Given what we know, we can confirm that the primary method of confirming endotracheal tube placement within the trachea is a chest x-ray.
<h3>Why use an X-ray?</h3>
A chest x-ray of the patient will be the most secure way of confirming the placement of an endotracheal tube within the trachea given that it allows the professionals in question to see its exact placement. This ensures that the placement is correct and that the patient will not have respiratory issues.
Therefore, we can confirm that the primary method most often used for confirming endotracheal tube placement within the trachea is a chest x-ray.
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