Using the Ped formula, what is the endotracheal tube size for a 6-year-old child?

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Multiple Choice

Using the Ped formula, what is the endotracheal tube size for a 6-year-old child?

Explanation:
The Ped formula estimates the endotracheal tube’s internal diameter in millimeters as ID = (age in years)/4 + 4. For a 6-year-old, that’s 6/4 = 1.5, plus 4, giving 5.5 mm. So the appropriate tube size is about 5.5 mm ID. In the options, the 5.5 measurement corresponds to that size, even though it’s labeled in the list; the intended selection is the one indicating 5.5 mm.

The Ped formula estimates the endotracheal tube’s internal diameter in millimeters as ID = (age in years)/4 + 4. For a 6-year-old, that’s 6/4 = 1.5, plus 4, giving 5.5 mm. So the appropriate tube size is about 5.5 mm ID. In the options, the 5.5 measurement corresponds to that size, even though it’s labeled in the list; the intended selection is the one indicating 5.5 mm.

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