When Determining What Size Endotracheal Tube a Patient Will Need

When determining what size endotracheal tube a patient will need, what is a general rule that can be used to determine the correct size?

A) A tube that, with the cuff deflated, is larger than the trachea's internal diameter
B) A tube that, with the cuff inflated, is the same size as the trachea
C) A tube that is just smaller than the trachea's internal diameter
D) A tube that is just larger than the trachea's internal diameter

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