accurate as end-tidal CO₂ monitoring.A chest x-ray confirms the placement but is done after the tube is secured.

To Verify the Correct Placement of an Oral Endotracheal Tube