When checking for proper placement of an endotracheal tube or a tracheostomy tube on a chest radiograph, how far above the carina should the distal tip of the tube be positioned?
a. 1 to 2 cm
b. 2 to 4 cm
c. 3 to 6 cm
d. 6 to 8 cm
ANS: C
The tube tip should be approximately 3 to 6 cm above the carina in adults, or between the second and fourth tracheal rings.
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