Image Based Question-66643

What would be the most probable position of the patient during aspiration when the segment of lung as marked by an arrow in the image is involved?

A. Supine.

B. Sitting.

C. Standing.

D. None of the above.

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Correct Answer » A Explanation

Ans:A. Supine

Superior segment of right lower lobe is marked in the image.

Bronchopulmonary Segment

• It is the anatomical, functional, and surgical unit/subdivision of the lung and refers to the portion of the lung supplied by each segmental/tertiary bronchus and segmental/tertiary artery.

• It consists of the segmental/tertiary bronchus, a segmental branch of the tertiary artery, a segment of the lung tissue, and the surrounding connective-tissue septum.

• The bronchopulmonary segment is important because a surgeon can remove one segment without seriously disrupting surrounding segments.

Right lung

The right lung is subdivided into three lobes with ten segments.

• right upper lobe

1. apical segment
2. posterior segment
3. anterior segment

• right middle lobe (or more correctly – just middle lobe)

1. lateral segment
2. medial segment

• right lower lobe

1. superior segment
2. medial segment
3. anterior segment
4. lateral segment
5. posterior segment

Left lung

The left lung is subdivided into two lobes and thereby, into eight segments.

• left upper lobe

1. apicoposterior segment
2. anterior segment
3. superior lingular segment
4. inferior lingular segment

• left lower lobe

1. superior segment
2. anteromedial segment
3. lateral segment
4. posterior segment

Specific lobe of lung involved by aspiration depends on the position of the patients

• supine

• superior segment of right lower lobe

• standing/sitting

• posterobasal segment of right lower lobe

• lying on right side

• right middle lobe or posterior segment of right upper lobe (as seen in image)

• More often seen in the right lung than the left

• result of wider and straighter right mainstem bronchus