What is the average tidal volume for an adult?

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Multiple Choice

What is the average tidal volume for an adult?

Tidal volume is the amount of air moved in or out with each normal breath. For an average adult, it’s about 6 to 8 milliliters per kilogram of body weight. Using a typical weight around 70 kg, that estimate yields roughly 420–560 mL, and 500 mL is commonly cited as the standard resting tidal volume. This makes 500 mL the best answer because it reflects the usual average for a healthy adult. The larger values would indicate a deeper breath and aren’t typical for a normal resting breath (and could risk overdistension on ventilation), while the very small value is far below what constitutes a normal tidal breath.

Tidal volume is the amount of air moved in or out with each normal breath. For an average adult, it’s about 6 to 8 milliliters per kilogram of body weight. Using a typical weight around 70 kg, that estimate yields roughly 420–560 mL, and 500 mL is commonly cited as the standard resting tidal volume. This makes 500 mL the best answer because it reflects the usual average for a healthy adult.

The larger values would indicate a deeper breath and aren’t typical for a normal resting breath (and could risk overdistension on ventilation), while the very small value is far below what constitutes a normal tidal breath.

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