Bronchial anatomy

Question 1

What is the first take off from the R main bronchus?

Answer 1

The R upper lobe.

Question 2

What are the sub-segments of the R upper lobe?

Answer 2

apical (B1), posterior (B2), anterior (B3)

Question 3

What is the name of the classification system where segments are named B-#?

Answer 3

Boyden classification system.

Question 4

Passing the R upper lobe take off, what airway structure are you in? What takeoff will you come to next?

Answer 4

Bronchus intermedius. Next is the R middle lobe.

Question 5

What are sub-segments of the R middle lobe?

Answer 5

lateral (B4) and medial (B5)

Question 6

What is the first takeoff in the R lower lobe?

Answer 6

superior segment (B6)

Question 7

What are the remaining four segments of the R lower lobe? (after superior)

Answer 7

medial (B7), anterior (B8), lateral (B9), posterior (B10)

Question 8

What are the segments of the L upper lobe?

Answer 8

in the proper upper lobe, there is a fusion of the apical and posterior segments into a apico-posterior (B1/2) segments and an anterior segment (B3). There is also the lingula which has a superior (B4) and inferior (B5).

Question 9

How is the L upper lobe different from the R in terms of segments

Answer 9

The L upper lobe apico-posterior segment is a fusion of the apical and posterior segments on the R.

Question 10

What is the first take off of the L lower lobe?

Answer 10

superior segment (B6).

Question 11

What are the remaining segments of the L lower lobe?

Answer 11

“ALP” anterior (B8), lateral (B9), posterior (B10)

Question 12

What is a difference between the segments of the L and R lower lobes

Answer 12

The L lower lobe does not have a medial segment.