To obtain lavage fluid, the bronchoscope is wedged at which of the following locations?

a. The level of the carina
b. The level of second or third generation bronchus
c. The level of fourth or fifth generation bronchus
d. At least at the level of the sixth generation bronchus

ANS: C
To obtain the lavage fluid, the bronchoscope is wedged at the level of fourth or fifth generation bronchus. A "good wedge" position means that the bronchoscope is advanced as far as possible while the distal lumen is still visible.